48
|
ni.com
|
PXIe-5665 Calibration Procedure
21. Repeat steps 11 to 19 for all spans in Table 24.
22. Repeat steps 9 to 20 for all center frequencies in Table 22.
23.
(PXIe-5665 14 GHz VSA)
Repeat steps 9 to 20 for center frequencies from 3.8 GHz to
14 GHz in 200 MHz steps with the PXIe-5665 preselector enabled.
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.
24. Close the PXIe-5665 session.
If the LO-related spurs (sideband spurs) 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.
Verifying Image Rejection
This procedure verifies the following image responses of the PXIe-5665:
For test frequencies <3.6 GHz:
•
IF1 Image
=
Test Frequency
+ 9.225 GHz
•
IF2 Image
= 3.3875 GHz
•
IF3 Image
= 987.5 MHz
•
IF2 Image at RF
=
Test Frequency
+ 1.225 GHz
•
IF3 Image at RF
= |
Test Frequency
- 375 MHz | (Evaluated only for images greater than
10 MHz)
For test frequencies >3.6 GHz,
•
IF1 Image
=
Test Frequency
+ 1.225 GHz
•
IF2 Image
= 987.5 GHz
•
IF2 Image at RF
=
Test Frequency
-
375 MHz
where
Test Frequency
is the PXIe-5665 center frequency.