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Packet over SDH (POS)
Jitter Tolerance Testing of POS Equipment
How To
Perform a Jitter Tolerance Measurement
1 Set up the transmitter and select a POS payload with a fixed 2^23-1 PRBS (see
Payload" page 194.
2 Select the
3 Set the SETUP field to
practical for the system under test (this gives better coverage for error detection).
For this example we selected a length of 4096 and a gap of 1.
4 Select the IP DATAGRAM LENGTH field as required.
5 Set the INTER PACKET GAP as required (the smaller the better, for increased
coverage).
6 If you are performing jitter tolerance on an SDH Optical signal, check on the
optical power level falls within the white portion of the coloured bar
the accuracy of the Jitter results.
7 Set up the receiver for POS operation, see "Setting up the Receiver for POS
Operation" page 197 and "Setting up the Receiver POS signal" page 199.
Set the receiver payload to 2^23-1PRBS
222
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"Setting up the Transmitter for POS Payloads " page 185) and "Setting IP
POS SETTINGS
PACKET SIZE/GAP
SDH RESULTS
RESULTS
folder as shown below.
and select a size as large as
display that the measured
OPTICAL POWER
This ensures
.
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