Rohde & Schwarz FSVA - Page 459

Instrument Functions
R&S
®
FSVA/FSV
459Operating Manual 1176.7510.02 ─ 09
External ← Trg/Gate Source
Defines triggering via a TTL signal at the "EXT TRIG/GATE IN" input connector on the
rear panel.
Remote command:
TRIG:SOUR EXT, see TRIGger<n>[:SEQuence]:SOURce on page 909
SWE:EGAT:SOUR EXT for gated triggering, see [SENSe:]SWEep:EGATe:SOURce
on page 854
Video ← Trg/Gate Source
Defines triggering by the displayed voltage.
A horizontal trigger line is shown in the diagram. It is used to set the trigger threshold
from 0 % to 100 % of the diagram height.
Video mode is only available in the time domain.
Remote command:
TRIG:SOUR VID, see TRIGger<n>[:SEQuence]:SOURce on page 909
SWE:EGAT:SOUR VID for gated triggering, see [SENSe:]SWEep:EGATe:SOURce
on page 854
RF Power ← Trg/Gate Source
Defines triggering of the measurement via signals which are outside the measurement
channel.
This trigger mode is available with detector board 1307.9554.02 Rev 05.00 or higher. It
is not available for input from the R&S Digital I/Q Interface (option R&S FSVA/FSV-
B17). If RF Power trigger mode is selected and digital baseband input is activated, the
trigger mode is automatically switched to "Free Run".
RF power triggers are not available together with the bandwidth extension option
R&S FSV-B160.
In RF Power trigger mode the instrument uses a level detector at the first intermediate
frequency. The detector threshold can be selected in a range between - 50 dBm and
-10 dBm at the input mixer. The resulting trigger level at the RF input lies within the
following range:
(-24dBm + RF Att ) ≤ Triggerlevel ≤ (+5dBm + RF Att), max. 30 dBm, for Preamp =
OFF
(-40dBm + RF Att ) ≤ Triggerlevel ≤ (-11dBm + RF Att), max. 30 dBm, for Preamp =
ON
with
500 MHz ≤ InputSignal ≤ 7 GHz
Note: If input values outside of this range occur (e.g. for fullspan measurements), the
sweep may be aborted and a message indicating the allowed input values is displayed
in the status bar.
A Trigger Offset, Trg/Gate Polarity and Trigger Holdoff can be defined for the RF trig-
ger to improve the trigger stability, but no hysteresis.
Instrument Functions - I/Q Analyzer