Rohde & Schwarz ESW Series, Руководство пользователя

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Measurements and Result Displays
R&S
®
ESW
113 User Manual 1177.6298.02 ─ 08
If you have not yet performed a scan and peak search, the final measurement but-
ton is unavailable.
Selecting the scan type ............................................................................................... 113
Scan Count ..................................................................................................................113
Scan Parameter ...........................................................................................................113
Selecting the mode for time domain scans ................................................................. 114
Selecting the scan type
The R&S ESW provides several scan types. Depending on the selected scan type, the
R&S ESW applies different methods to evaluate the applied signal.
The following scan types are supported.
●
Stepped scan
Subsequent measurements on each individual frequency defined by the frequency
range and the frequency step size .
(
➙
"Scan Type" > "Stepped")
●
Time domain scan
Simultaneous measurements based on FFT operations on all individual frequen-
cies in the frequency range you have defined. The frequency step size is variable
because it depends on the selected measurement bandwidth.
(
➙
"Scan Type" > "TDomain")
●
Fixed frequency scan
Measurement on a single frequency and display of the results in the time domain.
This mode is designed for measurements where the signal has to be monitored
over time (for example click rate analysis).
(
➙
"Fixed Frequency" > "On")
When you turn on fixed frequency scans, scans in the frequency domain are not
available.)
Remote command:
[SENSe:]FREQuency:MODE
on page 453
Scan Count
Defines the number of scans to be performed in a single measurement. The displayed
trace represents an average over the scan count.
When you measure continuously, the R&S ESW calculates a moving average over the
scan count.
The scan count is always the same as the "Bargraph Count" (and vice versa). The
"Bargraph Count" defines the number of bargraph measurements performed in a single
sweep.
Note that a scan count = 0 is not possible. The same applies to the bargraph count.
A scan count is not possible for Fixed Frequency Scans .
Remote command:
[SENSe:]SWEep:COUNt
on page 461
Scan Parameter
Turns the scan table on and off.
Test Automation