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Verification.book Page 52 Monday, January 19, 2004 1:40 PM
1
Performance Tests
52
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13 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.
14 Disable the optical attenuator then disconnect the optical
signal from the OmniBER OTN Optical IN port and connect
to the power meter. Re-enable the optical attenuator.
15 Check the power meter reading is between:
–10.5 dBm and –9.5 dBm
16 Repeat
step 4
through
[OC-3] in
step
5.
OC-12/STM-4 Rate
17 Set the OmniBER OTN Transmitter to provide OC-12 output
with PRBS bulk payload as follows:
Press <Menu>, choose Tx/Rx > Transmitter Settings >
Physical then press <Select>. Set the Signal Rate to OC12,
Wavelength 1310 nm (or if this is not fitted, select 1550 nm).
Ensure the Laser is set to ON.
Check the laser LED is illuminated at the selected output
port.
Ensure the optical attenuator and optical power meter are
set for the wavelength being used.
18 Adjust the optical attenuator to obtain a reading of –28 dBm
on the power meter (that is, the receiver minimum sensitivity
for 622 Mb/s rates). Take note of the attenuator setting.
19 Set the optical attenuator to Disable mode.
Note: do not switch OFF the OmniBER OTN laser.
Disconnect the optical attenuator output from the power
meter and connect to the OmniBER OTN'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.
step
15, substituting SIGNAL RATE
Verification Manual
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