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<section id= "FE_GET_SET_PROPERTY" >
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<title > <constant > FE_GET_PROPERTY/FE_SET_PROPERTY</constant> </title>
<para > This section describes the DVB version 5 extention of the DVB-API, also
called "S2API", as this API were added to provide support for DVB-S2. It was
designed to be able to replace the old frontend API. Yet, the DISEQC and
the capability ioctls weren't implemented yet via the new way.</para>
<para > The typical usage for the <constant > FE_GET_PROPERTY/FE_SET_PROPERTY</constant>
API is to replace the ioctl's were the <link linkend= "dvb-frontend-parameters" >
struct <constant > dvb_frontend_parameters</constant> </link> were used.</para>
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<section id= "dtv-property" >
<title > DTV property type</title>
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<programlisting >
/* Reserved fields should be set to 0 */
struct dtv_property {
__u32 cmd;
union {
__u32 data;
struct {
__u8 data[32];
__u32 len;
__u32 reserved1[3];
void *reserved2;
} buffer;
} u;
int result;
} __attribute__ ((packed));
/* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */
#define DTV_IOCTL_MAX_MSGS 64
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</programlisting>
</section>
<section id= "dtv-properties" >
<title > DTV properties type</title>
<programlisting >
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struct dtv_properties {
__u32 num;
struct dtv_property *props;
};
</programlisting>
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</section>
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<section id= "FE_GET_PROPERTY" >
<title > FE_GET_PROPERTY</title>
<para > DESCRIPTION
</para>
<informaltable > <tgroup cols= "1" > <tbody > <row > <entry
align="char">
<para > This ioctl call returns one or more frontend properties. This call only
requires read-only access to the device.</para>
</entry>
</row> </tbody> </tgroup> </informaltable>
<para > SYNOPSIS
</para>
<informaltable > <tgroup cols= "1" > <tbody > <row > <entry
align="char">
<para > int ioctl(int fd, int request = <link linkend= "FE_GET_PROPERTY" > FE_GET_PROPERTY</link> ,
dtv_properties ⋆ props);</para>
</entry>
</row> </tbody> </tgroup> </informaltable>
<para > PARAMETERS
</para>
<informaltable > <tgroup cols= "2" > <tbody > <row > <entry align= "char" >
<para > int fd</para>
</entry> <entry
align="char">
<para > File descriptor returned by a previous call to open().</para>
</entry>
</row> <row > <entry
align="char">
<para > int num</para>
</entry> <entry
align="char">
<para > Equals <link linkend= "FE_GET_PROPERTY" > FE_GET_PROPERTY</link> for this command.</para>
</entry>
</row> <row > <entry
align="char">
<para > struct dtv_property *props</para>
</entry> <entry
align="char">
<para > Points to the location where the front-end property commands are stored.</para>
</entry>
</row> </tbody> </tgroup> </informaltable>
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&return-value-dvb;
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<informaltable > <tgroup cols= "2" > <tbody > <row >
<entry align= "char" > <para > EOPNOTSUPP</para> </entry>
<entry align= "char" > <para > Property type not supported.</para> </entry>
</row> </tbody> </tgroup> </informaltable>
</section>
<section id= "FE_SET_PROPERTY" >
<title > FE_SET_PROPERTY</title>
<para > DESCRIPTION
</para>
<informaltable > <tgroup cols= "1" > <tbody > <row > <entry
align="char">
<para > This ioctl call sets one or more frontend properties. This call only
requires read-only access to the device.</para>
</entry>
</row> </tbody> </tgroup> </informaltable>
<para > SYNOPSIS
</para>
<informaltable > <tgroup cols= "1" > <tbody > <row > <entry
align="char">
<para > int ioctl(int fd, int request = <link linkend= "FE_SET_PROPERTY" > FE_SET_PROPERTY</link> ,
dtv_properties ⋆ props);</para>
</entry>
</row> </tbody> </tgroup> </informaltable>
<para > PARAMETERS
</para>
<informaltable > <tgroup cols= "2" > <tbody > <row > <entry align= "char" >
<para > int fd</para>
</entry> <entry
align="char">
<para > File descriptor returned by a previous call to open().</para>
</entry>
</row> <row > <entry
align="char">
<para > int num</para>
</entry> <entry
align="char">
<para > Equals <link linkend= "FE_SET_PROPERTY" > FE_SET_PROPERTY</link> for this command.</para>
</entry>
</row> <row > <entry
align="char">
<para > struct dtv_property *props</para>
</entry> <entry
align="char">
<para > Points to the location where the front-end property commands are stored.</para>
</entry>
</row> </tbody> </tgroup> </informaltable>
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&return-value-dvb;
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<informaltable > <tgroup cols= "2" > <tbody > <row >
<entry align= "char" > <para > EOPNOTSUPP</para> </entry>
<entry align= "char" > <para > Property type not supported.</para> </entry>
</row> </tbody> </tgroup> </informaltable>
</section>
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<section >
<title > Property types</title>
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<para >
On <link linkend= "FE_GET_PROPERTY" > FE_GET_PROPERTY</link> /<link linkend= "FE_SET_PROPERTY" > FE_SET_PROPERTY</link> ,
the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to
get/set up to 64 properties. The actual meaning of each property is described on the next sections.
