R&S FSV-K7, Operating Manual, Page: 64 / 262

Analog Demodulation Option R&S FSV–K7
R&S
®
FSV-K7/K7S
64 Operating Manual 1176.7561.02 ─ 06
Trigger Offset ................................................................................................................ 66
Repetition Interval ......................................................................................................... 67
Trigger Hysteresis ......................................................................................................... 67
Trigger Holdoff ...............................................................................................................67
Trigger Source
Opens the "Trg Source" submenu to select the trigger source.
In "Analog Demodulation" mode, the next measurement is triggered if the selected
input signal exceeds the threshold specified using the "Trigger Level" softkey (see
"Trigger Level" on page 66). A periodic signal modulated onto the carrier frequency
can be displayed in this way. It is recommended that the measurement time covers at
least five periods of the audio signal.
For triggering with AM, FM, PM or RF trigger sources to be successful, the measure-
ment time must cover at least 5 periods of the audio signal.
Remote command:
TRIGger<n>[:SEQuence]:SOURce
on page 167
Free Run ← Trigger Source
The start of a sweep is not triggered. Once a measurement is completed, another is
started immediately.
Remote command:
TRIG:SOUR IMM
, see
TRIGger<n>[:SEQuence]:SOURce
on page 167
External ← Trigger 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 167
RF Power ← Trigger 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
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
Softkeys of the Analog Demodulation option