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PXIE-5653

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PXIE-5653
May 27, 2026

PXIE-5653

The PXIe-5653 is a 3U PXIe Local Oscillator (LO) Synthesizer Module from National Instruments, designed as a key component in high-performance RF vector signal analyzers (e.g., PXIe-5665/5668). It provides low-phase-noise LO signals and precision reference clocks for downconverters and digitizers, supporting RF/microwave test, radar, and electronic warfare (EW) applications.

Description

Model Nomenclature

  • PXIe: PXI Express high-speed modular instrumentation bus.

  • 56: NI PXI RF/IF test & measurement series.

  • 53: High-stability LO synthesizer with dual OCXO references.

Technical Specifications

  • Form Factor: 3U, 2‑slot PXIe module.

  • Frequency Outputs:

    • LO1: 3.2 GHz to 8.3 GHz (nominal), SMA 50 Ω.

    • LO2: 4.0 GHz (fixed), SMA 50 Ω.

    • LO3: 800 MHz (fixed), SMA 50 Ω.

  • Reference Clocks:

    • REF IN: 10 MHz, 2 Vpk‑pk max, SMA.

    • REF OUT (10 MHz): From onboard OCXO.

    • REF OUT (100 MHz): From onboard OCXO.

  • Phase Noise: Typically <‑130 dBc/Hz @ 10 kHz offset (1 GHz carrier).

  • Frequency Resolution: 0.001 Hz.

  • Settling Time: Fast locking for frequency hopping.

  • Power Consumption: +12 VDC, 1.10 A (3.63 W) typ; 4.00 A (48.00 W) maxNI.

  • Calibration Interval: 2 yearsNI.

  • Temperature: Operating 0 °C to 55 °C; Storage –40 °C to 70 °C.

Front Panel Connectors

  • REF IN: External 10 MHz reference input.

  • REF OUT (10 MHz): 10 MHz OCXO reference output.

  • REF OUT (100 MHz): 100 MHz OCXO reference output.

  • LO1 OUT: 3.2–8.3 GHz LO output (to PXIe-5606).

  • LO2 OUT: 4.0 GHz LO output.

  • LO3 OUT: 800 MHz LO output.

  • LEDs: ACCESS (status), LOCK (PLL lock indicator).

Core Features

  • High‑Purity LO Signals: Low phase noise for accurate RF downconversion and modulation analysis.

  • Dual OCXO References: 10 MHz and 100 MHz oven‑controlled oscillators for excellent frequency stability.

  • Wide LO Coverage: LO1 covers 3.2–8.3 GHz, supporting S‑ to X‑band radar and microwave test.

  • PXIe Integration: Seamless synchronization with PXIe‑560x downconverters and PXIe‑562x digitizers.

  • Fast Switching: Rapid frequency settling for swept‑tuned and hopping applications.

Application Scenarios

  • High‑Speed VSA Systems: PXIe‑5665/5668 RF vector signal analyzers.

  • Radar Test: LO generation for S‑band (2–4 GHz) and X‑band (8–12 GHz) radar signal analysis.

  • Electronic Warfare (EW): Low‑noise LO for signal interception and spectrum monitoring.

  • Semiconductor RF Test: Local oscillator for transceiver and power amplifier characterization.

  • Aerospace & Defense: Precision LO for satellite communication and SIGINT systems.

Usage and Maintenance Instructions

Installation & Configuration

Insert into a 2‑slot 3U PXIe chassis and secure the latch. Connect LO1/2/3 OUT to the corresponding LO IN ports of PXIe‑5603/5606 downconverters. Connect REF OUT (100 MHz) to the CLK IN of PXIe‑5622 digitizers. Optionally connect an external 10 MHz reference to REF IN for system‑wide synchronization. Power on the chassis; the module is auto‑detected by NI‑MAX.

Operation Guidelines

Allow 30‑minute warm‑up for OCXO stability. Verify LOCK LED is lit before measurements. Avoid exceeding +10 dBm at RF inputs. Use NI‑RFmx for LO configuration and synchronization with other PXIe modules.

Daily Maintenance

Keep SMA connectors clean and dry; tighten cables gently to avoid pin damage. Inspect cables/connectors monthly for wear or corrosion. Perform biennial calibration to maintain phase noise and frequency accuracyNI. Store in an ESD‑safe environment when not in use.


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