Instrument Function
R&S
®
SMU200A
439Operating Manual 1007.9845.32 ─ 15
Baseband Input General Settings
State
Switches On/Off the feeding of an external analog or digital signal into the signal path.
An external analog signal is A/D-converted and fed into path A or path B or into both
paths simultaneously.
As an alternative, analog signals can be directly applied to the I/Q modulator. In this case,
the settings are made in the I/Q Mod menu (see section chapter 5.6, "I/Q Modulation - I/
Q Mod Block", on page 275).
If no signal is applied at the input selected with parameter "Mode" an error message is
displayed.
"On"
Switches On the external I/Q input signal of the corresponding BB Input
block. The input symbols display the active signal mode (digital DIG I/Q
IN or analog I and Q).
"Off"
Switches Off the external I/Q input signal of the corresponding BB Input
block.
SCPI command:
[:SOURce]:BBIN:STATe on page 697
Mode
Selects the signal mode (analog or digital) of the external input signal for the BB Input
block.
"Analog Input"
An external analog baseband signal ("BB Input") is fed in via the "I" and
"Q" analog inputs.
The block diagram shows the BNC connectors at the "BB Input" block.
The signals are A/D-converted using the 100MHz system clock and fed
into the digital signal path.
The external analog input signal for the "BB Input" block and the external
analog input signal for the I/Q modulator are both fed in via the "I" and
"Q" analog inputs. The instrument therefore responds as follows if either
of the two modes is activated:
The I/Q modulator is automatically set to "Internal Baseband" when the
"BB Input" block is switched on.
"Digital Input"
The external digital baseband signal is fed into the digital signal path via
the Digital Input connector.
The internal signal processing is based on a sample rate of 100MHz.
External input signals with sample rates less than 100MHz are upsam-
pled. The external sample rate can be estimated or defined by the user
in the appropriate entry fields.
Note: This item is available only with BBinS Revision 05.02 or higher and
BBinR Revision 02.06 or higher (see menu Setup-Hardware Config).
SCPI command:
[:SOURce<hw>]:BBIN:MODE on page 693
EX-I/Q-Box Settings…
Digital Input with connected R&S EX-IQ-Box only.
External Baseband Signal - Baseband Input
To Next Page
Loading...
