• Get involved.
    We want your input!
    Apply for Membership and join the conversations about everything related to broadcasting.

    After we receive your registration, a moderator will review it. After your registration is approved, you will be permitted to post.
    If you use a disposable or false email address, your registration will be rejected.

    After your membership is approved, please take a minute to tell us a little bit about yourself.
    https://www.radiodiscussions.com/forums/introduce-yourself.1088/

    Thanks in advance and have fun!
    RadioDiscussions Administrators

LAN - Looking for Specific Equipment

C

ChiefEngineer

I want my own ethernet from studio to transmitter so i can can some phone lines. Besides the Moseley box what else is out there that m ight be compatible with 900 antennas already in place?
 
On the cheap I'd say a Barix instreamer and extreamer 100. They offer a pro version which is the 1000 series. If you want something better consider th Comrex Bric. I think it can do many different algorythms including many the Barix doesn't have. Good luck!
 
Motorola makes some 900 mhz stuff, their canopy brand, maybe??? Anyhow the hard part that Moseley does nicely is diplexing the two to one antenna. You can't just use a 'T' on the coax. To use the Motorola stuff you would put in antennas at each end.
 
rrlane said:
Motorola makes some 900 mhz stuff, their canopy brand, maybe??? Anyhow the hard part that Moseley does nicely is diplexing the two to one antenna. You can't just use a 'T' on the coax. To use the Motorola stuff you would put in antennas at each end.
Click to expand...

Moseley is nice but pricey. Using the canopy stuff might work but I have been looking and they too are very proud of it. Thanks though.
 
we are using some tranzeo 900mhz radios on a link between 2 transmitter sites and it works great, even with a 1kw paging system on 929 on one end of the link. Uses the ism band, so 905-928. 5,10,20 MHz channel width.

model is tr-902. they have several units with and without integrated antenna. we got the unit without an antenna - only female N. Unit is designed to be mounted on tower but we just put it inside, only power option is the include PoE adapter.
 
have been looking for tranzeo used since reading about them.

They say this is useful for less than line of sight uses. How far is your path? We have a 12 mile hop, have an stl link currently. Want to send a second path and internet over our backup antennas.
 
4.5 miles, should to 20 miles or so with the right antenna. that might be pushing it on 900mhz with the 36dbm power limit. for longer distances, 5GHz works quite well with no power limit. 2.4Ghz should not even be an option, way too crowded.
 
Whatever RF link you use, be sure that the path calculations are done to minimize errors not to maximize bandwidth. Typically you want availability to be >/= 99.999%. Packet delivery should be at least 99% depending on whether your codec has error concealment.

Once you have calculated all the above and spec'd the RF link then look at the bandwidth available and your needs. You may or may not have the bandwidth to run all the audio you have, in which case you can look at using bit rate compression.

Consider the compression ratio and be extra careful as the ratio climbs above 6:1! Consider audio coding before or after the link as well. If there are already cascaded codecs be extra careful; in cases like this ADPCM algorithms such as enhanced APT-X have an advantage.

Bust of luck

Rolf Taylor
Applications/Support Engineer
APT, and Audemat Company
 
Status
This thread has been closed due to inactivity. You can create a new thread to discuss this topic.


Back
Top Bottom