Documentation/DocBook/media/dvb/dvbproperty.xml

   1 <section id="frontend-properties">
   2 <title>DVB Frontend properties</title>
   3 <para>Tuning into a Digital TV physical channel and starting decoding it
   4     requires to change a set of parameters, in order to control the
   5     tuner, the demodulator, the Linear Low-noise Amplifier (LNA) and to set the
   6     antena subsystem via Satellite Equipment Control (SEC), on satellital
   7     systems. The actual parameters are specific to each particular digital
   8     TV standards, and may change as the digital TV specs evolutes.</para>
   9 <para>In the past, the strategy used were to have an union with the parameters
  10     needed to tune for DVB-S, DVB-C, DVB-T and ATSC delivery systems grouped
  11     there. The problem is that, as the second generation standards appeared,
  12     those structs were not big enough to contain the additional parameters.
  13     Also, the union didn't have any space left to be expanded without breaking
  14     userspace. So, the decision was to deprecate the legacy union/struct based
  15     approach, in favor of a properties set approach.</para>
  16 <para>By using a properties set, it is now possible to extend and support any
  17     digital TV without needing to redesign the API</para>
  18 <para>Example: with the properties based approach, in order to set the tuner
  19     to a DVB-C channel at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol
  20     rate of 5.217 Mbauds, those properties should be sent to
  21     <link linkend="FE_GET_PROPERTY"><constant>FE_SET_PROPERTY</constant></link> ioctl:</para>
  22     <itemizedlist>
  23         <listitem>&DTV-FREQUENCY; = 651000000</listitem>
  24         <listitem>&DTV-MODULATION; = QAM_256</listitem>
  25         <listitem>&DTV-INVERSION; = INVERSION_AUTO</listitem>
  26         <listitem>&DTV-SYMBOL-RATE; = 5217000</listitem>
  27         <listitem>&DTV-INNER-FEC; = FEC_3_4</listitem>
  28         <listitem>&DTV-TUNE;</listitem>
  29     </itemizedlist>
  30 <para>NOTE: This section describes the DVB version 5 extension of the DVB-API,
  31 also called "S2API", as this API were added to provide support for DVB-S2. It
  32 was designed to be able to replace the old frontend API. Yet, the DISEQC and
  33 the capability ioctls weren't implemented yet via the new way.</para>
  34 <para>The typical usage for the <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant>
  35 API is to replace the ioctl's were the <link linkend="dvb-frontend-parameters">
  36 struct <constant>dvb_frontend_parameters</constant></link> were used.</para>
  37
  38 <section id="dtv-stats">
  39 <title>DTV stats type</title>
  40 <programlisting>
  41 struct dtv_stats {
  42         __u8 scale;     /* enum fecap_scale_params type */
  43         union {
  44                 __u64 uvalue;   /* for counters and relative scales */
  45                 __s64 svalue;   /* for 1/1000 dB measures */
  46         };
  47 } __packed;
  48 </programlisting>
  49 </section>
  50 <section id="dtv-fe-stats">
  51 <title>DTV stats type</title>
  52 <programlisting>
  53 #define MAX_DTV_STATS   4
  54
  55 struct dtv_fe_stats {
  56         __u8 len;
  57         struct dtv_stats stat[MAX_DTV_STATS];
  58 } __packed;
  59 </programlisting>
  60 </section>
  61
  62 <section id="dtv-property">
  63 <title>DTV property type</title>
  64 <programlisting>
  65 /* Reserved fields should be set to 0 */
  66
  67 struct dtv_property {
  68         __u32 cmd;
  69         __u32 reserved[3];
  70         union {
  71                 __u32 data;
  72                 struct dtv_fe_stats st;
  73                 struct {
  74                         __u8 data[32];
  75                         __u32 len;
  76                         __u32 reserved1[3];
  77                         void *reserved2;
  78                 } buffer;
  79         } u;
  80         int result;
  81 } __attribute__ ((packed));
  82
  83 /* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */
  84 #define DTV_IOCTL_MAX_MSGS 64
  85 </programlisting>
  86 </section>
  87 <section id="dtv-properties">
  88 <title>DTV properties type</title>
  89 <programlisting>
  90 struct dtv_properties {
  91         __u32 num;
  92         struct dtv_property *props;
  93 };
  94 </programlisting>
  95 </section>
  96
  97 <section>
  98         <title>Property types</title>
  99 <para>
 100 On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY and FE_SET_PROPERTY</link>,
 101 the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to
 102 get/set up to 64 properties. The actual meaning of each property is described on the next sections.
 103 </para>
 104
 105 <para>The available frontend property types are shown on the next section.</para>
 106 </section>
 107
 108 <section id="fe_property_parameters">
 109         <title>Digital TV property parameters</title>
 110         <section id="DTV-UNDEFINED">
 111         <title><constant>DTV_UNDEFINED</constant></title>
 112         <para>Used internally. A GET/SET operation for it won't change or return anything.</para>
 113         </section>
 114         <section id="DTV-TUNE">
 115         <title><constant>DTV_TUNE</constant></title>
 116         <para>Interpret the cache of data, build either a traditional frontend tunerequest so we can pass validation in the <constant>FE_SET_FRONTEND</constant> ioctl.</para>
 117         </section>
 118         <section id="DTV-CLEAR">
 119         <title><constant>DTV_CLEAR</constant></title>
 120         <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para>
 121         </section>
 122         <section id="DTV-FREQUENCY">
 123                 <title><constant>DTV_FREQUENCY</constant></title>
 124
 125                 <para>Central frequency of the channel.</para>
 126
 127                 <para>Notes:</para>
 128                 <para>1)For satellital delivery systems, it is measured in kHz.
 129                         For the other ones, it is measured in Hz.</para>
 130                 <para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
 131                         E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of
 132                         the channel which is 6MHz.</para>
 133
 134                 <para>3)As in ISDB-Tsb the channel consists of only one or three segments the
 135                         frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
 136                         central frequency of the channel is expected.</para>
 137         </section>
 138         <section id="DTV-MODULATION">
 139         <title><constant>DTV_MODULATION</constant></title>
 140 <para>Specifies the frontend modulation type for cable and satellite types. The modulation can be one of the types bellow:</para>
 141 <programlisting>
 142  typedef enum fe_modulation {
 143         QPSK,
 144         QAM_16,
 145         QAM_32,
 146         QAM_64,
 147         QAM_128,
 148         QAM_256,
 149         QAM_AUTO,
 150         VSB_8,
 151         VSB_16,
 152         PSK_8,
 153         APSK_16,
 154         APSK_32,
 155         DQPSK,
 156         QAM_4_NR,
 157  } fe_modulation_t;
 158 </programlisting>
 159         </section>
 160         <section id="DTV-BANDWIDTH-HZ">
 161                 <title><constant>DTV_BANDWIDTH_HZ</constant></title>
 162
 163                 <para>Bandwidth for the channel, in HZ.</para>
 164
 165                 <para>Possible values:
 166                         <constant>1712000</constant>,
 167                         <constant>5000000</constant>,
 168                         <constant>6000000</constant>,
 169                         <constant>7000000</constant>,
 170                         <constant>8000000</constant>,
 171                         <constant>10000000</constant>.
