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

[Tom Blahovici]

Thanks Don…,
I guess the upcoming snowy months up here are a perfect time to study for my advanced license.  I’ve got to do something!
73’s

On Nov 5, 2013, at 11:05 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> 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
>> 
>