</para>
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<para > The available frontend property types are shown on the next section.</para>
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</section>
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<section id= "fe_property_parameters" >
<title > Digital TV property parameters</title>
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<section id= "DTV-UNDEFINED" >
<title > <constant > DTV_UNDEFINED</constant> </title>
<para > Used internally. A GET/SET operation for it won't change or return anything.</para>
</section>
<section id= "DTV-TUNE" >
<title > <constant > DTV_TUNE</constant> </title>
<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>
</section>
<section id= "DTV-CLEAR" >
<title > <constant > DTV_CLEAR</constant> </title>
<para > Reset a cache of data specific to the frontend here. This does not effect hardware.</para>
</section>
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<section id= "DTV-FREQUENCY" >
<title > <constant > DTV_FREQUENCY</constant> </title>
<para > Central frequency of the channel, in HZ.</para>
<para > Notes:</para>
<para > 1)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
E.g. a valid frequncy could be 474143 kHz. The stepping is bound to the bandwidth of
the channel which is 6MHz.</para>
<para > 2)As in ISDB-Tsb the channel consists of only one or three segments the
frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
central frequency of the channel is expected.</para>
</section>
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<section id= "DTV-MODULATION" >
<title > <constant > DTV_MODULATION</constant> </title>
<para > Specifies the frontend modulation type for cable and satellite types. The modulation can be one of the types bellow:</para>
<programlisting >
typedef enum fe_modulation {
QPSK,
QAM_16,
QAM_32,
QAM_64,
QAM_128,
QAM_256,
QAM_AUTO,
VSB_8,
VSB_16,
PSK_8,
APSK_16,
APSK_32,
DQPSK,
} fe_modulation_t;
</programlisting>
</section>
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<section id= "DTV-BANDWIDTH-HZ" >
<title > <constant > DTV_BANDWIDTH_HZ</constant> </title>
<para > Bandwidth for the channel, in HZ.</para>
<para > Possible values:
<constant > 1712000</constant> ,
<constant > 5000000</constant> ,
<constant > 6000000</constant> ,
<constant > 7000000</constant> ,
<constant > 8000000</constant> ,
<constant > 10000000</constant> .
</para>
<para > Notes:</para>
<para > 1) For ISDB-T it should be always 6000000Hz (6MHz)</para>
<para > 2) For ISDB-Tsb it can vary depending on the number of connected segments</para>
<para > 3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth
for DVB-C depends on the symbol rate</para>
<para > 4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from
other parameters (DTV_ISDBT_SB_SEGMENT_IDX,
DTV_ISDBT_SB_SEGMENT_COUNT).</para>
<para > 5) DVB-T supports 6, 7 and 8MHz.</para>
<para > 6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para>
</section>
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<section id= "DTV-INVERSION" >
<title > <constant > DTV_INVERSION</constant> </title>
<para > The Inversion field can take one of these values:
</para>
<programlisting >
typedef enum fe_spectral_inversion {
INVERSION_OFF,
INVERSION_ON,
INVERSION_AUTO
} fe_spectral_inversion_t;
</programlisting>
<para > It indicates if spectral inversion should be presumed or not. In the automatic setting
(<constant > INVERSION_AUTO</constant> ) the hardware will try to figure out the correct setting by
itself.
