Rohde and Schwarz NGT20 System Power Supply

The Rohde & Schwarz NGT20 (117.7133.02) is a triple DC power supply delivering three independent, isolated outputs for simultaneous multi-device testing in development, manufacturing, and laboratory environments. Channels A and B serve linear IC applications with flexible series, parallel, and tracking operation modes. Channel C provides a dedicated 6 V, 5 A output optimized for digital IC supply.

The unit combines high-resolution voltage setting via ten-turn potentiometers with fast regulation recovery - under 30 µs in voltage priority mode and under 50 µs in current priority mode - making it suitable for both standard and current-sensitive loads.

Technical Specifications

• Model: Rohde & Schwarz NGT20 (Order Number: 117.7133.02)


• Output Configuration: 3 independent, isolated channels


• Channel A & B: Linear IC supply; configurable in series, parallel, or tracking mode


• Channel C: 6 V, 5 A dedicated output for digital ICs


• Voltage Setting: High-resolution control via ten-turn potentiometers; 0.1 × maximum output voltage per turn (example: 2 V per turn on 20 V channel)


• Current Limiting: Rectangular characteristic with independent threshold setting per output; 10-division scale resolution


• Overvoltage Protection (Channel C): Continuously adjustable threshold from 4.5 V to 10 V; thyristor-shorted output on threshold breach


• Regulation Recovery: <30 µs (voltage priority mode); <50 µs (current priority mode)

Key Features

• Short-circuit proof outputs across all channels


• Reverse current protection on all outputs


• Polarity protection integrated into all outputs


• Tracking operation enables proportional negative voltage adjustment relative to positive voltage


• Series connection supports higher voltage output


• Parallel connection supports higher current output


• High-resolution regulation with oscillation prevention


• Scaled potentiometers ensure reproducible current limit settings

Typical Applications

• Linear and digital IC characterization and validation


• Multi-rail power delivery for complex circuit testing


• Current-sensitive device evaluation requiring fast transient response


• Simultaneous dual-supply testing with tracking or independent voltage control