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3
Performance Tests
106
Disconnect the Optical Attenuator Output from the Power
Meter and connect to the Transmission Test Set's Optical IN
Port (51–622 Mb/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.
20 Ensure the Transmission Test Set is set to TX>RX Coupled
Mode.
21 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.
22 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.
23 Re-set the Optical Attenuator to the setting noted in step 18
(providing –28 dBm output).
Set the Transmission Test Set's Receiver to display Optical
Power. That is, press <Smart Test> then select Shortcuts >
Optical Power. Set Wavelength to 1310/1550 nm as
appropriate and check that the optical power measurement
reads between:
Set the Transmission Test Set's Receiver to display
Frequency and check that the frequency measurement reads
between:
622.07999 MHz and 622.08001 MHz
24 Decrease the Optical Attenuator setting by a further 20 dB
and check the Receiver Optical Power result is between:
25 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.
–29 dBm and –27 dBm
–9 dBm and –7 dBm
Installation and Verification Manual
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