Re: In band rx IMD

Posted by Geoffrey Mackenzie-Kennedy on Jan 14, 2010; 9:55am
URL: http://elecraft.85.s1.nabble.com/In-band-rx-IMD-tp4374684p4391641.html

Randy,

It sounds as though this "fellow" is talking about the *In Passband* IMD
performance of a receiver, usually expressed in terms of 3rd Order Dynamic
Range when BOTH test signals are inside the receiver's passband. This
information can provide, for example, a useful indication of how a receiver
will cope in a "No Split" pile-up situation with non-stop callers inside the
passband.

The ARRL does not publish this information in their regular reviews, but
have in their expanded test results for some receivers  - the K2 being one
example.

73,
Geoff
GM4ESD


Randy Downs wrote on Wednesday, January 13, 2010 at 9:25 PM:



> I'm a bit confused about an email I received. A fellow said "The
> TS870S is probably still in your shack because of its INBAND IMD
> performance. The ARRL does not do the inband IMD test anymore. Many of
> the complaints about the K3's receiver is related to its poor inband
> IMD performance. However there is various opinions on this."
> What is he referring too? I'm not aware of this issue.Randy
> K8RDD


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