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NI PXI-5650/5651/5652 Calibration Procedure
Note
You must use the same attenuator used in this characterization when
performing the corresponding verification and adjustment procedures.
Verification
This section describes the steps you must follow to verify the published specifications for the
PXI-5650/5651/5652.
Verification includes the following functional test:
•
ALC limts table validation
Verification tests the following PXI-5650/5651/5652 specifications:
•
Frequency accuracy
•
High power level accuracy
•
Low power level accuracy
•
Single sideband phase noise at 10 kHz offset
•
Harmonics at an RF output level from -50 dBm to 0 dBm
•
Subharmonics at an RF output level from -50 dBm to 0 dBm
•
Nonharmonics at less than or equal to an RF output level of 0 dBm (>3 kHz and >100 kHz
offsets)
Verification of the PXI-5650/5651/5652 is complete only after you have successfully completed
all tests in this section.
Validating the ALC Limits Table
Complete the following steps to validate the ALC limits table on the device EEPROM:
1.
Call the niRFSG Initialize External Calibration VI.
2.
Call the niRFSG 5652 Validate ALC Limits Table VI.
Note
Any invalid ALC limits are reported in the
invalid limits
indicator. If this
array is non-empty, adjust the device. If invalid limits persist after adjustment, the
device specifications are not warranted over temperature at the specified
invalid
limits
frequencies, and the device requires repair.
Note
If the
ALC poly range data present?
parameter is FALSE, adjust the device.
The ALC limits table is validated using calibration data on the device and does not
require any exernal measurements. ALC poly range data was added to the device
EEPROM in NI-RFSG 15.0.3. This data is required to validate the ALC limits table.
If the device was last adjusted using a version of NI-RFSG prior to NI-RFSG 15.0.3,
the ALC limits table cannot be validated. The PXI-5652 may be used as an LO for
the NI PXIe-5663 or NI PXIe-5673 in this case. When using the PXI-5650/5651/
5652 as a stand-alone device, NI recommends adjusting the device using
NI-RFSG 15.0.3 or later.
3.
Call the niRFSG Close External Calibration VI to close the session. Set the
write
calibration to hardware?
parameter to FALSE.
