DTMF TONES

COMMAND	FUNCTION	SCREEN CAPTURE	NOTES
*	Clear command		Should precede every command.  eg.   * command  #
#	Load command		Should follow every command.  eg.      * command  #
* 4 #	Return to received video		Cancel other functions that are running and return to received video
* 0 1 #	Colour Bar & 1 KHz Tone		Times out after approx 10 min
* 0 2 #	Test Sequence 1 & 1 KHz Tone		Times out after approx 10 min
* 0 3 #	Test Sequence 2 & 1 KHz Tone		Times out after approx 10 min
* 1 0 #	Beacon Mode		Several pages of text over colour bars
* 1 2 #	VK3RTV Information		Several pages of text
* 1 3 #	Signal report of station currently accessing VK3RTV		Reports signal strength received at VK3RTV in 5 steps
* 2 0 #	Local video repeater shack interior		Camera inside repeater building.
* 6 7 #	Repeater controller reset		Resets controller, similar to * 4 #

* Note *

Tones must NOT be distorted and are sent on the audio subcarrier of the signal accessing the repeater. Most commands take approx 5 seconds to load from the control computer.

The touch tones generate a corresponding binary code, TT01 = $01, TT02 = $02, TT0.TT3 = $03 etc etc. The micro reads the binary code whenever it gets TT#. TT* is really only required if you have incorrectly loaded a code. The decoder is reset after completion of the operation. The total control program for the repeater is written in 6800/68HC 11 assembler.