[GreenKeys] strange Teletype?

[jhhaynes at earthlink.net]

It's called Monopulse, is a Teletype product designed for very short
distance transmission, such as within a plant.  It depends on the
transmitter and receiver being on the same power system, so that the
sync motors in both remain pretty much in phase.

The beginning of a pulse from the transmitter starts the typewheel
rotating in the printer.  The end of the pulse from the transmitter
causes the print magnet to operate at the current position of the
typewheel.  Hence each character is a single pulse, the time duration
of which determines which character will print.


jhhaynes at earthlink dot net