Keysight / Agilent / HP E1438D 100 MSa/s Digitizer with DSP and Memory

The Keysight/Agilent/HP E1438D is a single-channel C-size VXI digitizer delivering 100 MSa/s (selectable to 102.4 MSa/s) signal acquisition with integrated Digital Signal Processing for high-speed measurement and analysis. Engineered for demanding ATE and radar test environments, the E1438D combines a 40 MHz anti-alias filter, –90 dBfs spurious-free dynamic range, and 144 MB expandable RAM with dual high-speed data interfaces: a 2.5 Gbit/sec optical front panel port (VITA 17.1 Draft compliant, multi-mode fiber, 850 nm, up to 100 m) and VXI local bus connectivity. The 50 Ω input accepts DC or AC coupling with configurable attenuation across 17 dB steps (30 dBm to –21 dBm) and programmable digital decimation filters spanning 40 MHz to 305 Hz center frequency.

Technical Specifications Signal Acquisition

Sampling Rate: 100 MSa/s or 102.4 MSa/s (software selectable)

Input Bandwidth: 0–40 MHz

Input Impedance: 50 Ω (>18 dB return loss, 1.3 VSWR)

Input Coupling: DC or AC (0.2 µF)

Analog Input: BNC connector, shell grounded

ADC Overload Level: 0 dBfs typical Dynamic Range and Filtering

Input Range: 30 dBm to –21 dBm (3 dB steps, 10.0 Vp to 28.2 mVp)

Spurious-Free Dynamic Range: –90 dBfs

Anti-Alias Filter: 40 MHz with bypass

Harmonic Distortion: –85 dBc typical (3rd order, –25 dBm 13 MHz signal, –15 dBm range)

Digital Decimation: Tunable center frequency, 17 octave steps (40 MHz to 305 Hz) Memory and Interfaces

FIFO Memory: 144 MB RAM (expandable to 1.2 GB)

Optical Data Port: 2.5 Gbit/sec, VITA 17.1 Draft, multi-mode fiber 850 nm, max 100 m (>200 MBytes/sec throughput)

VXI Local Bus: 66 MBytes/s data transfer rate

FPDP: 2.5 Gigabit/second

VXIbus: Standard communication

Key Features

Programmable input attenuation with fine resolution across wide dynamic range

Integrated DSP with tunable decimation filters for post-acquisition analysis

Dual optical and electrical data paths for flexible system integration

144 MB base memory expandable for extended acquisition windows

Typical Applications

Automated test equipment (ATE) for RF and baseband signal characterization

Radar and pulse signal analysis

High-speed transient capture

Compatibility & Integration Operates within VXI chassis architecture with direct module-to-module data transfer via local bus. Optical FPDP port accommodates long-distance data streaming in distributed test systems.