![background image](http://html2.mh-extra.com/html/national-instruments/pxie-5665/pxie-5665_calibration-manual_3612098067.webp)
PXIe-5665 Calibration Procedure
|
© National Instruments
|
67
26. Disable the output of RF source 2.
Note
When disabled, the RF source 2 output signal should be less than -60 dBm.
27. Close the PXIe-5665 session.
If the second harmonic intercept 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 Gain Compression
This procedure verifies that <1 dB of gain compression occurs when the specified power level
is applied at the RF IN connector of the PXIe-5665.
Note
The power level you apply differs whether you are verifying the as-found or
as-left limit.
Table 40.
SHI Verification Test Limits (Preamplifier Enabled)
Source
Frequency
Device
As-Found Limit
(dBm)
As-Left Limit
(dBm)
*
300 MHz to
1.8 GHz
PXIe-5665
3.6 GHz VSA
+15
+18
PXIe-5665
14 GHz VSA
+20
+25
*
Refer to the
section of this document for more information
about as-left limits.
Table 41.
SHI Verification Test Limits (PXIe-5665 14 GHz VSA Preselector Disabled)
Frequency (GHz)
As-Found Limit (dBm)
As-Left Limit (dBm)
*
>1.80 to 4.25
+28
+30
>4.25 to 7.00
+18
+20
*
Refer to the
section of this document for more information
about as-left limits.