The only advantage is to free up more frequencies, that's it. If you're on 
ham frequencies they're about all wide and there would be no benefit to you 
at all to try to go narrow other than you wouldn't sound all that great to 
those with wide receivers depending on the radio. Ham equipment is only 
narrow transmit anyway if you set it that way, they still receive wide. I 
think they only reason ham equipment goes narrow in the first place is for 
those who want to take it to the MARS frequencies and maybe future 
compatibility but right now, there's no reason to ever use it unless you are 
in MARS or have a reason to use it on land mobile channels outside the ham 
bands where narrow is required.
----- Original Message ----- 
From: "Richard B McDonald" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, April 26, 2015 11:27 AM
Subject: Re: What is "FM Width"?


> Hi Howard #3!
>
> Thanks!  So, by narrowing the band it makes it more "efficient."  Hhhmmm . 
> .
> . so, does this mean better/longer/clearer RX and TX?  Why or in what
> circumstances would someone use wide versus narrow?
>
> 73,
> Richard KK6MRH
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Howard, W A 9 Y B W
> Sent: Saturday, April 25, 2015 11:01 AM
> To: [log in to unmask]
> Subject: Re: What is "FM Width"?
>
> As I assume you know, FM stands for Frequency Modulation.  The standard 
> for
> many years was a deviation of 5 KHz meaning when you modulate an FM 
> carrier,
> it changes in frequency up to plus and minus 2.5 KHz.  Narrow FM 
> modulation
> is a lesser deviation, 2.5 KHz and 2 KHz.  The reason for a narrow 
> deviation
> is to allow a more efficient use of the radio spectrum.  We are talking
> about two way radio communications above and as a side note, Broadcast FM
> has a deviation of plus or minus 75 KHz. As the deviation widens, the
> fidelity of the transmitted audio increases.  This is why the deviation of
> FM broadcasts have such a wide deviation.
>
> Howard #3
>
> ----- Original Message -----
> From: "Richard B McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, April 25, 2015 10:26 AM
> Subject: What is "FM Width"?
>
>
>> Hi!
>>
>>
>>
>> So, I am aware that the "width" of an FM signal can be set to "wide" or
>> "narrow", but what does that mean?  Under what circumstances would you 
>> use
>> one or the other.
>>
>>
>>
>> 73,
>>
>> Richard KK6MRH
>
>
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