[aprssig] Re: D7 Flow Control

[Bill Vodall]

> >>> wa7nwp at jnos.org 1/6/05 9:36:53 PM >>>
> >Flow control on RF is another part of the problem.   
> >Packets at 9k6 come in too fast for the unit to handle them.
> 
> Well, I hate to see blanket statements like that without
> qualification.  It would be better to say:
> 
> On systems not designed for the overhead of AX.25 on RF, 
> and the application, "packets at 9k6 can come in too fast 
> for the unit to handle them."
> 
> Would be a better statment I think.  As long as the designer 
> recognizes that continuous data at 9600 baud on an AX.25
> packet system can actually produce data throughput rates 
> as high as 19,200 baud or higher and designs accordingly,
> then they will work just fine.
> 
> Like anything else, the system has to be "designed", not
> just grab somethig with a 9600 baud label on it and hook
> it up.... and then wonder why it doesnt work...


I stand by my statement.   The packets on RF are coming in at
9600.  That includes all the overhead and control bits.  Actual
data is going to be something like 3/4 of the raw 9600 bit rate,
not twice that.

If somebody puts a 9600 baud label on something, shouldn't it
work at 9600?

Bill


Bill