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Tel: 886.909 602 109 Email: [email protected]
Figure 3.10 DTF Return Loss Test Connection Diagram
12. Press
【
Marker
】
to enter the marker menu, Marker 1 has been turned on at this time. Select [Peak] menu to place Marker 1
onto peak value (namely fault point), in order to read out the location of fault point, that is the distance from fault point to
measurement port of Analyzer. At 25m length of this cable exampled here, we measure that DTF return loss is 2.359 which
indicates that the length of cable is 25m. Or, you can check DTF return loss at each position by moving the marker. Fault points
measured here are shown in Figure 3.11.
Figure 3.11 Measurement on Length of Cable
3.3.
Antenna Test
S3101 series
can test the return loss/VSWR of general passive receiving antenna. This part will introduce the measurement process of
passive antenna by taking terminal antenna TZD-P021Z05-195 as an example. Terminal antenna TZD-P021Z05-195 is kind of receiving
antenna with frequency of 2,100MHz, whose standing wave is minimum at 2,100MHz in theory.
1. Press
【
Meas
】
to choose “Return Loss” or “VSWR” as the measurement format of Analyzer.
2. Press
【
Freq
】
to set instrument frequency measurement range by contrasting with receiving frequency range of the antenna to
be received; if the frequency range of antenna is not clear, users can measure return loss/VSWR according to system default
measurement range (1MHz - 4MHz), which is set to 2GHz - 2.2GHz here.
