[Elecraft] Sherwood receiver test on KX3

[Matt Maguire]

Thanks Don. I was distracted by Matt Z's comments, and forgot to treat the original question :-)

73, Matt VK2ACL


On 15/08/2012, at 8:12 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> 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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