</para>
</section>
<section id= "DTV-DISEQC-MASTER" >
<title > <constant > DTV_DISEQC_MASTER</constant> </title>
<para > Currently not implemented.</para>
</section>
<section id= "DTV-SYMBOL-RATE" >
<title > <constant > DTV_SYMBOL_RATE</constant> </title>
<para > Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para>
</section>
<section id= "DTV-INNER-FEC" >
<title > <constant > DTV_INNER_FEC</constant> </title>
<para > Used cable/satellite transmissions. The acceptable values are:
</para>
<programlisting >
typedef enum fe_code_rate {
FEC_NONE = 0,
FEC_1_2,
FEC_2_3,
FEC_3_4,
FEC_4_5,
FEC_5_6,
FEC_6_7,
FEC_7_8,
FEC_8_9,
FEC_AUTO,
FEC_3_5,
FEC_9_10,
} fe_code_rate_t;
</programlisting>
<para > which correspond to error correction rates of 1/2, 2/3, etc.,
no error correction or auto detection.</para>
</section>
<section id= "DTV-VOLTAGE" >
<title > <constant > DTV_VOLTAGE</constant> </title>
<para > The voltage is usually used with non-DiSEqC capable LNBs to switch
the polarzation (horizontal/vertical). When using DiSEqC epuipment this
voltage has to be switched consistently to the DiSEqC commands as
described in the DiSEqC spec.</para>
<programlisting >
typedef enum fe_sec_voltage {
SEC_VOLTAGE_13,
SEC_VOLTAGE_18
} fe_sec_voltage_t;
</programlisting>
</section>
<section id= "DTV-TONE" >
<title > <constant > DTV_TONE</constant> </title>
<para > Currently not used.</para>
</section>
<section id= "DTV-PILOT" >
<title > <constant > DTV_PILOT</constant> </title>
<para > Sets DVB-S2 pilot</para>
<section id= "fe-pilot-t" >
<title > fe_pilot type</title>
<programlisting >
typedef enum fe_pilot {
PILOT_ON,
PILOT_OFF,
PILOT_AUTO,
} fe_pilot_t;
</programlisting>
</section>
</section>
<section id= "DTV-ROLLOFF" >
<title > <constant > DTV_ROLLOFF</constant> </title>
<para > Sets DVB-S2 rolloff</para>
<section id= "fe-rolloff-t" >
<title > fe_rolloff type</title>
<programlisting >
typedef enum fe_rolloff {
ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */
ROLLOFF_20,
ROLLOFF_25,
ROLLOFF_AUTO,
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ROLLOFF_15, /* DVB-C Annex A */
ROLLOFF_13, /* DVB-C Annex C */
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} fe_rolloff_t;
</programlisting>
</section>
</section>
<section id= "DTV-DISEQC-SLAVE-REPLY" >
<title > <constant > DTV_DISEQC_SLAVE_REPLY</constant> </title>
<para > Currently not implemented.</para>
</section>
<section id= "DTV-FE-CAPABILITY-COUNT" >
<title > <constant > DTV_FE_CAPABILITY_COUNT</constant> </title>
<para > Currently not implemented.</para>
</section>
<section id= "DTV-FE-CAPABILITY" >
<title > <constant > DTV_FE_CAPABILITY</constant> </title>
<para > Currently not implemented.</para>
</section>
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<section id= "DTV-DELIVERY-SYSTEM" >
<title > <constant > DTV_DELIVERY_SYSTEM</constant> </title>
<para > Specifies the type of Delivery system</para>
<section id= "fe-delivery-system-t" >
<title > fe_delivery_system type</title>
<para > Possible values: </para>
<programlisting >
typedef enum fe_delivery_system {
SYS_UNDEFINED,
SYS_DVBC_ANNEX_AC,
SYS_DVBC_ANNEX_B,
SYS_DVBT,
SYS_DSS,
SYS_DVBS,
SYS_DVBS2,
SYS_DVBH,
SYS_ISDBT,
SYS_ISDBS,
SYS_ISDBC,
SYS_ATSC,
SYS_ATSCMH,
SYS_DMBTH,
SYS_CMMB,
SYS_DAB,
SYS_DVBT2,
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SYS_TURBO,
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} fe_delivery_system_t;
</programlisting>
</section>
</section>
<section id= "DTV-ISDBT-PARTIAL-RECEPTION" >
<title > <constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> </title>
<para > If <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether
the channel is in partial reception mode or not.</para>
<para > If '1' <constant > DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and
<constant > DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para>
<para > If in addition <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'
<constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel
is consisting of one segment and layer or three segments and two layers.</para>
<para > Possible values: 0, 1, -1 (AUTO)</para>
</section>
<section id= "DTV-ISDBT-SOUND-BROADCASTING" >
<title > <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> </title>
<para > This field represents whether the other DTV_ISDBT_*-parameters are
referring to an ISDB-T and an ISDB-Tsb channel. (See also
<constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> ).</para>
<para > Possible values: 0, 1, -1 (AUTO)</para>
</section>
