[GreenKeys] 28 TD questions

[Robert McConnell]

Hi Gil,

You may have trouble measuring it, unless it's way out of specs. The 
requirement was no more than 1 micro volt p-t-p measured on a dipole 
antenna one meter from the open front of the cabinet. If all the shielding 
is grounded correctly, and there's no significant corrosion, this low 
emission level was quite easy to maintain. If you can find a set of rabbit 
ears off a small TV that allows the two elements to open up to 180 degrees, 
and replace the 75 ohm or ribbon cable with six feet of 50 ohm, you will 
have a pretty close approximation of the antenna we used.

Bob McConnell
N2SPP

At 1/23/02 10:51 AM -0700, gil smith wrote:
>Hi Jack:
>
>
>Hmm, you were harrassing me about using a scope, but here's a good use:  I
>don't know what this TD is geared for, so I can now look at the bit times.
>Yeah, yeah, I could just try all the wpm possibilities I suppose.  Well, I
>still need to get the 232 levels correct.  OK, I could still do that with a
>meter.  Maybe I'll need to pull out the spectrum analyzer then, and see how
>quiet this tempest stuff is.
>
>thanks for the info,
>
>gil