Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
493
User Manual 1178.8520.02 ─ 08
Restrictions
●
The "Gate Mode"
Level
is not supported for Rohde
&
Schwarz power sensors. The
signal sent by these sensors merely reflects the instant the level is first exceeded,
rather than a time period. However, only time periods can be used for gating in
level mode. Thus, the trigger impulse from the sensors is not long enough for a
fully gated measurement; the measurement cannot be completed. For details on
power sensors see
"Using a power sensor as an external power trigger"
●
For gated measurements, the maximum RBW is restricted to 3
MHz. If the current
RBW is larger when you enable gating, the RBW is automatically reduced to
3
●
For gated measurements in sweep mode, only external triggers are allowed as the
.
●
For gated measurements in sweep mode, only the "Gate Mode"
Edge
is supported.
Additionally, a delay time can be defined so that the first few measurement points after
the gate opening are ignored.
Figure 6-29: Effects of Gate mode, Gate delay and Gate length
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
FSV/A 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
FSV/A waits for the next external trigger event.
Trigger and gate configuration
