A CODED TIME SIGNAL GENERATOR FOR USE ON GUIDED WEAPON RANGES
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)
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The equipment is auxiliary to a central timing system which provides common timing and reference signals to all measuring and recording stations on the range. The coder supplies pulses that serve as time markers and indicate the elapsed time, at any instant, with respect to an arbitrary zero, that is the time at which the weapon is fired. The signal is useful where many long runs of recording film are being analysed, since it is not necessary to count up timing marks along the length of the film. It is also useful where recording equipment is switched on after zero time since it still permits the recording to be related in time to that of other range recorders. The timing pulses are spaced at 0.01 second intervals with a double pulse every 0.1 second. The groups of pulses between the double marks are read as binary numbers which indicate the number of tenth seconds that have elapsed to the preceding 0.1 second markers. Elapsed time can thus be read to within less than 0.01 seconds. the coder normally counts up to 51.1 seconds and then recycles it can, however, be readily adapted to have a counting capacity of 511 seconds.
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