Applications and Operating Modes
R&S
®
FSW
96
User Manual 1173.9411.02 ─ 19
4 Applications and Operating Modes
The R&S
FSW provides several applications for different analysis tasks and different
types of signals, e.g. W-CDMA, I/Q analysis or basic spectrum analysis. When you
activate 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 may be limited further by the available memory on the instru-
ment.
Independent vs correlating measurements
With the
conventional R&S
FSW Signal and Spectrum Analyzer
you can perform
several different measurements almost simultaneously. However, the individual meas-
urements are independent of each other -
each application captures and evaluates
its own set of data
, regardless of what the other applications do.
In some cases it may 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 Analog Demodulation application. If a spur or an unexpected
peak occurs, you may want to analyze the same data in the I/Q Analyzer to see the
real and imaginary components of the signal and thus detect the reason for the irregu-
lar signal. Normally when you switch to a different application, evaluation is performed
on the data that was captured by that application, and not the previous one. In our
example that would mean the irregular signal would be lost. Therefore, a second oper-
ating mode is available in the R&S
FSW: Multi-Standard Radio Analyzer (MSRA)
mode.
Multi-Standard Radio Analyzer mode
In
Multi-Standard Radio Analyzer (MSRA) mode
, data acquisition is performed once
as an I/Q measurement, and the captured data is then evaluated by any number of
applications for different radio standards. Data acquisition and global configuration set-
tings are controlled globally, while the evaluation and display settings can be config-
ured individually for each application. Using the Multi-Standard Radio Analyzer,
unwanted correlations between different signal components using different transmis-
sion standards can be detected. Thus, for example, an irregularity in a GSM burst can
be examined closer in the R&S
FSW 3G FDD BTS (W-CDMA) application to reveal
dependencies like a change in the EVM value.
Multi-Standard Realtime mode
In order to combine the advantages of the MSRA mode with its correlated measure-
ments and the gapless results provided by realtime measurements, a third operating
mode has been introduced: the
Multi-Standard Realtime (MSRT) mode
. This operat-
ing mode is only available if one of the realtime options (R&S
FSW-K85R/-U85R/-
K160R/-U160R) is installed.
