1.
Connect one end of the SMA (m)-to-BNC (m) cable to CH 0 of the PXIe-5423. Connect
the other end to the double banana plug-to-BNC (f) adapter, and connect the double
banana plug-to-BNC (f) adapter to the HI and LO connectors of the DMM.
2.
Configure the DMM with the following settings:
•
Function
: DC Voltage
•
Resolution
: 7.5 digits
•
Aperture time
: 100 ms
•
Number of averages
: 4
•
Auto zero
: Enabled
•
ADC calibration
: Enabled
•
Vertical range
:
DMM range
listed in the
DC Voltage Accuracy Verification
3.
Configure the PXIe-5423 with the following settings:
•
Channel
: Channel of the PXIe-5423 connected to the DMM
•
Load impedance
: 1 MΩ
•
Output mode
: Standard Function
•
Waveform type
: User
•
Amplitude
:
Amplitude range
listed in the
DC Voltage Accuracy Verification
table
•
Offset
:
Offset
DC Voltage Accuracy Verification
•
Waveform data
: Array of zeros
•
Waveform size
: 8,192 samples
4.
Wait 1 second for settling.
5.
Measure the DC voltage (V) using the DMM and record this as
DC Voltage
Measured
.
6.
Calculate the DC voltage error using the following formula:
DC Voltage Error
(mV) = (
DC Voltage
Measured
-
Expected Amplitude
) * 10
3
where
Expected Amplitude
is the expected amplitude (V) listed in the
table.
7.
Compare the DC voltage error to the appropriate limit from the
8.
Repeat steps 2 through 7 for each configuration listed in the
9.
If you are verifying a two-channel PXIe-5423, complete the following steps to verify
CH 1:
a)
Abort waveform generation on the PXIe-5423.
b)
Disconnect the SMA (m)-to-BNC (m) cable from CH 0 and connect it to CH 1 of the
PXIe-5423.
c)
Repeat steps 2 through 8.
Verifying AC Amplitude Accuracy
Follow this procedure to verify the AC amplitude accuracy of the PXIe-5423 by comparing the
amplitude sourced by the PXIe-5423 to the amplitude measured by the DMM.
Refer to the following table as you complete the following steps.
PXIe-5423 Calibration Procedure
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© National Instruments Corporation
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