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3
Performance Tests
Transmission Test Set
DS1
Clock
OUT
NO TE
NO TE
76
DSn Test Set (37718C with Optn 012)
Bantam to Bantam Cable
7 Setup the Test Set Settings as follows:
Tx/Rx to COUPLED mode.
SIGNAL to DS1 rate
PAYLOAD TYPE to ESF UNSTRUCTURED
PATTERN to ALL ONES
Set the Transmitter CLOCK to EXTERNAL 10 MHz REF
This ensures the Test Set transmitter generates a DS1 signal locked to the
External 10 MHz reference signal, e.g. in-house Standard. The signal is
looped to the Test Set receiver to take note of the receiver frequency
measurement accuracy/error.
8 Check there are no Alarms/Errors indicated by the Test Set
Receiver.
If the Test Set CLOCK LOSS LED is ON check the external reference signal.
External
10 MHz Reference
to Clock Timing I/P
Loop DS1
Tx/Rx
OUT/IN
Installation and Verification Manual
To DS1 Data
Input step 10
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