<section id= "DTV-ISDBT-SB-SUBCHANNEL-ID" >
<title > <constant > DTV_ISDBT_SB_SUBCHANNEL_ID</constant> </title>
<para > This field only applies if <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
<para > (Note of the author: This might not be the correct description of the
<constant > SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical
background needed to program a device)</para>
<para > An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
set of connected ISDB-Tsb channels. In this set of channels every
channel can be received independently. The number of connected
ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum
bandwidth available.</para>
<para > Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
broadcaster has several possibilities to put those channels in the
air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8
segments from position 1-8 to 5-13 or anything in between.</para>
<para > The underlying layer of segments are subchannels: each segment is
consisting of several subchannels with a predefined IDs. A sub-channel
is used to help the demodulator to synchronize on the channel.</para>
<para > An ISDB-T channel is always centered over all sub-channels. As for
the example above, in ISDB-Tsb it is no longer as simple as that.</para>
<para > <constant > The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the
sub-channel ID of the segment to be demodulated.</para>
<para > Possible values: 0 .. 41, -1 (AUTO)</para>
</section>
<section id= "DTV-ISDBT-SB-SEGMENT-IDX" >
<title > <constant > DTV_ISDBT_SB_SEGMENT_IDX</constant> </title>
<para > This field only applies if <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
<para > <constant > DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be
demodulated for an ISDB-Tsb channel where several of them are
transmitted in the connected manner.</para>
<para > Possible values: 0 .. <constant > DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para>
<para > Note: This value cannot be determined by an automatic channel search.</para>
</section>
<section id= "DTV-ISDBT-SB-SEGMENT-COUNT" >
<title > <constant > DTV_ISDBT_SB_SEGMENT_COUNT</constant> </title>
<para > This field only applies if <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
<para > <constant > DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb
channels.</para>
<para > Possible values: 1 .. 13</para>
<para > Note: This value cannot be determined by an automatic channel search.</para>
</section>
<section id= "isdb-hierq-layers" >
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<title > <constant > DTV-ISDBT-LAYER*</constant> parameters</title>
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<para > ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
ISDB-T hierarchical layers can be decoded simultaneously. For that
reason a ISDB-T demodulator has 3 viterbi and 3 reed-solomon-decoders.</para>
<para > ISDB-T has 3 hierarchical layers which each can use a part of the
available segments. The total number of segments over all layers has
to 13 in ISDB-T.</para>
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<para > There are 3 parameter sets, for Layers A, B and C.</para>
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<section id= "DTV-ISDBT-LAYER-ENABLED" >
<title > <constant > DTV_ISDBT_LAYER_ENABLED</constant> </title>
<para > Hierarchical reception in ISDB-T is achieved by enabling or disabling
layers in the decoding process. Setting all bits of
<constant > DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be
demodulated. This is the default.</para>
<para > If the channel is in the partial reception mode
(<constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded
independently of the other 12 segments. In that mode layer A has to
have a <constant > SEGMENT_COUNT</constant> of 1.</para>
<para > In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb
according to <constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> . <constant > SEGMENT_COUNT</constant> must be filled
accordingly.</para>
<para > Possible values: 0x1, 0x2, 0x4 (|-able)</para>
<para > <constant > DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para>
<para > <constant > DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para>
<para > <constant > DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para>
<para > <constant > DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para>
</section>
<section id= "DTV-ISDBT-LAYER-FEC" >
<title > <constant > DTV_ISDBT_LAYER*_FEC</constant> </title>
