7. Input Local Null Adjustment
The purpose of this procedure is to minimize the rst local leakage.
Note
HP VEE Adjustment Program is not required in this adjustment. Follow the
procedures below and adjust proper item using the internal adjustment test.
Required Equipment
None
Procedure
1. Turn the HP 4395A OFF.
2. To gain access to the adjustment components, remove the top and bottom covers of the
HP 4395A.
3. Turn the HP 4395A ON.
4. Press
4
System
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE TESTS
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ADJUSTMENT TESTS
to display the internal adjustment tests
menu.
5. Press
4
6
5
,
4
5
5
or use
4
*
5
/
4
+
5
to select the internal adjustment test 65: A9 LO ADJ
.
6.
Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST
to run the test.
7. Adjust \ADJ-LO-A"and \ADJ-LO-B" on the A9 Input Multiplexer Board until pass is
displayed on the screen.
5-18 Adjustments
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