Linear Amplitude - HP 8112A Operating, Programming And Servicing Manual

HP 8112A
r - -
0 0
5 0 O h m
Note
9-16 Adjustment Procedures
Make a note of the adjusted voltage.
12.
Set the DVM to read DC voltages. If the DVM does not have
13.
a built-in filter, use an external low pass filter, as shown in
Figure 9-6.
- - - l
0
f e e d t h r o u g h
Figure 9-6. Low Pass Filter
14. Switch COMPL on and off, and adjust AlR403 to obtain the
minimum amplitude difference between the two modes (Same
DVM reading as step 11).
15. Adjust AlR425 for 0 V 610 mV.
If the adjustments are not possible, change value of AlR437 (see
table 9-l) and repeat steps 1 to 15.
16. Set the HP 8112A as follows:
HIL
17. Set up the DVM to read AC voltages up to 10 V. Switch filter
OFF or remove external filter.
18. Adjust A2R46 for 0.506 V f5 mV RMS.
19. Use the DVM built-in filter and set the DVM to read DC
voltages. If the DVM does not have a built-in filter, use an
external low pass filter, as shown in Figure 9-6.
20. Adjust AlR416 for 0 V f5 mV.

Linear Amplitude

21. Set up the HP 8112A as follows:
Transition
HIL
22. Switch COMPL on and off, and adjust AlR407 to obtain
the minimum amplitude difference between the two modes
0 V f 10 mV (Same DVM reading).
23. Set up the DVM to read AC voltages up to 10 V. Switch filter
OFF or remove external filter.
Voltmeter (HP 3458A)
-0.5 v
Linear
-4.99 v
. . I
. .