Reply
Member
cmackay
Posts: 120
Registered: ‎08-14-2009
Posts: 120
Kudos: 1
Registered: 08-14-2009

AirFibre Max Distance

So we received the brochure on the AirFibre and are still stunned that it says distances of 13Km+ at 24Ghz.
Can someone confirm for me it will do full 1.4G (aggregate) at 13Km with perfect LOS and snow/rain fade?
Some more facts/specs would be helpful.

If it can do this, it is an amazing product.
CMack
SuperUser
Dave-D
Posts: 25,359
Registered: ‎06-23-2009
Posts: 25359
Kudos: 3720
Solutions: 419
Registered: 06-23-2009

Re: AirFibre Max Distance

No, of course it can't. As you well know,
specifications are based on absolute
best case. And as you also seem to
know, the 24GHz band is subject to
precipitation fade.
Ubiquiti can't turn back the laws of
rf physics--as you well know. All the
other Ubiquiti radios are not able to
provide both full speed and full range--
why expect this one to? Dave
No disclaimer. Nothing to sell. I need to fix that.
Member
cmackay
Posts: 120
Registered: ‎08-14-2009
Posts: 120
Kudos: 1
Registered: 08-14-2009

Re: AirFibre Max Distance

Just by the brochure:
"revolutionary performance of 1.4+ Gbps, aggregate throughput and 13+ km in range"
I guess it should have said:
"revolutionary performance of up to 1.4+ Gbps, aggregate throughput and max distances of 13+ km in range"
Thought maybe the boys had pulled something off and once again shattered Einsteins Theory's.
Is there somewhere to see the specs on distance vs throughput?
Thanks
CMack
Established Member
FreenetAntennas
Posts: 795
Registered: ‎12-14-2009
Posts: 795
Kudos: 166
Solutions: 9
Registered: 12-14-2009

Re: AirFibre Max Distance

+1 for more complete specs.
The other AirMax product spec sheets show RX sensitivity vs different data rates.
This allows us to estimate the trade-off between distance and speed and TX Power.
The AirFiber spec sheet is quite different in that it does not include the information we need to properly design a link, or to advise a potential customer how fast his link might run.
Rob Clark
Freenet Warehouse
Ubiquiti Distributor for Australia
Certified airMAX Instructor
Certified UniFi Instructor
SuperUser
wispwest
Posts: 2,873
Registered: ‎01-13-2009
Posts: 2873
Kudos: 481
Solutions: 6
Registered: 01-13-2009

Re: AirFibre Max Distance

The longest distance capable, always complies with the lowest useable data rates.
Veteran Member
Sirhc
Posts: 5,938
Registered: ‎09-02-2009
Posts: 5938
Kudos: 2166
Solutions: 27
Registered: 09-02-2009

Re: AirFibre Max Distance

If you want my "opinion" 1.5 to 2.5 miles +/- in a region that see significant rain fall at FULL modulation and remains up 99.999% over a year.
In drier regions people may feel comfortable around 3 to 4 miles +/- at FULL modulation with an up time of 99.999%
Snow is NOT much of an issue with 24 GHz, primarily just rain, mdeium to heavy rain.
This is all just "conjecture" based on years of experience with other 24 GHz gear.
I plan to full evaluate the gear, I will let you know if I was correct? Currently I run a dozen or so 24 GHz links.
RF Armor Shield Kits for Ubiquiti M gear
www.rfarmor.com
They really do work!
Established Member
rebelwireless
Posts: 1,231
Registered: ‎02-09-2010
Posts: 1231
Kudos: 262
Solutions: 4
Registered: 02-09-2010

Re: AirFibre Max Distance

someone from ubiquiti please supple the rx sensitivity numbers so we all can do some link planning.

Thanks
Established Member
sakita
Posts: 1,175
Registered: ‎10-20-2009
Posts: 1175
Kudos: 163
Registered: 10-20-2009

Re: AirFibre Max Distance

someone from ubiquiti please supple the rx sensitivity numbers so we all can do some link planning.

Thanks


Exactly... I've got some shots in mind of more in the 4 to 5 mile range. I don't expect the full 1.4Gbps but I'd like something better than fantasizing about it (e.g. mebbe 500 to 800Mbps... dunno).
Today is an average day: Worse than yesterday, but better than tomorrow.
New Member
eguzman
Posts: 23
Registered: ‎04-02-2013
Posts: 23
Kudos: 6
Solutions: 1
Registered: 04-02-2013

Re: AirFibre Max Distance

Hi!, i can give to you my experience statistics,

I depeloped a wireless link with AF24, the distance between the radios is: 6,655 m (21,834 ft), with the best alignment,(the best signal, and the same gain on all channels)

To get the max modulation (64 quam) i had to set the Tx power at 38 dB, and high gain in both devices... With this options i got a signal about 59-60. (all channels, both radios)

With a iperf probe i got a troughput around 650Mbps Full Duplex (real). The problem here is when a rain comes, the W-link suports without problem light rains, but storms with serious rainfalls the link gets down.

So i decided to put the link using 40 dB(México), the modulation keeps in  4x (16QAM MIMO) and i can pass trough allmost 500 Mbps but when the storm comes, the link goes to lowest modulation but still trough traffic.

With 40dB TX Power option the link gets down once, but the storm was really heavy!

 

edi

 

Ubiquiti Employee
UBNT-Chuck
Posts: 432
Registered: ‎06-21-2012
Posts: 432
Kudos: 241
Solutions: 18
Registered: 06-21-2012

Re: AirFibre Max Distance

Reply