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NI PXIe-6674T Calibration Procedure
Calibration Interval
The measurement requirements of the application determine how often you should calibrate the
device to ensure its accuracy. National Instruments recommends that you calibrate the
NI PXIe-6674T
yearly
. You may want to shorten this interval based on the application demands.
Password
The default password for password-protected operations is
NI
.
Test Equipment
Calibrating the NI PXIe-6674T requires the following equipment.
Test Conditions
•
Install the NI PXIe-6674T in the system timing slot of the PXI Express chassis. The
calibration procedure requires features of PXI Express that are accessible only in the system
timing slot.
•
Maintain a temperature of approximately 23 °C ± 5 °C.
•
Keep relative humidity below 80 percent.
•
Use shielded copper wire for all cable connections to the device.
•
Ensure the NI PXIe-6674T has been continuously powered for at least 24 hours prior to
calibration to allow the 10 MHz oscillator frequency to stabilize.
•
Keep PXI Express chassis filters clean and fan speed set to High.
•
Ensure the frequency reference has been continuously powered, as specified by its manual,
for its accuracy to be within 0.75 parts-per-billion (ppb) prior to calibration.
Calibration Procedure
The steps used in the calibration procedure are as follows:
1. Initial setup.
2. Verification.
Equipment
Recommended Model
Requirements
10 MHz clock source
Symmetricom/Datum 8040
Accurate to within
0.75 parts-per-billion (ppb)
BNC-SMA cable
—
—
PXI Express chassis
NI PXIe-1062Q, NI PXIe-1075,
NI PXIe-1082, NI PXIe-1085,
NI PXIe-1086
Must have a system timing slot
