Matt wrote:
> Hi everyone,
>
> Here's a question regarding DCS......
>
> Has anyone any experience of encoding a CTCSS tone of, say 77Hz, and a DCS
> code at the same time? Is the digital code going to mix with the CTCSS tone
> and produce a bunch of harmonics that make the repeater sound horrible?
>
> I'd like to add DCS to my 6m repeater and perhaps try and experiment with
> something along the lines of Yaesu's ARTS system, by getting the DCS encoder
> to key the repeater and send a quick burst of DCS a second or so after it
> has been triggered by a burst from a mobile with ARTS turned on.
>
> Just something I was thinking about......
>
> Any experience or thoughts gratefully received,
>
> Thanks,
>
> Matt
Several years ago I tried that with a service monitor and an outboard
DCS generator, and a radio programmed with both the tone and DCS code in
'ch 1/ch2' configuration (I think the radio was a new at the time
Kenwood, like a TK-860 or something). If I set the tone to 700hz dev,
when I started turning up the DCS level, just about the point where it
would start decoding, tone would stop decoding, and vice-versa. I
couldn't find a level that would allow both to decode, it was always one
or the other.
And bear in mind, this was using the near perfect modulation of the
wavetek service monitor. Getting a normal radio to generate that clean a
waveform, especially DCS, is rare.
You can try it, but I have my doubts that it will work.
--
Jim Barbour
WD8CHL
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