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Measure Return Loss (CAT Mode)
Starting with A.11.25 firmware, for the B
models, the FieldFox output power defaults to -15 dBm.
Return loss can be thought of as the absolute value of
the reflected power as compared to the incident power.
When measuring an OPEN or SHORT, all incident power
is reflected and 0 dB return loss is displayed.
When measuring a LOAD, very little power is reflected
and values of greater than 40 dB are displayed.
1. Connect the Device Under Test (DUT).
2. Select Preset then
FieldFox to known settings.
3. Select Mode then
4. Then Measure 1 then
5. Press Freq/Dist and enter
values of the measurement.
6. Press Meas Setup 4 then
appropriate settings before calibrating.
7. Disconnect the DUT and press Cal 5 then follow the
calibration prompts.
8. Reconnect the DUT (cable to be tested).
Preset (Factory)
CAT
(Cable and Antenna Test)
Return Loss
Start
Settings
3
Returns the
Stop
and
frequency
to make
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