Rohde & Schwarz FSV3000, Руководство пользователя

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Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
488 User Manual 1178.8520.02 ─ 08
Triggers the measurement when the magnitude of the sampled I/Q data exceeds the
trigger threshold.
Remote command:
TRIG:SOUR IQP
, see
TRIGger[:SEQuence]:SOURce
on page 1129
RF Power ← Trigger Source
Defines triggering of the measurement via signals which are outside the displayed
measurement range.
For this purpose, the instrument uses a level detector at the first intermediate fre-
quency.
The "RF Power" trigger is available for input signals above 500 MHz. The trigger
(6 dB-) bandwidth is
±
250 MHz. For the R&S FSV3000 and input signals between
500 MHz and 7.5 GHz, the trigger bandwidth depends on the instrument's serial num-
ber, see data sheet.
When using the Direct Path , the RF power trigger is not available.
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 can 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".
If the bandwidth extension option R&S FSV3-B1000/-B600 is active, this trigger is not
available for bandwidths
≥
400 MHz.
Remote command:
TRIG:SOUR RFP
, see
TRIGger[:SEQuence]:SOURce
on page 1129
SWE:EGAT:SOUR RFP
for gated triggering, see
[SENSe:]SWEep:EGATe:SOURce
on page 1133
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 6.2.3.3, "How to work with a power sensor" , on page 368.)
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 6.2.3.2, "Power sensor settings" , on page 364 ).
●
"Trigger Level" on page 489
●
"Slope" on page 490
●
"Hysteresis" on page 490
●
"Trigger Holdoff" on page 490
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.
Trigger and gate configuration