D/A Converter Test
The detector provides analog output of chromatographic signals for use with integrators, chart recorders or data systems. The analog signal is converted from the digital format by the digital-analog-converter (DAC).
The D/A Converter Test is used to verify correct operation of the digital-analog-converter by applying a digital test signal to the DAC.
The DAC outputs an analog signal of approximately 50 mV (if the zero offset of the analog output is set to the default value of 5 %) which can be plotted on an integrator. A continuous square wave with an amplitude of 10 µV and a frequency of approximately 1 cycle/24 seconds is applied to the signal.
The amplitude of the square wave and the peak-to-peak noise are used to evaluate the DAC test.
When
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Prerequisites
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Running the Test with Agilent Lab Advisor
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Run the D/A Converter Test with the Agilent Lab Advisor (for further information see Online- Help of user interface).
Figure: Converter Test - Results 
Figure: D/A Converter (DAC) Test – Example of Integrator Plot
Running the Test with Instant Pilot
The test can be started via the command line.
To start the test
TEST: DAC 1Reply:
RA 00000 TEST:DAC 1To stop the test
TEST:DAC 0Reply:
RA 00000 TEST:DAC 0
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