R&S FSW Series, Руководство пользователя

Страница: 484 / 1450

Common Measurement Settings
R&S
®
FSW
484 User Manual 1173.9411.02 ─ 43
For this purpose, the instrument uses a level detector at the first intermediate fre-
quency.
The input signal must be in the frequency range between 500 MHz and 8 GHz.
The resulting trigger level at the RF input depends on the RF attenuation and preampli-
fication. For details on available trigger levels, see the instrument's data sheet.
Note: If the input signal contains frequencies outside of this range (e.g. for fullspan
measurements), the sweep may be aborted. A message indicating the allowed input
frequencies is displayed in the status bar.
A "Trigger Offset", "Trigger Polarity" and "Trigger Holdoff" (to improve the trigger stabil-
ity) can be defined for the RF trigger, but no "Hysteresis".
Remote command:
TRIG:SOUR RFP
, see
TRIGger[:SEQuence]:SOURce
on page 1053
SWE:EGAT:SOUR RFP
for gated triggering, see
[SENSe:]SWEep:EGATe:SOURce
on page 1060
Power Sensor ← Trigger Source
Uses an external power sensor as a trigger source. This option is only available if a
power sensor is connected and configured.
(See Chapter 8.2.3.3, "How to Work With a Power Sensor" , on page 379.)
If a power sensor is selected as the trigger mode, the following softkeys are not availa-
ble; these settings are configured in the "Power Sensor Config" dialog box (see
Chap-
ter 8.2.3.2, "Power Sensor Settings" , on page 375 ).
●
"Trigger Level" on page 484
●
"Slope" on page 486
●
"Hysteresis" on page 485
●
"Trigger Holdoff" on page 486
Note: For Rohde & Schwarz power sensors, the "Gate Mode" Lvl is not supported. 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.
Remote command:
TRIG:SOUR PSE
, see
TRIGger[:SEQuence]:SOURce
on page 1053
SWE:EGAT:SOUR PSE
for gated triggering, see
[SENSe:]SWEep:EGATe:SOURce
on page 1060
Time ← Trigger Source
Triggers in a specified repetition interval.
Remote command:
TRIG:SOUR TIME
, see
TRIGger[:SEQuence]:SOURce
on page 1053
Trigger Level
Defines the trigger level for the specified trigger source.
For gated measurements, this setting also defines the gate level.
For details on supported trigger levels, see the data sheet.
Trigger and Gate Configuration