Agilent Technologies 1141A, User'S Manual And Service Manual

Page: 38 / 88

38 1141A and 1142A User’s Guide
2 Calibrating the Probe
CMRR Test
CMRR Test
This test checks the CMRR at 1 MHz and 100 MHz.
Specification: . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3000:1 at 1 MHz, 10:1 at 100 MHz
1
Connect the probe power connector to the
PROBE
connection on the
rear of the 1142A Probe Control and Power Module.
2 Set the 1142A front panel switches to Local and Zero offset.
3 Connect the probe output to the oscilloscope channel 1 input.
4 Connect the input of the probe to the test board in the position
shown in the
Figure 18 .
Figure 18 Signal to +Input
5 Connect the signal generator to the test board.
6 Set the signal generator for 1 MHz at 385 mV
rms
(1 V
p- p
).
7 On the oscilloscope, press AUTOSCALE and set the following
parameters.
Table 9 Equipment Required
Equipment Required Critical Specifications
Recommended
Agilent
Model/Part
Oscilloscope 400 MHz bandwidth at 1 mV/div 54830B
Signal Generator 1-100 MHz at = 400 mVrms 8648A
Test Board No substitute 01141-66504
Cable Type N (m) 24-inch 11500B
Adapter Type N (f) to BNC (m) 1250-0077