Stepped Scans In The Frequency Domain - R&S ESR Series User Manual

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R&S ESR
The scan can be performed as a single scan or continuously. In the case of single scan
it is stopped when the stop frequency is reached. The continuous scan can be interrup-
ted or terminated any time.
The maximal number of measured frequencies is limited to 4.000.000 per detector. The
data can be stored for postprocessing. If the scan subranges are defined so that more
than the possible values would be measured, a respective message is output upon the
scan start. Afterwards the scan is performed up to the maximum value.
Figure 5-1: Scan on selected frequencies showing gaps in the trace
The R&S ESR offers three types of scans:
●
Stepped scan in the frequency domain
In stepped scan mode, step width and frequency spacing (step mode) can be
selected.
●
Time domain scan in the frequency domain
In time domain measurement systems, up to 30 MHz of the spectrum at the
receiver input are measured in parallel by using fast fourier transform (FFT) of fre-
quency sections. Time Domain scans require options R&S ESR-K53 and
R&S ESR-B50.
●
Fixed frequency scan on a single frequency
This scan is carried out on a fixed frequency. It is used to examine the time charac-
teristics of interferences, e.g. click analysis.
● Stepped Scans in the Frequency
● Time Domain Scans in the Frequency
● The Scan
● Scan on a Fixed
5.1.3.1

Stepped Scans in the Frequency Domain

In stepped scan mode, the step width and the frequency spacing (step mode) can be
selected. Linear, logarithmic or automatic frequency spacing is available. In automatic
mode, the step width is selected so that it is always smaller than the bandwidth.
EMI measurements may involve much time. Time saving procedures are explained in
Chapter 5.1.4, "Peak List and Data
measurement time by reducing the number of quasipeak measurements to a minimum.
User Manual 1175.7068.02 ─ 12
Table..................................................................................................... 146
Frequency.................................................................................. 148
Reduction",
Measurements and Result Displays
Domain.............................................................145
Domain.....................................................146
on page 148. They reduced the total
Receiver Mode
145