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PXIe-5665 Calibration Procedure
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© National Instruments
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15. Calculate the
Absolute Amplitude Accuracy
at each RF frequency using the following
formula:
Absolute Amplitude Accuracy = PXIe-5665 Power - Corrected Input Power
16. Repeat steps 8 to 15 for all remaining frequencies in Table 10.
17. Calculate the
Frequency Response
at each RF frequency using the following formula:
Frequency Response = Absolute Amplitude Accuracy -
Absolute Amplitude Accuracy at 612.5 MHz
Note
Calculate
Frequency Response
only for PXIe-5665 center frequencies less
than or equal to 3.6 GHz.
18. Repeat steps 9 to 17 for all reference levels listed in step 7.
19. Repeat steps 8 to 18 for an instantaneous bandwidth of 50 MHz (25 MHz for the
PXIe-5665 with 25 MHz bandwidth).
20. Repeat steps 8 to 19 with the PXIe-5665 preamplifier enabled.
21.
(PXIe-5665 14 GHz VSA)
Repeat steps 8 to 19 for test frequencies greater than 3.6 GHz
with the PXIe-5665 preselector enabled and preamplifier disabled.
Note
The PXIe-5665 preselector has a maximum instantaneous bandwidth of
47 MHz. For steps that call for a 50 MHz instantaneous bandwidth, use a 40 MHz
instantaneous bandwidth when using the preselector.