52
Verification Manual
1
Performance Tests
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
step 15
, substituting SIGNAL RATE
[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.
Verification.book Page 52 Monday, January 19, 2004 1:40 PM
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