Applications and operating modes
R&S
®
FSWP-B1
20
User Manual 1177.5862.02 ─ 09
4
Applications and operating modes
The R&S
FSWP provides several applications for different analysis tasks and different
types of signals, e.g. WCDMA, I/Q analysis or basic spectrum analysis. When you acti-
vate an application, a new measurement channel is created which determines the
measurement settings for that application. The same application can be activated with
different measurement settings by creating several channels for the same application.
Each channel is displayed in a separate tab on the screen.
The maximum number can be limited further by the available memory on the instru-
ment.
Independent vs correlating measurements
With the
conventional R&S
FSWP signal and spectrum analyzer
, you can perform
several different measurements almost simultaneously. However, the individual mea-
surements are independent of each other -
each application captures and evaluates
its own set of data
, regardless of what the other applications do.
Sometimes, it can be useful to
analyze the exact same input data using different
applications
. For example, imagine capturing data from a base station and analyzing
the RF spectrum in the Modulation Analysis application. If a spur or an unexpected
peak occurs, possibly you want to analyze the same data in the I/Q Analyzer. There,
you see the real and imaginary components of the signal and can thus detect the rea-
son for the irregular signal. Normally, when you switch to a different application, evalu-
ation is performed on the data that was captured by that application, and not the previ-
ous one. In our example, the irregular signal is lost. Therefore, a second operating
mode is available in the R&S
FSWP: Multistandard radio analyzer (MSRA) mode.
Multistandard radio analyzer mode
In
multistandard radio analyzer (MSRA) mode
, data acquisition is performed once
as an I/Q measurement by a primary application. The captured data is then evaluated
by any number of secondary applications for different radio standards. Data acquisition
and global configuration settings are controlled globally, while the evaluation and dis-
play settings can be configured individually for each secondary application. Using the
multistandard radio analyzer, unwanted correlations between different signal compo-
nents using different transmission standards can be detected. Thus, for example, an
irregularity in a GSM burst can be examined closer in the R&S
FSWP 3G FDD BTS
(WCDMA) secondary application. There you can analyze dependencies like a change
in the EVM value.
Distinct operating modes
Although the applications themselves are identical in all operating modes, the handling
of the data between applications is not. Thus, the operating mode determines which
secondary applications are available and active. Whenever you change the operating
mode, the currently active measurement channels are closed. The default operating
mode is "Signal and Spectrum Analyzer" mode; however, the presetting can be
changed.