National Instruments PXIe-5423, Calibration Procedure

1.

Connect one end of the SMA (m)-to-SMA (m) cable to a channel of the PXIe-5423 and
the other end to a channel of the oscilloscope.

Note

Timebase accuracy verification can be performed on either channel of

the two-channel PXIe-5423.

2.

Lock the oscilloscope to the precision frequency reference using the PXI Clock.

3.

Configure the oscilloscope to acquire a 10 MHz sine wave with the following settings:
•

Vertical range

: 5 V

pk-pk

•

Sample rate

: 250 MS/s

•

Input impedance

: 50 Ω

•

Minimum number of points

: 1,048,576 samples

4.

Configure the PXIe-5423 with the following settings:
•

Channel

: Channel of the PXIe-5423 connected to the oscilloscope

•

Output impedance

: 50 Ω

•

Output mode

: Standard Function

•

Waveform type

: Sine

•

Frequency

: 10 MHz

•

Amplitude

: 2.5 V

pk-pk

•

Offset

: 0 V

•

Reference Clock source

: Onboard Reference Clock

5.

Wait 1 second for settling.

6.

Measure the peak frequency (Hz) using the oscilloscope and the Extract Single Tone
Information VI and record this as 

F

Measured

.

7.

Calculate the timebase error using the following formula:

Timebase Error

 (ppm) = 

FMeasured − 107

10

8.

Compare the frequency error to the appropriate limit from the 

Timebase Accuracy

Verification

 table.

Note

Timebase accuracy verification is only required on one channel of the

two-channel PXIe-5423.

Verifying DC Voltage Accuracy

Follow this procedure to verify the DC voltage accuracy of the PXIe-5423 by comparing the
voltage sourced by the PXIe-5423 to the value measured by the DMM.

Refer to the following table as you complete the following steps.

PXIe-5423 Calibration Procedure

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