R&S ZVH
Cable and Antenna Test Mode
Configuring Cable and Antenna Tests
Operating Manual 1309.6946.12 - 09
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2.2.5 Setting and Triggering the Sweep
When setting up the sweep you have to deal with several parameters that are
interdependent. For easy and quick access, most of these parameters are combined in
the sweep menu.
2.2.5.1 Setting the Measurement Bandwidth
The measurement bandwidth determines the noise figure of the receiver. Small
bandwidths result in higher measurement dynamics for S21 measurements. However,
small bandwidths cause longer measurement times because of the settling time of the
filter.
Possible bandwidths are between 100 Hz and 100 kHz in a 1-3 sequence.
► Press the SWEEP/BW key.
In its default state, the R&S ZVH selects the bandwidth automatically ("Auto Meas
BW" softkey). In that state, the bandwidth is coupled to the span.
The default setting is a compromise between measurement speed and good
performance.
► Press the "Manual Meas BW" softkey.
The R&S ZVH opens an input field to define the measurement bandwidth.
► Enter the measurement bandwidth you want to work with.
As an indicator that the BW is no longer coupled to the span, the R&S ZVH
displays a red dot in front of the BW item in the hardware settings.
2.2.5.2 Selecting the Sweep Mode
The sweep mode is the way the R&S ZVH performs the measurement.
In its default state, the R&S ZVH measures continuously. In this mode, the R&S ZVH
automatically repeats the sweep in the defined range of the horizontal axis (frequency
or time) and updates the trace accordingly after it has finished with one sweep.
In some cases it may be sufficient to get the results over a single sweep only, e.g. if a
particular trigger condition is met. In single sweep mode, the R&S ZVH performs the
sweep a certain number of times (depending on the number of averages you have set)
over the defined range of the horizontal axis (frequency or time) and then stops
measuring. It performs another sweep only after you tell it to.
