Advertisement
CAT (Cable and Antenna Test) Mode
1-Port Cable Loss Measurements
1-Port Cable Loss Measurements
While all cables have inherent loss, weather and time will deteriorate cables
and cause even more energy to be absorbed by the cable. This makes less
power available to be transmitted.
A deteriorated cable is not usually apparent in a Distance to Fault
measurement, where more obvious and dramatic problems are identified. A
Cable Loss measurement is necessary to measure the accumulated losses
throughout the length of the cable.
A 2-port Insertion Loss measurement is usually more accurate than a 1-port
Cable Loss measurement. However, to perform a 2-port Insertion Loss
measurement, both ends of the cable must be connected to the FieldFox.
In high-loss conditions, a Cable Loss measurement becomes 'noisy' as the
test signal becomes indistinguishable in the FieldFox noise floor. This can
occur when measuring a very long cable and using relatively high
measurement frequencies. To help with this condition, use High Power
(page
How to make a 1-port Cable Loss Measurement
1. Press Preset then Preset.
2. Then
3. Connect the cable to be tested.
4. Press Freq/Dist and enter
5. Press Sweep 3 then
6. Remove the cable to be tested.
7. Press Cal 5, then
8. Follow the prompts to perform calibration at the end of the jumper cable
60
57) and Averaging
More
then
Cable Loss (1-Port)
measurement.
Min Swp
trace is visible on the screen. The amount of time that is required increases
with longer cable lengths. Learn more in the Supplemental Online Help at:
https://www.keysight.com/us/en/lib/resources/service-manuals/keysigh
t-fieldfox-library-help-and-manuals-2153870.html
Library, Help and Manuals – FieldFox Online Supplemental Help).
Mechanical
or adapter. Learn more about Calibration in
Calibration" on page 127
(page
54).
Start
and
Stop
frequency values of the
Time. Increase the Sweep Time until a stable
Cal.
"How to Perform a
Keysight N9938-90006 User's Guide
(Keysight FieldFox
Hide quick links:
Advertisement
Chapters
