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Adjustment Procedure; Power Supply Voltage Check And Adjustment - HP 8447D Operation And Service Manual

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Figure 10

Adjustment Procedure

Power Supply Voltage Check and Adjustment

Description:
To insure that the amplifier gives proper gain, the power supply is adjusted to 20V
±
0.1V.
Equipment:
Digital voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3440A/3444A
RMS voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3400A
Cable assembly (w/test clips). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10501A
Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10111A
Power Supply Voltage Adjustment Test Setup
Procedure:
1 Connect the test setup in Figure 10. Set the digital voltmeter to measure +20V dc.
2 Adjust A1R9 VOLT ADJ for a digital voltmeter reading of +20V ±0.1V dc.
3 Remove the digital voltmeter from the amplifier and connect the RMS voltmeter to
XA1 pin 14. The ripple voltage should be as shown below.
DRAFT
+
DVM:
19.9V dc
_________________
Operation and Service Manual
Adjustment Procedure
+
20.1V dc
33

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