<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>
</section>
<section id= "DTV-ISDBT-LAYER-MODULATION" >
<title > <constant > DTV_ISDBT_LAYER*_MODULATION</constant> </title>
<para > Possible values: <constant > QAM_AUTO</constant> , QP<constant > SK, QAM_16</constant> , <constant > QAM_64</constant> , <constant > DQPSK</constant> </para>
<para > Note: If layer C is <constant > DQPSK</constant> layer B has to be <constant > DQPSK</constant> . If layer B is <constant > DQPSK</constant>
and <constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> =0 layer has to be <constant > DQPSK</constant> .</para>
</section>
<section id= "DTV-ISDBT-LAYER-SEGMENT-COUNT" >
<title > <constant > DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant> </title>
<para > Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para>
<para > Note: Truth table for <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> and
<constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant > LAYER</constant> *_SEGMENT_COUNT</para>
<informaltable id= "isdbt-layer_seg-cnt-table" >
<tgroup cols= "6" >
<tbody >
<row >
<entry > PR</entry>
<entry > SB</entry>
<entry > Layer A width</entry>
<entry > Layer B width</entry>
<entry > Layer C width</entry>
<entry > total width</entry>
</row>
<row >
<entry > 0</entry>
<entry > 0</entry>
<entry > 1 .. 13</entry>
<entry > 1 .. 13</entry>
<entry > 1 .. 13</entry>
<entry > 13</entry>
</row>
<row >
<entry > 1</entry>
<entry > 0</entry>
<entry > 1</entry>
<entry > 1 .. 13</entry>
<entry > 1 .. 13</entry>
<entry > 13</entry>
</row>
<row >
<entry > 0</entry>
<entry > 1</entry>
<entry > 1</entry>
<entry > 0</entry>
<entry > 0</entry>
<entry > 1</entry>
</row>
<row >
<entry > 1</entry>
<entry > 1</entry>
<entry > 1</entry>
<entry > 2</entry>
<entry > 0</entry>
<entry > 13</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
<section id= "DTV-ISDBT-LAYER-TIME-INTERLEAVING" >
<title > <constant > DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant> </title>
<para > Possible values: 0, 1, 2, 3, -1 (AUTO)</para>
<para > Note: The real inter-leaver depth-names depend on the mode (fft-size); the values
here are referring to what can be found in the TMCC-structure -
independent of the mode.</para>
</section>
</section>
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<section id= "DTV-API-VERSION" >
<title > <constant > DTV_API_VERSION</constant> </title>
<para > Returns the major/minor version of the DVB API</para>
</section>
<section id= "DTV-CODE-RATE-HP" >
<title > <constant > DTV_CODE_RATE_HP</constant> </title>
<para > Used on terrestrial transmissions. The acceptable values are:
</para>
<programlisting >
typedef enum fe_code_rate {
FEC_NONE = 0,
FEC_1_2,
FEC_2_3,
FEC_3_4,
FEC_4_5,
FEC_5_6,
FEC_6_7,
FEC_7_8,
FEC_8_9,
FEC_AUTO,
FEC_3_5,
FEC_9_10,
} fe_code_rate_t;
</programlisting>
</section>
<section id= "DTV-CODE-RATE-LP" >
<title > <constant > DTV_CODE_RATE_LP</constant> </title>
<para > Used on terrestrial transmissions. The acceptable values are:
</para>
<programlisting >
typedef enum fe_code_rate {
FEC_NONE = 0,
FEC_1_2,
FEC_2_3,
FEC_3_4,
FEC_4_5,
FEC_5_6,
FEC_6_7,
FEC_7_8,
FEC_8_9,
FEC_AUTO,
FEC_3_5,
FEC_9_10,
} fe_code_rate_t;
</programlisting>
</section>
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<section id= "DTV-GUARD-INTERVAL" >
<title > <constant > DTV_GUARD_INTERVAL</constant> </title>
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<para > Possible values are:</para>
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<programlisting >
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typedef enum fe_guard_interval {
GUARD_INTERVAL_1_32,
GUARD_INTERVAL_1_16,
GUARD_INTERVAL_1_8,
GUARD_INTERVAL_1_4,
GUARD_INTERVAL_AUTO,
GUARD_INTERVAL_1_128,
GUARD_INTERVAL_19_128,
GUARD_INTERVAL_19_256,
} fe_guard_interval_t;
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</programlisting>
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<para > Notes:</para>
<para > 1) If <constant > DTV_GUARD_INTERVAL</constant> is set the <constant > GUARD_INTERVAL_AUTO</constant> the hardware will
try to find the correct guard interval (if capable) and will use TMCC to fill
in the missing parameters.</para>
<para > 2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para>
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</section>
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<section id= "DTV-TRANSMISSION-MODE" >
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<title > <constant > DTV_TRANSMISSION_MODE</constant> </title>
