Agilent Technologies OmniBER OTN Series Performance Verification Manual page 63

Verification.book Page 60 Monday, January 19, 2004 1:40 PM
1
Performance Tests
60
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Disconnect the optical attenuator output from the power
meter and connect to the OmniBER OTN's Optical IN port
(9.95/10.71 Gb/s). Ensure all optical connectors are clean
and all connections are tight with no twists in the optical
cable. Set the optical attenuator to Enable.
18 Ensure the OmniBER OTN to TX>RX Coupled Mode.
19 Press <Smart Test>, choose Shortcuts > Trouble Scan then
press <Select>. Press <Run/Stop> to begin measurement.
After 1 minute check that 'No Trouble' is displayed in the
Results window to confirm no errors have been detected.
20 Increase the optical attenuator setting to find the point just
before the occurrence of errors by observing the Errors LED
while adjusting attenuator. Record the additional attenuation
setting. (typically, this will be at least 1 dB).
Press <Run/Stop> to stop measurement.
21 Re-set optical attenuator to the setting noted in
(providing -16dBm).
Set the OmniBER OTN's receiver to display Optical Power
and check that the optical power measurement reads
between:
–17.5 dBm and –14.5 dBm
Set the OmniBER OTN's receiver to display Frequency and
check that the frequency measurement reads between:
1070.9224 MHz and 1070.9226 MHz
22 Reduce the optical attenuator setting by 9 dB and check the
receiver Optical Power result is between:
–8.5 dBm and –5.5 dBm
23 Press <Smart Test>, choose Shortcuts > Trouble Scan then
press <Select>. Press <Run/Stop> to begin measurement.
After 1 minute check that 'No Trouble' is displayed in the
Results window to confirm no errors have been detected.
Press <Run/Stop> to stop measurement.
step 16
Verification Manual