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I am researching the requirements of addding a second transmitter. I am going to try to sync it with the first. I am looking at wireless Audio in the 2.4 ghz range and up equipment.
I can do internet with barix, but I dont’ want to deal with the constant time fluctuations due to latency inconsistencies (I haven’t ruled it out completely).
I would rather send the signal analogue up to two miles using wireless technology…
This would also do a way with monthly costs after the setup, and be real close to real time thus syncing the programming will be fairly easy.
This may turn into a multi-broadcast transmitter project, which is in my opinion another reason why I should use wireless analogue…
Any thoughts?
Total posts : 45366I’ve used 5ghz Nyruis video senders as STLs before, works well. They have complete STL systems for the 5ghz band that should achieve the range you want while still not needing a license. I think they are digital though, I’m not sure.
Total posts : 45366I am ok with digital, just want to stay away from network/internet because of latency variations. Thanks for the suggestion!!!
Total posts : 45366This may be a way for me to have two AM transmitters going at the same time. If I get a Spitfire because it is better than the Talking House as far as Audio I could run it at the main location and then try and save for another one and have it run at The Table Restaurant. If the Nyrus AV senders go a mile I’d be good to get to The Table. Then from The Table the Deltaville Market is about 1/4 mile from there. So then I’d cover the range I want on AM and be legal since I’m starting a good relationship with the folks at The Table. Now you got me thinking.
Total posts : 45366You could create your own INTRAnet – private internet that won’t have the same latency issues of the regular internet. It would use standard wireless equipment that is inexpensive.
The antennas are the key for any kind of range. Anything 2.4 GHz & above will need line of sight, highly directional. There are some boxes that will do 900 MHz that aren’t as dependent on line of sight.
Total posts : 45366Isn’t 900 Mhz more limited in Range? I know that height helps and there was an article on TechTV about a cantenna for those devices that have a standard connector so you could make the directional antennas as it suggests. Again this was Years Ago.
Total posts : 45366900 MHz should give you better range, particularly when you don’t have full line of sight.
There are also boxes that use proprietary technology – Trango is one. They can be picked up used on e bay relatively cheaply.
Total posts : 45366This may be a way for me to have two AM transmitters going at the same time. …
Just to note that even when two or more physically close transmit systems in the AM broadcast band use exactly the same carrier frequency (synchronously locked/phased to each other), identical program audio at all transmitters that is perfectly synchronized in modulation time/phase/amplitude, with all such transmit systems radiating the same groundwave fields in all directions — such systems STILL can interfere with each other.
The reason for this is related to the r-f field resulting from each transmit system as it arrives at a given receive location, which changes the relative conditions present there from those when each signal left each transmitter.
In some directions/locations, those changed fields tend to reinforce each other. In other directions/locations they tend to cancel each other.
The closer together those systems are located, physically, the greater the interference potential between/among them.
Total posts : 45366So let’s say the 1st transmitter fades at 1 mile I’d have to find a location 1 1/4 mile away from the fade out right?
Total posts : 45366The physical spacing needed for synchronous AM systems is best determined by experiment/results.
Total posts : 45366Experiment! I’d love to see you do this Legacy! I love this idea…
Doug
Total posts : 45366To Clarify, I’ve used Nyrius AV Senders; not that Nyruis makes a system that will do exactly what craig is wanting. The Video Senders are analog FWIW and work well. Any digital STL will have some latency, usually only a split second or up to 7 seconds.
There is a separate comapny that sells a complete link package complete with dishes for a 5ghz hop that reports range of 5 up to miles.
Total posts : 45366That’s going to be one helluva bit of experimenting. I wish you all kinds of luck and success, but unless you have a large chunk of copper connecting your two facilities, synching up two transmitters and two time-stable audio paths on the same frequency — with hobby gear — is going to be dicey.
When Annandale Terrace lurked here a few years ago, they made a good simple suggestion: use two crosstown transmitters on two different frequencies and dont worry about synching. Instead, promote your station(s) as “owning” the entire AM dial. Something like: “East Side 1400, West Side 1600! No matter where you live, there we are! (Your Calls)” It’s a fun boast with all kinds of promotional and imaging possibilities, and makes you memorable.
When commercial stations do LMA’s with each other and the same program content is on both sticks (but time-delayed for one reason or another), listeners don’t seems to mind and they can figure it out. I want to see what you come up with, but if it were my rig, I’d prefer two strong stable signals over one phasey slap-echoey one.
Total posts : 45366ATR posted back in April 2014:
http://www.part15.us/comment/31714#comment-31714
http://www.part15.us/comment/31718#comment-31718
My memory wasn’t bad. Except for a couple of details, I remembered these postings pretty well.
Total posts : 45366I am hoping to try synchonized first. If not, I will change modules and go to separate frequencies.
My goal is to go with analogue audio over wireless, thus being nearly identical to wired, with predictable/constant latency (there is always a delay with distance).
Our internet service in the area is unpredictable, and our main provider will argue with you about its availability at your local address, when the address next door already has it installed. I haven’t ruled out using it with a barix system, and I do intend to experiment with it on another project.
If I get lucky and get things phased properly using wireless analogue , its a go… if not, it will be easy to change frequencies on the remote site and move forward with separate promos for the area.
I am using a hamilton rangemaster currently and will acquire another one as the project continues. They tout the ability to be synced.
I will have to see if I can actually get one of the remote sites I have available to be visible to the main location via wireless and go from there.
This should prove to be a challenge.
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