 172                 </para>
 173
 174                 <para>Notes:</para>
 175
 176                 <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para>
 177                 <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para>
 178                 <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth
 179                          for DVB-C depends on the symbol rate</para>
 180                 <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from
 181                         other parameters (DTV_ISDBT_SB_SEGMENT_IDX,
 182                         DTV_ISDBT_SB_SEGMENT_COUNT).</para>
 183                 <para>5) DVB-T supports 6, 7 and 8MHz.</para>
 184                 <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para>
 185         </section>
 186         <section id="DTV-INVERSION">
 187         <title><constant>DTV_INVERSION</constant></title>
 188         <para>The Inversion field can take one of these values:
 189         </para>
 190         <programlisting>
 191         typedef enum fe_spectral_inversion {
 192                 INVERSION_OFF,
 193                 INVERSION_ON,
 194                 INVERSION_AUTO
 195         } fe_spectral_inversion_t;
 196         </programlisting>
 197         <para>It indicates if spectral inversion should be presumed or not. In the automatic setting
 198         (<constant>INVERSION_AUTO</constant>) the hardware will try to figure out the correct setting by
 199         itself.
 200         </para>
 201         </section>
 202         <section id="DTV-DISEQC-MASTER">
 203         <title><constant>DTV_DISEQC_MASTER</constant></title>
 204         <para>Currently not implemented.</para>
 205         </section>
 206         <section id="DTV-SYMBOL-RATE">
 207         <title><constant>DTV_SYMBOL_RATE</constant></title>
 208         <para>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para>
 209         </section>
 210         <section id="DTV-INNER-FEC">
 211         <title><constant>DTV_INNER_FEC</constant></title>
 212         <para>Used cable/satellite transmissions. The acceptable values are:
 213         </para>
 214         <programlisting>
 215 typedef enum fe_code_rate {
 216         FEC_NONE = 0,
 217         FEC_1_2,
 218         FEC_2_3,
 219         FEC_3_4,
 220         FEC_4_5,
 221         FEC_5_6,
 222         FEC_6_7,
 223         FEC_7_8,
 224         FEC_8_9,
 225         FEC_AUTO,
 226         FEC_3_5,
 227         FEC_9_10,
 228         FEC_2_5,
 229 } fe_code_rate_t;
 230         </programlisting>
 231         <para>which correspond to error correction rates of 1/2, 2/3, etc.,
 232         no error correction or auto detection.</para>
 233         </section>
 234         <section id="DTV-VOLTAGE">
 235         <title><constant>DTV_VOLTAGE</constant></title>
 236         <para>The voltage is usually used with non-DiSEqC capable LNBs to switch
 237         the polarzation (horizontal/vertical). When using DiSEqC epuipment this
 238         voltage has to be switched consistently to the DiSEqC commands as
 239         described in the DiSEqC spec.</para>
 240         <programlisting>
 241                 typedef enum fe_sec_voltage {
 242                 SEC_VOLTAGE_13,
 243                 SEC_VOLTAGE_18
 244                 } fe_sec_voltage_t;
 245         </programlisting>
 246         </section>
 247         <section id="DTV-TONE">
 248         <title><constant>DTV_TONE</constant></title>
 249         <para>Currently not used.</para>
 250         </section>
 251         <section id="DTV-PILOT">
 252         <title><constant>DTV_PILOT</constant></title>
 253         <para>Sets DVB-S2 pilot</para>
 254         <section id="fe-pilot-t">
 255                 <title>fe_pilot type</title>
 256                 <programlisting>
 257 typedef enum fe_pilot {
 258         PILOT_ON,
 259         PILOT_OFF,
 260         PILOT_AUTO,
 261 } fe_pilot_t;
 262                 </programlisting>
 263                 </section>
 264         </section>
 265         <section id="DTV-ROLLOFF">
 266         <title><constant>DTV_ROLLOFF</constant></title>
 267                 <para>Sets DVB-S2 rolloff</para>
 268
 269         <section id="fe-rolloff-t">
 270                 <title>fe_rolloff type</title>
 271                 <programlisting>
 272 typedef enum fe_rolloff {
 273         ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */
 274         ROLLOFF_20,
 275         ROLLOFF_25,
 276         ROLLOFF_AUTO,
 277 } fe_rolloff_t;
 278                 </programlisting>
 279                 </section>
 280         </section>
 281         <section id="DTV-DISEQC-SLAVE-REPLY">
 282         <title><constant>DTV_DISEQC_SLAVE_REPLY</constant></title>
 283         <para>Currently not implemented.</para>
 284         </section>
 285         <section id="DTV-FE-CAPABILITY-COUNT">
 286         <title><constant>DTV_FE_CAPABILITY_COUNT</constant></title>
 287         <para>Currently not implemented.</para>
 288         </section>
 289         <section id="DTV-FE-CAPABILITY">
 290         <title><constant>DTV_FE_CAPABILITY</constant></title>
 291         <para>Currently not implemented.</para>
 292         </section>
 293         <section id="DTV-DELIVERY-SYSTEM">
 294                 <title><constant>DTV_DELIVERY_SYSTEM</constant></title>
 295                 <para>Specifies the type of Delivery system</para>
 296                 <section id="fe-delivery-system-t">
 297                 <title>fe_delivery_system type</title>
 298                 <para>Possible values: </para>
 299 <programlisting>
 300
 301 typedef enum fe_delivery_system {
 302         SYS_UNDEFINED,
 303         SYS_DVBC_ANNEX_A,
 304         SYS_DVBC_ANNEX_B,
 305         SYS_DVBT,
 306         SYS_DSS,
 307         SYS_DVBS,
 308         SYS_DVBS2,
 309         SYS_DVBH,
 310         SYS_ISDBT,
 311         SYS_ISDBS,
 312         SYS_ISDBC,
 313         SYS_ATSC,
 314         SYS_ATSCMH,
 315         SYS_DTMB,
 316         SYS_CMMB,
 317         SYS_DAB,
 318         SYS_DVBT2,
 319         SYS_TURBO,
 320         SYS_DVBC_ANNEX_C,
 321 } fe_delivery_system_t;
 322 </programlisting>
 323                 </section>
 324         </section>
 325         <section id="DTV-ISDBT-PARTIAL-RECEPTION">
 326                 <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title>
 327
 328                 <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether
 329                         the channel is in partial reception mode or not.</para>
 330
 331                 <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and
 332                         <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para>
 333
 334                 <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'
 335                         <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel
 336                         is consisting of one segment and layer or three segments and two layers.</para>
 337
 338                 <para>Possible values: 0, 1, -1 (AUTO)</para>
 339         </section>
 340         <section id="DTV-ISDBT-SOUND-BROADCASTING">
 341                 <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title>
 342
 343                 <para>This field represents whether the other DTV_ISDBT_*-parameters are
 344                         referring to an ISDB-T and an ISDB-Tsb channel. (See also
 345                         <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para>
 346
 347                 <para>Possible values: 0, 1, -1 (AUTO)</para>
 348         </section>
 349         <section id="DTV-ISDBT-SB-SUBCHANNEL-ID">
 350                 <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title>
 351
 352                 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
 353
 354                 <para>(Note of the author: This might not be the correct description of the
 355                         <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical
 356                         background needed to program a device)</para>
 357
 358                 <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
 359                         set of connected ISDB-Tsb channels. In this set of channels every
 360                         channel can be received independently. The number of connected