<para > Specifies the number of carriers used by the standard</para>
<para > Possible values are:</para>
<programlisting >
typedef enum fe_transmit_mode {
TRANSMISSION_MODE_2K,
TRANSMISSION_MODE_8K,
TRANSMISSION_MODE_AUTO,
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TRANSMISSION_MODE_4K,
TRANSMISSION_MODE_1K,
TRANSMISSION_MODE_16K,
TRANSMISSION_MODE_32K,
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} fe_transmit_mode_t;
</programlisting>
<para > Notes:</para>
<para > 1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para>
<para > 2) If <constant > DTV_TRANSMISSION_MODE</constant> is set the <constant > TRANSMISSION_MODE_AUTO</constant> the
hardware will try to find the correct FFT-size (if capable) and will
use TMCC to fill in the missing parameters.</para>
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<para > 3) DVB-T specifies 2K and 8K as valid sizes.</para>
<para > 4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para>
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</section>
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<section id= "DTV-HIERARCHY" >
<title > <constant > DTV_HIERARCHY</constant> </title>
<para > Frontend hierarchy</para>
<programlisting >
typedef enum fe_hierarchy {
HIERARCHY_NONE,
HIERARCHY_1,
HIERARCHY_2,
HIERARCHY_4,
HIERARCHY_AUTO
} fe_hierarchy_t;
</programlisting>
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</section>
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<section id= "DTV-ISDBS-TS-ID" >
<title > <constant > DTV_ISDBS_TS_ID</constant> </title>
<para > Currently unused.</para>
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</section>
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<section id= "DTV-DVBT2-PLP-ID" >
<title > <constant > DTV_DVBT2_PLP_ID</constant> </title>
<para > DVB-T2 supports Physical Layer Pipes (PLP) to allow transmission of
many data types via a single multiplex. The API will soon support this
at which point this section will be expanded.</para>
</section>
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</section>
<section id= "frontend-property-terrestrial-systems" >
<title > Properties used on terrestrial delivery systems</title>
<section id= "dvbt-params" >
<title > DVB-T delivery system</title>
<para > The following parameters are valid for DVB-T:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-BANDWIDTH-HZ" > <constant > DTV_BANDWIDTH_HZ</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CODE-RATE-HP" > <constant > DTV_CODE_RATE_HP</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CODE-RATE-LP" > <constant > DTV_CODE_RATE_LP</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-GUARD-INTERVAL" > <constant > DTV_GUARD_INTERVAL</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TRANSMISSION-MODE" > <constant > DTV_TRANSMISSION_MODE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-HIERARCHY" > <constant > DTV_HIERARCHY</constant> </link> </para> </listitem>
</itemizedlist>
</section>
<section id= "dvbt2-params" >
<title > DVB-T2 delivery system</title>
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<para > DVB-T2 support is currently in the early stages
of development, so expect that this section maygrow and become
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more detailed with time.</para>
<para > The following parameters are valid for DVB-T2:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-BANDWIDTH-HZ" > <constant > DTV_BANDWIDTH_HZ</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CODE-RATE-HP" > <constant > DTV_CODE_RATE_HP</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CODE-RATE-LP" > <constant > DTV_CODE_RATE_LP</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-GUARD-INTERVAL" > <constant > DTV_GUARD_INTERVAL</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TRANSMISSION-MODE" > <constant > DTV_TRANSMISSION_MODE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-HIERARCHY" > <constant > DTV_HIERARCHY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DVBT2-PLP-ID" > <constant > DTV_DVBT2_PLP_ID</constant> </link> </para> </listitem>
</itemizedlist>
</section>
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<section id= "isdbt" >
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<title > ISDB-T delivery system</title>
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<para > This ISDB-T/ISDB-Tsb API extension should reflect all information
needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible
