Common Measurement Settings
R&S
®
FSW
314
User Manual 1173.9411.02 ─ 19
6.2 Data Input and Output
The R&S
FSW can analyze signals from different input sources and provide various
types of output (such as video or trigger signals).
Receiving Data Input and Providing Data Output
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External Generator Control (Option R&S
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6.2.1 Receiving Data Input and Providing Data Output
The R&S
FSW can analyze signals from different input sources and provide various
types of output (such as noise or trigger signals).
6.2.1.1
RF Input Protection
The RF input connector of the R&S
FSW must be protected against signal levels that
exceed the ranges specified in the data sheet. Therefore, the R&S
FSW is equipped
with an overload protection mechanism. This mechanism becomes active as soon as
the power at the input mixer exceeds the specified limit. It ensures that the connection
between RF input and input mixer is cut off.
When the overload protection is activated, an error message is displayed in the status
bar ("INPUT OVLD"), and a message box informs you that the RF Input was discon-
nected. Furthermore, a status bit (bit 3) in the
STAT:QUES:POW
status register is set.
In this case you must decrease the level at the RF input connector and then close the
message box. Then measurement is possible again. Reactivating the RF input is also
possible via the remote command
6.2.1.2
RF Input from the Analog Baseband Connector
RF input can not only be taken from the RF INPUT connector on the front panel of the
R&S
FSW. If the optional Analog Baseband Interface (R&S
FSW-B71) is installed and
active for input, an RF signal can be input at the BASEBAND INPUT I connector and
redirected from there to the RF input path. A transducer is activated to compensate for
the additional path of the redirected signal. The signal is then processed as usual in
the frequency and time domain as for any other RF input.
This is useful, for example, to perform frequency sweep measurements with (single-
ended or differential) active probes, which can also be connected to the BASEBAND
INPUT I connector.
Frequency sweep measurements on probe input
You can perform RF measurements (measurements in the time or frequency domain)
by connecting a probe to the BASEBAND INPUT I connector and switching the input
Data Input and Output