 361                         ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum
 362                         bandwidth available.</para>
 363
 364                 <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
 365                         broadcaster has several possibilities to put those channels in the
 366                         air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8
 367                         segments from position 1-8 to 5-13 or anything in between.</para>
 368
 369                 <para>The underlying layer of segments are subchannels: each segment is
 370                         consisting of several subchannels with a predefined IDs. A sub-channel
 371                         is used to help the demodulator to synchronize on the channel.</para>
 372
 373                 <para>An ISDB-T channel is always centered over all sub-channels. As for
 374                         the example above, in ISDB-Tsb it is no longer as simple as that.</para>
 375
 376                 <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the
 377                         sub-channel ID of the segment to be demodulated.</para>
 378
 379                 <para>Possible values: 0 .. 41, -1 (AUTO)</para>
 380         </section>
 381         <section id="DTV-ISDBT-SB-SEGMENT-IDX">
 382                 <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title>
 383                 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
 384                 <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be
 385                         demodulated for an ISDB-Tsb channel where several of them are
 386                         transmitted in the connected manner.</para>
 387                 <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para>
 388                 <para>Note: This value cannot be determined by an automatic channel search.</para>
 389         </section>
 390         <section id="DTV-ISDBT-SB-SEGMENT-COUNT">
 391                 <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title>
 392                 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
 393                 <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb
 394                         channels.</para>
 395                 <para>Possible values: 1 .. 13</para>
 396                 <para>Note: This value cannot be determined by an automatic channel search.</para>
 397         </section>
 398         <section id="isdb-hierq-layers">
 399                 <title><constant>DTV-ISDBT-LAYER*</constant> parameters</title>
 400                 <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
 401                         ISDB-T hierarchical layers can be decoded simultaneously. For that
 402                         reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.</para>
 403                 <para>ISDB-T has 3 hierarchical layers which each can use a part of the
 404                         available segments. The total number of segments over all layers has
 405                         to 13 in ISDB-T.</para>
 406                 <para>There are 3 parameter sets, for Layers A, B and C.</para>
 407                 <section id="DTV-ISDBT-LAYER-ENABLED">
 408                         <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title>
 409                         <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling
 410                                 layers in the decoding process. Setting all bits of
 411                                 <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be
 412                                 demodulated. This is the default.</para>
 413                         <para>If the channel is in the partial reception mode
 414                                 (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded
 415                                 independently of the other 12 segments. In that mode layer A has to
 416                                 have a <constant>SEGMENT_COUNT</constant> of 1.</para>
 417                         <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb
 418                                 according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled
 419                                 accordingly.</para>
 420                         <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para>
 421                         <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para>
 422                         <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para>
 423                         <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para>
 424                         <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para>
 425                 </section>
 426                 <section id="DTV-ISDBT-LAYER-FEC">
 427                         <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title>
 428                         <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para>
 429                 </section>
 430                 <section id="DTV-ISDBT-LAYER-MODULATION">
 431                         <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title>
 432                         <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para>
 433                         <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant>
 434                                 and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para>
 435                 </section>
 436                 <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT">
 437                         <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title>
 438                         <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para>
 439                         <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and
 440                                 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para>
 441                         <informaltable id="isdbt-layer_seg-cnt-table">
 442                                 <tgroup cols="6">
 443                                         <tbody>
 444                                                 <row>
 445                                                         <entry>PR</entry>
 446                                                         <entry>SB</entry>
 447                                                         <entry>Layer A width</entry>
 448                                                         <entry>Layer B width</entry>
 449                                                         <entry>Layer C width</entry>
 450                                                         <entry>total width</entry>
 451                                                 </row>
 452                                                 <row>
 453                                                         <entry>0</entry>
 454                                                         <entry>0</entry>
 455                                                         <entry>1 .. 13</entry>
 456                                                         <entry>1 .. 13</entry>
 457                                                         <entry>1 .. 13</entry>
 458                                                         <entry>13</entry>
 459                                                 </row>
 460                                                 <row>
 461                                                         <entry>1</entry>
 462                                                         <entry>0</entry>
 463                                                         <entry>1</entry>
 464                                                         <entry>1 .. 13</entry>
 465                                                         <entry>1 .. 13</entry>
 466                                                         <entry>13</entry>
 467                                                 </row>
 468                                                 <row>
 469                                                         <entry>0</entry>
 470                                                         <entry>1</entry>
 471                                                         <entry>1</entry>
 472                                                         <entry>0</entry>
