Expand on what hardware you are using. Radios, antennas, tower heights both AGL and AMSL on both sides and frequencies. Also GPS coordinates if you have them. A 52km link is something that takes some preplanning and I'm not sure your issue isn't LOS, fresnel, etc.
Ok thks for the reply, here's the info you are asking, I am being very specific; maybe this info could help others in the future:
* Antennas: General Dynamics (Gabriel) model HQFD4-52, 5.25 Dual Pol. QuickFire 4', 34.3-34.9 dBi, 5.25 - 5.85 GHz, FtB ratio 52.
* Wireless cards: Ubiquiti XR5
* Mobo's: Routerboard 532A
* OS: RouterOS running WDS w/nstreme all dynamic and default. Bench tested.
* Surge suppressors: Hyperlink 0-6Ghz
* Pigtails from the card to suppressor: 9" MMCX to N
* Pigtails from the surge suppressor to antennas: wisp-router 6ft N on both sides.
* Enclosure Pacific Wireless Die Cast Aluminum
* Power supplies Pacific Wireless 48Vdc PoE
* Site A: 27°32'11.03"N , 99°28'18.30"W , Elevation = 494 ft , Antenna 100 ft AGL
* Site B: 27°23'50.30"N , 98°58'52.22"W , Elevation = 880 ft , Antenna 250 ft AGL
* Total Distance 31.68 miles (50.82 Km)
* Antenna Tilt Calculator Results:
Height of antenna A (AGL) : 30.480 meters (100.000 feet)
Ground elevation at A (AMSL) : 150.571 meters (494.000 feet)
Antenna A total elevation : 181.051 meters (594.000 feet)
Height of antenna B (AGL) : 76.200 meters (250.000 feet)
Ground elevation at A (AMSL) : 268.224 meters (880.000 feet)
Antenna B total elevation : 344.424 meters (1130.000 feet)
K factor : 1.330
Total path distance : 50.820 kilometers (31.578 miles)
Antenna A to B tilt : -0.002 degrees (-0.000 radians) (downward tilt)
Antenna B to A tilt : -0.371 degrees (-0.006 radians) (downward tilt)
* Wireless Network Link Analysis Results:
Transmitter frequency : 5800.000 MHz (5.800 GHz)
Wavelength : 5.169 centimeters (2.035 inches)
Transmitter RF power output : 28.000 dBm (630.957 milliwatts)
Transmit cable type : Times Microwave LMR-400
Transmit cable length : 1.829 feet (6.000 meters)
Total transmit cable loss : 0.649 dB (0.108 dB/foot 0.355 dB/meter)
Transmit antenna gain : 34.5 dBi
RF input power to the antenna : 27.351 dBm (543.375 milliwatts)
Receive cable type : Times Microwave LMR-400
Receive cable length : 1.829 feet (6.000 meters)
Total receive cable loss : 0.649 dB (0.108 dB/foot 0.355 dB/meter)
Receive antenna gain : 34.5 dBi
Received power level : -46.138 dBm (1103.048 µV)
Receiver's threshold : -74.000 dBm (44.615 µV)
Fade margin : 27.862 dB Very good link.
Probability of outage : 0.1 %
Total free space path loss : 141.839253085546 dBi over a path length of 50.820 kilometers (31.578 miles)
Peak transmitted EIRP : 61.851 dBm (1531341.409 mW)
* According to Motorola's Link Estimator it shows fresnel and LoS are OK
Calculations : were obtained from : http://www.electro-comm.com/rfcalculations.html
Motorola Link estimator: Google for it.
Antennas specs: http://www.tessco.com/products/displayP ... ventPage=4
Google earth image of the link:
Hope this info help others and hopefully somebody can help us aiming these babies ...