AN ACCURATE TWO-CHANNEL, REMOTE SETTABLE TIMER.
Technical rept. 8 Apr 64-20 Jul 66 on Phase 1,
AIR FORCE WEAPONS LAB KIRTLAND AFB NM
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An electronic timer system consisting of a 2-channel timer and a setting unit is described. The timer and setting unit are connected either by a 2- or 3-wire link or by a 2-way radio link. The timer system is settable from 1 to 20,000 sec in 1-msec increments. The frequency source is a crystal-controlled oscillator, accurate to or -2.5 in 10 to the 7th power over a voltage range of 21- to 31-V dc, a temperature range of 0 to 60 C, and a shock and vibration environment of a missile launch. The dual-channel timer was breadboarded oversize for teaching use, but the projected size and weight are less than 100 cu in. and 5 lb. The setting unit sets and monitors the timer for each command sent to the timer, an acknowledgement signal must be returned or the setting procedure stops and an error light flashes on.
- Electrical and Electronic Equipment