[Milsurplus] LO radiation

[Bob Camp]

Hi

Tempest compliance is a real issue in some areas. There have been some 
significant documented intelligence exploits of gear that was not 
Tempest compliant. The whole idea behind what has been done is to make 
it theoretically impossible to do a radiation based exploit on a piece 
of certified gear. What does and does not need certification is handled 
by a government agency (with predictable results).

You'll get no argument out of me that the whole thing gets carried 
*much* further than is justified.

	Take Care

		Bob Camp
		KB8TQ



On Mar 27, 2005, at 2:41 AM, Radioman390 at cs.com wrote:

> "J. Forster" <jfor at quik.com> wrote:
>
>> Hue Miller wrote:
>>
>>> Yes, but.....Scott Co. boasted of their "safe" receivers in numerous 
>>> magazine
>>> ads. I think they really believed it. I do NOT think this was some 
>>> kind of
>>> "disinformation campaign"
>>
> What, may I ask is all the brouhaha about "Tempest compliant" 
> receivers?
> There's actually a spec for the degree of attenuation of internal 
> signals at the antenna input.
> And this is still current!
> Also, look at the shielding in some Racal receivers like the 6775/6778 
> series. Each circuit board is mounted in a mu-metal case.
>
> Strangely the 6790 has a single bih "mother board", and the earlier 
> 6772 just had circuit boards mounted in slots. But there was a 6772E 
> which had the same shielding as the 6775/6778.
>
> What was all that about?
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