Rohde & Schwarz ESW Series, User Manual

Page: 119 / 759

Measurements and Result Displays
R&S
®
ESW
119 User Manual 1177.6298.02 ─ 08
●
"Input Selection" on page 122
Remote command:
[SENSe:]SCAN<sr>:NAME
on page 459
Range Start and Range Stop ← Configuring scan ranges
Defines the frequency range of the selected scan range.
To avoid overlapping scan ranges, the start and stop frequencies of the next and previ-
ous ranges are adjusted if necessary.
Tip: Make sure that the start and stop frequencies of the scan ranges are within the
global frequency range .
Remote command:
Start frequency:
[SENSe:]SCAN<sr>:STARt
on page 460
Stop frequency:
[SENSe:]SCAN<sr>:STOP
on page 461
Step Size ← Configuring scan ranges
Defines the frequency step size of the selected scan range that is applied during a
scan.
In case of a stepped scan, the value depends on the selected step mode .
●
When you have selected the automatic step mode, the step size is determined
automatically. It is not possible to change the step size manually (however, it is dis-
played in the corresponding table cell as a read-only value).
●
When you have selected the linear step mode, the step size is a value in Hz (a
measurement is performed every x
Hz).
Example: a step size of 4 kHz and a start frequency of 100 kHz does a measure-
ment at 100 kHz, 104 kHz, 108 kHz etc.
●
When you have selected the logarithmic step mode, the step size is a value in %
(the next measurement frequency is a percentage of the last frequency).
Example: a step size of 10 % and a start frequency of 100 kHz does a measure-
ment at 100 kHz, 110 kHz, 121 kHz etc.
For a time domain scan, the step size depends on the measurement bandwidth. It is
displayed in the "Step Size" table cell as a read-only value.
Remote command:
[SENSe:]SCAN<sr>:STEP
on page 460
Measurement Bandwidth ← Configuring scan ranges
Defines the measurement bandwidth (or resolution bandwidth) used for the measure-
ment.
You can define a different bandwidth for the bargraph and each scan range defined in
the scan table. The R&S
ESW displays an exclamation mark if the selected measure-
ment bandwidth is not compatible to the bandwidth required by CISPR for the corre-
sponding frequency range.
If you perform a scan that is not based on a scan table, the bandwidth for the scan is
the same as for the bargraph.
The final measurement uses the bandwidths defined in the scan table, or, if the scan is
not based on a scan table (
Current parameters), the bandwidth of the bargraph.
Test Automation