 473                                                         <entry>0</entry>
 474                                                         <entry>1</entry>
 475                                                 </row>
 476                                                 <row>
 477                                                         <entry>1</entry>
 478                                                         <entry>1</entry>
 479                                                         <entry>1</entry>
 480                                                         <entry>2</entry>
 481                                                         <entry>0</entry>
 482                                                         <entry>13</entry>
 483                                                 </row>
 484                                         </tbody>
 485                                 </tgroup>
 486                         </informaltable>
 487                 </section>
 488                 <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING">
 489                         <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title>
 490                         <para>Valid values: 0, 1, 2, 4, -1 (AUTO)</para>
 491                         <para>when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.</para>
 492                         <para>Note: The real time interleaving length depends on the mode (fft-size). The values
 493                                 here are referring to what can be found in the TMCC-structure, as shown in the table below.</para>
 494                         <informaltable id="isdbt-layer-interleaving-table">
 495                                 <tgroup cols="4" align="center">
 496                                         <tbody>
 497                                                 <row>
 498                                                         <entry>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</entry>
 499                                                         <entry>Mode 1 (2K FFT)</entry>
 500                                                         <entry>Mode 2 (4K FFT)</entry>
 501                                                         <entry>Mode 3 (8K FFT)</entry>
 502                                                 </row>
 503                                                 <row>
 504                                                         <entry>0</entry>
 505                                                         <entry>0</entry>
 506                                                         <entry>0</entry>
 507                                                         <entry>0</entry>
 508                                                 </row>
 509                                                 <row>
 510                                                         <entry>1</entry>
 511                                                         <entry>4</entry>
 512                                                         <entry>2</entry>
 513                                                         <entry>1</entry>
 514                                                 </row>
 515                                                 <row>
 516                                                         <entry>2</entry>
 517                                                         <entry>8</entry>
 518                                                         <entry>4</entry>
 519                                                         <entry>2</entry>
 520                                                 </row>
 521                                                 <row>
 522                                                         <entry>4</entry>
 523                                                         <entry>16</entry>
 524                                                         <entry>8</entry>
 525                                                         <entry>4</entry>
 526                                                 </row>
 527                                         </tbody>
 528                                 </tgroup>
 529                         </informaltable>
 530                 </section>
 531                 <section id="DTV-ATSCMH-FIC-VER">
 532                         <title><constant>DTV_ATSCMH_FIC_VER</constant></title>
 533                         <para>Version number of the FIC (Fast Information Channel) signaling data.</para>
 534                         <para>FIC is used for relaying information to allow rapid service acquisition by the receiver.</para>
 535                         <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para>
 536                 </section>
 537                 <section id="DTV-ATSCMH-PARADE-ID">
 538                         <title><constant>DTV_ATSCMH_PARADE_ID</constant></title>
 539                         <para>Parade identification number</para>
 540                         <para>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</para>
 541                         <para>Possible values: 0, 1, 2, 3, ..., 126, 127</para>
 542                 </section>
 543                 <section id="DTV-ATSCMH-NOG">
 544                         <title><constant>DTV_ATSCMH_NOG</constant></title>
 545                         <para>Number of MH groups per MH subframe for a designated parade.</para>
 546                         <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para>
 547                 </section>
 548                 <section id="DTV-ATSCMH-TNOG">
 549                         <title><constant>DTV_ATSCMH_TNOG</constant></title>
 550                         <para>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</para>
 551                         <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para>
 552                 </section>
 553                 <section id="DTV-ATSCMH-SGN">
 554                         <title><constant>DTV_ATSCMH_SGN</constant></title>
 555                         <para>Start group number.</para>
 556                         <para>Possible values: 0, 1, 2, 3, ..., 14, 15</para>
 557                 </section>
 558                 <section id="DTV-ATSCMH-PRC">
 559                         <title><constant>DTV_ATSCMH_PRC</constant></title>
 560                         <para>Parade repetition cycle.</para>
 561                         <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para>
 562                 </section>
 563                 <section id="DTV-ATSCMH-RS-FRAME-MODE">
 564                         <title><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></title>
 565                         <para>RS frame mode.</para>
 566                         <para>Possible values are:</para>
 567                   <para id="atscmh-rs-frame-mode">
 568 <programlisting>
 569 typedef enum atscmh_rs_frame_mode {
 570         ATSCMH_RSFRAME_PRI_ONLY  = 0,
 571         ATSCMH_RSFRAME_PRI_SEC   = 1,
 572 } atscmh_rs_frame_mode_t;
 573 </programlisting>
 574                   </para>
 575                 </section>
 576                 <section id="DTV-ATSCMH-RS-FRAME-ENSEMBLE">
 577                         <title><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></title>
 578                         <para>RS frame ensemble.</para>
 579                         <para>Possible values are:</para>
 580                   <para id="atscmh-rs-frame-ensemble">
 581 <programlisting>
 582 typedef enum atscmh_rs_frame_ensemble {
 583         ATSCMH_RSFRAME_ENS_PRI   = 0,
 584         ATSCMH_RSFRAME_ENS_SEC   = 1,
 585 } atscmh_rs_frame_ensemble_t;
 586 </programlisting>
 587                   </para>
 588                 </section>
 589                 <section id="DTV-ATSCMH-RS-CODE-MODE-PRI">
 590                         <title><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></title>
 591                         <para>RS code mode (primary).</para>
 592                         <para>Possible values are:</para>
 593                   <para id="atscmh-rs-code-mode">
 594 <programlisting>
 595 typedef enum atscmh_rs_code_mode {
 596         ATSCMH_RSCODE_211_187    = 0,
 597         ATSCMH_RSCODE_223_187    = 1,
 598         ATSCMH_RSCODE_235_187    = 2,
 599 } atscmh_rs_code_mode_t;
 600 </programlisting>
 601                   </para>
