Measurement Basics
R&S
®
FSW-K7
32User Manual 1173.9240.02 ─ 17
Triggering is always DC-coupled. Therefore triggering is possible directly to the point
where a specific carrier level, phase or frequency is exceeded or not attained.
4.5 AF Filters
Additional filters applied after demodulation help filter out unwanted signals, or correct
pre-emphasized input signals. A CCITT filter allows you to evaluate the signal by simu-
lating the characteristics of human hearing.
4.6 Time Domain Zoom
For evaluations in the time domain, the demodulated data for a particular time span
can be extracted and displayed in more detail using the "Time Domain Zoom" function.
This is useful if the measurement time is very large and thus each sweep point repre-
sents a large time span. The time domain zoom function distributes the available
sweep points only amoung the time span defined by the zoom area length. The time
span displayed per division of the diagram is decreased. Thus, the display of the
extracted time span becomes more precise.
Fig. 4-2: FM time domain measurement with a very long measurement time
AF Filters
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