A device which inserts data into the video bit stream based upon a supplied key signal. The data can be video/audio overlay, or broadcast data
An electronic circuit that creates a control signal to control a video multiplier based on selective information contained in a video signal.
Electronic device for sending Morse Code semi-automatically; connects to a key (see above). Dits are sent by pressing one paddle [of the key], dahs sent by pressing the other one (courtesy of VE3FFK).