Portable spectrum analyzer Arinst SSA-TG R2 6 April 2019
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18
igure 20 Display of the reflection coefficient graph
Note. After calibration, the setting of the frequency range at which the reflection coefficient is investi-
gated is unavailable in
S11
mode. Set the frequency range of the signal under study before calibration.
Note. When connecting other connectors and cables, it is necessary to re-calibrate.
7.7.6. To exit the reflection measurement menu
S11
, press the button (14)
«MENU»
.
7.8.
Setting parameters and measuring the standing wave ratio
SWR
7.8.1
To measure the standing wave ratio, you must select the
SWR
mode (Figure 21).
igure 21 Enabling SWR mode
Note. The standing wave ratio is measured in
SWR
mode. The graph will be displayed with the vertical
axis as a numerical standing wave ratio. The horizontal axis shows the specified frequency range of the
signal.
7.8.2. Set the desired level of attenuation of the input attenuator
Input Atten
in the range of 0 to -30
dB. Setting the parameter is performed by “scrolling” the values to the fixed selected area.
Attention! The use of small values of the input attenuator requires special attention, since a
signal exceeding 10 dBm can damage the input circuit of the device!
Note. Use external attenuators if necessary.
