Arrangement for providing signalling tones and volume...

Details Arrangement for providing signalling tones and volume... Arrangement for providing signalling tones and volume...

H - Electricity

04

B

325/15

H04B 1/40 (2006.01)

Patent

CA 1208295

ARRANGEMENT FOR PROVIDING SIGNALLING TONES AND VOLUME CONTROL SIGNALS ABSTRACT OF THE DISCLOSURE A keyboard with number and volume control push- buttons is provided with a microcomputer, a digital-to- analog converter, and an output circuit to provide signalling tones to a radio transmitter in response to operation of the number pushbuttons, and to provide volume control signals to a radio receiver in response to operation of the volume control pushbuttons.

459907

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