[BC] STL link...

[Robert Meuser]

That was not the question.  The original post spoke to an Internet connection. 
You are correct regarding the risks but the original poster was resigned to 
assume those risks.

R

Burt I. Weiner wrote:
> For a STL I like to be in charge of my own destiny.  I've seen to many 
> instances where the best of internet links has had it's problems with 
> throughput.  When it goes down I can not do much more than reboot, 
> scream, reboot, yell, reboot and cry.  With a properly engineered, 
> coordinated and maintained RF STL that is in a licensed band I am more 
> secure.  I feel that with the present State of The Art with regards to 
> 24-7 reliability of the internet and its backbone I would not want that 
> for a main STL.  Maybe backup.
> 
> I have seen some very successful WiFi links and I have seen some very 
> bad ones.  It all depends on who and what else is on the band with you.  
> The frequencies used for WiFi are typically loaded with other devices 
> and that situation will not get any better.  In major cities this can be 
> a serious problem.   Spread Spectrum is not immune from interference.
> 
> On long paths a big dish can be both a good thing and a bad thing.  Good 
> for higher gain but bad from the standpoint that higher gain equals 
> narrower beamwidth which raises the chances for de-coupling between the 
> dishes.  For best reliability it's best to use a lower gain (fatter 
> beam) at the transmit end and higher gain (larger aperture) at the 
> receive end.
> 
> Burt
> 
> At 06:27 PM 2/18/2006, you wrote:
> 
>> From: Robert Meuser <Robertm at broadcast.net>
>> Subject: Re: [BC] IP STL
>> To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
>> Message-ID: <43F7A584.8030306 at broadcast.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> I have had good experiences with the audio TX communicator. $700 per end
>> for software that will run on a pretty modest computer, like a 600 mhz
>> pentium. I has the ability to operate with linear as well as mpeg audio.
>> The software adjusts its buffering automatically based on network
>> condition and can also function via ISDN.
>>
>> We even ran it off a laptop in the middle of Manhattan via plain vanella
>> WIFI and it worked quite well.
>>
>> If you could get DSL lines with enough uplink speed, you could run
>> linear audio and the network traffic would not likely be an issue if
>> both DSL were from the same telco provider.
>>
>> You can get a free slightly crippled demo version here:
>>
>> http://www.musicamusa.com/
>>
>>
>> Good Luck
>>
>>
>>
>> Bill Spry wrote:
>>
>> > Thanks to everyone for their input on our STL need.  It seems like a
>> > very expensive venture to mount 8 ft. dishes on each tower in order to
>> > make it 28 miles.  Not to mention the cost of the equipment (even
>> > though I am a distributor for Nicom).
>> >
>> > As an alternative, we are looking at IP equipment.  I checked out the
>> > Comrex Access.  Does anyone have experience with them.  It's hard to
>> > believe that you can achieve full quality at such a low bitrate.  But
>> > because the bitrate is so low, I doubt there would be any 'hic-cuping'
>> > on the audio due to bandwidth problems.  Plus the delay is only 1/4 of
>> > a second.  Nice.
>> >
>> > I would love to hear more from anyone that has used or experimented
>> > with the Comrex Access or any other IP STL hardware.
>> >
>> >
>> > Thanks again,
>> >
>> > William J. Spry
> 
> 
> Burt I. Weiner Associates
> Broadcast Technical Services
> Glendale, California  U.S.A.
> biwa at earthlink.net
> K6OQK
> 
> 
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