NI PXIe-5694 Calibration Procedure
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© National Instruments
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9
Characterization
Complete each of the following procedures to characterize the test system. The information
obtained in characterization is used when verifying the system behavior.
Caution
The connectors on the device under test (DUT) and test equipment are
fragile. Perform the steps in these procedures with great care to prevent damaging any
DUTs or test equipment.
Determining Power Splitter Reference Output
You must designate one of the two power splitter outputs as the reference output. Use only this
output as the reference output for all procedures.
Calibrating Power Sensor Zero Settings
Complete this procedure before beginning any characterization process to ensure that the power
sensor returns appropriate readings.
1.
Connect channel A of the power meter to power sensor A.
2.
Connect channel B of the power meter to power sensor B.
3.
Zero and calibrate the power sensor using the built-in functions in the power meter.
Characterizing RF Source Power
Complete this procedure to characterize the output power of the RF sources through the cables,
attenuators, and combiner. The procedures listed in
Verifying Third-Order Intercept Point
require that the power levels of the sources be in accord with the specification
definition.
Synchronizing the Signal Generators
Complete this procedure to synchronize RF source 1, RF source 2, and the spectrum analyzer to
the same 10 MHz clock reference.
1.
Connect the 10 MHz clock reference output on RF source 1 back panel to the 10 MHz clock
reference input on the RF source 2 back panel. Use a BNC (m)-to-BNC (m) cable.
2.
Connect the 10 MHz clock reference output on the RF source 2 back panel to the 10 MHz
clock reference input on the spectrum analyzer back panel. Use a BNC (m)-to-BNC (m)
cable.
3.
Configure the spectrum analyzer to use the external reference. On the Rohde & Schwarz
FSU26 analyzer, press the
Setup
button and select
External Reference
.
