Very nice Tom! On Thu, Jun 3, 2010 at 10:34 PM, Tom DeReggi <[email protected]> wrote: > > The specs of the New PowerBridgeM5 had been publisized, but not yet available > at distributors. For those like me that are impatience, we came up with the > next best thing. > The Home Brew Power Bridge! > > We found that the ArcWireless Gen2 enclosure matched with a Rocket makes a > great PTP link, similar to the New PowerBridgeM5. > > The ArCWireless 24db Dual pol panel w/ RSMA is available for about $135, and > has excellent specs, boasting almost 40db of isolation between pol connectors. > The Gen2 back enclosure is required in order to connect a mount to the > antenna, which adds about another $35, but its a really nice swivel mount, > and the enclosure adds some extra F/B isolation for the Rocket radio itself > (made of plastic). The Rocket MIMO is good to use, not only because the $90 > price tag, but because the Ubiquiti N radios lead the industry with up to > 27db of TX power in 5.x. Even in highest modulation, a full 22db is > possible. If we do the math, this will allow a 15" panel antenna to be used > to acheive the same TX power that alternative radio brnads may require a 2ft > dish to acheive. (Thus conserving space on poles, and improving cosmetic > appeal). > > We learned a Dremel w/ appropriate bit can cut the Gen2 case easilly. We > trace the Rocket shape along the bottom, and cut out a hole to match that > lets the Rocket slide right through snug. BUT, the Rocket's pole mount clips > are PERFECTLY SPACED, so that when it slides in the hole, the brackets keep > the rocket from sliding to far through. It allows the rocket to slide just > far enough so that the RSSI LEDs can be seen outside the Gen2 enclosure, and > Just enough so the ETH access panel can be removed for maintenance and > connection. All the RF connectors are safe and sound inside the enclosure out > of weather harm's way. > > The new V5.2 firmware really hums along nicely. I am quite impressed with > the quality and speed of this configuration. > > Click this link to see the pictures. > http://www.rapiddsl.net/arc-rocket-inside.jpg > http://www.rapiddsl.net/arc-rocket-outside.jpg > > Unfortuntately, I'm scare to death to use it for anything to critical, > because if noise is unexpectedly experienced on one of the two polarities, > I've been told that there is no way to disable one of the polarities, if one > develops interference. It can be tough finding 5.8 channels that are free on > both Pols. But uniquely, Ubiquiti does support MIMO on as low as 5Mhz > channel widths, and allows setting offset center frequencies, to have more > options to try to find channels that is interference free on both pols. > > In this case, I'm using the Rocket as the primary link to increase capacity. > Then I have a backup Trango Radio link. So if the PRimary has interference > that cant be resolved, I can switch to the backup, until I have time to make > the truck roll to the cell site to physically disconnect or swap one of the > Internal cables/ polarities. (I dont trust the automatic self disable) But > for me, it was a good way to get some temp speed, until I can afford the > upgrade to licensed. Its a 15mile link. > > > Quick note, we also had done some more MIkrotik MIMO testing. We like the > newer MIkrotik N card, that is HP. Its the one with MMCX connectors. It also > has a nice metal Shield around the RF circuitry. It adds a lot more TX power. > Its still about 3db less power than the Ubiquiti N radios, but its a step up > from the original MIktoik card that was 5 db or so less. I'm mentioning this > because whe nwe retested with the newer model HP mikrotikcard, we did infact > get cleaner radio links. Not tons better, but we did pickup about 3mbps of > capacity, comparatively to the older MT card. We also picked up a tad bit > better TCP throughput through the radio link laptop to laptop. I think it was > because the RF had less packet loss/self noise, because the better made > shielded card. We have not been able to get the MT to pass as much capacity > as the Ubiquiti yet, but we are still working on it. > > > > > Tom DeReggi > RapidDSL & Wireless, Inc > 301-515-7774 > IntAirNet - Fixed Wireless Broadband > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ >
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