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NI PXIe-5624R Calibration Procedure
11. Connect the 50
Ω
terminator to splitter output 2 using the 3.5 mm (f)-to-3.5 mm (f) adapter.
The following figure illustrates the hardware setup.
Figure 2.
Connection Diagram for Measuring at Splitter Output 1
12. Configure the signal generator using the following settings:
•
Frequency: 5 MHz
•
Power level: 4 dBm
13. Configure the power sensor to correct for frequency using the power sensor frequency
correction function.
14. Use the power sensor to measure the power.
15. Repeat steps 12 through 14 by updating the signal generator frequency from 5 MHz to
2.005 GHz in 5 MHz steps.
Record the resulting measurements as
splitter output 1 power
. Each frequency should have
a corresponding value.
16. Calculate the splitter balance for each frequency point using the following equation:
splitter balance = splitter output 2 power - splitter output 1 power
17. Disconnect the 50
Ω
terminator and 3.5 mm (f)-to-3.5 mm (f) adapter from splitter
output 2. The resulting fixture is used in
Verifying Absolute Amplitude Accuracy
Adjusting Absolute Amplitude Accuracy
1
Signal Generator
2
SMA (m)-to-SMA (m) Cable
3
50
Ω
Terminator
4
3.5 mm (f)-to-3.5 mm (f) Adapter
5
6 dB Attenuator
6
3.5 mm (m)-to-3.5 mm (m) Adapter
7
Power Splitter
8
SMA (f)-to-N (m) Adapter
9
Power Sensor
1
7
8
9
3
4
5
6
2
