6
Measure Distance to Fault (CAT Mode)
Starting with A.11.25 firmware, for the B
models, the FieldFox output power defaults to -15 dBm.
Required Equipment:
- LOAD with correct connector type and gender to
terminate the end of the DUT.
- Known length and cable type or Cable Loss
(dB/Meter) and velocity factor of the DUT.
- Optional phase stable jumper cable or adapter to
connect the beginning of the DUT to the FieldFox.
1. Connect any necessary jumper cable or adapter to the
FieldFox RF OUT port.
2. Press Preset then Preset
3. Then Mode then CAT
4. Then Measure 1 then Distance to Fault
5. Press Freq/Dist then Stop Distance and enter the
length of the DUT.
6. If a diplexer or other filter is in the measurement path,
press Meas Setup 4 then select Freq Mode then
Bandpass. Then press Freq/Dist and manually type
the Min Start Freq and Max Stop Freq frequencies.
7. Press Cal 5 and see the FieldFox User’s Guide.
8. Press Meas Setup 4 then DTF Cable Specifications.
9. Either press Edit/Save/Recall Cables or enter the
Velocity Factor and Cable Loss manually--using
Cable Corr [Manual]--of the DUT.
10. Connect the start end of the DUT to the FieldFox. The
DTF measurement is displayed.
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