•
Plug the chassis and the calibration instrument(s) into the same power strip to avoid
ground loops.
•
Use an appropriate torque wrench to tighten all module RF connectors (SMA, 3.5 mm, or
K). NI recommends a 0.565 N · m (5 lb · in.) wrench for SMA connectors and a
0.90 N · m (8 lb · in.) wrench for 3.5 mm or K connectors.
•
Connect the frequency reference source to the signal source analyzer REF IN back panel
connector using a BNC(m)-to-BNC(m) cable, and connect the signal source analyzer
REF OUT connector to the PXIe-5654 REF IN connector using a BNC(m)-to-SMA(m)
cable.
•
Ensure that the PXI chassis fan speed is set to HIGH, that the fan filters, if present, are
clean, and that the empty slots contain filler panels. For more information about cooling,
refer to the
Maintain Forced-Air Cooling Note to Users
•
Frequencies less than and equal to 10 GHz apply to the 10 GHz and 20 GHz PXIe-5654;
frequencies above 10 GHz apply only to the 20 GHz PXIe-5654.
Initial Setup
Refer to the
PXIe-5654 Getting Started Guide
for information about how to install the
software and the hardware and how to configure the device in Measurement & Automation
Explorer (MAX).
Test System Characterization
The following procedure characterizes the test equipment used during verification.
Zeroing and Calibrating the Power Sensor
1.
Connect channel A of the power meter to the power sensor.
2.
Zero and calibrate the power sensor using the built-in functions in the power meter.
As-Found and As-Left Limits
The as-found limits are the published specifications for the PXIe-5654. NI uses these limits to
determine whether the PXIe-5654 meets the specifications when it is received for calibration.
Use the as-found limits during initial verification.
The as-left calibration limits are equal to the published NI specifications for the PXIe-5654,
less guard bands for measurement uncertainty, temperature drift, and drift over time. NI uses
these limits to reduce the probability that the instrument will be outside the published
specification limits at the end of the calibration cycle. Use the as-left limits when performing
verification after adjustment.
PXIe-5654 Calibration Procedure
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© National Instruments
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