I need some good advice. I am an RF Engineer, so sensible replies only please. I have been using Lobometrics 912N and Lobo 912 at 5.8G over a 1.5KM LOS link. When 1st installed signal levels at one end were -66 and the other -82 withh 20Mhz bandwidth. Eventually the signal decayed reported by the 912N to the point it was -91 and unreliable. I reduced the Bandwidth to 5Mhz and the circuit stabilised at -66 radio 1 and -88 radio 2.
Since then I have tried 2 further Lobo 912N's. Each with the same result.
After zero help from their supplier I now have switched to making my own and use a MT133 board with R52H card.
I replaced both ends, at first the signal levels were -46 radio 1 then -66 radio 2. After 2 days -46 and -66, after 3 days -46 and -82. If I turn up the bandwidth to 20Mhz then the signal drops to -88 and is too near the threshold of the unit.
Ping times are erratic.
The antennas were 22dB panels both ends, then 24dBi dishes both ends, then finally 22dB panel and 24dB dish.
Coaxials are about 1m long and have been changed both ends 4 times.
The radio that reports back that the signal is -83 (right now) is 1 of a dual radio. Ie this unit has 2 radio cards fitted. (the second lan points 90 degrees in other direction)
The antennas were spaced 2m apart, now 1.5m apart.
Strangely just before I ripped out the Lobometrics, I somehow managed to get the signal level reported by this radio to a sensibel lvel (-66) by changing channels and then changing back again. However if the radio was ever re-booted or any changes made which involved the radio card resetting, then the unit would go back to -66.
The datarates are set as configured (all except 54). Basic rates all unchecked except 1st rate in each row)
Radio card power set to default.