[aprssig] Question about 'H-bit' handling and WIDEn-N paths

[John Langtry, VE3NEC]

Hi Jim,

Well, :) "forever" is not really true, at some point
in bouncing from machine to machine, noise or QRM will
eventually damage the I-frame, and with the CRC now
wrong, the issued frame dies in the bounces.

Now it's been years since I played with the Layer 1
code (not connected I-frames), but the way this should
work, is that the transmitting station (WIDE3-3 to use
your example) has all the H (has been repeated) bits
unset.

When the frame hits the first N-N digi, it will take
this and set the "H" of the first wide and hopefully
replace the "generic" with the call sign of the machine;
In either case the first WIDE, will have the H bit set,
but the remaining two "WIDES" will be unset. (In this case,
there is even more logic in there to decrement the WIDEN-N
value.)

I'm not clear where you're headed with this one, and if
you could give us more details, I'm sure there are many
on the SIG that would be glad to help.

vy 73 de John VE3NEC
 905-877-7886
 IRLP node 2200