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PDH/DSn Test Set/Synthesizer
Installation and Verification Manual
Transmission Test Set
2M REF OUT or
CLOCK OUT
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 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:
7 Confirm that the Transmission Test Set is locked to the
External signal by disconnecting/re-connecting the BNC
cable at the instrument CLOCK IN port.
8 Change the Transmission Test Set External Clock, Format
setting to 2 Mb/s Data.
9 Change the 2 MHz CLOCK OUT connection at the Test Set to
connect the Transmit 2 Mb/s DATA out BNC to the
Transmission Test Set CLOCK IN BNC port.
53181A Counter
2 MHz Clock O/P
10 MHz Reference to External 10M Clock Input
2.047999999 MHz and 2.048000001 MHz.
Performance Tests
Counter 10 MHz
Reference OUTPUT
Signal
Output
Matching pad
and/or termination
3
81
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