Yes, you have to make all the audio preemphasized (from the autopatch IF USED) to match the user's audio which is preemphasized. I would not phrase it as "put de-emphasis on this & that & pre-emphasis & that & the other" since that also describes processed audio systems.
In most current configurations, this involves simply de-emph on the DTMF decoder (simple enough) which is the same thing you would do with the receiver in a processed audio system, so it's actually much easier than in an unprocessed audio system (half the work). Modern ham controllers even have that built in as a jumper option, so it's not as difficult as "put de-emphasis on this & that & pre-emphasis & that & the other" - it's more like "install jumpers 1, 2, and 3 in the A position during setup if you have autopatch or install jumper 1 in the A position if you don't have autopatch." Joe M. Bob Dengler wrote: > > At 3/15/2007 12:48 PM, you wrote: > >Yes, you should de-emph the audio going to a DTMF deocder and autopatch, > >and pre-emph the audio coming from the autopatch is using a flat audio > >response system. > > ...hence the source of all the confusion: to build a "flat audio response" > system you need to put de-emphasis on this & that & pre-emphasis & that & > the other so as to "shape" the flat audio coming in & going out so that > it's actually pre-emphasized. > > >-( ) > > Bob NO6B > > > Yahoo! Groups Links > > >
