Node at the Transmitter site

George Seifert · Post by **George Seifert** » Thu Sep 13, 2007 10:00 pm

Was just curious if anyone is using a node at the transmitter site and also is anyone using a fiber link to your transmitter site?
We cannot get a clean STL shot and I need 3 audio streams, plus PSD, RDS and eventually HD2 so we are thinking fiber. We are also hoping to get Internet to the site as well as possible PBX phone extension from the studio PBX.
Skok has had some suggestions but was just curious if anyone is actually doing this?
G

cmac · Post by **cmac** » Fri Sep 14, 2007 6:44 am

Hey George,

We use a DragonWave AirPair 200 (18 Gig range at 12 miles). Works great with Axia nodes and can be setup to run multiple VLANS for office data, RDS, remote control, PAD and VOIP etc..I actually have an edge switch up at the site with two selector nodes plugged into it and have access to any audio source and GPIO functions on the Axia network at the studios.
If you have a short link you may be able to get away with the 24 gig unlicencsed version.

George Seifert · Post by **George Seifert** » Fri Sep 14, 2007 9:53 pm

I have heard great things about those products but we have no line of sight as some giant a$$ palm trees are in the way and they are not going to cut 'em down

.
I am considering such a shot for another 2 sites that I have. Do you experience much rain fade at that freq.?
G

dremund · Post by **dremund** » Tue Sep 18, 2007 3:59 am

Ditto the question about rain fade...

I am looking at a similar path using the AirPair but my past experience with rain fade has me scared...

dremund · Post by **dremund** » Sat Jan 19, 2008 5:12 am

I think it speaks volumes that no one wants to reply to the rain fade issue...

cmac · Post by **cmac** » Sat Jan 19, 2008 6:27 am

I have yet to experience any fade and we have had some heavy wet snow, thick fog lasting for days and heavy rain. The most fade I have seen is 9db. My rsl usually site aroung -44dbm at a range of 12 miles with a two foot dish at each end. I also use the high power version of the Dragonwave which gives me an additional 10db of gain.

dremund · Post by **dremund** » Sat Jan 19, 2008 11:21 pm

cmac wrote:I have yet to experience any fade and we have had some heavy wet snow, thick fog lasting for days and heavy rain. The most fade I have seen is 9db. My rsl usually site aroung -44dbm at a range of 12 miles with a two foot dish at each end. I also use the high power version of the Dragonwave which gives me an additional 10db of gain.

At 18 Gig? Wow.

I tried an 18 Gig shot some years ago, 2 miles with 2' dishes and it failed completly every time it rained, or at least so it seemed.

tyler · Post by **tyler** » Mon Jan 21, 2008 8:33 pm

I'm aware of two sites that use fiber, one is from their rack room up to an STL penthouse quite a distance away (I think it's several hundred meters). This one has an edge switch with an AES and analog node in the STL penthouse. Works great.

Another is a transmitter site where there are two transmitter buildings and they had fiber between them. They placed a node at each end with the appropriate media converters and created a snake. As far as I know it works like a charm.

What kind of distance do you have between the studio and tx site?

dremund · Post by **dremund** » Mon Jan 21, 2008 11:03 pm

I am looking at a six mile path, across a good sized river and a state line. fiber is out of the question in this case.

crussell · Post by **crussell** » Fri Feb 01, 2008 7:43 pm

dremund / tyler / George - I would be happy to have a look at the paths you are considering and make some equipment recommendaitons. Additionally, I can provide some information regarding rain fade and ways to incorporate redundancy into the design. Feel free to contact me via email at crussell@dragonwaveinc.com or 1-613-599-9991 x. 2282. Chris

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Node at the Transmitter site

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