Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
187
User Manual 1321.1011.02 ─ 11
Pulsed signals can be measured by this method, if the gate delay and gate length
are selected in a way that the measurement is only performed while the pulse is
active. Gated measurements are possible in the frequency domain (span > 0) and
the time domain (span = 0), but it is available only in combination with an external
gate signal.
Including a delay time
When you are using a video trigger in the time domain or an external trigger, you can
delay the start of the measurement with respect to the trigger event by entering a delay
time. In this way, you can include time differences between the trigger event and the
measurement.
The range of the trigger delay is from 0 s to 100 s. The resolution depends on the sub-
range.
Trigger delay
Resolution
0 ms to 1 ms
10
µ
1 ms to 10 ms
100
µ
10 ms to 100 ms
1 ms
100 ms to 1 s
10 ms
1s to 10s
100 ms
10s to 100s
1 s
1. Press [SWEEP] key.
2. Select "Trigger" softkey.
3. Select the "Trigger Delay" menu item.
The R&S Spectrum Rider opens an input field to define the trigger delay.
4. Enter the delay time you need.
Defining the trigger level
When you are using the video trigger, you have to define a trigger level. The trigger
level is a percentage of the reference level. A trigger level of 100 % is the same as the
reference level. A trigger level of, e.g. 50 % corresponds to the middle of the vertical
axis. The R&S Spectrum Rider indicates the video trigger level with a triangle.
1. Press [SWEEP] key.
2. Select "Trigger" softkey.
3. Select the "Video" menu item.
The R&S Spectrum Rider opens an input field to define the trigger level.
4. Enter the trigger level.
The R&S Spectrum Rider shows the trigger level by adding a horizontal line to the
diagram area.
Configuring Spectrum Measurements
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