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CALIBRATION PROCEDURE
PXIe-5185/5186
This document contains information for calibrating National Instruments PXIe-5185/5186
digitizers. The PXIe-5185/5186 digitizers were developed jointly between Tektronix and
National Instruments. The devices use Tektronix, Enabling Technology
bandwidth and high-speed sampling on the National Instruments Synchronization and Memory
Core (SMC) technology with TClk synchronization.
For more information on calibration, visit
Contents
50 Ω and 1 MΩ Devices ........................................................................................................... 2
Software Requirements............................................................................................................. 2
Related Documentation ............................................................................................................ 2
Password .................................................................................................................................. 3
Calibration Interval................................................................................................................... 3
Test Equipment......................................................................................................................... 3
Test Conditions......................................................................................................................... 5
Calibration Procedures ............................................................................................................. 6
Initial Setup....................................................................................................................... 6
Self-Calibration ................................................................................................................ 6
MAX ......................................................................................................................... 7
NI-SCOPE Soft Front Panel ..................................................................................... 7
NI-SCOPE ................................................................................................................ 7
External Calibration.......................................................................................................... 7
Test System Characterization ........................................................................................... 7
Zeroing the Power Sensor......................................................................................... 8
Characterizing Power Splitter Amplitude Imbalance ............................................... 8
Verification ....................................................................................................................... 14
Verifying DC and Programmable Vertical Offset Accuracy.................................... 14
Verifying 50 Ω AC Amplitude Accuracy and Bandwidth ....................................... 17
Verifying 1 MΩ AC Amplitude Accuracy and Bandwidth...................................... 20
Verifying Timebase Accuracy.................................................................................. 23
Adjustment........................................................................................................................ 23
Worldwide Support and Services ............................................................................................. 29
ni.com/calibration
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Related Manuals for National Instruments PXIe-5185
Summary of Contents for National Instruments PXIe-5185
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Page 1: Table Of Contents
CALIBRATION PROCEDURE PXIe-5185/5186 This document contains information for calibrating National Instruments PXIe-5185/5186 digitizers. The PXIe-5185/5186 digitizers were developed jointly between Tektronix and National Instruments. The devices use Tektronix, Enabling Technology ™ to deliver wide analog bandwidth and high-speed sampling on the National Instruments Synchronization and Memory Core (SMC) technology with TClk synchronization. -
Page 2: 50 Ω And 1 Mω Devices
50 Ω and 1 MΩ Devices Early versions of the PXIe-5185/5186 support only 50 Ω input impedance. Check the part number of your device to see what input impedance is supported by your device: • PXIe-5185 module part numbers 199363x-0zL and PXIe-5186 module part numbers 193537x-0zL (where x is any letter and z is any number) only support 50 Ω... -
Page 3: Password
NI recommends a calibration interval of one year to ensure the warranted specifications for the PXIe-5185/5186 are met. Test Equipment National Instruments recommends that you use the equipment in Table 1 for calibrating the PXIe-5185/5186. If you do not have the recommended instruments, use these specifications to select a substitute calibration standard. - Page 4 Frequency range: DC to 5.0 GHz adapter SM4236 VSWR: <1.15 Impedance: 50 Ω SMA (m)-to- Fairview Microwave Frequency range: DC to 5.0 GHz SMA (m) SM4960 VSWR: <1.1 adapter (×2) Impedance: 50 Ω 4 | ni.com | PXIe-5185/5186 Calibration Procedure...
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Page 5: Test Conditions
Maintain Forced-Air Cooling Note to Users document available at ni.com/manuals • Plug the chassis/PC and the calibrator into the same power strip to avoid ground loops. PXIe-5185/5186 Calibration Procedure | © National Instruments | 5... -
Page 6: Calibration Procedures
MAX. Self-Calibration The PXIe-5185/5186 includes precise internal circuits and references used during self-calibration to adjust for any errors caused by short-term fluctuations in the environment. Allow a 25 minute warm-up period before you begin self-calibration. -
Page 7: Ni-Scope
These procedures characterize the amplitude imbalance of the two output ports of the power splitter over a range of frequencies. You must perform separate characterizations for the two different connector types used in verification. PXIe-5185/5186 Calibration Procedure | © National Instruments | 7... -
Page 8: Zeroing The Power Sensor
Connect the 50 Ω SMA terminator (f) to splitter output 1. Connect the other SMA (m)-to-SMA (m) adapter to the other output port of the power splitter. Refer to this assembly as splitter output 2. 8 | ni.com | PXIe-5185/5186 Calibration Procedure... - Page 9 11. Repeat steps 8 through 10 for each configuration in Table 2, recording each result as splitter output 2 power, where each configuration has a corresponding value. 12. Disconnect the power sensor and 50 Ω SMA terminator (f) from splitter output 2 and splitter output 1. PXIe-5185/5186 Calibration Procedure | © National Instruments | 9...
- Page 10 Amplitude level: the Test Point Amplitude value from Table 2 16. Configure the power sensor to correct for the Test Point Frequency value using the power sensor frequency correction function. 17. Use the power sensor to measure the power in dBm. 10 | ni.com | PXIe-5185/5186 Calibration Procedure...
- Page 11 Connect the 50 Ω BNC terminator (f) to splitter output 1. Connect the other SMA (m)-to-BNC (m) adapter to the other output port of the power splitter. Refer to this assembly as splitter output 2. PXIe-5185/5186 Calibration Procedure | © National Instruments | 11...
- Page 12 11. Repeat steps 8 through 10 for each configuration in Table 3, recording each result as splitter output 2 power, where each configuration has a corresponding value. 12. Disconnect the power sensor and 50 Ω BNC terminator (f) from splitter output 2 and splitter output 1. 12 | ni.com | PXIe-5185/5186 Calibration Procedure...
