Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

Traces - Analyzer
ESIB
DETECTOR
SAMPLE
The DETECTOR SAMPLE softkey selects the sample detector.
It is used for measuring uncorrelated signals such as noise. The power can
be determined by means of fixed correction factors for evaluation and the log
amplifier.
IEC/IEEE-bus command
:[SENSe:]DETector SAMPle
DETECTOR
RMS
The DETECTOR RMS softkey activates the rms detector.
The rms detector gives the true power of the signal irrespective of the
waveform. The mean of the squares of all level samples is formed as a pixel
is swept. The sweep time, therefore, determines the number of values
averaged and, with increasing sweep time, better averaging is obtained. The
rms detector is therefore an alternative to averaging over several sweeps
(see TRACE AVERAGE).
In the time domain (SPAN = 0), the rms detector is only available for sweep
times ≥ 5 ms. Moreover, the combination of the rms detector with the
pretrigger function and the gaped sweep function is not permissible.
The video bandwidth has to be set to at least 10 times the resolution
bandwidth (RBW) so that the rms value of the signal is not invalidated by
video filtering.
IEC/IEEE-bus command
:[SENSe:]DETector RMS
DETECTOR
AVERAGE
The DETECTOR AVERAGE softkey activates the average detector.
In contrast to the rms detector, the average detector supplies the straight
average of all the level sampleds as a pixel is swept over.
The same restrictions as those of the rms detector apply (see above).
IEC/IEEE-bus command
:[SENSe:]DETector AVERage
DETECTOR
AC VIDEO
The DETECTOR AC VIDEO softkey activates the AC VIDEO detector.
Irrespective of the signal form, the AC VIDEO detector always supplies the
AC component of the signal. For this purpose the difference is formed of all
maximum and minimum level values collected during the runtime of the pixel
/ the set measurement time. The sweep / measurement time therefore
determines the number of values to be considered, so the AC component is
determined more accurately with increasing sweep / measurement time. The
AC VIDEO detector can thus be used as an alternative for the detection of
modulated signals.
The softkey is available only if the instrument is equipped with the linear video
output (option ESIB-B1).
IEC/IEEE-bus command :[SENSe:]DETector ACVideo
1088.7531.12 4.234 E-15