Triggering the Sweep - Analyzer R&S ESCI
1166.6004.12 4.100 E-1
Option R&S FSP-B6 – TV and RF Trigger
The option TV and RF Trigger, R&S FSP-B6, enables the R&S ESCI 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 produces 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 ESCI can also make use of an externally supplied
CCVS signal; 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 ESCI derives several 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 = 12 MHz), which allows triggering
within a 6 MHz range around the selected frequency (= start frequency in the frequency sweep). Thus,
the measurement of spurious emissions, 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 signal 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 formula:
eampGainRFAttMixerlevelSignalInputeampGainRFAttMixerlevel PrPr
maxmin
−+≤≤−+
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.
The R&S ESCI uses a level detector at the first IF. The detector's threshold
can be selected from values between –50 dBm and -10 dBm at the input
mixer. The range of the input signal to which the trigger responds is
calculated using the following formula.
eampGainRFAttMixerlevelSignalInputeampGainRFAttMixerlevel PrPr
maxmin
−+≤≤−+
The bandwidth at the IF is 12 MHz. Triggering starts when the trigger
threshold is exceeded in a range of 6 MHz around the frequency selected (=
start frequency for frequency sweep). This allows spurious emissions, e.g.
with pulsed carriers, to be measured, even if the carrier itself is outside the
frequency display range.
IEC/IEEE-bus command: TRIG:SOUR RFP
SWE:EGAT:SOUR RFP
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