Technical Tip
A-13
(c) Spikes where there are no components represent
faults. Record the distance and then examine the line at
that point for damage.
(d) The largest spike is usually due to the antenna.
Typically the trace after the antenna can be ignored
(Ghosting). Verify distance to antenna via WDM.
(3) Make sure that the fault location by replacing defective
component with 50 ohm load (calibration combo or dummy
load).
(a) Disconnect the component (cable, connector,
antenna).
(b) Connect the 50 ohm terminator to the open end of
the applicable cable.
(c) Do the Health Check again.
1) Make sure that the VSWR (Voltage Standing
Wave Ratio) or Return Loss test is PASS.
a) If the test still does not PASS, do the
distance to the fault test and continue
to move 50 ohm load to further isolate.
