[Premium-Rx] WJ 8618B(S1) option games while snowed in

[Peter Gottlieb]

Another group member and I have been playing around with enabling options in 
firmware for the 8618B(S1) after I noticed a certain pattern in the EPROM data.

The first thing I did was enable tuning down to 0, and that required some mods 
to allow the receiver to do that.

Bored, today I decided to make a "God" chip with every option enabled.  There 
are a number of options I don't have but my receiver seems to run perfectly fine 
with this chip in it.  That had the effect of enabling tuning to 1200 MHz as 
well (the FEX-12 option). Now, I don't have the hardware for going there but 
discovered the receiver does indeed work (or at least mine does).  Sensitivity 
drops off a lot over 1150 MHz or so, dropping 50 dB from there to 1200 MHz.  I 
haven't looked at the docs, but maybe the change is simply to the highest filter 
section.  Not that there's anything to hear up there, but cool that now I can go 
from 0 to 1200 MHz in the one receiver.

Peter