Cisco Headend System Release 2.7
2
4024313 Rev B
PSIP and the Channel Maps
PSIP and the Channel Maps
PSIP data is generated by the DNCS for Cisco QAM modulators, that are not in
pass-through mode, for any content that is not encrypted. Depending upon the
DNCS system release, either the Default Channel Map or Host Default Channel Map
is used to associate a channel number with the content in the PSIP data. If these
channel maps are not populated, depending upon the system release, the DNCS will
either use zero (0) for the channel number, or not supply the PSIP data at all.
The following information describes how PSIP must be defined in the various
The following information describes how PSIP must be defined in the various
system releases.
System Release 4.0 and Earlier
For System Release (SR) 4.0 and earlier, a clear digital program must be saved in the
Default Channel Map in order for its PSIP data to be complete. Clear digital
programs not saved in the Default Channel Map will have their minor channel
number and short name values set to zero (0). The Host may attempt to process
whatever PSIP data it has, but results are unpredictable.
Note: The Host Default Channel Map does not yet exist in SR 4.0 and earlier.
Note: The Host Default Channel Map does not yet exist in SR 4.0 and earlier.
System Release 4.2
For SR 4.2, both the Host Default Channel Map and the Default Channel Map exist.
A clear digital program must be saved in the Host Default Channel Map in order for
its PSIP data to be complete. Clear digital programs not saved in the Host Default
Channel Map will have their minor channel number and short name values set to
zero (0). The Host may attempt to process whatever PSIP data it has, but results are
unpredictable.
Notes:
Notes:
From this point forward, the Default Channel Map is not used to define PSIP
data.
After an upgrade to SR 4.2 or later, from a system release earlier than SR 4.2, the
Host Default Channel Map appears empty and must be populated by the system
operator in order for PSIP to be configured properly.
System Release 4.3
A clear digital program must be saved in the Host Default Channel Map in order for
any of its PSIP data to be created. If a clear digital program is not saved in the Host
Default Channel Map, the PSIP data for that clear digital program is not created at
all.