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SCPI Commands for the Digital to Analog Converter
VX4101A MultiPaq Instrument User Manual
3–185
The TRACe: subsystem queries have the following responses:
TRACE | DATA [:DATA]? <Channel Select>,<Numeric List of Indices>
TRACE | DATA [:DATA]? <Channel Select>
There are two forms for this query as shown above. In either case, the return data
can be either ASCII decimal or binary data as defined by the FORMAT
subsystem command. If either query is issued during operation, the device
performs an applied abort and returns the query data.
The first query returns the array element values for the selected DAC channel.
The Numeric List of Indices specifies which sample points to return for the
selected DAC channel.
The second query above returns all of the values for the selected DAC channel.
TRACe:INDice?
Returns the current waveform segment index and sample index of the output
memory buffer.
NOTE. The query response time might make this command impractical at high
sample rates. For slow sample rates, you can use this query to determine the
approximate position of the actual waveform.
After completing the output of a waveform sequence, this query will return the
final segment and final sample since the DAC will continue to hold that output
until reset or initiated again.
RPERiod or RFREquency can be used to create gaps between waveform
segments. During the gap, segment and sample numbers do not change.
TRACe:POINts?
This query returns the current number of active sample points in the DAC trace
buffers.
TRACe:RFRequency?
Returns the frequency of the output cycle, in Hz.
TRACe:RPERiod?
Returns the period of the output cycle, in seconds.
Query Response