[Elecraft] Sherwood receiver test on KX3

[Don Wilhelm]

Let me try to help a bit.
On the roofing filter/8 kHz shift, you have the cart before the horse.  
The 8 kHz shift requires that the roofing filter be bypassed.  There are 
other cases where the roofing filter may be bypassed without the 8 kHz 
shift.  For instance Dual Watch being active.

There is no IF associated with the IQ outputs, it is "bassband" which 
means it is the same thing as the "0 Hz" that you are referring to.

Actually "baseband" is a better term than "0 Hz" - technically 0 Hz is a 
DC signal with no variation.  Baseband can and does contain modulation.

73,
Don W3FPR

On 8/14/2012 4:47 PM, webrehm wrote:
> It is my understanding that when the roofing filter is used, which is a low
> pass filter, that the IF is 0 Hz.
> When the roofing filter is bypassed (FIL1) does this mean that the IF is
> shifted up to 8 KHz?
> What is the IF of the IQ outputs?
> Can someone explain this to me because I am confused.
>
> tks
>
> Dennis
>
>
>
>
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