- Page 13 17. Use the power sensor to measure the power in dBm. 18. Repeat steps 15 through 17 for each configuration in Table 3, recording each result as splitter output 1 power, where each configuration has a corresponding value. PXIe-5185/5186 Calibration Procedure | © National Instruments | 13...
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Page 14: Verification
Fluke 9500B Accuracy Fluke 9530 1 MΩ input available on PXIe-5185 module part number 152962x-0zL and PXIe-5186 module part number 152961x-0zL, where x is any letter and z is any number. Verifying DC and Programmable Vertical Offset Accuracy To verify the DC and programmable vertical offset accuracy of the PXIe-5185/5186, compare the voltage measured by the device and the value sourced by the voltage standard. - Page 15 Compare the error to the Test Limit provided in Table 5. Repeat steps 2-8 for iterations 2 through 16 listed in Table 5. 10. Connect the calibrator test head directly to the channel 1 50 Ω input of the PXIe-5185/5186 and repeat steps 2 through 9.
- Page 16 Table 5. PXIe-5185/5186 DC and Programmable Vertical Offset Accuracy Limits Vertical Programmable Input Range Vertical Test Test Limit Iteration Impedance Offset (V) Point (V) pk-pk 50 Ω 0.08 ±0.0030 50 Ω -0.08 ±0.0030 50 Ω 0.25 0.33 ±0.0110 50 Ω...
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Page 17: Verifying 50 Ω Ac Amplitude Accuracy And Bandwidth
Verifying 50 Ω AC Amplitude Accuracy and Bandwidth Follow this procedure to verify the 50 Ω AC amplitude accuracy and analog bandwidth of the PXIe-5185/5186 by generating a sine wave and comparing the amplitude measured by the PXIe-5185/5186 to the amplitude measured by the power sensor. - Page 18 10 Vpp measure ± 42 V MAX TRIG ± 5 V SENSITIVE Power Sensor PXIe-5185/5186 SMA (f)-to-N(f) Adapter SMA (m)-to-SMA (m) Cable SMA (m)-to-SMA (m) Adapter SMA (f)-to-N (m) Adapter Power Splitter Signal Generator 18 | ni.com | PXIe-5185/5186 Calibration Procedure...
- Page 19 System Characterization section for the current Test Point frequency from Table 6. Use the PXIe-5185/5186 to acquire and measure the power using the Extract Single Tone Information VI, converting the result from V to dBm. Record the result as device input power.
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Page 20: Verifying 1 Mω Ac Amplitude Accuracy And Bandwidth
Verifying 1 MΩAC Amplitude Accuracy and Bandwidth Follow this procedure to verify the 1 MΩ AC amplitude accuracy and analog bandwidth of the PXIe-5185/5186 by generating a sine wave and comparing the amplitude measured by the PXIe-5185/5186 to the amplitude measured by the power sensor. - Page 21 SMA (f)-to-BNC (f) Adapter SMA (m)-to-N (f) Adapter Power Splitter Signal Generator 50 ΩBNC Feed-Through Configure the PXIe-5185/5186 with the following settings: • Vertical coupling: DC • Input impedance: 1 MΩ PXIe-5185/5186 Calibration Procedure | © National Instruments | 21...
- Page 22 15. Connect the 50 Ω BNC feed-through terminator to the channel 1 1 MΩ input of the PXIe-5185/5186. Connect splitter output 2 of the power sensor assembly to the 50 Ω BNC feed-through terminator and repeat steps 2 through 13 for each Iteration in Table 7.
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Page 23: Verifying Timebase Accuracy
Verifying Timebase Accuracy To verify the timebase accuracy of the PXIe-5185/5186 compare the peak frequency of a leveled sine wave measured by the PXIe-5185/5186 and the value sourced by the calibrator. Table 8 lists the settings. Table 8. PXIe-5185/5186 Timebase Accuracy Limits... - Page 24 If your module supports 1 MΩ input, follow steps 10 through 22. Otherwise, Note jump to step 23 to complete the adjustment. 1 MΩ input available on PXIe-5185 module part number 152962X-0ZL and PXIe-5186 module part number 152961X-0ZL, where X is any letter and Z is any number.
- Page 25 25. Configure the calibrator to output the voltage listed under Input (V) in Table 11 for the current iteration. Configure the load impedance of the calibrator to 50 Ω. 26. Enable the calibrator output. PXIe-5185/5186 Calibration Procedure | © National Instruments | 25...
- Page 26 The instrument handle from niScope_CalStart action: NISCOPE_VAL_ACTION_STORE save the results of the calibration You have finished adjusting the PXIe-5185/5186. Repeat the Verification section to reverify the performance of the digitizer after adjustments. 26 | ni.com | PXIe-5185/5186 Calibration Procedure...
- Page 27 0.135 0.075 0.065 0.055 0.045 -0.045 -0.055 -0.065 -0.075 -0.135 -0.32 -2.0 Table 10. PXIe-5185/5186 1 MΩ Input Parameters for Input Channel External Adjustment Iteration Input (V) 0.75 0.32 0.135 0.075 PXIe-5185/5186 Calibration Procedure | © National Instruments | 27...
- Page 28 Table 10. PXIe-5185/5186 1 MΩ Input Parameters for Input Channel External Adjustment (Continued) Iteration Input (V) 0.065 0.055 0.045 -0.045 -0.055 -0.065 -0.075 -0.135 -0.32 -0.5 -0.75 -1.0 -2.0 -3.0 -5.0 Table 11. PXIe-5185/5186 Input Parameters for External Trigger Channel...
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Page 29: Worldwide Support And Services
NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your software, the file on your media, or the National Instruments Patents Notice at . You can find patents.txt ni.com/patents...
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