[Elecraft] K3: DSP Bandwidth Limit

[Joe Subich, W4TV]

On 2019-12-13 1:22 PM, Fred Jensen wrote:
 > Could you explain a little more?

What's to explain?  AM is a double sideband signal - equal width
either side of the carrier with each sideband carrying the same
audio information but inverted in frequency.

A 5 KHz *audio* bandwidth would be equivalent to a 10 Hz RF (IF)
bandwidth.  In fact, the K3/K3S processes DSP at both "IF" (right
after the analog to digital conversion) and again at "AF" (just
before the digital to analog conversion).  For AM, the IF bandwidth
is twice the AF bandwidth ... for SYNC AM, LSB, USB, CW, DATA the
IF bandwidth and AF bandwidth are essentially the same.

73,

    ... Joe, W4TV


On 2019-12-13 1:22 PM, Fred Jensen wrote:
> Could you explain a little more?
> 
> 73,
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
> On 12/13/2019 6:19 AM, Joe Subich, W4TV wrote:
>> Remember, the DSP display is audio.  5 KHz represents 10 Hz at
>> RF (IF).
>