[ICOM] R7000 dumb question of the day

[gfiber at comcast.net]

Ron,

It was not a stupid error, you just did not know the signal bandwidth was any different. I used to get that question many times while I worked at Icom.

I always thought the NOAA modulation was narrow band FM. ON an AM receiver you can detect FM, its called slope detection but I seem to remember you needed to be able to tune a bit off the center frequency to accomplish slope detection. You might be doing that with the 756Pro and the 10.7 IF out of the 
R-7000. The 10.7 MHz IF is like 6 MHz wide as I remember.

Gary K8IZ

-------------- Original message -------------- 

> In a message dated 12/2/2005 4:34:45 PM Eastern Standard Time, 
> gfiber at comcast.net writes: 
> Ron, 
> 
> The FM filter is about 15 kHz wide and the FMn filter is about 3 kHz wide. 
> Standard FM broadcast is 150 kHz wide and up to 200 kHz with the other data 
> and guard band included. 
> 
> The problem is the Standard broadcast signal is way to wide for the FM 
> filters in the 756 series. The FM filters in the 756 are for two way 
> communications, where the wide broadcast FM signal is for fidelity. 
> 
> Hope that helps 
> 
> Gary K8IZ. 
> > Any thoughts as to why the FM is FUBAR??? 
> > thanks for your patience! 
> > ron 
> > N4UE 
> > ---- 
> > Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net 
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz 
> > Icom FAQ: http://www.qsl.net/icom/ 
> ---- 
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net 
> Icom Users Net: Sundays, 1700Z, 14.316 MHz 
> Icom FAQ: _http://www.qsl.net/icom/_ (http://www.qsl.net/icom/) 
> 
> 
> Gary, THANKS!!! Another member pointed out my stupid error.... 
> 
> By the way, what type of modulation does NOAA use????? Like I said, it 
> sounds good on several radios, regardless of the radio's mode setting...... 
> 
> 
> ron 
> 
> N4UE 
> ---- 
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net 
> Icom Users Net: Sundays, 1700Z, 14.316 MHz 
> Icom FAQ: http://www.qsl.net/icom/