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5-39
Servicing
Adjustment Procedures
Adjustment 1. Power Supply
In this procedure, you’ll adjust both the –12V and +12V supplies. These sup-
plies are located on the A3 Power Supply Assembly. Because the
+5V ADJ
potentiometer is not used in this instrument, it is not adjusted.
1
Connect the line-power cord to the Agilent 83430A’s rear panel connector.
2
Turn on the Agilent 83430A.
3
Measure the dc voltage between the
–OUT
(violet wire) and
+OUT
(black wire)
terminals located on the A3 assembly. Adjust the
–12V ADJ
potentiometer so
that the voltage measures between –5.15 Vdc and –5.20 Vdc.
4
Measure the dc voltage between the
+OUT
(red wire) and
COM
(black wire)
terminals. Adjust the
+12V ADJ
potentiometer so that the voltage measures
between +11.8 Vdc and +12.0 Vdc.
5
If any of the potentiometer were adjusted in this procedure, you must perform
the steps in “Adjustment 2. Laser Bias and Control” on page 5-41.