[amsat-bb] Modulation levels on AO-85

[Joe]

Plus a LOT of people are running Narrow Modulation now.
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
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On 8/13/2017 6:14 PM, Jerry Buxton wrote:
> 5 kHz is the nominal "wide" setting for ham radio equipment on the
> VHF/UHF bands.  So a rig set to 5 kHz is what we all usually expect.
> 5 kHz deviation with 3 kHz audio (the usual top for most voice) would be
> about 16 kHz bandwidth.  The deviation number alone is not equal to
> bandwidth.  ("Carson's Rule")
> Low audio is usually just that, not talking loud enough, not talking
> into the mic properly, mic gain setting too low, food in the mic hole, etc.
>
> Jerry Buxton, NØJY
>
> On 8/13/2017 17:55, Ronald G. Parsons wrote:
>> I’ve noticed lately that many stations on AO-85 have barely audible modulation. Yet other stations have clear audio with good quieting. I have heard the some manufacturers of hand-held and mobile rigs are setting their maximum deviation to 5 kHz or even less. I have noticed the same effect on local repeaters. Has anyone done any tests of the deviation required for reasonable quieting on AO-85? Or are more stations using lower power than in the past?
>>
>> Ron W5RKN
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> _______________________________________________
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> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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