Anritsu S251C manual 4-11, Vswr, Measurements, log VSWR Maximum Return Loss =

Chapter 4 Measurements

The following trace is an example of an antenna return loss trace.

Figure 4-6. Antenna Return Loss Trace

Calculate the threshold value and compare the recorded Lowest Return Loss to the calcu- lated threshold value.

￿20 log ￿VSWR ￿ 1￿

Maximum Return Loss =

￿VSWR ￿ 1￿

NOTE: VSWR is the antenna manufacturer’s specified VSWR.

If the measured return loss is less than the calculated threshold value, the test fails and the antenna must be replaced.

4-11