Common Measurement Settings
R&S
®
FSW
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To indicate that a gate is used for the sweep, "GAT" and the gate source is displayed in
the channel bar.
Continuous gating
With common gating, a measurement is performed each time the trigger event occurs.
However, when using an external trigger, the measurement time for a single gate is
restricted by the repetition rate of the external trigger.
Now, a new function in the R&S
FSW allows you to perform a number of measure-
ments periodically after each external trigger event. This function can speed up the
measurement significantly. After the first external trigger event, a specified number of
gate periods are generated internally, in a specified interval, without requiring addi-
tional trigger events. Only after the specified number of measurements have been per-
formed, the R&S
FSW waits for the next external trigger event.
Example:
Figure 8-33: Continuous gating for a gate period count of 9
Continuous gating is useful, for example, if you want to measure a periodic signal
which occurs after a specific trigger event. Using gate periods, you can average the
individual periods of the signal for several trigger events.
Continuous gating can also improve the measurement speed, as you no longer have to
wait for the next external trigger events, but can measure several periodic bursts after
a single trigger event.
Settings for continuous gate periods are defined in a separate tab of the "Trigger / Gate
Config" dialog box (see
Chapter 8.6.2.3, "Continuous Gate Settings"
Trigger and Gate Configuration
