2.3.4. Properties used on cable delivery systems¶
2.3.4.1. DVB-C delivery system¶
The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.
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
The following parameters are valid for DVB-C Annex A/C:
- DTV_API_VERSION
- DTV_DELIVERY_SYSTEM
- DTV_TUNE
- DTV_CLEAR
- DTV_FREQUENCY
- DTV_MODULATION
- DTV_INVERSION
- DTV_SYMBOL_RATE
- DTV_INNER_FEC
- DTV_LNA
In addition, the DTV QoS statistics are also valid.
2.3.4.2. DVB-C Annex B delivery system¶
The DVB-C Annex-B is only used on a few Countries like the United States.
The following parameters are valid for DVB-C Annex B:
- DTV_API_VERSION
- DTV_DELIVERY_SYSTEM
- DTV_TUNE
- DTV_CLEAR
- DTV_FREQUENCY
- DTV_MODULATION
- DTV_INVERSION
- DTV_LNA
In addition, the DTV QoS statistics are also valid.