Cobalt Digital COMPASS 9220 Bidirectional ASI_MPTS Gateway User Manual
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9220-UM V1.1
Common
Parameters
Redundancy
Control
Primary
Addressing
Parameters
Common
Parameters
Redundancy
Control
Primary
Addressing
Parameters
Common Parameters
•
Enabled: This allows the stream to be enabled or disabled. If it is disabled, no packet
reception takes place. This feature is provided for testing purposes (i.e., temporarily
disable an input for fault-finding). Most users will leave the stream enabled.
•
Stream Name: All 9220 inputs and outputs can be assigned a user-defined name. This
name is used to identify the port later when making connections. Use any descriptive
name suitable for your application, or accept the default.
•
Latency (ms): This is the de-jitter latency, in milliseconds. This setting corresponds to
the buffering latency introduced by the 9220 to remove IP jitter. At 120 Mb/s, the
maximum latency supported is 100 ms; at lower rates, the maximum will be
proportionally increased (for example, at 20 Mb/s, the maximum is 600 ms). Entering a
value of 0 (zero) disables the de-jitter function
2
. Once the port is created an in operation,
the 9220 will measure the actual jitter. Therefore, if the input jitter is unknown (which is
the most common case), set this parameter to 100 ms, run the unit for a representative
period of time, read the measured jitter, and then reduce it. This process is described in
detail later in the “Determining the Latency Settings” section.
2
Note that an IP stream with a de-jitter setting of zero must not be connected to an ASI output as it will cause
overflows.