Common Measurement Settings
R&S
®
FSW
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User Manual 1173.9411.02 ─ 19
5. If the results are as expected, close the dialog box to keep the changes perma-
nently. Otherwise, correct the settings as necessary.
6.6.3.2
How to Configure a Triggered Measurement
To define a time trigger:
1. In the "Trigger and Gate" dialog box, define the "Trigger Source" = "Time".
2. Define the "Repetition Interval": the time after which a new measurement is started.
To define an external trigger:
1. Connect an external device that will provide the trigger signal to one of the
TRIGGER INPUT connectors on the front or rear panel (for details see the
R&S
FSW "Getting Started" manual).
2. In the "Trigger and Gate" dialog box, define the "Trigger Source" = "External".
3. If you are using one of the variable TRIGGER INPUT/OUTPUT connectors, you
must define their use as input connectors. In the "Trigger In/Out" tab of the "Trigger
and Gate" dialog box, set the corresponding trigger to "Input".
(Note: Trigger 2 is on the front panel, Trigger 3 is on the rear panel.)
4. Configure the external trigger as described for the other power triggers.
To define a power trigger:
1. In the "Trigger and Gate" dialog box, define the "Trigger Source" = "IF Power" or
"Video". Note that the video signal corresponds to the envelope of the IF signal: it
has been processed by the resolution and video filters and the selected detector.
2. Define the "Trigger Level": the power level at which the measurement will start.
For a "Video" trigger source you can move the level line graphically to define the
level. If you define the value numerically, you must enter a percentage of the full
diagram height as the level.
3. Define whether the signal must cross the trigger level on a falling or on a rising
edge ("Slope") to trigger the measurement.
4. To start the measurement with a time delay, define a "Trigger Offset".
5. To reject triggers due to noise or jittering in the signal, define a "Hysteresis" that is
larger than the expected noise or jittering. After the previous trigger, the signal
must exceed this threshold before the next level crossing triggers a new measure-
ment.
6. To skip multiple triggers in a burst, define a "Holdoff" time that must pass between
two triggers. The holdoff time should be slightly larger than the burst.
Trigger and Gate Configuration
