[GreenKeys] Moonbounce teletype?

[tony.podrasky]

GE OMs;

I'm trying to figure out how to ask the question I want to ask
but I can't put it into words as of yet.

Let's try with a simplified version:

WHY would it be a problem/matter if the receiving station is on
character #1 while the sending station is on character #54?

UE,
K2EAA - TONY
NNNN
ZCZC

On 08/10/2017 03:25 PM, Jim Haynes wrote:
> The late Walt Zenner, V.P. of R&D at Teletype Corp., contributed to a
> history of the company that was privately printed in a very small run.
> Here's what he had to say about that.
>
> "Shortly after World War II, the Navy staged a demonstration in which
> a radar set was used to send a teletype signal to the moon with the
> reflection being received in hawaii, where it was retransmitted
> back to the moon with the reflection being received in Washington.
> The travel time for this double trip was reported as 5.4 seconds.
> At the rate of 100 words per minute (10 characters per second) 5.4
> seconds equals 54 character time periods.  With continuous transmission,
> this means that while character #1 is being received, character #54
> is being transmitted and that a total of 54 are in transit.  Using
> the system in vogue before Howard Krum's invention, where both the
> send and receive distributors are started simultaneously, the received
> signals and the receiving distributor would be out of synch by 54
> characters.  With the Krum system [start-stop] the receiver waits
> patiently until the signal arrives, when it starts in synch with the
> incoming signal.  In the Navy test, the Model 28 printer operated
> correctly."
>
> This is part of a discussion of Howard Krum's invention of the
> Start-Stop system.
>


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