The Keysight 1143A is a probe offset control and power module that supplies independent power and programmable offset voltage to dual active probes in measurement systems where direct oscilloscope front-panel powering is unavailable. It delivers stable ±17.3 Vdc output with 300 mA per rail and enables two independently operated probes with offset adjustment from ±50 V at variable current up to ±5 mA per channel. Rear-panel 9-pin D-subminiature connectors and remote control input support flexible system integration. Designed for the Keysight 54700-series and 54701A active probes, the 1143A operates reliably across 0°C to +55°C and altitude to 4,600 meters.
Technical Specifications
• Positive Power Output: +17.3 Vdc ±150 mV
• Negative Power Output: -17.3 Vdc ±150 mV
• Maximum Current per Supply: 300 mA
• Programmable Offset Range: ±50 V
• Offset Current Control: 0 to ±5 mA variable
• Independent Channels: 2 probes
• Offset Control Interface: 9-pin D-subminiature rear connector
• Input Voltage: 90–132 Vac / 198–264 Vac
• Input Frequency: 47 to 440 Hz
• Power Consumption: 40 VA maximum
• Operating Temperature: 0°C to +55°C
• Operating Humidity: Up to 95% RH (non-condensing) at +40°C
• Operating Altitude: Up to 4,600 meters (15,000 ft)
• Vibration Tolerance: 0.3 grms (5–500 Hz random, 10 min per axis)
• Dimensions: 211 mm × 173 mm × 78 mm
• Net Weight: 1.5 kg
– Key Features
• Dual-channel independent offset control
• Remote offset control input for automated test systems
• Compact form factor with universal AC input range
• Stable supply voltage tolerances ensure probe accuracy
– Compatibility & Integration
The 1143A pairs with Keysight 54700-series and 54701A active probes, making it suitable for 50-ohm measurement systems where dedicated probe power is required. A 1.5-meter probe power extension cable (Option 001) is available for systems requiring offset connections beyond the module’s rear panel.
Note: This product is obsolete and no longer manufactured due to non-compliance with EU RoHS Directive 2011/65/EU.
