[Elecraft] Why predistortion ?

[Drew AF2Z]

That's funny, I was also thinking of astronomy-- the Schmidt-Cassegrain 
telescope where the inherent aberrations of the relatively simple 
spherical mirror is corrected (pre-distorted?) with a lens...

73,
Drew
AF2Z




On 09/15/20 18:39, Fred Jensen wrote:
> Didn't the term "pre-distortion" originate in the astronomy world where 
> one creates an artificial star with a powerful laser, and then distorts 
> the telescope mirror in real time to minimize atmospheric effects 
> [twinkling]?  That also reduces the twinkle on real nearby stars too. 
> Maybe that's something else.  Pre-emphasis/De-emphasis in FM broadcast 
> [and analog land mobile FM] is sort of pre-distortion too.
> 
> 73,
> 
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
> On 9/15/2020 3:55 PM, Andy Durbin wrote:
>> " Now I understand better what the discussion is all about."
>>
>> Who ever coined the term "predistortion" should be taken behind the 
>> bicycle shed and introduced to a 2x4.  The terminology is the epitome 
>> of obfuscation!
>>
>> Andy, k3wyc
>>
> 
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