Measurement Basics
R&S
®
FSW-K7
48
User Manual 1173.9240.02 ─ 17
other connected devices. Using the same trigger on several devices is useful to syn-
chronize the transmitted and received signals within a measurement.
For details on the connectors see the R&S
FSW "Getting Started" manual.
External trigger as input
If the trigger signal for the R&S
FSW is provided by an external reference, the refer-
ence signal source must be connected to the R&S
FSW and the trigger source must be
defined as "External" on the R&S
FSW.
Trigger output
The R&S
FSW can send output to another device either to pass on the internal trigger
signal, or to indicate that the R&S
FSW itself is ready to trigger.
The trigger signal can be output by the R&S
FSW automatically, or manually by the
user. If it is sent automatically, a high signal is output when the R&S
FSW has trig-
gered due to a sweep start ("Device Triggered"), or when the R&S
FSW is ready to
receive a trigger signal after a sweep start ("Trigger Armed").
Manual triggering
If the trigger output signal is initiated manually, the length and level (high/low) of the
trigger pulse is also user-definable. Note, however, that the trigger pulse level is
always opposite to the constant signal level defined by the output "Level" setting, e.g.
for "Level = High", a constant high signal is output to the connector until the "Send
Trigger" button is selected. Then, a low pulse is sent.
Providing trigger signals as output is described in detail in the R&S
FSW User Manual.
4.8 Analog Demodulation in MSRA/MSRT Operating
Mode
The Analog Demodulation application can also be used to analyze data in MSRA or
MSRT operating mode. The main difference between the two modes is that in MSRA
mode, an I/Q analyzer performs data acquisition, while in MSRT mode, a realtime
measurement is performed to capture data.
In MSRA/MSRT operating mode, only the MSRA/MSRT Master actually captures data;
the data acquisition settings for an Analog Demodulation application channel in MSRA/
MSRT mode configure the
analysis interval
, not an actual data capture from the input
signal.
In addition, a capture offset can be defined, i.e. an offset from the start of the captured
data to the start of the analysis interval for Analog Demodulation.
The currently used analysis interval (in seconds, related to measurement start) is indi-
cated in the window header for each result display.
Analog Demodulation in MSRA/MSRT Operating Mode
