26
Verification Manual
1
Performance Tests
Connect the PDH/DSn test set CLOCK REF OUT or
TRANSMIT CLOCK OUT port to the instrument’s CLOCK IN
2MHz BNC port.
4
Set the PDH/DSn test set transmitter as follows.
SIGNAL to 2 Mb/s rate
CLOCK to EXTERNAL 10 MHz REF
5
Check that the PDH/DSn test set CLOCK LOSS alarm LED is
not lit.
6
Adjust the frequency counter trigger level to obtain a stable
reading and check that the frequency counter reads between:
2.047999999 MHz and 2.048000001 MHz
.
10MHz Reference to External 10M Clock Input
PDH/DSn Test Set/Synthesizer
2M Ref Out or
Clock Out
2 MHz Clock O/P
Matching pad
and/or termination
53181A Counter
Output
Counter 10 MHz
Reference OUTPUT
Signal
OmniBER OTN
step 9
Verification.book Page 26 Monday, January 19, 2004 1:40 PM
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