Agilent Technologies OmniBER OTN Series Performance Verification Manual page 57

Verification.book Page 54 Monday, January 19, 2004 1:40 PM
1
Performance Tests
54
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–8.5 dBm and –7.5 dBm
OC-48/STM-16 Rates
1 Press <Menu>, choose System > Stored Settings then press
<Select>. Select Default then Recall.
2 Set the optical attenuator to:
ATTEN 15 dB
WAVELENGTH 1550 nm (or 1310 nm depending on
wavelength used)
CAL=0
ENB ON
Set the optical power meter to
WAVELENGTH 1550 nm (or 1310 nm depending on
wavelength used)
Connect the optical attenuator between the power meter and
the OmniBER OTN's Optical Out port (ensure that all
connections are tight and that the cable has no twists).
3 Set the OmniBER OTN Transmitter to provide OC-48 output
with PRBS bulk payload as follows:
Press <Menu>, choose Tx/Rx > Transmitter Settings >
Physical then press <Select>. Set the Signal Mode to SONET
and Signal Rate to OC48, Wavelength 1550 nm (or if this is
not fitted, select 1310 nm). Ensure the Laser is set to ON.
Check the laser LED is illuminated at the selected output
port.
4 Adjust the optical attenuator to obtain a reading of –28 dBm
on the power meter (that is, the receiver minimum sensitivity
for 2.5 Gb/s rate). Take note of the attenuator setting.
5 Set the optical attenuator to Disable mode.
Note: do not switch OFF the OmniBER OTN laser.
Verification Manual