Keysight E1418A VXI Module

Keysight E1418A VXI Module

Product Overview
The Keysight E1418A is a 16-channel 16-bit voltage and current source module designed for VXI-based test and measurement systems. It can generate precise DC voltage and DC current outputs for automated test equipment, calibration systems, instrument control, and electronic validation applications. The module supports SCPI programming and register-based control, allowing flexible integration into complex test platforms.

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Description

Keysight E1418A VXI Module

Technical Specifications

  • Brand: Keysight / Agilent Technologies
  • Model: E1418A
  • Product Type: 16-Channel 16-Bit Voltage/Current Source
  • Platform: VXIbus module
  • Channels: 16 independent output channels
  • DC Voltage Range: ±16 V
  • Voltage Resolution: 16 bits, 488 µV steps
  • Voltage Monotonicity: Monotonic to 2.0 mV
  • Voltage Accuracy: ±0.05% of value + 3.0 mV after calibration and within ±5°C of calibration temperature
  • Voltage Compliance Current: Greater than 20 mA from 0 to ±12 V, derating linearly to 5 mA at ±16 V
  • Voltage Short-Circuit Current: Less than 60 mA
  • Voltage Ripple and Noise: Less than 2 mV rms, 20 Hz to 250 kHz into 10 kΩ load
  • DC Current Range: -0.02 A to +0.02 A
  • Current Resolution: 16 bits, 610 nA steps
  • Current Monotonicity: Monotonic to 2.5 µA
  • Current Accuracy: ±0.09% of value + 5.0 µA after calibration and within ±5°C of calibration temperature
  • Current Compliance Voltage: ±12 V maximum
  • Current Open-Circuit Voltage: Less than 18 V
  • Current Ripple and Noise: Less than 2 µA rms, 20 Hz to 250 kHz into 250 Ω load

Functional Features

  • Dual Output Mode: Each channel supports voltage or current output.
  • 16-Bit Resolution: Provides fine output adjustment for precision applications.
  • SCPI Programming: Controlled through standard SCPI commands.
  • Register-Based Control: Supports direct register access for advanced integration.
  • Channel Independence: Each of the 16 channels can be programmed separately.
  • Output Enable Control: Outputs can be enabled or disabled through software.
  • Mode Switching: Channels can switch between voltage and current mode under program control.
  • Calibration Support: Stores voltage offset, voltage gain, and current calibration constants in non-volatile memory.

Application Scenarios

  • Automated test equipment
  • VXI-based measurement systems
  • Sensor excitation and simulation
  • Electronic component testing
  • Calibration and verification systems
  • Industrial control signal generation
  • Research and development laboratories
  • Production test fixtures

Performance Parameters

  • Output Channels: 16
  • Resolution: 16 bits for voltage and current
  • Voltage Accuracy: ±0.05% + 3.0 mV under specified conditions
  • Current Accuracy: ±0.09% + 5.0 µA under specified conditions
  • Voltage Range: ±16 V
  • Current Range: ±20 mA
  • Ripple and Noise: Low differential ripple for stable output
  • Programming Interface: SCPI and register-based control

Material Composition

  • VXI Module Housing: Metal enclosure for shielding and mechanical support.
  • Backplane Connector: VXIbus connector for communication and power.
  • Output Connectors: Front-panel terminals for voltage and current outputs.
  • DAC Circuitry: Digital-to-analog converters for precise output generation.
  • Output Drivers: Voltage and current output stages with compliance limiting.
  • Calibration Memory: Non-volatile memory storing calibration constants.
  • Control Logic: FPGA or processor-based control circuitry.

Structural Features

  • VXI Form Factor: Designed for standard VXI mainframes.
  • 16-Channel Density: Provides multiple outputs in a single module.
  • Front-Panel Terminals: Allows direct connection to test points.
  • Shielded Construction: Reduces electrical noise and interference.
  • Status Indicators: Module status visible through VXI system diagnostics.
  • Serviceable Design: Intended for integration into rack-mounted VXI systems.

Working Principle
The E1418A receives digital commands from a VXI controller through the VXIbus backplane. Each channel can be programmed for voltage or current output using SCPI commands such as APPLy, VOLTage, and CURRent. The internal DAC generates the requested analog value, and the output stage drives the load within compliance limits. The output relay can be opened or closed using OUTPut commands, allowing safe mode changes and output control. Calibration constants stored in non-volatile memory maintain output accuracy over time.

Installation Requirements

  • Install the module in a compatible VXI mainframe.
  • Ensure the VXI chassis power and cooling meet module requirements.
  • Verify that the VXI controller supports the E1418A.
  • Use appropriate cables for voltage and current connections.
  • Confirm load impedance and compliance limits before enabling output.
  • Install required drivers or SCPI support software.
  • Perform calibration checks according to maintenance procedures.

Precautions for Use

  • Do not exceed the ±16 V voltage range.
  • Do not exceed the ±20 mA current range.
  • Verify load compatibility before enabling output.
  • Use caution when switching between voltage and current mode.
  • Disable output before changing channel configuration.
  • Avoid writing directly to non-volatile calibration registers unless qualified.
  • Use the SCPI driver for calibration when available.
  • Keep firmware and driver software up to date.

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