T-VIPS CP560, User Manual

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154 Examples of Use
CP560 DVB-T2 Gateway User’s Manual Rev. 2.2 (3686) ID: um_t2gateway
Perform these steps on both CP560 units in order to operate in a Seamless SFN environment
for DVB-T2.
1. Connect 1PPS and enable Clock Regulator if not already enabled. This is shown in
section 8.4.6 .
2. Set up a SNTP Time Source, see section 8.4.4 . TDT and TOT may be configured, but
will only be used for alarm log and GUI time. SNTP servers are the only valid time
source for the internal time synchronization.
3. Enable the output of the unit, see section 8.6.3 .
4. Set the Bitrate setting to Automatic mode. This is used to reduce the number of null
packets in the T2-MI stream to a minimum. This is required for seamless switching
in the T-VIPS TNS541 TS Seamless Switch, as null packets could affect the seamless
switching operation.
5. Disable PCR insertion, see section 8.6.4.4 . Also required for seamless operation in the
T-VIPS TNS541 where the PCR packets could affect the seamless switching operation.
6. Use Relative or Absolute DVB-T2 Timestamps, see section 8.6.4.1 .
7. Make sure that the field
Timestamp sync
in section 8.6.4.1 reflects your time settings.
If not press the Resync button.
8. Configure your desired T2-Settings.
9. Ensure that the settings are identical on both units.
10. The reader is referred to the T-VIPS TNS541 TS Seamless Switch User’s Manual for how
to set the TNS541 to T2-MI mode.
11. Connect both CP560 to the same switch on the TNS541.
Tip: Once you have configured one CP560, store you configuration file to
disk and upload it to the other CP560 to ensure that they have the same
settings. See section
8.4.7 for how to do this.
10.6 Redundant system with TNS541 TS Seamless Switch
Having connected 2 CP560’s to a TNS541, the TNS541 will select the best input. The best input
is determined from the alarm status of each input. For example if the TNS541 loses input sync
it will switch to the other input.