National Instruments NI PXIe-5601, Calibration Procedure, Page: 17 / 45

NI PXIe-5601 Calibration Procedure | © National Instruments | 17
Average Noise Level Verification
1. Connect a 50 Ω terminator to the NI 5601 RF IN connector. Ensure that the 50 Ω terminator
is connected to the NI 5601 LO OUT connector.
2. Connect the NI 5601 IF OUT connector to the spectrum analyzer input through the
3.5 mm-to-3.5 mm cable. Figure 5 shows the completed equipment setup.
Figure 5.
Average Noise Level Equipment Setup
Note
The figure shows the NI PXI-5652, but you can also use the NI PXIe-5652.
3. Create a new session for the NI 5601 using the niRFSA Initialize With Options VI or the
niRFSA_initWithOptions
function. Set the Driver Setup portion of the option string
parameter to
DriverSetup=Digitizer:<external>
.
4. Lock the NI PXI/PXIe-5652 to the Reference Clock used by the external test equipment.
Use the niRFSA Configure Ref Clock VI or the
niRFSA_ConfigureRefClock
function.
1 LO Source
2 50
Ω
Terminator
3 Spectrum Analyzer
4 Spectrum Analyzer Input
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
7
2
2
1
4
3