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RF Level
C/N
BER
TS Sync
To set up switch criteria for each input streaming and audio input in the decoder:
1.
Open the window Switch Criteria under Codec Settings→Switch Criteria in the web interface of the IP-4c.
2.
See the switch criteria for input streaming sources and audio inputs in Figure 43 - Figure 47 on page 70.
3.
Enable each switch criterion separately by activating the virtual switch "Enable", if this parameter should be
monitored.
4.
Enter the maximal threshold values to define minimal delay period for "Packet jitter" in ms, the minimal
percentage value for the "Packet loss" and the silence level in dBFS in the decoded audio signal.
5.
Define for each criterion the delay time T1 (in milliseconds) for switching release. The delay time from this
defined value will be regarded by the system as "bad", so that after the delay time T1 the device switches the
input stream to the configured backup source.
6.
Define for each criterion the delay time T2 (in milliseconds) for switching end, how long a "good" signal for this
parameter in the previous input stream should be available, before the system switches back.
7.
Click the "Save" button to save the changes.
The device switches to the next best input source.
The virtual LED lights green or red in the field "Source Assignment" in the tab "Decoder" under Codec Settings→Codec
near the active source (see Figure 40 "Decoder Configuration" on page 66).
Some switch criteria can be also configured for sending alarm. These alarms for audio inputs will be signaled via SNMP,
by switching LED and/or a relay if enabled (see section 15.2 "Set up Monitoring for Audio Inputs" on page 75).
Figure 43: Switch criteria for input streams "TS/IP", "Elementary Streams", "Livewire" and "SIP" in the decoder
Figure 44: Switch criteria for input streams over "SRT" in the decoder
User Manual IP-4c V1.96
The decoder will switch to the next input source if the radio frequency level is below
the set value
The decoder will switch to the next input source if the channel noise ratio is below the
set value.
The decoder will switch to the next input source if the Bit Error Rate is above the set
value.
The decoder will switch to the next input source if the transport stream is not
synchronized.
70
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