The Longwei LW-1641 is a highly stable, multi-functional, and broadband signal source designed for versatile waveform generation. With a clean, easy-to-read 6-digit LED frequency counter and an elegant, durable chassis, this instrument is exceptionally reliable for electronic circuit testing, laboratory pulse circuit experimentation, scientific research, and educational training.​Whether you need standard waveforms or custom signaling configurations, the LW-1641 delivers precise output variables across a wide frequency range.

​Multi-Waveform Generation: Directly produces sine, triangle, square, positive/negative pulse, and positive/negative ramp waveforms.

​Integrated Frequency Counter: Built-in 6-digit LED system dual-functions as a real-time monitor for internal frequency output and an external counter to measure outside frequencies. Voltage-Controlled Frequency (VCF): Features a VCF input control function with a maximum volt-controlled ratio up to 1000:1, enabling reliable frequency sweeping and adjustments via an external source.​ Dedicated TTL/CMOS Outputs: Offers fully synchronized TTL/CMOS pulse outputs that step alongside the main signal terminal, accommodating various logic-level circuitry workflows