NI PXIe-5601 Calibration Procedure
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© National Instruments
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41
Reference Level Adjustment for RF Frequencies
≤
120 MHz
1.
Connect the RF source to the power splitter input through the 3.5 mm-to-3.5 mm cable.
2.
Connect the power splitter reference output to power sensor A.
3.
Connect the other power splitter output to the NI 5601 RF IN connector through the
3.5 mm-to-3.5 mm adapter.
4.
Ensure that the 50
Ω
terminator is connected to the NI 5601 LO OUT connector.
5.
Connect the NI 5601 IF OUT connector to the spectrum analyzer input. Figure 10 shows
the completed equipment setup.
6.
Create a new calibration session for the NI 5601 using the niRFSA Init Ext Cal VI or the
niRFSA_InitExtCal
function. Set the
driverSetup
string of the
option string
parameter to
calAction: append
.
Note
Each step opens a new calibration session. Enter the appropriate password for
this VI. The default password for password-protected operations is
NI
.
Initialize the Reference Level Calibration step using the niRFSA Initialize Calibration Step VI
or the
niRFSA_InitializeCalibrationStep
function. Set the
calibration step
parameter in the VI to
Ref Level Calibration
, or set the
calibrationStep
parameter in the
function to
NIRFSA_VAL_EXT_CAL_REF_LEVEL_CALIBRATION
.
7.
Initialize the NI PXI/PXIe-5652 using the niRFSG Initialize VI or the
niRFSG_init
function.
8.
Lock the NI PXI/PXIe-5652 to the Reference Clock used by the external test equipment.
Use the niRFSG Configure Ref Clock VI or the
niRFSG_ConfigureRefClock
function.
9.
Set the NI PXI/PXIe-5652 power level to 0 dBm using the niRFSG Power Level property
or the
NIRFSG_ATTR_POWER_LEVEL
attribute.
10. Set the NI PXI/PXIe-5652 frequency to 187.5 MHz using the niRFSG Frequency property
or the
NIRFSG_ATTR_FREQUENCY
attribute.
11. Commit the settings to hardware using the niRFSG Initiate VI or the
niRFSG_Initiate
function.
12. Call the niRFSA Initiate VI or the
niRFSA_Initiate
function.
13. Configure the NI 5601 RF signal path by setting the niRFSA RF Path Selection property to
RF band 4 or by setting the
NIRFSA_ATTR_CAL_RF_PATH_SELECTION attribute
to
NIRFSA_VAL_EXT_CAL_RF_BAND_4
.
