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

[Tom]

In Canada we have the Basic, Basic with honors, and advanced. The advanced is like the US extra.




-------- Original message --------
From: Fred Smith <mfsj at totalhighspeed.com> 
Date: 06/11/2013  07:40  (GMT-05:00) 
To: 'Tom Blahovici' <tomb18 at videotron.ca>,don at w3fpr.com,elecraft at mailman.qth.net 
Subject: RE: [Elecraft] Question about filters in USB as shown on a P3 
 
No more Advanced licenses anymore, you're ready for the extra get the ARRL
study manual.....and good luck.


73,
Fred/N0AZZ
K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
P3/SVGA--KAT500--W2
Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G
300+w--(2) B-5016-G's 165w 2m



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Tom Blahovici
Sent: Tuesday, November 05, 2013 11:33 PM
To: don at w3fpr.com; elecraft at mailman.qth.net
Subject: Re: [Elecraft] Question about filters in USB as shown on a P3

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
>> 
> 

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