20
Verification Manual
1
Performance Tests
4
Adjust the frequency counter trigger level to obtain a stable
reading and check that the frequency counter reads between:
2.0479908 MHz and 2.0480092 MHz.
5
Press
<Menu>
, choose
Tx/Rx > Transmitter Settings >
Physical
then press
<Select>
.
Set the
Signal Mode
to
SONET
.
6
Connect the DS1 Transmit OUT to Receive IN ports of the
test set using a Bantam to Bantam cable. Also connect an
external 10 MHz Reference signal to the test set 10M CLOCK
input port.
External High Stability
10 MHz Reference may
be required
Matching pad
and/or termination
2 MHz Clock OUT
(75
Ω
UnBal)
53181A Counter
OmniBER OTN
N O T E
The reading should be well within these limits. However, after several
years of operation the main reference oscillator may need adjustment
optimized to compensate for drift/ageing. If necessary contact your local
Agilent Service for advice. Before doing so ensure the Counter being used
has the appropriate internal/external reference accuracy.
Verification.book Page 20 Monday, January 19, 2004 1:40 PM
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