 602                 </section>
 603                 <section id="DTV-ATSCMH-RS-CODE-MODE-SEC">
 604                         <title><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></title>
 605                         <para>RS code mode (secondary).</para>
 606                         <para>Possible values are:</para>
 607 <programlisting>
 608 typedef enum atscmh_rs_code_mode {
 609         ATSCMH_RSCODE_211_187    = 0,
 610         ATSCMH_RSCODE_223_187    = 1,
 611         ATSCMH_RSCODE_235_187    = 2,
 612 } atscmh_rs_code_mode_t;
 613 </programlisting>
 614                 </section>
 615                 <section id="DTV-ATSCMH-SCCC-BLOCK-MODE">
 616                         <title><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></title>
 617                         <para>Series Concatenated Convolutional Code Block Mode.</para>
 618                         <para>Possible values are:</para>
 619                   <para id="atscmh-sccc-block-mode">
 620 <programlisting>
 621 typedef enum atscmh_sccc_block_mode {
 622         ATSCMH_SCCC_BLK_SEP      = 0,
 623         ATSCMH_SCCC_BLK_COMB     = 1,
 624 } atscmh_sccc_block_mode_t;
 625 </programlisting>
 626                   </para>
 627                 </section>
 628                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-A">
 629                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></title>
 630                         <para>Series Concatenated Convolutional Code Rate.</para>
 631                         <para>Possible values are:</para>
 632                   <para id="atscmh-sccc-code-mode">
 633 <programlisting>
 634 typedef enum atscmh_sccc_code_mode {
 635         ATSCMH_SCCC_CODE_HLF     = 0,
 636         ATSCMH_SCCC_CODE_QTR     = 1,
 637 } atscmh_sccc_code_mode_t;
 638 </programlisting>
 639                   </para>
 640                 </section>
 641                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-B">
 642                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></title>
 643                         <para>Series Concatenated Convolutional Code Rate.</para>
 644                         <para>Possible values are:</para>
 645 <programlisting>
 646 typedef enum atscmh_sccc_code_mode {
 647         ATSCMH_SCCC_CODE_HLF     = 0,
 648         ATSCMH_SCCC_CODE_QTR     = 1,
 649 } atscmh_sccc_code_mode_t;
 650 </programlisting>
 651                 </section>
 652                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-C">
 653                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></title>
 654                         <para>Series Concatenated Convolutional Code Rate.</para>
 655                         <para>Possible values are:</para>
 656 <programlisting>
 657 typedef enum atscmh_sccc_code_mode {
 658         ATSCMH_SCCC_CODE_HLF     = 0,
 659         ATSCMH_SCCC_CODE_QTR     = 1,
 660 } atscmh_sccc_code_mode_t;
 661 </programlisting>
 662                 </section>
 663                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-D">
 664                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></title>
 665                         <para>Series Concatenated Convolutional Code Rate.</para>
 666                         <para>Possible values are:</para>
 667 <programlisting>
 668 typedef enum atscmh_sccc_code_mode {
 669         ATSCMH_SCCC_CODE_HLF     = 0,
 670         ATSCMH_SCCC_CODE_QTR     = 1,
 671 } atscmh_sccc_code_mode_t;
 672 </programlisting>
 673                 </section>
 674         </section>
 675         <section id="DTV-API-VERSION">
 676         <title><constant>DTV_API_VERSION</constant></title>
 677         <para>Returns the major/minor version of the DVB API</para>
 678         </section>
 679         <section id="DTV-CODE-RATE-HP">
 680         <title><constant>DTV_CODE_RATE_HP</constant></title>
 681         <para>Used on terrestrial transmissions. The acceptable values are:
 682         </para>
 683         <programlisting>
 684 typedef enum fe_code_rate {
 685         FEC_NONE = 0,
 686         FEC_1_2,
 687         FEC_2_3,
 688         FEC_3_4,
 689         FEC_4_5,
 690         FEC_5_6,
 691         FEC_6_7,
 692         FEC_7_8,
 693         FEC_8_9,
 694         FEC_AUTO,
 695         FEC_3_5,
 696         FEC_9_10,
 697 } fe_code_rate_t;
 698         </programlisting>
 699         </section>
 700         <section id="DTV-CODE-RATE-LP">
 701         <title><constant>DTV_CODE_RATE_LP</constant></title>
 702         <para>Used on terrestrial transmissions. The acceptable values are:
 703         </para>
 704         <programlisting>
 705 typedef enum fe_code_rate {
 706         FEC_NONE = 0,
 707         FEC_1_2,
 708         FEC_2_3,
 709         FEC_3_4,
 710         FEC_4_5,
 711         FEC_5_6,
 712         FEC_6_7,
 713         FEC_7_8,
 714         FEC_8_9,
 715         FEC_AUTO,
 716         FEC_3_5,
 717         FEC_9_10,
 718 } fe_code_rate_t;
 719         </programlisting>
 720         </section>
 721         <section id="DTV-GUARD-INTERVAL">
 722                 <title><constant>DTV_GUARD_INTERVAL</constant></title>
 723
 724                 <para>Possible values are:</para>
 725 <programlisting>
 726 typedef enum fe_guard_interval {
 727         GUARD_INTERVAL_1_32,
 728         GUARD_INTERVAL_1_16,
 729         GUARD_INTERVAL_1_8,
 730         GUARD_INTERVAL_1_4,
 731         GUARD_INTERVAL_AUTO,
 732         GUARD_INTERVAL_1_128,
 733         GUARD_INTERVAL_19_128,
 734         GUARD_INTERVAL_19_256,
 735         GUARD_INTERVAL_PN420,
 736         GUARD_INTERVAL_PN595,
 737         GUARD_INTERVAL_PN945,
 738 } fe_guard_interval_t;
 739 </programlisting>
 740
 741                 <para>Notes:</para>
 742                 <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will
 743                         try to find the correct guard interval (if capable) and will use TMCC to fill
 744                         in the missing parameters.</para>
 745                 <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para>
 746                 <para>3) DTMB specifies PN420, PN595 and PN945.</para>
 747         </section>
 748         <section id="DTV-TRANSMISSION-MODE">
 749                 <title><constant>DTV_TRANSMISSION_MODE</constant></title>
 750
 751                 <para>Specifies the number of carriers used by the standard</para>
 752
 753                 <para>Possible values are:</para>
 754 <programlisting>
 755 typedef enum fe_transmit_mode {
 756         TRANSMISSION_MODE_2K,
 757         TRANSMISSION_MODE_8K,
 758         TRANSMISSION_MODE_AUTO,
 759         TRANSMISSION_MODE_4K,
 760         TRANSMISSION_MODE_1K,
 761         TRANSMISSION_MODE_16K,
 762         TRANSMISSION_MODE_32K,
 763         TRANSMISSION_MODE_C1,
 764         TRANSMISSION_MODE_C3780,
 765 } fe_transmit_mode_t;
 766 </programlisting>
 767                 <para>Notes:</para>
 768                 <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
 769                         'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para>
 770
 771                 <para>2) If <constant>DTV_TRANSMISSION_MODE</constant> is set the <constant>TRANSMISSION_MODE_AUTO</constant> the
 772                         hardware will try to find the correct FFT-size (if capable) and will
 773                         use TMCC to fill in the missing parameters.</para>
 774                 <para>3) DVB-T specifies 2K and 8K as valid sizes.</para>
 775                 <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para>
 776                 <para>5) DTMB specifies C1 and C3780.</para>
 777         </section>
 778         <section id="DTV-HIERARCHY">
 779         <title><constant>DTV_HIERARCHY</constant></title>
 780         <para>Frontend hierarchy</para>
 781         <programlisting>
 782 typedef enum fe_hierarchy {
 783          HIERARCHY_NONE,
 784          HIERARCHY_1,
 785          HIERARCHY_2,
 786          HIERARCHY_4,
 787          HIERARCHY_AUTO
 788  } fe_hierarchy_t;
 789         </programlisting>
 790         </section>
 791         <section id="DTV-STREAM-ID">
 792         <title><constant>DTV_STREAM_ID</constant></title>
 793         <para>DVB-S2, DVB-T2 and ISDB-S support the transmission of several
 794               streams on a single transport stream.
