National Instruments NI PXIe-5624 Calibration Procedure
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National Instruments NI PXIe-5624 Calibration Procedure

National Instruments NI PXIe-5624 Calibration Procedure

2 gs/s, 12-bit if digitizer
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Summary of Contents for National Instruments NI PXIe-5624

  • Page 1 PXIe-5624...

  • Page 2: Table Of Contents

    CALIBRATION PROCEDURE NI PXIe-5624R 2 GS/s, 12-Bit IF Digitizer This document contains the verification and adjustment procedures for the NI PXIe-5624R (NI 5624R) IF digitizer. Refer to for more information about ni.com/calibration calibration solutions. NI LabVIEW Instrument Design Libraries for IF Digitizers includes example FPGA images to use the NI 5624R in two modes of operation: •...

  • Page 3: Software

    Software Calibrating the NI 5624R requires you to install the following software on the calibration system: • NI LabVIEW 2014 Full/Pro or later • A version of the NI LabVIEW Instrument Design Libraries for IF Digitizers that is compatible with your LabVIEW version You can download all required software from ni.com/downloads Documentation...
  • Page 4 Table 1. NI 5624R Required Equipment Specifications for NI 5624R Calibration Equipment Recommended Model Measured Specification Minimum Requirements Power sensor Rohde & Schwarz (R&S) Test system characterization Range: -15 dBm to +10 dBm NRP-Z91 Verifying absolute amplitude accuracy Frequency range: 4 MHz to 2.005 GHz Adjusting absolute amplitude accuracy Power linearity: <0.1 dB VSWR: <1.11 at 2.005 GHz...
  • Page 5 Table 1. NI 5624R Required Equipment Specifications for NI 5624R Calibration (Continued) Equipment Recommended Model Measured Specification Minimum Requirements SMA (m)-to-SMA (m) — All procedures Frequency range: DC to 2 GHz cable Impedance: 50 Ω Maximum length: 1 meter SMA (f)-to-N (m) Fairview Microwave All procedures Frequency range: DC to 2 GHz...

  • Page 6: Test Conditions

    The connectors on the device under test (DUT) and test equipment are fragile. Perform the steps in these procedures with great care to prevent damaging any DUTs or test equipment. NI PXIe-5624R Calibration Procedure | © National Instruments | 5...

  • Page 7: Zeroing The Power Sensor

    Zeroing the Power Sensor Ensure that the power sensor is not connected to any signals. Zero the power sensor using the built-in function, according to the power sensor documentation. Characterizing Power Splitter Balance Zero the power sensor as described in the Zeroing the Power Sensor section prior to starting this procedure.
  • Page 8 Disconnect the power sensor and 50 Ω terminator from the power splitter. 10. Connect the power sensor to splitter output 1 using an SMA (m)-to-N (f) adapter. NI PXIe-5624R Calibration Procedure | © National Instruments | 7...
  • Page 9 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 Signal Generator 3.5 mm (m)-to-3.5 mm (m) Adapter SMA (m)-to-SMA (m) Cable Power Splitter 50 Ω...

  • Page 10: Self-Calibrating The Ni 5624R

    The as-left limits are equal to the published NI specifications for the NI 5624R, less guard bands for the measurement uncertainty, temperature drift, and drift over time. NI uses these limits to ensure that the NI 5624R meets the published specifications over its calibration interval. NI PXIe-5624R Calibration Procedure | © National Instruments | 9...

  • Page 11: Verification

    Verification The performance verification procedures assume that adequate traceable uncertainties are available for the calibration references. Verifying Internal Frequency Reference This procedure verifies the frequency accuracy of the NI 5624R onboard frequency reference using a signal generator. Use digitizer mode of the NI 5624R. Use Interactive IF in the Multirecord Acquisition sample project as Acquisition Without DSP (Host).vi...
  • Page 12 ------------------------ - year –6 temperature stability = ±2 × 10 Note You can find number of years since last adjustment programmatically using NI LabVIEW Instrument Design Libraries for IF Digitizers. NI PXIe-5624R Calibration Procedure | © National Instruments | 11...

  • Page 13: Verifying Absolute Amplitude Accuracy

    Verifying Absolute Amplitude Accuracy This procedure verifies the absolute amplitude accuracy of the NI 5624R input channel. Accuracy is specified using the calibration IP on the default 400 MHz acquisition FPGA image provided in the Multirecord Acquisition sample project. The Interactive Spectrum provides a starting point for this procedure.
  • Page 14 Figure 4. Absolute Amplitude Accuracy Verification Cabling Diagram ACCESS ACTIVE Power Sensor 6 dB Attenuator SMA (m)-to-N (f) Adapter NI 5624R Power Splitter SMA (m)-to-SMA (m) Cable 3.5 mm (m)-to-3.5 mm (m) Adapter Signal Generator NI PXIe-5624R Calibration Procedure | © National Instruments | 13...
  • Page 15 Configure the NI 5624R with the following settings: • DDC mode • Center frequency: The first frequency listed in the NI 5624R Center Frequency (MHz) column in Table 3. • I/Q rate: 500 MHz • Dither: On (High) Configure the signal generator with the following settings: •...

  • Page 16: Updating Calibration Date And Time

    ExternalCal v1 Host.lvclass:Write Ext Cal Date.vi in the current date and time. Call niIFDig External Cal v1 Host.lvclass:Close External . Set the write calibration to hardware? input to TRUE to store the Calibration.vi results. NI PXIe-5624R Calibration Procedure | © National Instruments | 15...

  • Page 17: Adjustment

    Adjustment This section describes the steps needed to adjust the NI 5624R to meet published specifications. Adjusting Internal Frequency Reference This procedure adjusts the internal frequency reference. Connect the signal generator RF OUT front panel connector to the NI 5624R IF IN front panel connector using an SMA (m)-to-SMA (m) cable.

  • Page 18: Adjusting Absolute Amplitude Accuracy

    Connect the splitter output 2 to the SMA (f) end of the 6 dB attenuator using a 3.5 mm (m)-to-3.5 mm (m) adapter. Note The power splitter configuration must match the configuration used in the Characterizing Power Splitter Balance procedure. NI PXIe-5624R Calibration Procedure | © National Instruments | 17...
  • Page 19 Connect the 6 dB attenuator SMA (m) connector directly to the NI 5624R IF IN front panel connector. The following figure illustrates the hardware setup. Figure 6. Absolute Amplitude Accuracy Adjustment Cabling Diagram ACCESS ACTIVE Power Sensor 6 dB Attenuator SMA (m)-to-N (f) Adapter NI 5624R Power Splitter...
  • Page 20 ExternalCal v1 Host.lvclass:Amplitude Cal Adjust.vi TRUE. 15. Call niIFDig ExternalCal v1 Host.lvclass:Close External . Set the write calibration to hardware? input to TRUE to store the Calibration.vi results to the NI 5624R flash memory. NI PXIe-5624R Calibration Procedure | © National Instruments | 19...

  • Page 21: Reverification

    NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS.

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