Fault Location Mode
24
Note:
If the SiteHawk Analyzer is calibrated with a phase stable
cable connected to its antenna port, do not remove the cable. Con-
nect it to the cable to be tested.
13. Wait at least 10 seconds for the sweep to update.
14. Press the Menu icon, then Press MEM menu icon. Press CONTINUE and
verify Trigger toggles to HOLD.
Interpreting the Fault Location Measurement
The graph below shows a typical Fault Location measurement for an antenna
system. The table lists typical component return losses.
Figure
13
Interpreting Fault Location Measurement
Typical Component Return Loss
Antenna at Resonance
-14 dB
Connector
-25 dB
Jumper
-35 dB
Lightning Protector
-25 dB
Transmission Line
-30 dB
Each connector or jumper will show as a spike. If it is larger than the typical
value, check the connector for damage.
Spikes where there are no components represent faults. Note the distance and
check the line at that point for damage.
The largest spike is usually due to the antenna. Typically the trace after the
antenna can be ignored.