SV: [AMPS] Receiver performance

[i4jmy@iol.it]

The intercept point itself is not very significative in receivers and 
other sensitive low level RF instrumentation like spectrum analyzers.
What count's is the resultant between dynamic range and noise figure.
Often, a too good noise figure has a negative impact on the dynamic 
range and intercept point while an optimal IP could shift the dynamic 
range out of the useful range leading to a bad ground floor noise.
Unfortunately, optimal NF and intercept point requirements vary along 
the HF range, used antennas and along the 11 years sun cycle.
An attenuator, might be not always the best solution.


73,
Mauri I4JMY



> ---------- Initial message -----------
> 
> From    : owner-amps@contesting.com
> To      : lomax1@prodigy.net, amps@contesting.com
> Cc      : lomax1@prodigy.net
> Date    : Thu, 16 Mar 2000 22:00:57 +0000
> Subject : SV: [AMPS] Receiver performance
> 
> 
> I may be wrong: but any receiver, even the poorest, can have a 
fantastic
> intercept point if you put enough attenuation at the input? So, I 
guess, and
> I only guess now, that the intercept point is only interesting if you 
at the
> same time tell what sensitivity you have? In other words: the lower 
end of
> your dynamic range?
> 
> Hej daa and..............sooner 
> de Hans SM5kI
> 
> 




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