🚀 go-pugleaf

John Larkin wrote:
> On Thu, 25 Jun 2009 12:56:30 -0700, Joerg <invalid@invalid.invalid>
> wrote:
> 

[...]

>> Probably the litmus test for RF stuff like this is when people schlepp 
>> it to Otis Street and see if it can survive Sutro Tower.
> 
> It's terrible here. Scope traces are gross fuzz, and all sorts of
> opamp front-ends like to rectify stuff.
> 
> You should see the spectrum of a 10" clip lead.
> 
> http://www.jimprice.com/sutro/tower1.jpg
> 

Once I took off on a Europe flight out of SFO and the antenna top stuck 
out of the clouds while the rest of the tower was in the white. Picture 
perfect, and I had my camera in the overhead <aargh>. I could still bite 
myself, that opportunity never came again.


> We did do a useful simulation of a system that has a superconductive
> magnet/front end on one side of a room and some ADCs on the other
> side. We convinced ourselves that we need to go differential.
> 

Yesterday I had my comeuppance WRT to the Instek GDS-2204 scope that I 
thought is so much better than Tektronix. In many ways it is, and also 
doesn't have the nasty conducted emissions on the probe cables. But when 
debugging 74MHz gear I could not figure out where a weird buzz was 
coming from. Until I turned off the scope ...

-- 
Regards, Joerg

http://www.analogconsultants.com/

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