User’s manual
6.2. Testing RF cables
A cable under test is connected to the RP-SMA socket if the IT-24. The far end of the
cable should be terminated with a 50-Ohm dummy load. The load should have low
SWR (less than 1.2) at working frequencies.
A 1.8 meter long cable (diameter
approximately 5 mm) was connected to
the tester during the first experiment.
The measured SWR is under 1.3 in the
whole range of 2.4 to 2.5 GHz, which
indicates a good quality of the cable.
Since the characteristic impedance of
the cable is not exactly 50 Ohm, the SWR
curve is not too smooth.
Another cable shows much larger values
of the SWR (up to 1.6). This cable is
unlikely to be used for connecting
equipment in the 2.4 GHz ISM band.
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