media: dvbproperty.rst: minor editorial changes
Do some minor editorial changes to make this chapter visually better, and the example a little bit clearer. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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@ -8,8 +8,8 @@ DVB Frontend properties
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Tuning into a Digital TV physical channel and starting decoding it
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requires changing a set of parameters, in order to control the tuner,
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the demodulator, the Linear Low-noise Amplifier (LNA) and to set the
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antenna subsystem via Satellite Equipment Control (SEC), on satellite
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systems. The actual parameters are specific to each particular digital
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antenna subsystem via Satellite Equipment Control - SEC (on satellite
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systems). The actual parameters are specific to each particular digital
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TV standards, and may change as the digital TV specs evolves.
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In the past (up to DVB API version 3), the strategy used was to have a
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@ -41,25 +41,24 @@ with suppports all digital TV delivery systems.
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4. DVB API version 5 is also called *S2API*, as the first
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new standard added to it was DVB-S2.
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Example: with the properties based approach, in order to set the tuner
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to a DVB-C channel at 651 kHz, modulated with 256-QAM, FEC 3/4 and
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symbol rate of 5.217 Mbauds, those properties should be sent to
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**Example**: in order to set the hardware to tune into a DVB-C channel
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at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol rate of 5.217
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Mbauds, those properties should be sent to
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:ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` ioctl:
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- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` =
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SYS_DVBC_ANNEX_A
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:ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` = SYS_DVBC_ANNEX_A
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- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` = 651000000
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:ref:`DTV_FREQUENCY <DTV-FREQUENCY>` = 651000000
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- :ref:`DTV_MODULATION <DTV-MODULATION>` = QAM_256
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:ref:`DTV_MODULATION <DTV-MODULATION>` = QAM_256
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- :ref:`DTV_INVERSION <DTV-INVERSION>` = INVERSION_AUTO
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:ref:`DTV_INVERSION <DTV-INVERSION>` = INVERSION_AUTO
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- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` = 5217000
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:ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` = 5217000
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- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` = FEC_3_4
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:ref:`DTV_INNER_FEC <DTV-INNER-FEC>` = FEC_3_4
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- :ref:`DTV_TUNE <DTV-TUNE>`
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:ref:`DTV_TUNE <DTV-TUNE>`
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The code that would that would do the above is show in
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:ref:`dtv-prop-example`.
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