[GreenKeys] Stelma TDA-2

[Jim Cooper]

On 27 Dec 2021 at 16:41, William Wuttke wrote:

> Does anyone have an operational
> Stelma TDA-2? I am having trouble
> getting the trace adjusted to what I
> think should be correct. Does anyone
> have a photo of a correct trace? 

Actually, I have several in storage !! 
Just haven't gotten them out and prepped 
for 'advertising' ...  

They are an amazing piece of tty test equipment. 

It has a circular trace and when set up for the 
correct bits and speed, the dots on the screen 
should form a perfect vertical row ...  

If the vertical row 'bends' it indicates a 
speed problem;  if dots of the vertical row 
are staggered (not perfectly vertical) it indicates 
timing problem(s) with the individual bits (and 
thus the contacts of whatever is sending...) 

Hope that helps the interpretation a bit. 

Jim  w2jc