The answer has multiple paths.
First... the mfgrs specified tone levels, which are obviously
different from high, low level (guard tone) and you should also
consider the/and & all command/function tones.
Second... what values you at the receive end need to make things
work. What actually works in the decoder and its dynamic range.
See my previous post about the original silver-box Motorola Decoder
being a much better animal vs the Vega Solid state decoder.
Third... the path/line loss & EQ loss. Have you swept the path/line
before you set your levels?
Fourth... the control source levels and their respective adjustments.
It's what you use the "tims" test set for... to sweep the line/pair
and check the loss. In really bad locations I know of more than one
"event" where the inbound source is blown out higher than zero dB
in... :-) Sometimes it's just the way things happen.
The Motorola T-1502 series tone remote manual has a pretty good
description of how tone signaling works. After enough tone remote war
stories the ("enough") level is what actually works and performs
well while trying to "stay legal" or at least at some value where
the the evil eye of Sauron (the line provider) doesn't turn on you
that you burst into flames.
Microwave tone path levels are another story... and of course all
bets are off on older analog State Government Microwave paths. :-)
cheers,
s.
> "Tim S" <[EMAIL PROTECTED]> wrote:
> Anyone know the answer to the original question.
> How do you make sure you have enough high level, function,
> and low level guard tones at the repeater input?
>
> The way I see it you have the keyer output into the phone
> line to make your initial adjustment. Then the repeater
> has a line input as well.
>
> Keyer Odbm -> telco loss -16db -> repeater in -16db ->
>
> -Tim
>
