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|reply to DrStrangLov |
Re: AyrMesh Hub: Distance
Just to be clear, 1/2 mile range is maximum with perfect line-of-sight (i.e. 80% free Fresnel Zone for the RF-inclined) to a laptop or similar device.
The maximum range from Hub to Hub is about 2 miles, again, with perfect line-of-sight. The reason for the difference is because, in microwave data links, it "takes two to tango," and antennas matter more than power.
The Hub puts out about a Watt of power to a 6 dB antenna. A typical laptop puts out about 0.06 Watts of power to a 0-2 dB antenna. So the laptop has much shorter range to the Hub than another Hub will, but it still benefits from the high-gain antenna on the Hub.
And WHT, yes, you really can make them work at these distances. The Hubs are built by Ubiquiti, but we're NOT running Ubiquiti firmware on them and they are tweaked to deliver longer distances (with lower bandwidth) than, say, a Ubiquiti PicoStation. If you have questions, please feel free to get in touch with me personally. We kinda ran into the opposite of "aspirational advertising" - I had wanted to say they'd go 500 yards to a laptop or 1 mile between Hubs, which I thought was still somewhat unbelievable. The truth, however, is that we're still understating the performance a little - one of our beta testers has a link over 2 miles (between a 60' tower and a 60' grain leg, over nothing but corn).
Note that the goal of this system is to create a very large wireless LAN. It's NOT a point-to-point system - we suggest Ubiquiti NanoBridge M5 or AirGrid M5 devices for point-to-point links. They're a little hard to set up (the first few times you do it), but they work great. That's what I would use for a 5 mile "shot."
I hope that clears up any misconceptions about the AyrMesh system, but I will note that this probably belongs in the "Home Networking" area, not in the "WISP forum." Please feel free to contact us with any questions.
-Bill Moffitt, Ayrstone
said by Ayrstone :
And WHT, yes, you really can make them work at these distances. The Hubs are built by Ubiquiti, but we're NOT running Ubiquiti firmware on them and they are tweaked to deliver longer distances (with lower bandwidth) than, say, a Ubiquiti PicoStation.
Wait... so if the radio breaks how do I RMA it? Loading other software voids the Ubiquiti warranty.
|reply to Ayrstone | said by Ayrstone :
The truth, however, is that we're still understating the performance a little - one of our beta testers has a link over 2 miles (between a 60' tower and a 60' grain leg, over nothing but corn).
Let me help you with trying to understand the performance.
There are times you can certainly get that kind of coverage from an elevated location over clear ground.
Let me offer some much better examples.
said by WHT :
From history, it is well known that a street level laptop or smartphone can use the AP up to 500 feet to 1,500 feet.
It will very likely work up to 500 feet.
It might work past 500 feet, or it might not.
It might work up to 1,500 feet, or it might not.
It will very unlikely work past 1,500 feet.
This is all assuming you have a clear line of sight (no trees or buildings in the way), and outdoors. If indoors, you will be very lucky to get 500 feet.
Example - Where customer is outside, like in a park, and you can see the AP with nothing in the way.
Less than 100 feet, you will have have good signal.
From 100 feet to 500 feet, you will very likely have good signal.
From 500 feet to 1,000 feet, you will likely have good signal.
From 1,000 feet to 1,500 feet, you might have good signal.
Over 1,500 feet and it will *likely not work*.
If there are trees in the way, you may get one half of the above distances.
If there is a building in the way, you may get one tenth of the above distances.
If you are inside, you may get one tenth of the above distances.
If you have a smartphone, you may get one half of the above distances.
Please explain the statement "... they are tweaked to deliver longer distances". The people here are pretty knowledgeable. How is this accomplished without changing the channel size?
As for your 2 mile range, I've got 1 mile links with omni's at 5GHz at roughly -68dBm if I remember right. I can see getting 2 miles at reduced bandwidth rates and if you crank up the power. Personally my record is 1.2 miles to a laptop at 2Mbps on from a Vivato AP with a wave-guide 100 degree sector antenna on a roof to my laptop with a Cisco PCMCIA 802.11b card while sitting in a Jack-in-the-Box.