Keysight (Agilent) 1143A Probe Offset Control and Power Module

The Keysight (Agilent) 1143A is a dedicated probe offset control and power module engineered to extend the measurement capabilities of compatible Keysight 54700-series probes. The unit delivers dual-polarity power while providing independent, programmable offset adjustment for up to two probes simultaneously. This combination enables engineers to isolate specific signal components, accommodate varying input sensitivities, and extend dynamic range in demanding test environments where the primary instrument lacks integrated probe power or advanced offset functionality.

– Technical Specifications

Power Output
• Positive supply: +17.3 V ±150 mV
• Negative supply: –17.3 V ±150 mV
• Maximum current per supply: 300 mA
• Input power: 90–132 Vac or 198–264 Vac, 47–440 Hz
• Maximum power consumption: 40 VA

Offset Control
• Programmable offset capability: ±50 V
• Offset current range: 0 to ±5 mA
• Remote offset input: –10 to +10 Vdc
• Remote offset output at probe connector: –5 to +5 mA dc (–57.5 to +57.5 Vdc with 54701A probe)
• Control interface: 9-pin D-subminiature connector (rear panel)
• Local adjustment: Local/Remote switch and Zero/Variable switch

Physical & Environmental
• Dimensions: 211 × 173 × 78 mm (8.3 × 6.8 × 3.1 in)
• Net weight: 1.5 kg (3.4 lbs)
• Operating temperature: 0 to 55°C
• Operating humidity: 95% relative at 40°C
• Indoor use only

– Key Features

• Independent dual-probe operation with separate offset control per channel
• Programmable offset via rear-panel 9-pin connector for system integration
• Local offset adjustment via front-mounted controls for bench-level tuning
• Dual-polarity regulated power supplies meeting ±150 mV tolerance
• Compact form factor rated for extended temperature operation

– Compatibility & Integration

• Designed for Keysight 54700-series probes
• 54701A probe compatible with any 50 Ω input instrumentation when paired with 1143A
• Front-panel probe power connector for direct probe attachment
• Optional 01143-61602 extension cable (1.5 m) available for remote probe placement