Agilent Technologies OmniBER OTN Series Performance Verification Manual page 31

Verification.book Page 28 Monday, January 19, 2004 1:40 PM
1
Performance Tests
PDH/DSn Test Set
28
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OmniBER OTN
2 Mb/s DATA
UNBAL
step 18
BAL
14 Ensure the PDH/DSn test set transmitter is set as follows.
SIGNAL to 2 Mb/s rate
CLOCK to EXTERNAL 10 MHz REF
TERMINATION to 75 ohm UNBAL
LINE CODE to HDB3
PAYLOAD TYPE to UNFRAMED
PATTERN to 2^23 PRBS
15 Check that the test set CLOCK LOSS Alarm LED is not lit.
16 Adjust the frequency counter trigger level to obtain a stable
reading and check that the frequency counter reads between:
Counter 10 MHz
Reference OUTPUT
53181A Counter
Matching pad
and/or termination
2 MHz Clock O/P
10MHz Reference to External 10M Clock Input
Verification Manual