[MPlayer-dev-eng] Re: frequency range check and keeping old volume for radio support

[Vladimir Voroshilov]

Hi, RC

2006/11/7, RC <rcooley at spamcop.net>:
> > First is ability to check frequency range to disallow setting ivalid
> > values for frequency parameter.
> 
> > +#define FREQ_MIN 87.50
> > +#define FREQ_MAX 108.00
> 
> Is this a limitation of TV cards with radio support?  
> If not, I can certainly see many uses of going above and below the
> standard FM radio frequencies.
Can you give me some examples of it?
I don't know does TV card have such limitation or not.

Quotes from "FCC ONLINE TABLE OF FREQUENCY ALLOCATIONS" "47 C.F.R. § 2.106", Page 19
(http://www.fcc.gov/oet/spectrum/table/fcctable.pdf):

Region 1 Table: 87.5-100 BROADCASTING (Broadcast Radio (FM)) 
Region 1 Table: 100-108 BROADCASTING (Broadcast Radio (FM))

Region 2 Table: 76-88 BROADCASTING,Fixed,Mobile (Broadcast Radio (TV)) 
Region 2 Table: 88-100 BROADCASTING (Broadcast Radio (FM))
Region 2 Table: 100-108 BROADCASTING (Broadcast Radio (FM))

Region 3 Table: 87-100 FIXED,MOBILE,BROADCASTING (Broadcast Radio (FM))
Region 3 Table: 100-108 BROADCASTING (Broadcast Radio (FM))

USA Table: 76-88: BROADCASTING (Broadcast Radio (TV))
USA Table: 88-108: BROADCASTING (Broadcast Radio (FM))

All Tables: 108-117.975: AERONAUTICAL RADIONAVIGATION

Thus, i think, FREQ_MIN can be decreased to 87.0
FREQ_MAX doesn't need to be change

Opinions?

--
Regards,
Vladimir Voroshilov     mailto:voroshil at gmail.com
JID: voroshil at jabber.ru
ICQ: 95587719