Just wanted to share our results for a link we finished field testing up here in Canada.

Distance: 8.1 km (5 mi) in urban environment

Site A: RB411AH w/ ROS 4.16, R52Hn, MMCX-SMA pigtails x 2, ARC Wireless 23 dBi dual-pol integrated panel w/ integrated enclosure, ~250' AGL (building mount)

Site B: RB411AH w/ ROS 4.16, R52Hn, MMCX-N(m) pigtails x 2, LSXL inline surge suppressors x 2, ARC hinged enclosure, 4' LMR400 N(m)-N(m) jumpers, 4' General Dynamics Quickfire 34 dBi dual-pol dish, ~70' AGL (building mount)

Wireless configs:
0 R name="R52Hn-1" mtu=1500 arp=enabled
interface-type=Atheros 11N mode=bridge
frequency=5270 band=5ghz-onlyn channel-width=20mhz
scan-list=5100-5900 wireless-protocol=nv2 wds-mode=dynamic
wds-default-bridge=bridge1 wds-ignore-ssid=no
default-authentication=yes default-forwarding=yes
default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=default compression=no

0 R name="R52Hn-1" mtu=1500 arp=enabled
interface-type=Atheros 11N mode=station-wds
frequency=5180 band=5ghz-a/n channel-width=20mhz
scan-list=5100-5400,5700-5900 wireless-protocol=nv2-nstreme
wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
default-authentication=yes default-forwarding=no default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=no security-profile=default
compression=no

RF Stats (while running bw tests):
TX/RX Signal: -49/-50
Chain 0: -52/-52
Chain 1: -53/-54
SNR: 58 dB
CCQ: 98/99
TX/RX Rate: 130 Mbps/130 Mbps

RouterBoard bw test results (~ 5 min tests):
Rx: Avg 96 Mbps, Max 111 Mbps
Tx: Avg 110 Mbps, Max 113 Mbps
Both: Avg 54/51 Mbps, Max 58/55 Mbps

We got laptop to laptop full-duplex results of 46Mbps/46Mbps using nuttcp with no packet loss on the test or on 1400 byte pings running concurrently, AND no call quality loss on a Skype voice call over the link.

We're pretty happy with these results. We tried some tests using the extension channel both above and below control, but didn't see any better results. We assume this is due to interference. Does anyone know where the extension channels are located in reference to the main channel?

maybe the cpu use is near 100%? check it during BW