Agilent Technologies 83438A - Manual (Page 78)

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 instrument’s top and bottom covers.
2 Connect a power meter to the Agilent 83438A’s 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).