If you have the NB on high setting, strong signals can cause the blanker
to distort the desired signal. Either turn he NB off or reduce the NB
level control. That may be what'c causing the problem.
Jim N4BE
sellington wrote:
>
> My FT-1000D seems to hear CW intermodulation products whenever
> a band is full of moderately strong signals. Yet the measured third-order
> intercept is normal (and very high). Also, inserting attenuation ahead
> of the receiver doesn't seem to help eliminate the intermod. Another
> receiver connected to the same antenna, cables, etc. is clean, so the
> problem is definitely within the FT-1000D itself. The problem is not
> cause by any extremely strong local signals. The FT-1000D is a later
> production unit, so it should already have the PIN diode modification.
>
> Has anyone else seen this kind of behavior? I'm at a loss to even find
> an explanation of how a receiver can have such a high third-order intecept,
> and still generate intermod products in the presence of only moderately
> strong signals.
>
> 73,
>
> Scott K9MA
> sellington@ssec.wisc.edu
>
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