Rohde & Schwarz ESW Series, User Manual

Page: 138 / 759

Measurements and Result Displays
R&S
®
ESW
138 User Manual 1177.6298.02 ─ 08
APD vs CISPR APD
Note that the R&S ESW also provides an APD measurement for general purposes in
the spectrum application.
This general APD function does not comply with CISPR 16-1-1 in various aspects and
cannot be used for CISPR APD measurements.
Remote command:
CALCulate:STATistics:CAPD[:STATe]
on page 435
The result display is made up out of a diagram and a table.
●
The diagram contains a graphical representation of the measurement results (the
probability with which a particular amplitude occurs).
The x-axis represents the amplitude, the y-axis the (cumulative) probability.
●
The table ("Result Summary") contains the number of samples used in the calcula-
tion and, for each trace, the following values:
–
Average amplitude
– Peak amplitude
Configuring CISPR APD measurements
Most of the settings available in the CISPR APD application are similar to settings
already available in the receiver application or the spectrum application.
All parameters specific to the CISPR APD application are described below.
●
Frequency and span settings: are similar to those in the spectrum application.
Refer to the documentation of the spectrum application for a detailed description of
these parameters (including remote commands).
●
Amplitude settings: are similar to those in the spectrum application.
Refer to the documentation of the spectrum application for a detailed description of
these parameters (including remote commands).
●
Scale settings: are similar to those of the APD measurement available in the spec-
trum application.
Refer to the documentation of the spectrum application for a detailed description of
these parameters (including remote commands).
●
Preselector settings: are similar to those in the receiver application.
Refer to
Chapter 10.6.2, "Configuring the Preselector" , on page 149 for a detailed
description of these parameters (including remote commands).
●
Auto settings: are similar to those in the spectrum application.
Refer to the documentation of the spectrum application for a detailed description of
these parameters (including remote commands).
●
Bandwidth settings: are similar to those in the receiver application.
–
"Measurement Bandwidth" on page 101 (called "Analysis BW" in the CISPR
APD application, but it is the same)
– "Measurement Time" on page 100 (called "Acquisition Time" in the CISPR APD
application, but it is the same)
●
Sweep settings: are similar to those in the receiver application.
CISPR APD Measurements