PXIe-5665 Calibration Procedure
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© National Instruments
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55
5.
Disable the RF source 1 and RF source 2 outputs.
Note
When disabled, the RF source 1 and RF source 2 output signals should be less
than -60 dBm.
6.
Set the RF source 1 power to the
RF Source 1 Programmed Power
1
corresponding to one
of the following values:
•
Preamplifier disabled: -10 dBm
•
Preamplifier enabled: -30 dBm
7.
Set the RF source 2 power to the
RF Source 2 Programmed Power
2
corresponding to one
of the following values:
•
Preamplifier disabled: -10 dBm
•
Preamplifier enabled: -30 dBm
8.
Configure the PXIe-5665 reference level to one of the following values:
•
Preamplifier disabled: -10 dBm
•
Preamplifier enabled: -30 dBm
9.
For each test frequency from Table 29, calculate the following four frequencies:
•
IMD Low Frequency
=
Test Frequency
- 1.05 MHz
•
P1 Frequency
=
Test Frequency
+ 350 kHz
•
P2 Frequency
=
Test Frequency
- 350 kHz
•
IMD High Frequency
=
Test Frequency
+ 1.05 MHz
where
IMD
is the intermodulation distortion.
10. Set the RF source 1 frequency to
P1 Frequency
.
11. Set the RF source 2 frequency to
P2 Frequency
.
12. Set the PXIe-5665 center frequency to
IMD Low Frequency
.
13. Commit the PXIe-5665 settings to hardware.
14. Enable the RF source 1 and the RF source 2 outputs.
1
The
RF Source 1 Programmed Power
value was measured in the
RF Source Power (Combined) for
equipment characterization procedure.
2
The
RF Source 2 Programmed Power
value was measured in the
RF Source Power (Combined) for
equipment characterization procedure.
Table 29.
TOI (Frequencies
≤
700 MHz) Verification Test Frequencies
Start Frequency
Stop Frequency (MHz)
Step Size (MHz)
12.05 MHz
92.05
40
100 MHz
700
300