4 Input/Output Functions
Input/Output
This key only appears in models that support the RF Preselector, in other models, setting or querying
the SCPI will generate an error.
Preset It is set to Off when the selected mode is SA. If the selected mode is EMI Receiver, then it will be set
to On.
Backwards
Compatibility SCPI
INPut<1|2>:PRESelection[:STATe] ON|OFF
INPut<1|2>:PRESelection[:STATe]?
Included for R&S ESU compatibility
Initial S/W Revision A.05.01
I/Q
This feature is not available unless the "Baseband I/Q (Option BBA)" on page 157 is installed.
Selects the front-panel I/Q input ports to be the analyzer signal input. If I/Q is already selected, pressing
this key accesses the I/Q setup menu.
Key Path
Input/Output
Mode BASIC, CDMA2K, EDGEGSM, TDSCMDA, VSA89601, WIMAXOFDMA, LTE, LTETDD, LTEAFDD,
LTEATDD, DCATV, DTMB (CTTB),
DVB-T/H with T2, CMMB, ISDBT, WCDMA, VXA, CDMA1XEV
Example FEED AIQ
Notes Not all measurements support the use of the I/Q signal input. When I/Q is selected in a
measurement that does not support it, the “No Result; Meas invalid with I/Q inputs” error condition
message appears. This is error 135
Initial S/W Revision Prior to A.02.00
Baseband I/Q (Option BBA)
The Baseband I/Q functionality is a hardware option. It is option BBA. If the option is not installed, none of
the I/Q functionality is enabled.
The Baseband I/Q has four input ports and one output port. The input ports are I, I-bar, Q, and Q-bar. The I
and I-bar together compose the I channel and the Q and Q-bar together compose the Q channel. Each
channel has two modes of operation, Single-Ended (also called "unbalanced") and Differential Input (also
called "balanced"). When in Single-Ended operation, only the main port (I or Q) is used and the
complementary port (I-bar or Q-bar) is ignored. When in Differential Input mode, both main and
complementary ports are used.
The input settings (range, attenuation, skew, impedance, external gain) apply to the channels, not the
individual ports.
The system supports a variety of 1 MΩ input passive probes as well as the Agilent 113x Series active
differential probes using the Infinimax probe interface.
EMI Receiver Mode Reference 157
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