REFLECTOR: Trig TT-31 ADS-B transponder

[John Dibble]

I have my new transponder installed and it isn't sensing the serial 
input from my RMI encoder.  Before I spend more time on that, I'm 
considering just using the gray code input which is available from the 
previous transponder.  I was told that serial is better.  Can anyone 
comment on that?  Also the serial out from my encoder currently goes to 
my gps to enhance satellite reception.   The gps calls for 1200 baud 
while the transponder calls for 9600.  Does this mean I can't use serial 
for both?  If so, how important is the enhancement of gps reception?

Thanks,

John