Agilent/Keysight 85556A

The Keysight 85556A is a 1×12 fan-out cable splitter that expands a single control port of the 85523A/B CalPod controller to manage up to 12 CalPod modules simultaneously. This configuration enables distributed control across multiple test and measurement points, with the flexibility to cascade up to four 85556A splitters on a single controller for managing up to 48 CalPod modules total. The splitter is engineered for operation in thermal and thermal-vacuum chamber environments, supporting demanding automated test scenarios where environmental constraints are critical.

Technical Specifications

• Fan-out configuration: 1×12


• Maximum CalPod modules per splitter: 12


• Maximum total modules with four splitters: 48


• Environmental operating environments: Thermal and thermal-vacuum chambers

Key Features

• Single-port expansion multiplies control capacity without requiring multiple controller units


• Cascadable design - stack up to four units on one 85523A/B controller


• Thermal and vacuum chamber compatible for specialized test environments


• Cable splitter architecture for straightforward integration

Typical Applications

• Multi-point temperature or environmental monitoring in test chambers


• Parallel calibration or measurement distribution across many modules


• Scalable automated test setups requiring centralized controller management


• High-channel-count systems within constrained physical spaces

Compatibility & Integration

• Primary Controller: Keysight 85523A/B CalPod controller


• Controlled Devices: Keysight CalPod modules


• Designed to integrate directly with existing CalPod systems without additional hardware or firmware modifications