[GreenKeys] An explanation needed

[hunybuny at eskimo.com]

Hi Jesse;

The transmissions are asynchronous.

For the standard Baudot code, there is a start bit, followed by 5
information bits, followed by a stop bit.

The start bit is always a SPACE code - which "trips" or "initializes"
action in the printer. The stop bit is always a MARK code.

What makes it possible to sync-up randomly is that the STOP bit is
about 1 1/2 times longer than the START and DATA bits.

Tuning into a station take the machine only a few cycles before
it is in step.

I don't have a TTY manual handy but it seems to me that the START and
DATA bits were 22 ms long and the STOP bit was like 31 ms or 37 or
something like that.

UE,
W6ESE - tony
NNNNZCZC

Jesse Hanchrow wrote:

> I would like to get an explanation at a very elementary level of how a 
> printer synchronizes with incoming Baudot code.  I would like it to 
> include diagrams of the equipment involved.
> For example, I believe a distributor is used:  if so,  how does it know 
> when to start rotating?
> 

-- 
Tony J. Podrasky | MicroSoft error messages written in Haiku:
                  |
                  |         You step in the stream,
                  |       But the water has moved on.
                  |         This page is not here.