108
Installation and Verification Manual
3
Performance Tests
Press
<Menu>
, choose
Tx/Rx > Transmitter Settings
then
press
<Select>
. Select the
Physical
tab. Set the
Signal Mode
to
OTN
and
Signal Rate
to
OTU-1
.
16
Adjust the Optical Attenuator to obtain a reading of –26 dBm
on the Power Meter (that is, the Receiver minimum
sensitivity for 2.66 Gb/s rate). Take note of the Attenuator
setting.
17
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
(2.66 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
Set 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 –26 dBm output)
Set the OmniBER OTN’s Receiver to display
Optical Power
.
Press
<Smart Test>
, choose
Shortcuts > Optical Power
then
press
<Select>
. Set
Wavelength
to 1310/1550 nm as
appropriate, and check that the optical power measurement
reads between:
–28 dBm and –24 dBm
Set the OmniBER OTN’s Receiver to display
Frequency
and
check that the frequency measurement reads between:
2666.0570 MHz and 2666.0572 MHz
panther3_iv.book Page 108 Wednesday, January 15, 2003 12:03 PM
