Agilent / Keysight E1437A VXI 20 MSa/s 23-bit Digitizer with Filters and Memory

The Agilent/Keysight E1437A is a C-size, single-slot VXI digitizer engineered for high-precision signal acquisition and analysis. Operating at 20 MSa/s with 23-bit ADC resolution, it captures complex signal details required for advanced digital signal processing applications. The module delivers spurious-free dynamic range to -110 dBfs, linearity to 110 dBfs, and noise density of -140 dBfs/Hz at full resolution.

Technical Specifications

Digitizer Performance

• Resolution: 23-bit raw ADC


• Sample rate: 20 MSa/s


• SFDR: Up to -110 dBfs (18 bits effective)


• Noise density: -140 dBfs/Hz


• Linearity: Up to 110 dBfs at 20 MSa/s


• Spurious signal contamination: At least -110 dBfs


• Real-time distortion correction: Fixed nonlinearities reduced to ≥110 dB below full scale; soft distortion to ≥70 dB below applied carrier level Input and Signal Conditioning


• Anti-alias filter: 8 MHz


• Input bandwidth: 8 MHz (filtered), 40 MHz (unfiltered)


• Digital filters: 24 real-time decimation type


• Digital local oscillator: Included


• Analog signal conditioning: Built-in Memory and Data Transfer


• FIFO memory: 8 MB standard (64 MB optional)


• VXIbus port transfer rate: 1 MB/s typical


• Local bus transfer: Up to 60 MB/s burst; 40.96 MB/s continuous Timing and Synchronization


• Sample clocks: Two standard


• Internal clock: 20 MHz, 20.48 MHz


• External reference clock: 20 MHz phase-lockable


• Flexible triggering and synchronization

Key Features

• Single-slot C-size VXI module for compact system integration


• 23-bit resolution with distortion correction for enhanced signal fidelity


• Dual memory options accommodate varying acquisition duration requirements


• High-speed local bus enables sustained 40+ MB/s data transfer


• 24 programmable filters enable in-module signal conditioning and bandwidth optimization

Typical Applications

• Signal monitoring in digital signal processing workflows


• Multi-channel data acquisition systems


• RF and baseband signal analysis


• Test and measurement environments requiring high-resolution transient capture

Compatibility & Integration VXI plug-and-play architecture. Supported on Windows 3.1, Windows 95, Windows NT, Windows 2000, and HP-UX platforms.