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National Instruments Corporation
17
NI PXIe-5611 Calibration Procedure
If the results are within the selected test limit, the device has passed this
portion of the verification.
Verifying RF Path Gain
Complete the following steps to verify the RF path gain of the NI 5611
using a power meter, rubidium frequency standard, spectrum analyzer,
power splitter, and 6 dB attenuator.
Note
The attenuator is placed in front of the spectrum analyzer to improve the spectrum
analyzer return loss. The power splitter must be characterized so that you can account for
its loss. Refer to the
Characterizing the Power Splitter
section for more information about
how to characterize your power splitter.
Table 7.
Modulation Bandwidth Impairment Verification Test Limits for
Offset Frequencies Between –10 MHz and +10 MHz
LO Frequency (GHz)
Test Limits ISR (dBc)
0.2
–41
2.4
–48
4.0
–45
5.8
–41