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The Krohn-Hite Model 1200A is a legacy, high-precision Linear Sweep Function Generator known for its analog warmth and reliability. Designed for lab, production line, and audio testing, this unit combines a main function generator with an auxiliary ramp generator in a single rugged chassis .
Unlike modern digital generators, the 1200A is celebrated by audio engineers and electronic musicians for its “thick” analog sound characteristics, making it desirable for both bench testing and modular synth setups . It features exclusive WAVEGUARD™ protection to prevent damage from accidental voltage feedback, ensuring longevity even when used in unpredictable environments .
Key Technical Specifications
Detailed Features & Benefits
Versatile Waveform Generation
Provides clean sine, square, and triangle waves from sub-sonic frequencies (0.2Hz) up to 3MHz. Ideal for audio response testing, filter network design, and general troubleshooting .
Advanced Linear Sweep Capabilities
The 1200A excels at frequency sweeps. It supports linear sweeps in both up and down directions across a 1500:1 range. The internal sweep rate is fully adjustable from a slow ramp of 1000 seconds to a fast sweep of 1 millisecond .
Built-in Waveguard Protection
A common issue with older generators is blown output transistors. The Krohn-Hite 1200A features WAVEGUARD™, a circuit that automatically clamps external voltages to ground if accidentally applied to the output, resetting automatically once the fault is removed .
Multiple Outputs for Complex Systems
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Main HI/LO: Simultaneous 0dB and -20dB outputs.
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TTL Output: Capable of driving up to 10 TTL loads with fast 15ns transitions.
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Ramp Output: Independent +5V linear ramp (0.001Hz to 1kHz) usable even when the main generator is not sweeping .
Applications
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Acoustic & Audio Testing: High-fidelity sound system analysis.
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Education: Engineering labs and university electronics courses.
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Production Line: Testing amplifier and filter networks .
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Synth Lab: Analog modular synthesizer sound source
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