that some very sophisticated devices won't need certain parameters to
tune.</para>
<para > The information given here should help application writers to know how
to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para>
<para > The details given here about ISDB-T and ISDB-Tsb are just enough to
basically show the dependencies between the needed parameter values,
but surely some information is left out. For more detailed information
see the following documents:</para>
<para > ARIB STD-B31 - "Transmission System for Digital Terrestrial
Television Broadcasting" and</para>
<para > ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial
Television Broadcasting".</para>
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<para > In order to understand the ISDB specific parameters,
one has to have some knowledge the channel structure in
ISDB-T and ISDB-Tsb. I.e. it has to be known to
the reader that an ISDB-T channel consists of 13 segments,
that it can have up to 3 layer sharing those segments,
and things like that.</para>
<para > The following parameters are valid for ISDB-T:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-BANDWIDTH-HZ" > <constant > DTV_BANDWIDTH_HZ</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CODE-RATE-HP" > <constant > DTV_CODE_RATE_HP</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CODE-RATE-LP" > <constant > DTV_CODE_RATE_LP</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-GUARD-INTERVAL" > <constant > DTV_GUARD_INTERVAL</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TRANSMISSION-MODE" > <constant > DTV_TRANSMISSION_MODE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-HIERARCHY" > <constant > DTV_HIERARCHY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-ENABLED" > <constant > DTV_ISDBT_LAYER_ENABLED</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-PARTIAL-RECEPTION" > <constant > DTV_ISDBT_PARTIAL_RECEPTION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-SOUND-BROADCASTING" > <constant > DTV_ISDBT_SOUND_BROADCASTING</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-SB-SUBCHANNEL-ID" > <constant > DTV_ISDBT_SB_SUBCHANNEL_ID</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-SB-SEGMENT-IDX" > <constant > DTV_ISDBT_SB_SEGMENT_IDX</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-SB-SEGMENT-COUNT" > <constant > DTV_ISDBT_SB_SEGMENT_COUNT</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-FEC" > <constant > DTV_ISDBT_LAYERA_FEC</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-MODULATION" > <constant > DTV_ISDBT_LAYERA_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-SEGMENT-COUNT" > <constant > DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-TIME-INTERLEAVING" > <constant > DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-FEC" > <constant > DTV_ISDBT_LAYERB_FEC</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-MODULATION" > <constant > DTV_ISDBT_LAYERB_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-SEGMENT-COUNT" > <constant > DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-TIME-INTERLEAVING" > <constant > DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-FEC" > <constant > DTV_ISDBT_LAYERC_FEC</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-MODULATION" > <constant > DTV_ISDBT_LAYERC_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-SEGMENT-COUNT" > <constant > DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBT-LAYER-TIME-INTERLEAVING" > <constant > DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant> </link> </para> </listitem>
</itemizedlist>
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</section>
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<section id= "atsc-params" >
<title > ATSC delivery system</title>
<para > The following parameters are valid for ATSC:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-BANDWIDTH-HZ" > <constant > DTV_BANDWIDTH_HZ</constant> </link> </para> </listitem>
</itemizedlist>
</section>
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</section>
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<section id= "frontend-property-cable-systems" >
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<title > Properties used on cable delivery systems</title>
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<section id= "dvbc-params" >
<title > DVB-C delivery system</title>
<para > The DVB-C Annex-A/C is the widely used cable standard. Transmission uses QAM modulation.</para>
