Agilent Technologies 1141A, Руководство пользователя и сервисное руководство

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48 1141A and 1142A User’s Guide
3 Adjusting the Probe
Probe Adjustment
16 Carefully connect the input of the probe to the test board in the
position shown in the
Figure 24 .
Figure 24 Signal to +Input
17
Center adjustment R11,
HF CMRR
, as shown in Figure 25 on
page 48.
Figure 25 R11, HF CMRR Adjustment
18
Adjust R9,
HF GAIN
so the V
p- p
(1) measurement is the same as in
step 4, within ±0.5%. Make the adjustment slowly so the
oscilloscope display has time to react to signal averaging. Press
CLEAR DISPLAY occasionally to restart averaging, which gives a
quicker indication of changes.
19
Carefully connect the probe to the test board in the position shown
in
Figure 26 .