User`s manual

:DAC:SOURce
[SOURce:]ARBitrary:DAC:SOURce <source> selects the DAC’s data source.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
<
source> discrete DPORt | INTernal | LBUS | VXI none
Comments • The available sources are:
– DPORt: The Agilent E1445A’s front panel “Digital Port In” connector.
– LBUS: The VXIbus local bus.
– INTernal: The [SOURce:]LIST[1] subsystem or built-in waveforms.
– VXI: The VXIbus data transfer bus.
• When driving the DAC from the VXIbus data transfer bus, the address for writing
the data is offset 38 decimal (26 hex) in the Agilent E1445A’s A24 address space.
• Setting the DAC data source to a setting other than INTernal disables the ARM
subsystem, the INITiate command, the [SOURce:] subsystem except for the
[SOURce:]ARBitrary, [SOURce:]MARKer, and [SOURce:]VOLTage subsystems,
and the
TRIGger subsystem. The Agilent E1445A immediately outputs each
DAC data point when received. Also, the output amplitude must be specified in
terms of volts or volts peak (V or VPK).
• Use the [SOURce:]ARBitrary:DAC:FORMat command to select the format of the
data (two’s-complement or unsigned) when directly driving the DAC from the
VXIbus local bus, the front panel “Digital Port” , or the VXI backplane, or when
programming waveforms using DAC codes via the
[SOURce:]ARBitrary:DOWNload, [SOURce:]LIST[1][:SEGMent]:COMBined, or
[SOURce:]LIST[1][:SEGMent]:VOLTage:DAC commands.
• Executable when Initiated: Query form only
• Coupling Group: Frequency and voltage
• Related Commands: VINStrument[:CONFigure]:LBUS[:MODE]
•
*RST Condition: SOURce:ARBitrary:DAC:SOURce INTernal
Example Setting the DAC Data Source
ARB:DAC:SOUR DPOR Selects front panel “Digital Port”
connector as source.
[SOURce:]ARBitrary
Chapter 8 Command Reference 315