Cisco Cisco Digital Service Access Node (DSAN) 8210 Troubleshooting Guide
Chapter 5 Video Output
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Confirming Video Output
The DSAN configures its video channel lineup in one of two ways, depending on the
contents of its cache.
contents of its cache.
If the DSAN cache does not contain valid configuration data, the DSAN starts
building a channel lineup following successful eCM and Host registration based
on the downloaded configuration and headend SI data.
building a channel lineup following successful eCM and Host registration based
on the downloaded configuration and headend SI data.
If the DSAN cache already contains valid configuration data, the DSAN
immediately builds the channel lineup following system initialization using the
cached configuration, without waiting on completion of eCM and Host
registration. Following eCM and Host registration, the DSAN re-examines the
headend SI data, and if there is any change in configuration, rebuilds the channel
lineup.
immediately builds the channel lineup following system initialization using the
cached configuration, without waiting on completion of eCM and Host
registration. Following eCM and Host registration, the DSAN re-examines the
headend SI data, and if there is any change in configuration, rebuilds the channel
lineup.
You can confirm the channel remap state on CLI diag page 1.0, as shown in the
following example.
following example.
Wideband Tuner Setup
After preparing the channel lineup, the DSAN assigns each of the three wideband
tuners to a designated QAM center frequency and commands each tuner to lock to
that frequency and begin processing the RF input.
tuners to a designated QAM center frequency and commands each tuner to lock to
that frequency and begin processing the RF input.
Each wideband tuner handles a continuous 48 MHz bandwidth. A properly
configured channel lineup will fit within the combined bandwidth of the three
tuners.
configured channel lineup will fit within the combined bandwidth of the three
tuners.