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PXIe-5665 Calibration Procedure
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© National Instruments
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51
5.
Set the PXIe-5665 center frequency according to Table 26 or Table 27 as appropriate.
6.
Commit the PXIe-5665 settings to hardware.
7.
For each test frequency from Table 26 or Table 27, calculate PXIe-5665 image frequencies
using the following formulas:
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 MHz
•
IF2 Image at RF = Test Frequency
- 375 MHz
where
Test Frequency
is the PXIe-5665 center frequency.
8.
For each image and test frequency in the list from step 7 and the PXIe-5665 center
frequency from step 5, set the RF source 2 to the frequency with a
Power Setting
of 0 dB.
The
RF Source Power Direct
for this frequency is used in step 11.
Note
RF Source Power Direct
value was measured in the
equipment characterization procedure.
Table 26.
PXIe-5665 3.6 GHz VSA Image Rejection Verification Test Frequencies
Start Frequency
Stop Frequency (GHz)
Step Size (MHz)
100.033325 MHz
2.000033325
400
2.399966675 GHz
3.599966675
400
Table 27.
PXIe-5665 14 GHz VSA Image Rejection Verification Test Frequencies
Start Frequency
Stop Frequency (GHz)
Step Size (MHz)
100.033325 MHz
2.000033325
400
2.399966675 GHz
13.999966675
400