Agilent Technologies 8753ES Option 011 Service Manual page 42

Performance Tests
7. Receiver Magnitude Frequency Response
14.Press
B
Meas
15.Press
Sweep Setup
16.Write the marker reading in the "B Input Power" column on the performance test
record.
17.Repeat steps 15 and 16 for the other CW frequencies listed on the performance test
record.
18.For each CW frequency, determine which channel input reading shows the greatest
difference:
• power meter versus R
• power meter versus A
• power meter versus B
Refer to the first line for an example listed in the performance test record. Write the
greatest difference in the space provided on the performance test record.
NOTE The final results represent the worst case magnitude frequency response for
all the analyzer receiver inputs at the selected frequencies.
In Case of Difficulty
1. Suspect poor tracking between the ports of the power splitter if all receiver inputs fail.
Try to repeat the test with another power splitter.
2. Suspect source drift if receiver inputs A and B fail this test at any frequency. Connect
the equipment as shown in
at the frequency of interest. Repeat the test for the receiver input(s) that failed before.
3. Perform "Sampler Magnitude and Phase Correction Constants (Test 53)" on page
Repeat this performance test.
4. Consult Chapter 8 , "Receiver Troubleshooting,"
2-26
to start measuring the power delivered to receiver input B.
CW FREQ
300
Figure 2-10
.
k/m
(or Figure 2-11); set the analyzer source power
for troubleshooting information.
3-19.
Chapter 2