Rohde & Schwarz R&S FSP Series, Operating Manual

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Operating Manual 1164.4556.12 - 06 4.209
R&S FSP Instrument Functions
TV and RF Trigger – Option R&S FSP-B6
4.7 TV and RF Trigger – Option R&S FSP-B6
The option TV and RF Trigger, R&S FSP-B6, enables the R&S FSP to trigger on TV
signals or on the presence of a RF carrier outside the resolution bandwidth.
For this purpose, the hardware board is equipped with a TV demodulator, which pro-
duces the trigger signals necessary for the analysis of TV signals. In addition to the
pure trigger function, the board also creates a demodulated CCVS video signal for
operation of external TV monitors. Apart from using the internal IF for creating the
trigger signals, the R&S FSP can also make use of an externally supplied CCVS sig-
nal; the corresponding connector is placed at the rear panel of the instrument.
In order to display different sections of a TV video signal, the R&S FSP derives sev-
eral trigger signals from the video signals. This allows triggering as well on the frame
repetition as on each line of the TV video signal.
Additionally, the option includes a broadband RF detector (bandwidth = 80 MHz),
which allows triggering within a 40 MHz range around the selected frequency (=
start frequency in the frequency sweep). Thus, the measurement of spurious emis-
sions, e.g. for pulsed carriers, is possible even when the carrier lies outside the
selected frequency span. This RF power trigger can be used as long as the RF sig-
nal at the input mixer is in the range of -10 dBm to -50 dBm. The resulting range for
the input signal at the RF input connector can be calculated using the following for-
mula:
The RF Power Trigger can be selected and configured in the TRIGGER menu
(TRIG) using the softkey RF POWER :
RF POWER The RF POWER softkey activates triggering of the measurement via signals which
are outside the measurement channel.
For this purpose the instrument uses a level detector at the first intermediate fre-
quency. 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
is calculated via the following formula:
The bandwidth at the intermediate frequency is 80 MHz. The instrument is triggered
as soon as the trigger threshold is exceeded within a 40 MHz range around the
selected frequency (= start frequency in the frequency sweep). Thus, the measure-
ment of spurious emissions, e.g. for pulsed carriers, is possible even when the car-
rier lies outside the selected frequency span.
Remote command:
TRIG:SOUR RFP
SWE:EGAT:SOUR RFP
MixerLevel
min
RFAtt PreampGain – + InputSignal MixerLevel
max
≤ ≤
RFAtt PreampGain – +
MixerLevel
min
RFAtt PreampGain – + InputSignal MixerLevel
max
≤ ≤
RFAtt PreampGain – +