Check The R, A, And B Inputs - Agilent Technologies 8753ES Option 011 Service Manual

Check the R, A, and B Inputs

Good inputs produce traces similar to
input trace, do the following:
1. Connect the equipment as shown in
8120-4781.)
Figure 8-1 Equipment Setup
2. Check the flatness of the input R trace by comparing it with the trace in
NOTE The R trace will be 20 dB lower than the A and B trace due to the attenuator
on the R input. the flatness of the trace, however, should resemble that of the
A and B input traces.
Press
Preset Meas
3. Check the flatness of the input A trace by comparing it with the trace in
Press .
Meas A
4. Check the flatness of the input B trace by comparing it with the trace in
Move the A input cable to the B input and press
• If none of the input traces resembles
When All Inputs Look Bad" on page
Chapter 8
Figure 8-2
Figure
R AUTO SCALE
Scale Ref
Figure
8-7.
in terms of flatness. To examine each
8-1. (The through cable part number is
.
.
B
8-2, continue with
Receiver Troubleshooting
Check the R, A, and B Inputs
Figure 8-2.
Figure 8-2.
Figure 8-2.
"Troubleshooting
8-5