NI PXIe-5601 Calibration Procedure
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© National Instruments
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29
This procedure determines amplitude corrections for the RF attenuation and gain states. Those
corrections are stored in the NI 5601.
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 power meter input.
Figure 9 shows the completed equipment setup.
Figure 9.
IF Attenuation Adjustment Equipment Connections
Note
The figure shows the NI PXI-5652, but you can also use the NI PXIe-5652.
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: create
.
Note
Each step opens a new calibration session. Enter the appropriate password for
this VI. The default password for password-protected operations is
NI
.
1
RF Source
2
Power Splitter
3
Power Sensor A
4
LO Source
5
Power Meter
6
Power Meter Channel A
7
Power Meter Channel B
8
Power Sensor B
9
Right Angle Adapter
10 50
Ω
Terminator
0 dBm NOM
RF IN
IF OUT
LO IN
LO OUT
10 MHz – 6.6 GHz
ACCESS
ACTIVE
ALL PORTS
±5 VDC MAX
50
Ω
0 dBm NOM
+20 dBm MAX
+20 dBm MAX
+20 dBm MAX
[+30 dBm MAX
w/Attenuation]
RF Downconverter
NI PXIe-5601
4
5
1
10
8
9
2
6
7
3