 795               This property enables the DVB driver to handle substream filtering,
 796               when supported by the hardware.
 797               By default, substream filtering is disabled.
 798         </para><para>
 799               For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255.
 800         </para><para>
 801               For ISDB, the valid substream id range is from 1 to 65535.
 802         </para><para>
 803               To disable it, you should use the special macro NO_STREAM_ID_FILTER.
 804         </para><para>
 805               Note: any value outside the id range also disables filtering.
 806         </para>
 807         </section>
 808         <section id="DTV-DVBT2-PLP-ID-LEGACY">
 809                 <title><constant>DTV_DVBT2_PLP_ID_LEGACY</constant></title>
 810                 <para>Obsolete, replaced with DTV_STREAM_ID.</para>
 811         </section>
 812         <section id="DTV-ENUM-DELSYS">
 813                 <title><constant>DTV_ENUM_DELSYS</constant></title>
 814                 <para>A Multi standard frontend needs to advertise the delivery systems provided.
 815                         Applications need to enumerate the provided delivery systems, before using
 816                         any other operation with the frontend. Prior to it's introduction,
 817                         FE_GET_INFO was used to determine a frontend type. A frontend which
 818                         provides more than a single delivery system, FE_GET_INFO doesn't help much.
 819                         Applications which intends to use a multistandard frontend must enumerate
 820                         the delivery systems associated with it, rather than trying to use
 821                         FE_GET_INFO. In the case of a legacy frontend, the result is just the same
 822                         as with FE_GET_INFO, but in a more structured format </para>
 823         </section>
 824         <section id="DTV-INTERLEAVING">
 825         <title><constant>DTV_INTERLEAVING</constant></title>
 826         <para id="fe-interleaving">Interleaving mode</para>
 827         <programlisting>
 828 enum fe_interleaving {
 829         INTERLEAVING_NONE,
 830         INTERLEAVING_AUTO,
 831         INTERLEAVING_240,
 832         INTERLEAVING_720,
 833 };
 834         </programlisting>
 835         </section>
 836         <section id="DTV-LNA">
 837         <title><constant>DTV_LNA</constant></title>
 838         <para>Low-noise amplifier.</para>
 839         <para>Hardware might offer controllable LNA which can be set manually
 840                 using that parameter. Usually LNA could be found only from
 841                 terrestrial devices if at all.</para>
 842         <para>Possible values: 0, 1, LNA_AUTO</para>
 843         <para>0, LNA off</para>
 844         <para>1, LNA on</para>
 845         <para>use the special macro LNA_AUTO to set LNA auto</para>
 846         </section>
 847 </section>
 848
 849         <section id="frontend-stat-properties">
 850         <title>Frontend statistics indicators</title>
 851         <para>The values are returned via <constant>dtv_property.stat</constant>.
 852               If the property is supported, <constant>dtv_property.stat.len</constant> is bigger than zero.</para>
 853         <para>For most delivery systems, <constant>dtv_property.stat.len</constant>
 854               will be 1 if the stats is supported, and the properties will
 855               return a single value for each parameter.</para>
 856         <para>It should be noticed, however, that new OFDM delivery systems
 857               like ISDB can use different modulation types for each group of
 858               carriers. On such standards, up to 3 groups of statistics can be
 859               provided, and <constant>dtv_property.stat.len</constant> is updated
 860               to reflect the "global" metrics, plus one metric per each carrier
 861               group (called "layer" on ISDB).</para>
 862         <para>So, in order to be consistent with other delivery systems, the first
 863               value at <link linkend="dtv-stats"><constant>dtv_property.stat.dtv_stats</constant></link>
 864               array refers to the global metric. The other elements of the array
 865               represent each layer, starting from layer A(index 1),
 866               layer B (index 2) and so on.</para>
 867         <para>The number of filled elements are stored at <constant>dtv_property.stat.len</constant>.</para>
 868         <para>Each element of the <constant>dtv_property.stat.dtv_stats</constant> array consists on two elements:</para>
 869         <itemizedlist mark='opencircle'>
 870                 <listitem><para><constant>svalue</constant> or <constant>uvalue</constant>, where
 871                         <constant>svalue</constant> is for signed values of the measure (dB measures)
 872                         and <constant>uvalue</constant> is for unsigned values (counters, relative scale)</para></listitem>
 873                 <listitem><para><constant>scale</constant> - Scale for the value. It can be:</para>
 874                         <itemizedlist mark='bullet' id="fecap-scale-params">
 875                                 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - The parameter is supported by the frontend, but it was not possible to collect it (could be a transitory or permanent condition)</para></listitem>
 876                                 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - parameter is a signed value, measured in 1/1000 dB</para></listitem>
 877                                 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - parameter is a unsigned value, where 0 means 0% and 65535 means 100%.</para></listitem>
 878                                 <listitem><para><constant>FE_SCALE_COUNTER</constant> - parameter is a unsigned value that counts the occurrence of an event, like bit error, block error, or lapsed time.</para></listitem>
 879                         </itemizedlist>
 880                 </listitem>
 881         </itemizedlist>
 882         <section id="DTV-STAT-SIGNAL-STRENGTH">
 883                 <title><constant>DTV_STAT_SIGNAL_STRENGTH</constant></title>
 884                 <para>Indicates the signal strength level at the analog part of the tuner or of the demod.</para>
 885                 <para>Possible scales for this metric are:</para>
 886                 <itemizedlist mark='bullet'>
 887                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 888                         <listitem><para><constant>FE_SCALE_DECIBEL</constant> - signal strength is in 0.001 dBm units, power measured in miliwatts. This value is generally negative.</para></listitem>
 889                         <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for power (actually, 0 to 65535).</para></listitem>
 890                 </itemizedlist>
 891         </section>
 892         <section id="DTV-STAT-CNR">
 893                 <title><constant>DTV_STAT_CNR</constant></title>
 894                 <para>Indicates the Signal to Noise ratio for the main carrier.</para>
 895                 <para>Possible scales for this metric are:</para>
 896                 <itemizedlist mark='bullet'>
 897                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 898                         <listitem><para><constant>FE_SCALE_DECIBEL</constant> - Signal/Noise ratio is in 0.001 dB units.</para></listitem>
 899                         <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for Signal/Noise (actually, 0 to 65535).</para></listitem>
 900                 </itemizedlist>
 901         </section>
 902         <section id="DTV-STAT-PRE-ERROR-BIT-COUNT">
 903                 <title><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></title>
 904                 <para>Measures the number of bit errors before the forward error correction (FEC) on the inner coding block (before Viterbi, LDPC or other inner code).</para>
 905                 <para>This measure is taken during the same interval as <constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant>.</para>
 906                 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by
 907                 <link linkend="DTV-STAT-PRE-TOTAL-BIT-COUNT"><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></link>.</para>
 908                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 909                       The frontend may reset it when a channel/transponder is tuned.</para>
 910                 <para>Possible scales for this metric are:</para>
 911                 <itemizedlist mark='bullet'>
 912                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 913                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted before the inner coding.</para></listitem>
 914                 </itemizedlist>
 915         </section>
 916         <section id="DTV-STAT-PRE-TOTAL-BIT-COUNT">
 917                 <title><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></title>
 918                 <para>Measures the amount of bits received before the inner code block, during the same period as
 919                 <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link> measurement was taken.</para>
 920                 <para>It should be noticed that this measurement can be smaller than the total amount of bits on the transport stream,
 921                       as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para>
 922                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 923                       The frontend may reset it when a channel/transponder is tuned.</para>
 924                 <para>Possible scales for this metric are:</para>
 925                 <itemizedlist mark='bullet'>
 926                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 927                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring
 928                                  <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link>.</para></listitem>
 929                 </itemizedlist>
 930         </section>
 931         <section id="DTV-STAT-POST-ERROR-BIT-COUNT">
 932                 <title><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></title>
 933                 <para>Measures the number of bit errors after the forward error correction (FEC) done by inner code block (after Viterbi, LDPC or other inner code).</para>
 934                 <para>This measure is taken during the same interval as <constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant>.</para>
 935                 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by
 936                 <link linkend="DTV-STAT-POST-TOTAL-BIT-COUNT"><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></link>.</para>
 937                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 938                       The frontend may reset it when a channel/transponder is tuned.</para>
 939                 <para>Possible scales for this metric are:</para>
 940                 <itemizedlist mark='bullet'>
 941                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 942                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted after the inner coding.</para></listitem>
 943                 </itemizedlist>
 944         </section>
 945         <section id="DTV-STAT-POST-TOTAL-BIT-COUNT">
 946                 <title><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></title>
 947                 <para>Measures the amount of bits received after the inner coding, during the same period as
