Instrument Tour
R&S
®
FSW
55
Getting Started 1338.4102.02 ─ 08
The upper BNC connectors BASEBAND INPUT I and BASEBAND INPUT Q are
used to input:
●
Single-ended signals
●
The positive signal input for differential signals
●
Input from active Rohde
&
Schwarz probes (see data sheet)
The lower BNC connectors
Ī
and
Ǭ
are used to input the negative signal for differ-
ential signals.
R&S
FSW85
The R&S
FSW85 provides only two connectors; differential input is not sup-
ported.
Complex signal input (I+jQ)
For complex signal input (I+jQ), always use two identical cables for the I and
Q connectors (same length, same type, same manufacturer). Otherwise,
time delay or gain imbalance can occur between the different cables, which
cannot be calibrated.
All connectors have a fixed impedance of 50
Ω. Do not overload the input. For
maximum allowed values, see the data sheet.
Input via the Analog Baseband Interface can be enabled in the I/Q Analyzer, the
Analog Demodulation application, or in one of the optional applications that proc-
ess I/Q data (where available).
For more information on the Analog Baseband Interface, see the R&S
FSW I/Q
Analyzer and I/Q Input User Manual.
Rear Panel View
