NI PXIe-5170R, Calibration Procedure

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17. Connect splitter output 2 of the power sensor assembly to channel 4 of the NI 5170R and
repeat steps 2 through 12 for each configuration listed in the Flatness and Bandwidth
Verification table.
18. Connect splitter output 2 of the power sensor assembly to channel 5 of the NI 5170R and
repeat steps 2 through 12 for each configuration listed in the Flatness and Bandwidth
Verification table.
19. Connect splitter output 2 of the power sensor assembly to channel 6 of the NI 5170R and
repeat steps 2 through 12 for each configuration listed in the Flatness and Bandwidth
Verification table.
20. Connect splitter output 2 of the power sensor assembly to channel 7 of the NI 5170R and
repeat steps 2 through 12 for each configuration listed in the Flatness and Bandwidth
Verification table.
Related Information
Characterizing Power Splitter Amplitude Imbalance on page 7
This procedure characterizes the amplitude imbalance of the two output ports of the power
splitter over a range of frequencies.
Adjustment
This section describes the steps needed to adjust the NI 5170R to meet published
specifications.
Adjusting DC
Follow this procedure to adjust the DC gain and offset of the NI 5170R.
1.
Call the niHSAI Open Ext Cal Session VI to obtain an external calibration session.
2. Connect the SMA (m)-to-BNC (f) adapter to channel 0 of the NI 5170R.
3. Connect the calibrator test head to the SMA (m)-to-BNC (f) adapter.
4. Configure the calibrator output impedance to 50 Ω.
5. Configure the calibrator to a known state by outputting 10 mV of DC voltage.
6. Enable the calibrator output.
7. Call the niHSAI DC Cal Initialize VI with the following settings:
•
Channel : 0
8. Call the niHSAI DC Cal Configure VI to obtain the DC voltage to generate and configure
the calibrator to output the specified DC voltage.
9. Wait 1 second for settling.
10. Call the niHSAI DC Cal Adjust VI with the following settings:
• Actual Voltage Generated : The DC voltage present on channel 0 of the NI 5170R
11. Repeat steps 8 through 10 until the DC Cal Complete indicator from the niHSAI DC
Cal Adjust VI returns TRUE.
12. Connect the calibrator test head to the channel 1 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the channels
parameter from 0 to 1.
NI PXIe-5170R Calibration Procedure | © National Instruments | 21