R&S FSH Spectrum Analyzer Mode
Configuring Spectrum Measurements
Operating Manual 1173.6275.12 - 30 108
► Press the SWEEP key.
► Press the "Trigger" softkey.
► Select the "Trigger Delay…" menu item.
The R&S FSH opens an input field to define the trigger delay.
► 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 FSH indicates the video trigger level with a triangle.
► Press the SWEEP key.
► Press the "Trigger" softkey.
► Select the "Trace Video" menu item.
The R&S FSH opens an input field to define the trigger level.
► Enter the trigger level.
The R&S FSH shows the trigger level by adding a horizontal line to the diagram
area.
Performing Gated Sweeps
When the external trigger is active, it is possible to perform a gated sweep.
► Press the SWEEP key.
► Press the "Trigger" softkey.
► Activate an external trigger.
Now that the external trigger is active, the "Gated Trigger" menu item becomes
available.
► Press the "Trigger" softkey again.
► Select the "Gated Trigger" menu item.
In order to get appropriate results, you have to set the gate delay and gate length in a
way that the measurement is active during the interesting part of the signal. You can
also modify the sweep time in order to match the horizontal axis to the length of the
signal and thus set the gate delay and gate length parameters more accurately.
The gate delay parameter defines the time between the trigger event and the
beginning of the actual measurement. The gate length defines the duration of the
measurement, before it is interrupted and the next gate signal is anticipated to resume
the measurement.
► Press the SWEEP key.
► Press the "Trigger" softkey.
► Select the "Gate Settings" menu item.
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