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NI PXI-5404 Calibration Procedure
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© National Instruments
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GAIN DAC
Calibrating the GAIN DAC calibrates the amplitude accuracy and the amplitude passband
flatness of the SINE out. Because the characteristics of the output channel vary over the
frequency range of the module, the GAIN DAC must be calibrated over several frequencies.
SYNC DAC
The SYNC DAC adjusts the CLOCK out duty cycle. Calibrating the SYNC DAC, therefore,
calibrates the duty cycle accuracy of the CLOCK out. Because the characteristics of the output
channel vary over the frequency range of the module, the SYNC DAC must be calibrated over
several frequencies.
Setting Up and Configuring the NI 5404
To set up and configure the NI 5404 module for adjustment, complete the following steps:
1.
Install the NI 5404 module in the PXI chassis.
2.
Configure the NI 5404 module with Measurement & Automation Explorer (MAX).
3.
Referring to Table 4 and Figure 1 as guides, make the appropriate connections to measure
the output for the constant you want to adjust.
Table 4.
Measuring Calibration Output
Applicable
Adjustment
Type of Measurement
Output
Connection
Measurement
Device
SINE out amplitude
accuracy and
passband flatness
accuracy
Magnitude of a sinusoidal
voltage (either amplitude,
peak-to-peak amplitude,
or rms value)
SINE out
DMM and power
meter
CLOCK out duty
cycle accuracy
Duty cycle
CLOCK out
Oscilloscope
Frequency accuracy
Frequency
SINE out
Spectrum analyzer