Quick Start Guide for 3680A/B Cable and Antenna Analyzer
Figure 3.4 Calibration Completion
3.2 Cable Test
3.2.1 Return Loss/VSWR Measurement
Return Loss/Voltage Standing Wave Ratio (VSWR) is a representation of the reflection characteristic. In
engineering applications, this Analyzer can test the return loss or VSWR of single-port or double-port
devices, which is separately shown as (1) and (2) in Figure 3.5.
( 1 )
Cable & Antenna Feeder System
( 2 )
Device Under Test
Match Load
Figure 3.5 Connection method for Return Loss/VSWR Measurement
3680A/B mainly tests RF cable. Take the cable with length of 25m, radio frequency of 2.1GHz and
VSWR of 1.05 as an example, this part makes a detailed instruction on test steps of return loss
(Measurement steps of return loss and VSWR test are the same, therefore, it only takes return loss
measurement as example here).
1. Press
【
MEAS
】
to enter the measurement menu;
2. Select [Return Loss] menu to set the current measurement format of instrument as “Return Loss”, as
shown in Figure 3.6.
In the real calibration process, open circuit, short circuit and load may be
measured by any sequence, without following that in the present example.
Select [Done] menu to finish the calibration after all three states are
calibrated.
CAUTION
