A SERVICE OF

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5-24
Servicing
Adjustment Procedure
To adjust total power
Description
The total power is adjusted by a potentiometer. The potentiometer is located
on the A5 Laser Driver Board Assembly.
Procedure
1
Remove the instruments top and bottom covers.
2
Connect a power meter to the Agilent 83438As front-panel
OPTICAL OUT
connector.
3
Locate R18 on the A5 Laser driver board assembly for the pump laser. See the
following figure.
4
Adjust potentiometer R18 on the A5 Laser driver board assembly to set the
output power between +5.5 dBm and +8.1 dBm (3.6 mW to 6.5 mW).