[BC] The Future

[Robert Meuser]

Please check your medicine. I am and have been talking about AM radio. I 
can not fathom how or why to are hallucinating. Otherwise you must have 
had an early visit from doctor Jimmy.

R.


Dana Puopolo wrote:

>Uhm....NTSC TV IS AM!!
>
>-D
>
>------ Original Message ------
>Received: Sat, 02 Dec 2006 07:36:27 PM EST
>From: Robert Meuser <Robertm at broadcast.net>
>To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
>Subject: Re: [BC] The Future
>
>I agree and have done it with existing technology. My point, however, 
>was combining very tightly spaced AMs with different technology.
>
>R
>
>
>Dana Puopolo wrote:
>
>  
>
>>The cable industry has been using adjacent channels for decades with zero
>>trouble. They do it by monitoring and adjusting signal stregnths.
>>Co-located FM's can EASILY exist 400 kHz apart with ZERO problems.
>>It's the FCC that's the problem! In their "Alice in Wonderland" world, FM
>>radios haven't improved a bit in 50 years.
>>
>>-D
>>
>>
>>----- Original Message ------
>>Received: Sat, 02 Dec 2006 11:52:47 AM EST
>>From: "Mark Humphrey" <mark3xy at gmail.com>
>>To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
>>Subject: Re: [BC] The Future
>>
>>On 12/2/06, Robert Meuser <Robertm at broadcast.net> wrote:
>> 
>>
>>    
>>
>>>I think multiplex sites will work with much closer channel spacing
>>>thanks to totally different technology.
>>>   
>>>
>>>      
>>>
>>It's already practical to multiplex FM signals at less than 800 kHz
>>spacing by installing two master antenna systems, so that the closest
>>channels can be fed into different combiners, reducing loss while
>>increasing isolation.
>>
>>An example in Germany is the Berlin-Alexanderplatz "Fernsehturm",
>>where stations on 93.1 and 94.3 use the lower "UKW" antenna, with a
>>co-located 93.6 on the upper antenna:
>>
>>http://www.d-no.de/fs-turm.htm
>>
>>Of course, the "space combining" schemes for FM IBOC, using separate
>>antennas for analog and digital, work on the same principle.
>>
>>I manage a tower site in the western suburbs of Philadelphia where the
>>rent is based on the length, diameter, and number of transmission
>>lines, so everyone has an incentive to minimize tower loading.  Some
>>of my tenants who are running trunking systems have come up with some
>>clever combining schemes like this, so they can keep the number of
>>antennas as low as possible.
>>
>>Mark
>> 
>>
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