5
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 (Factory)
3.
Then
Mode
then
CAT
4.
Then
Measure 1
then
Distance to Fault (dB)
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.
