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Verification.book Page 22 Monday, January 19, 2004 1:40 PM
1
Performance Tests
22
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9 Set the test set to display the frequency measurement and
ppm offset results and check these are between:
1543993 and 1544007 Hz.
–4.5 and +4.5 ppm
10 Change the test setup as follows. Disconnect the loopback
connection between test set Tx/Rx then connect the
OmniBER OTN DS1 clock out port to the test set DS1 receive
port using the Bantam to Bantam cable.
11 Check there are no errors or alarms indicated by the test set
receiver.
12 Set the test set to display the frequency offset measurement
result and check this is between:
–9 ppm and +9 ppm
13 Subtract the ppm test set error noted in step 9 from the
result in step 12 to give the OmniBER OTN transmitter DS1
Bits frequency error in ppm and check this is between:
–4.5 ppm and +4.5 ppm
14 Test is now complete.
Verification Manual
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