 948                 <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link> measurement was taken.</para>
 949                 <para>It should be noticed that this measurement can be smaller than the total amount of bits on the transport stream,
 950                       as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para>
 951                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 952                       The frontend may reset it when a channel/transponder is tuned.</para>
 953                 <para>Possible scales for this metric are:</para>
 954                 <itemizedlist mark='bullet'>
 955                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 956                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring
 957                                  <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link>.</para></listitem>
 958                 </itemizedlist>
 959         </section>
 960         <section id="DTV-STAT-ERROR-BLOCK-COUNT">
 961                 <title><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></title>
 962                 <para>Measures the number of block errors after the outer forward error correction coding (after Reed-Solomon or other outer code).</para>
 963                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 964                       The frontend may reset it when a channel/transponder is tuned.</para>
 965                 <para>Possible scales for this metric are:</para>
 966                 <itemizedlist mark='bullet'>
 967                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 968                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error blocks counted after the outer coding.</para></listitem>
 969                 </itemizedlist>
 970         </section>
 971         <section id="DTV-STAT-TOTAL-BLOCK-COUNT">
 972                 <title><constant>DTV-STAT_TOTAL_BLOCK_COUNT</constant></title>
 973                 <para>Measures the total number of blocks received during the same period as
 974                 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> measurement was taken.</para>
 975                 <para>It can be used to calculate the PER indicator, by dividing
 976                 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>
 977                 by <link linkend="DTV-STAT-TOTAL-BLOCK-COUNT"><constant>DTV-STAT-TOTAL-BLOCK-COUNT</constant></link>.</para>
 978                 <para>Possible scales for this metric are:</para>
 979                 <itemizedlist mark='bullet'>
 980                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 981                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of blocks counted while measuring
 982                         <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>.</para></listitem>
 983                 </itemizedlist>
 984         </section>
 985         </section>
 986
 987         <section id="frontend-property-terrestrial-systems">
 988         <title>Properties used on terrestrial delivery systems</title>
 989                 <section id="dvbt-params">
 990                         <title>DVB-T delivery system</title>
 991                         <para>The following parameters are valid for DVB-T:</para>
 992                         <itemizedlist mark='opencircle'>
 993                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
 994                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
 995                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
 996                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
 997                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
 998                                 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
 999                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1000                                 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1001                                 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
1002                                 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
1003                                 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1004                                 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1005                                 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
1006                                 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1007                         </itemizedlist>
1008                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1009                 </section>
1010                 <section id="dvbt2-params">
1011                         <title>DVB-T2 delivery system</title>
1012                         <para>DVB-T2 support is currently in the early stages
1013                         of development, so expect that this section maygrow and become
1014                         more detailed with time.</para>
1015                 <para>The following parameters are valid for DVB-T2:</para>
1016                 <itemizedlist mark='opencircle'>
1017                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1018                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1019                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1020                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1021                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1022                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1023                         <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1024                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1025                         <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
1026                         <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
1027                         <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1028                         <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1029                         <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
1030                         <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem>
1031                         <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1032                 </itemizedlist>
1033                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1034                 </section>
1035                 <section id="isdbt">
1036                 <title>ISDB-T delivery system</title>
1037                 <para>This ISDB-T/ISDB-Tsb API extension should reflect all information
1038                         needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible
1039                         that some very sophisticated devices won't need certain parameters to
1040                         tune.</para>
1041                 <para>The information given here should help application writers to know how
1042                         to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para>
1043                 <para>The details given here about ISDB-T and ISDB-Tsb are just enough to
1044                         basically show the dependencies between the needed parameter values,
1045                         but surely some information is left out. For more detailed information
1046                         see the following documents:</para>
1047                 <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial
1048                         Television Broadcasting" and</para>
1049                 <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial
1050                         Television Broadcasting".</para>
1051                 <para>In order to understand the ISDB specific parameters,
1052                         one has to have some knowledge the channel structure in
1053                         ISDB-T and ISDB-Tsb. I.e. it has to be known to
1054                         the reader that an ISDB-T channel consists of 13 segments,
1055                         that it can have up to 3 layer sharing those segments,
1056                         and things like that.</para>
1057                 <para>The following parameters are valid for ISDB-T:</para>
1058                 <itemizedlist mark='opencircle'>
1059                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1060                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1061                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1062                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1063                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1064                         <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1065                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1066                         <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1067                         <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1068                         <listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem>
1069                         <listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem>
1070                         <listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem>
1071                         <listitem><para><link linkend="DTV-ISDBT-SB-SUBCHANNEL-ID"><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></link></para></listitem>
1072                         <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-IDX"><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></link></para></listitem>
1073                         <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-COUNT"><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></link></para></listitem>
1074                         <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERA_FEC</constant></link></para></listitem>
1075                         <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERA_MODULATION</constant></link></para></listitem>
1076                         <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant></link></para></listitem>
1077                         <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant></link></para></listitem>
1078                         <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERB_FEC</constant></link></para></listitem>
1079                         <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERB_MODULATION</constant></link></para></listitem>
1080                         <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant></link></para></listitem>
1081                         <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant></link></para></listitem>
1082                         <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERC_FEC</constant></link></para></listitem>
1083                         <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERC_MODULATION</constant></link></para></listitem>
1084                         <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant></link></para></listitem>
1085                         <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant></link></para></listitem>
1086                 </itemizedlist>
1087                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1088                 </section>
1089                 <section id="atsc-params">
1090                         <title>ATSC delivery system</title>
1091                         <para>The following parameters are valid for ATSC:</para>
1092                         <itemizedlist mark='opencircle'>
