[Kenwood] DTMF tones

[Roy Morgan]

At 03:54 PM 8/27/02 -0500, G A Gutmann wrote:
>Hi fokes:
>Does someone out there have the DTMF frequencies that are used on the 
>touch tone
>pads of the 2 meter radios?

See:
<http://www.ece.utexas.edu/~mason/codesign/dtmf.html>

>DTMF stands for Dual-Tone Multi-Frequency. That is, a DTMF signal is one 
>that consists of only the sum of two pure sinusoids at valid frequencies. 
>We will
>provide a pathetic table describing the frequencies that compose the tones:
>
>
>                 1209Hz 1336Hz 1477Hz 1633Hz
>                   |      |      |      |
>                  .-.    .-.    .-.    .-.
>          697Hz -( 1 )--( 2 )--( 3 )--( A )
>                  >-<    >-<    >-<    >-<
>          770Hz -( 4 )--( 5 )--( 6 )--( B )
>                  >-<    >-<    >-<    >-<
>          852Hz -( 7 )--( 8 )--( 9 )--( C )
>                  >-<    >-<    >-<    >-<
>          941Hz -( * )--( 0 )--( # )--( D )
>                  `-'    `-'    `-'    `-'



>Are they the same as a regular touch tone pad on a
>telephone?

I think so, but I don't know.

>  The telephone has 12 buttons and some of the radios have 16 buttons.
>What frequency do you transmit when you push each one of these 16
>buttons?-------Tnx


Each button produces two frequencies.  See the website above if what I 
pasted from it does not reproduce well.

Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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