HP E1340A User's Manual
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[:SEGMent]:VOLTage
:DAC
[SOURce:]LIST[:SEGMent]:VOLTage:DAC <voltage_list> defines the
series of output voltage points that constitute a waveform segment. The
points are specified in terms of digital-to-analog converter (DAC) codes.
Parameters The voltage_list may be either a comma-separated list of DAC codes or an
IEEE-488.2 definite length block containing the DAC codes in 16-bit
integer format. The upper four bits of the 16-bit integer must be 0.
The DAC code is a 12-bit number, with 0 representing negative full scale,
4095 representing positive full scale, and 2048 representing zero. With
SOURce:VOLTage:LEVel:IMMediate:AMPLitude 5.11750 V, and
OUTPut:LOAD 50, the least significant bit (LSB) represents 2.50 mV.
MINimum and MAXimum cannot be used with this command.
Comments • If block format is used, the most significant byte of each value must
be sent first.
• Waveform segment contents are unspecified at power-on and must
be loaded before the segment may be output.
• Executable when initiated: No
• Coupled command: No
• Related Commands: SOURce:LIST:SEGMent:VOLTage,
SOURce:VOLTage:LEVel:IMMediate:AMPLitude
• *RST Condition: unaffected
• Power-On Condition: waveform segment contents are unspecified
Example Defining a waveform segment voltage point list
LIST:SEL B Select waveform segment B
LIST:VOLT:DAC 4,1048,4095,.....,2048 Define 4096 waveform voltages
[:SEGMent]:VOLTage
:POINts?
[SOURce:]LIST[:SEGMent]:VOLTage:POINts? returns a number
indicating the length of the currently selected waveform segment’s voltage
point list. The length is considered 0 at power-on. For segment D, it is set
to 0 when a waveform shape other than DC or USER is selected. The
length is set to 4096 after the segment contents have been loaded via the
SOURce:ARBitrary:DOWNload, SOURce:LIST:SEGMent:VOLTage, or
SOURce:LIST:SEGMent:VOLTage:DAC commands.
Comments • Executable when initiated: Yes
• Coupled command: No
• *RST Condition: unaffected
• Power-On Condition: waveform segment lengths are 0
Example Query voltage point list length
LIST:SEL C Select waveform segment C
LIST:VOLT:POIN? Query voltage point list length
[SOURce:]LIST[:SEGMent]:VOLTage:DAC
164 HP E1340A Command Reference Chapter 7