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PXIe-5665 Calibration Procedure
9.
Wait for 200 ms to allow the PXIe-5665 and RF source 2 amplitudes to settle.
Note
Settling times are a characteristic of the RF source device. Refer to the
section of this document for a list of NI-recommended source devices and
device specifications. If you use an RF source device with different device
specifications, your settling times may differ from those listed in this procedure.
10. Acquire the spectrum and determine the peak power for each frequency. The peak power
value is the
Measured Level
.
11. For each
Measured Level,
calculate the
Response Correction
using the following equation:
Response Correction
=
Measured Level
+
RF Source Power Direct
12. Calculate the
Image Rejection
at each of the image frequencies using the following
equation:
Image Rejection = Response Correction (at test frequency) - Response Correction (at each
image frequency)
13. Repeat steps 5 to 12 for all center frequencies in Table 26 or Table 27.
14. Compare the
Image Rejection
results to the verification test limits in Table 28.
15. Close the PXIe-5665 session.
If the image rejection verification procedure determines that the PXIe-5665 is outside its limits,
refer to
Worldwide Support and Services
for information about support resources or service
requests.
Table 28.
Image Rejection Verification Test Limits
Center Frequency
As-Found Limit
As-Left Limit
*
100 MHz to 2.2 GHz
-80 dBc
-83 dBc
>2.2 GHz to 3.6 GHz
-77 dBc
-80 dBc
>3.6 GHz to 14 GHz
†
-80 dBc
-82 dBc
*
section of this document for more information
about as-left limits.
†
Center frequencies >3.6 GHz apply only to the PXIe-5665 14 GHz VSA.