<para > The following parameters are valid for DVB-C Annex A/C:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-SYMBOL-RATE" > <constant > DTV_SYMBOL_RATE</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-ROLLOFF" > <constant > DTV_ROLLOFF</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-INNER-FEC" > <constant > DTV_INNER_FEC</constant> </link> </para> </listitem>
</itemizedlist>
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<para > The Rolloff of 0.15 (ROLLOFF_15) is assumed, as ITU-T J.83 Annex A is more common. For Annex C, rolloff should be 0.13 (ROLLOFF_13). All other values are invalid.</para>
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</section>
<section id= "dvbc-annex-b-params" >
<title > DVB-C Annex B delivery system</title>
<para > The DVB-C Annex-B is only used on a few Countries like the United States.</para>
<para > The following parameters are valid for DVB-C Annex B:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
</itemizedlist>
</section>
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</section>
<section id= "frontend-property-satellital-systems" >
<title > Properties used on satellital delivery systems</title>
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<section id= "dvbs-params" >
<title > DVB-S delivery system</title>
<para > The following parameters are valid for DVB-S:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-SYMBOL-RATE" > <constant > DTV_SYMBOL_RATE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INNER-FEC" > <constant > DTV_INNER_FEC</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-VOLTAGE" > <constant > DTV_VOLTAGE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TONE" > <constant > DTV_TONE</constant> </link> </para> </listitem>
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</itemizedlist>
<para > Future implementations might add those two missing parameters:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-DISEQC-MASTER" > <constant > DTV_DISEQC_MASTER</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DISEQC-SLAVE-REPLY" > <constant > DTV_DISEQC_SLAVE_REPLY</constant> </link> </para> </listitem>
</itemizedlist>
</section>
<section id= "dvbs2-params" >
<title > DVB-S2 delivery system</title>
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<para > In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para>
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<itemizedlist mark= 'opencircle' >
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<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
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<listitem > <para > <link linkend= "DTV-PILOT" > <constant > DTV_PILOT</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ROLLOFF" > <constant > DTV_ROLLOFF</constant> </link> </para> </listitem>
</itemizedlist>
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</section>
<section id= "turbo-params" >
<title > Turbo code delivery system</title>
<para > In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para>
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<itemizedlist mark= 'opencircle' >
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<listitem > <para > <link linkend= "DTV-MODULATION" > <constant > DTV_MODULATION</constant> </link> </para> </listitem>
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</itemizedlist>
</section>
<section id= "isdbs-params" >
<title > ISDB-S delivery system</title>
<para > The following parameters are valid for ISDB-S:</para>
<itemizedlist mark= 'opencircle' >
<listitem > <para > <link linkend= "DTV-API-VERSION" > <constant > DTV_API_VERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-DELIVERY-SYSTEM" > <constant > DTV_DELIVERY_SYSTEM</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-TUNE" > <constant > DTV_TUNE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-CLEAR" > <constant > DTV_CLEAR</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-FREQUENCY" > <constant > DTV_FREQUENCY</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INVERSION" > <constant > DTV_INVERSION</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-SYMBOL-RATE" > <constant > DTV_SYMBOL_RATE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-INNER-FEC" > <constant > DTV_INNER_FEC</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-VOLTAGE" > <constant > DTV_VOLTAGE</constant> </link> </para> </listitem>
<listitem > <para > <link linkend= "DTV-ISDBS-TS-ID" > <constant > DTV_ISDBS_TS_ID</constant> </link> </para> </listitem>
</itemizedlist>
</section>
2011-06-08 07:52:33 +08:00
</section>
2009-10-25 08:18:46 +08:00
</section>
