X-Sponsor: W4AN, KM3T, N5KO & AD1C
I think the parameter to be measured is called TIM (Transient
Intermodulation Distortion) and surely it has an accepted method to be
evaluated as well as the IMD or THD have.
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> To : firstname.lastname@example.org
> Cc :
> Date : Wed, 07 Mar 2001 07:51:36 -0500
> Subject : Re: [CQ-Contest] Clicks
> At 05:14 PM 3/6/01 -0500, Bill Fisher W4AN wrote:
> ...I have noticed what I'll call key clicks are getting worse and
> >on the bands. Normally, this phenomina can be observed when
> >VERY strong. The same signal that produces clicks at 40 over S9,
> >appear "clean" at S9.
> Reading this statement made me uncomfortable at the start. If
> attenuator makes the clicks go away, then I would wonder whether they
> being produced in the receiver. I know that my TS-930, which has a
> reputation for handling overload well, behaves exactly this way on
> signals. Others, however, still produce off-frequency clicks and
> even when reduced to under S9.
> I'm afraid that receiver-based tests are never going to persuade
> manufacturers to clean up their act. Why can't we contesters
> ARRL to add an appropriately designed test or tests to their
> reviews? It would be even better (but maybe utopian?) if they could
> persuaded to run a comparison of the top half-dozen contest radios for
> transient off-channel garbage on both CW and SSB. W8JI's already
> how this could be done from a technical standpoint, and the ARRL has
> open to changing its test procedures in the past when presented with
> How about it, HQ? Anyone reading the mail?
> 73, Pete N4ZR
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