Thanks Doug,
When i programmed the chip and installed it onto the board i set up the 8 Dip
switches to agree with the 127 channel coding positions.
The original chip had the Channel 1 freq with 8 + 1 dip switches off on the
eprom board and this is where i have placed the new frequency, keeping the same
dip positions.
The only other option that PGM800 offers is the channel step ( 12.5 mhz ) and
this appears to be non adjustable in the software.
If you could elaborate on the reference oscillator issue i would be grateful,
is this a software controlled adjustment or a hardware adjustment somewhere in
the Synth section on the main board.
Regards,
--- In Repeater-Builder@yahoogroups.com, Doug Bade <k...@...> wrote:
>
> If you have the wrong reference oscillator selected, it will create
> steps that are invalid.. and thus syth unlock..
> The ref osc for factory standalone units is based on 12.8 mhz but there
> is an optional 10.0 mhz ref osc.. and it can be external or internal.
> The PLL steps are calculated from that osc and the desired step size.
> You also need to select a channel in the channel switches that is
> occupied, it can be from 1-64 and the prom needs to be programmed
> accordingly..
>
> Doug
>
> >
> >
>
