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PXIe-5665 Calibration Procedure
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© National Instruments
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25. Disable the output of RF source 1 and RF source 2.
Note
When disabled, the RF source 1 and RF source 2 output signals should be less
than -60 dBm.
26. Close the PXIe-5665 session.
If the gain compression for frequencies >700 MHz
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 LO Output Power
Note
Prior to starting this procedure, zero and calibrate the power sensor according
Zeroing and Calibrating the Power Sensor
section of this document.
1.
Connect the RF source 2 output to the PXIe-5605 RF IN connector using the SMA (m)-to-
SMA (m) cable.
2.
Connect power sensor A to the PXIe-5605 LO3 OUT connector using the SMA (m)-to-
SMA (m) cable.
3.
Connect the spectrum analyzer to the PXIe-5605 LO2 OUT connector.
Table 52.
Gain Compression Verification Test Limits (>700 MHz, Preamplifier Enabled)
Frequency
Limit
Compression
(dB)
Applied Power
(dBm)
>700 MHz to
1.70 GHz
As-Found
1
-15
As-Left
*
1
-13
>1.70 GHz to
3.6 GHz
As-Found
1
-18
As-Left
*
1
-16
*
Refer to the
section of this document for more information
about as-left limits.
The device specification calls less than or equal to 1 dB gain compression for a minimum
applied power. The applied power includes the measurement uncertainty to guarantee the
required minimum applied power.