1093                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1094                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1095                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1096                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1097                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1098                                 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1099                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1100                         </itemizedlist>
1101                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1102                 </section>
1103                 <section id="atscmh-params">
1104                         <title>ATSC-MH delivery system</title>
1105                         <para>The following parameters are valid for ATSC-MH:</para>
1106                         <itemizedlist mark='opencircle'>
1107                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1108                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1109                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1110                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1111                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1112                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1113                                 <listitem><para><link linkend="DTV-ATSCMH-FIC-VER"><constant>DTV_ATSCMH_FIC_VER</constant></link></para></listitem>
1114                                 <listitem><para><link linkend="DTV-ATSCMH-PARADE-ID"><constant>DTV_ATSCMH_PARADE_ID</constant></link></para></listitem>
1115                                 <listitem><para><link linkend="DTV-ATSCMH-NOG"><constant>DTV_ATSCMH_NOG</constant></link></para></listitem>
1116                                 <listitem><para><link linkend="DTV-ATSCMH-TNOG"><constant>DTV_ATSCMH_TNOG</constant></link></para></listitem>
1117                                 <listitem><para><link linkend="DTV-ATSCMH-SGN"><constant>DTV_ATSCMH_SGN</constant></link></para></listitem>
1118                                 <listitem><para><link linkend="DTV-ATSCMH-PRC"><constant>DTV_ATSCMH_PRC</constant></link></para></listitem>
1119                                 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-MODE"><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></link></para></listitem>
1120                                 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-ENSEMBLE"><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></link></para></listitem>
1121                                 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-PRI"><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></link></para></listitem>
1122                                 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-SEC"><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></link></para></listitem>
1123                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-BLOCK-MODE"><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></link></para></listitem>
1124                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-A"><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></link></para></listitem>
1125                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-B"><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></link></para></listitem>
1126                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-C"><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></link></para></listitem>
1127                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-D"><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></link></para></listitem>
1128                         </itemizedlist>
1129                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1130                 </section>
1131                 <section id="dtmb-params">
1132                         <title>DTMB delivery system</title>
1133                         <para>The following parameters are valid for DTMB:</para>
1134                         <itemizedlist mark='opencircle'>
1135                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1136                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1137                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1138                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1139                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1140                                 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1141                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1142                                 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1143                                 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1144                                 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1145                                 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1146                                 <listitem><para><link linkend="DTV-INTERLEAVING"><constant>DTV_INTERLEAVING</constant></link></para></listitem>
1147                                 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1148                         </itemizedlist>
1149                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1150                 </section>
1151         </section>
1152         <section id="frontend-property-cable-systems">
1153         <title>Properties used on cable delivery systems</title>
1154         <section id="dvbc-params">
1155                 <title>DVB-C delivery system</title>
1156                 <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para>
1157                 <para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para>
1158                 <para>The following parameters are valid for DVB-C Annex A/C:</para>
1159                 <itemizedlist mark='opencircle'>
1160                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1161                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1162                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1163                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1164                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1165                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1166                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1167                         <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
1168                         <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1169                         <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1170                 </itemizedlist>
1171                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1172         </section>
1173         <section id="dvbc-annex-b-params">
1174                 <title>DVB-C Annex B delivery system</title>
1175                 <para>The DVB-C Annex-B is only used on a few Countries like the United States.</para>
1176                 <para>The following parameters are valid for DVB-C Annex B:</para>
1177                 <itemizedlist mark='opencircle'>
1178                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1179                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1180                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1181                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1182                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1183                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1184                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1185                         <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1186                 </itemizedlist>
1187                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1188         </section>
1189         </section>
1190         <section id="frontend-property-satellital-systems">
1191         <title>Properties used on satellital delivery systems</title>
1192         <section id="dvbs-params">
1193                 <title>DVB-S delivery system</title>
1194                 <para>The following parameters are valid for DVB-S:</para>
1195                 <itemizedlist mark='opencircle'>
1196                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1197                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1198                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1199                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1200                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1201                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1202                         <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
1203                         <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1204                         <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
1205                         <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem>
1206                 </itemizedlist>
1207                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1208                 <para>Future implementations might add those two missing parameters:</para>
1209                 <itemizedlist mark='opencircle'>
1210                         <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem>
1211                         <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem>
1212                 </itemizedlist>
1213         </section>
1214         <section id="dvbs2-params">
1215                 <title>DVB-S2 delivery system</title>
1216                 <para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para>
1217                 <itemizedlist mark='opencircle'>
1218                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1219                         <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem>
1220                         <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem>
1221                         <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem>
1222                 </itemizedlist>
1223                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1224         </section>
1225         <section id="turbo-params">
1226                 <title>Turbo code delivery system</title>
1227                 <para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para>
1228                 <itemizedlist mark='opencircle'>
1229                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1230                 </itemizedlist>
1231         </section>
1232         <section id="isdbs-params">
1233                 <title>ISDB-S delivery system</title>
1234                 <para>The following parameters are valid for ISDB-S:</para>
1235                 <itemizedlist mark='opencircle'>
1236                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1237                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1238                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1239                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1240                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1241                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1242                         <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
1243                         <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1244                         <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
1245                         <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem>
1246                 </itemizedlist>
1247         </section>
1248         </section>
1249 </section>