said by kewlkeed :

My guess is 5.8Ghz aprox

said by kewlkeed :

I said 5.8 simply because we use dishes that look basically identical to those for 5.8.

said by TomS_ :

Assumptions are the mother of all you know whats.

said by kewlkeed :

Ouch, eating my words on that one for sure.

I use that assumption quote probably 3 times a day

said by balkme :

Those are definitely point to point microwave dishes. My guess is that it is a 1+1 Space Diversity configuration, probably 6 or 11Ghz. You would not be using waveguide for any high frequency links judging from the tower (waveguide loss would be too high vs. the output power of the typical 18/23 Ghz radios)

TomS - There are a few microwave vendors (Alcatel-Lucent) who have a FCC part 15 radio that do not use spread spectrum modulation techniques, thus reducing the likely hood of interference, although it can still occur.

From the MDR-8000 datasheet:
"As with all of the licensed versions of the MDR-8000, the unlicensed radios employ a narrowband single-carrier modulation technique with high-receiver selectivity. This technique provides dramatically superior properties as compared to most other unlicensed radios which are of the direct sequence spread spectrum type. Due to the poor peak to average power characteristics of spread spectrum modulation, transmitter power is significantly lower than that of the MDR-8000. That means the MDR-8000 can deliver more power to the receiver, which significantly helps to overcome interference. In practical terms, the MDR-8000 can operate with an antenna one size smaller than a spread spectrum radio on paths longer than 8 miles."

See »www.alcatel-lucent.com/wps/porta···n_NA.xml