Digital Bus - Keysight x-series User Reference Manual

4 Input/Output Functions
Input/Output
Readback Text
Initial S/W Revision
Modified at S/W Revision

Digital Bus

This menu allows you to configure the LVDS connector located on the rear panel of the instrument. It is a
unidirectional link of real time data at a 90 MSa/s rate. The ADC is sampling a 22.5 MHz IF.
The data that appears on this port is raw, uncorrected ADC samples, unless you have option RTL. With
option RTL, you get fully corrected I/Q data.
This connector will only be active when the Narrowband IF Path is currently in use.
Key Path
Initial S/W Revision
Bus Out On/Off
When Bus Out is on, all acquisitions are streamed to the output port including acquisitions for internal
purposes such as Alignment. The internal processing and routing of acquisitions continues as usual and is
unaffected by the state of Bus Out.
When Bus Out is off, no signal appears on the LVDS port.
Key Path
Scope
Remote Command
Example
Preset
State Saved
Initial S/W Revision
Modified at S/W Revision
I/Q Cal Out
The Baseband I/Q "Cal Out" port can be turned on with either a 1 kHz or a 250 kHz square wave. This can
be turned on independent of the input selection. A Preset will reset this to Off.
206
• CISPR detectors (QPD, EMI Avg, RMS Avg) are unavailable
Demod Audio
Prior to A.02.00 (this was the default functionality, and there was no selection)
A.04.00
Input/Output, Output Config
A.04.00
Input/Output, Output Config, Digital Bus
Mode Global
:OUTPut:DBUS[1][:STATe] ON|OFF|1|0
:OUTPut:DBUS[1][:STATe]?
OUTP:DBUS ON
This is unaffected by a Preset but is set to Off on a "Restore Input/Output Defaults" or "Restore
System Defaults -> All"
Saved in Input/Output State
Prior to A.02.00
A.04.00
EMI Receiver Mode Reference