Ronde & Schwarz 1304.0004K03, User Manual

Page: 340 / 1071

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
340 User Manual 1178.3370.02 ─ 11
External Trigger 1 ← Trigger Source
Data acquisition starts when the TTL signal fed into the trigger input connector of the
R&S
FPL1000 meets or exceeds the specified trigger level.
(See "Trigger Level" on page 341).
Remote command:
TRIG:SOUR EXT
See
TRIGger[:SEQuence]:SOURce
on page 774
SWE:EGAT:SOUR EXT
for gated triggering, see
[SENSe:]SWEep:EGATe:SOURce
on page 777
Video ← Trigger Source
Defines triggering by the video signal, i.e. the filtered and detected version of the input
signal (the envelope of the IF signal), as displayed on the screen.
Define a trigger level from 0 % to 100 % of the diagram height. The absolute trigger
level is indicated by a horizontal trigger line in the diagram, which you can also move
graphically to change the trigger level.
A fixed hysteresis of 10 % of the specified trigger value (in V) is applied to the video
trigger level automatically and cannot be changed.
Video mode is only available in the time domain, and not for I/Q-based data.
Remote command:
TRIG:SOUR VID
, see
TRIGger[:SEQuence]:SOURce
on page 774
IF Power ← Trigger Source
The R&S FPL1000 starts capturing data as soon as the trigger level is exceeded
around the third intermediate frequency.
For frequency sweeps, the third IF represents the start frequency. The trigger threshold
depends on the defined trigger level, as well as on the RF attenuation and preamplifi-
cation. A reference level offset, if defined, is also considered. The trigger bandwidth at
the intermediate frequency depends on the RBW and sweep type. For details on avail-
able trigger levels and trigger bandwidths see the instrument data sheet.
For measurements on a fixed frequency (e.g. zero span or I/Q measurements), the
third IF represents the center frequency.
This trigger source is only available for RF input.
For details on available trigger levels and trigger bandwidths, see the data sheet.
Note: Be aware that in auto sweep type mode, due to a possible change in sweep
types, the trigger bandwidth can vary considerably for the same RBW setting.
Remote command:
TRIG:SOUR IFP
, see
TRIGger[:SEQuence]:SOURce
on page 774
SWE:EGAT:SOUR IFP
for gated triggering, see
[SENSe:]SWEep:EGATe:SOURce
on page 777
Time ← Trigger Source
Triggers in a specified repetition interval.
See "Repetition Interval" on page 341.
Trigger and Gate Configuration