My understanding is that in AM, the BW shown is supposed to be the actual
recovered audio bandwidth, not the total bandwidth. There is no reason why
it should be restricted to any less than 12 kHz since the DSP IF is 14 kHz
wide, and the roofing filter over it is 20 kHz.
Ron
N6AHA
----- Original Message -----
From: "joel hallas" <jrhallas@optonline.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, March 16, 2006 9:59 AM
Subject: Re: [TenTec] Orion Sub Receiver BW
> Am I missing something here?
>
> If a DSB AM signal is tuned with the carrier centered in a 6 kHz BW,
> I would expect to see just 3 kHz of audio BW. If you tune the carrier to
> one edge, you will be able to get a wider audio BW.
>
> 73, Joel
>
> Sinisa Hristov wrote:
>
>>Rick Williams wrote:
>>
>>
>>
>>>When I tuned in a local AM station and looked at the audio on HamAlyzer
>>>it
>>>looked great EXCEPT for one thing. It was only 3000 Hz wide? The audio
>>>signal plummeted after 3,000 Hz!
>>>
>>>
>>
>>
>>I attempted to measure AM RX audio response with 2.056 a few times,
>>and in all ocassions it was 3 kHz on both main and sub RX.
>>RX filters were fully open and RX was fed from a signal generator
>>having adjustable modulation frequnecy.
>>
>>Audio response was close to 6 kHz with 1.373b5.
>>
>>
>>73,
>>
>>Sinisa YT1NT, VE3EA
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>>
>>
>>
>
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>
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