[Elecraft] Question about filters in USB as shown on a P3

[Don Wilhelm]

Tom,

The P3 is showing you the IF bandwidth of the signal before any 
filtering, but the K3 or KX3 is indicating the audio bandwidth (after 
filtering and demodulation.

With AM, the IF bandwidth is double the AF bandwidth.  A bit of study 
into AM modulation may be helpful.

73,
Don W3FPR

On 11/5/2013 10:37 PM, Tom wrote:
> Just when I thought I had it all together I had this observation:
> For am, the bandwidth as shown on the k3 or kx3 says 3 with a shift of 1.5.
> However when you look at the p3 the band is clearly centered on the carrier but the band you see is 6khz wide. Shouldn't the bandwidth be shown as 6khz with a center frequency of 0??
> Does anyone. Have a an explanation?
> 73s Tom
>