HP E1340A User's Manual
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[SOURce:]ARBitrary
The [SOURce:]ARBitrary subsystem controls:
• The DAC data source.
• Direct downloading of DAC data to the waveform segment memory.
Subsystem Syntax [SOURce:]
ARBitrary
:DAC
:SOURce <
source>
:DOWNload <
source>,<dest>,<length> [no query]
:COMPlete [no query]
:DAC:SOURce [SOURce:]ARBitrary:DAC:SOURce <source> selects the DAC’s data
source. The available sources are:
INTernal: The waveforms specified by the SOURce:FUNC or
SOURce:FUNC:USER commands.
VXI: The VXIbus data transfer bus.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
source discrete INTernal | VXI none
Comments • When driving the DAC from the VXIbus data transfer bus, the
address for writing the data is offset 12 decimal (0C hex) in the HP
E1340A’s A16 address space.
• Setting the DAC data source to a setting other than INTernal disables
the
ARM subsystem, the SOURce subsystem except for the
SOURce:ARBitrary and SOURce:VOLTage subsystems, and the
TRIGger subsystem. The HP E1340A immediately outputs each
DAC data point when received. The DAC data must be provided as
integer numbers between 0 and 4095; 0 generates negative full scale
output, 4095 generates positive full scale. The
SOURce:VOLTage:LEVel:IMMediate:AMPLitude specifies the
positive full-scale output voltage, and must be specified in terms of
volts or volts peak (
V or VPK).
• Executable when initiated: Query form only
• Coupled command: Yes
• Related commands: SOURce:VOLTage:LEVel:IMMediate:AMPLitude
• *RST Condition: SOURce:ARBitrary:DAC:SOURce INTernal
Example Setting the DAC data source
ARB:DAC:SOUR VXI Select VXI A16 address space as
data source
[SOURce:]ARBitrary:DAC:SOURce
Chapter 7 HP E1340A Command Reference 149