Microwave link.

[Radio Intelligence Agency]

Hi mates,

I have a few questions for those of you that knows how to get two or more sites linked thru microwave technologi.
We have a repeater located at a good site (50 meters tower and 34 meters obove sea level). We would like to get another repeater site to extend the range. We have another very good site (35-40 meters tower and aprox. 80 meters above sea level) and there should be "line of sight" between these sites I would estimate the distance to be aprox. 75-80 kilometers.
Both sites are located near by government communication sites so these locataion have been picked with strategic consideration.

Now my question is what kind of microwave link would do the job? I know of links that´s limited to 30-40 kilometers.
Thought was by time to get the working repeaters replaced with Quantars and of course with the ability to operate encrypted.

The repeaters have two different sets of frq (not that it´s important).

There might be more questions along the way but this is what we basicly need to be sure off right now and how it works in really.

Hoping to get some good info thanks.

V.

[Jim202]

Hi mates,

I have a few questions for those of you that knows how to get two or more sites linked thru microwave technologi.
and there should be "line of sight" between these sites I would estimate the distance to be aprox. 75-80 kilometers.
V. :wink:

You might want to go look at Western Digital and the spread spectrum microwave they have. It has much more capacity than what you need. The units will supply a full T1 or a double T1 channel capacity.

I would use the 2 Ghz. frequency range to get the distance your looking for. The antennas would be an open grid dish and you can use 1/2 or 7/8 coax for the feedline. It would be best to do a path study to get the numbers you need to figure the antenna size with the feedline loss and path loss.

If you do a search for spread spectrum microwave, you should find other brands available.

Problem you will also run into is that you will need a black box to break out the bandwidth from an ethernet voice over IP or a regular T1 to voice channels.

Don't expect to do this for just a couple of hundred dollars. Your looking at probably a $2500 minimum investment at each end of your path. That kind of depends on what type of antenna you use.

Jim

[Radio Intelligence Agency]

Okay Jim.

I´ve watched a couple of links on ebay. It seems it´s easy to get burned.
I´ll try to dig into the brand you mentioned.

I was hoping to find some used equipment to reduce the cost of investment. Always the money huh

I´d like to hear from anyone who has bought used links it could be surplus etc. There´s got to be plenty of ways beside ebay.


But Jim thanks for filling me in I might have some further questions.

[Jim202]

Be careful on just where and what you get. Those radios come in several band segments. They have to be paired in order to work. Like if one does TX high, the other on needs to be TX low so they match.

These microwave radios are on the air 100% of the time. They have dip switches to set up the modulation code. Both radios need to be set to the same code.

The more you dig into this type of radio, the more you will understand. I think the last time I was on the company site, they use to have some real good info there.

Jim

[dodge3500]

I have installed the Western Mux SS 6 GHz radios at my place of employment. Work beter than our licensed Harris raidos.