Variable Clock Type R401

Summary: The R401 Variable Clock is an RC-coupled oscillator designed to provide timing pulses for large systems. It generates a standard 100-nanosecond pulse with a frequency range adjustable from 30 cycles per second (cps) to 2.0 megacycles (mc).

Key features include:

• Frequency Control: Coarse frequency adjustment is achieved via five internal capacitors, while fine adjustment is handled by a built-in 20,000-ohm potentiometer. External components can also be connected for additional flexibility.
• Performance: The unit maintains high stability, with frequency variation of less than 1% for a 20% power supply change and a pulse-to-pulse jitter of less than 0.2%.
• Input/Output: The clock is gate-controlled, enabled by a -3v level or an open circuit. The output is a -3v to ground pulse capable of driving a 70 ma external load.
• Power Requirements: Operates on +10v (1.3 ma) and -15v (19 ma) power supplies.