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3
Performance Tests
108
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 Transmission Test Set's Optical Out port (ensure that all
connections are tight and that the cable has no twists).
4 Set the Transmission Test Set Transmitter to provide OC-48
output with PRBS bulk payload as follows:
Press <Menu>, choose System > Preferences then press
<Select>. Set Network Standard to SONET.
Press <Menu>, choose Tx/Rx > Transmitter Settings then
press <Select>. Select the Physical tab. Set 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.
5 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.
6 Set the Optical Attenuator to Disable mode.
Note: do not switch OFF the Transmission Test Set laser.
Disconnect the Optical Attenuator Output from the Power
Meter and connect to the Transmission Test Set's Optical IN
Port (2.5 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.
7 Set the Transmission Test Set to TX>RX Coupled Mode.
8 Press <Smart Test>, choose Shortcuts > Trouble Scan then
press <Select>.Press <Run/Stop> to begin measurement.
Installation and Verification Manual
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