User`s guide

3-8 Chapter3
Theory of Operation and Troubleshooting
Troubleshooting
8. To measure Port 2 in the reverse state, press Preset, Meas, REFL: REV
S22 (A/R)
.
9. Make a note of the reading on the power meter.
10.Press Meas, REFL: REV S22 (B/R).
11.Press Seq, TTL I/O, TTL OUT, TESTSET I/O REV, 5, x1.
12.Make a note of the reading on the power meter.
13.To measure Port 3, make sure the analyzer is in a reverse state and
set the TESTSET I/O REV to 7.
14.Move the power sensor to Port 3.
15.Press Meas, REFL: REV S33 (B/R) .
16.Make a note of the reading on the power meter.
17.Compare the relative power at the test ports in question. If the power
indicated by the power meter is relative to the test port power, see the
following note; then proceed to the receiver section.
NOTE Port 1 will measure 9 dBm. Port 2 and 3 will measure −2 dBm.
Symptom 1: No RF Source at All Test Ports
The A3 source may be the problem. Refer to the standard documentation
for source problems. If the A3 source is verified and working, proceed to
“Symptom 2: No RF Source at Port 1” next.