National Instruments PXIe-5164, Руководство пользователя

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3. Configure the PXIe-5164 with the following settings:
•
Input impedance: 50 Ω
• Maximum input frequency: 400 MHz
• Vertical offset: 0 V
• Vertical range: the Vertical Range value from the 50 Ω Passband Amplitude Flatness
and Bandwidth Verification table
• Sample rate: the Sample Rate value from the 50 Ω Passband Amplitude Flatness and
Bandwidth Verification table
• Minimum number of points: 1,048,576 samples
4. Configure the signal generator to generate a sine waveform with the following
characteristics into a 50 Ω load:
•
Frequency: the Test Point Frequency value from the 50 Ω Passband Amplitude
Flatness and Bandwidth Verification table
• Amplitude: the Test Point Amplitude value from the 50 Ω Passband Amplitude
Flatness and Bandwidth Verification table plus splitter loss
Note Select the splitter loss value from the list of test points from the
Test System Characterization section for the current Test Point Frequency.
5. Configure the power sensor to correct for the Test Point Frequency using the power
sensor frequency correction function.
6. Wait 0.1 second for settling.
7. Use the power sensor to measure the power in dBm. Record the result as measured input
power .
8. Calculate the corrected input power using the following equation:
corrected input power = measured input power + splitter balance
Note
Select the splitter balance value from the list of test points from the Test
System Characterization section for the current Test Point Frequency.
9. Use the PXIe-5164 to acquire and measure the power using the Extract Single Tone
Information VI, converting the result from Vpk to dBm. Record the result as
device input
power .
10. If the Test Point Frequency value from the 50 Ω Passband Amplitude Flatness and
Bandwidth Verification table is 50 kHz, proceed to the following step. Otherwise, go to
step 13.
11. Calculate the power reference using the following equation:
power reference = device input power - corrected input power
12. Go to step 14. The power error is not calculated for this configuration.
13. Calculate the
power error using the following equation:
power error = device input power - corrected input power - power reference
14. Compare the power error to the appropriate Limit from the 50 Ω Passband Amplitude
Flatness and Bandwidth Verification table.
15. Repeat steps 2 through 14 for each configuration in the 50 Ω Passband Amplitude
Flatness and Bandwidth Verification table.
PXIe-5164 Calibration Procedure | © National Instruments | 29