Yep, spendy.
The point to point stuff at gigabit speeds is priced as an alternative to fiber, so it's cheap compared to fiber, but we're on a much smaller budget in ham land :)
3.5 GHz is a good choice.
I helped implement a 3.5GHz ham system in the Bay Area. Two sectors on Black Mountain above Palo Alto, and a point to point link to Berkeley hills.
We used the ubiquiti radios and found a stash on eBay.
Randy
On 6/14/17 10:38 PM, Randy Neals wrote:
> Hi All,
>
> I spotted some interesting 10 GHz commercial Point-to-Point equipment that
> might work on our 3cm ham band. http://www.mimosa.co/products/b11
>
> The radio spec say is physically supports 10.0-11.7 but the FCC version
> available in the US is locked to 10.7-11.7 GHz. The radio is TDMA-FD so
> presumably no diplexers or band filters like classic duplex uWave gear to
> get in the way of operating lower in the band.
So it's about 3k for a pair of radios, then you need antennas, about $1800 for
a pair of HP dishes (though in the ham band we don't need that).
That's about $5000 for a link. It's not cheap by any means, and while cheap
for microwave, it's not cheap for hams :)
> The company is in Santa Clara..it might be possible to convince them to
> support a version that works on our 3cm ham band, 10.0-10.5 GHz. Countries
> in ITU Region 1 and 3 allocate 10.0-10.45 to Fixed service, so this may be
> as easy as buying the version with International software.
> It's a bit pricey, but could be good for backbone links, leaving 5 GHz for
> access nodes.
3 GHz works, and it's cheaper, under $1k per link.
>
> As I was researching this, I realized that Mimosa was the company that
> petitioned the FCC to reallocate the 10GHz ham band. Using their equipment
> on our 3cm band, and then showing how we're actually using the 3cm band
> might be fun! :-)
They claim their founder _was_ a ham, so it's ok to be anti-ham.
>
> Radio
> MIMO & Modulation 4x4:4 MIMO OFDM up to 256QAM
> Bandwidth Single or Dual 20/40/80 MHz channels
> Frequency Range 10000-11700 MHz restricted by country of operation
> Max Output Power 24 dBm
> Sensitivity ( MCS 0 ) -87 dBm @ 80 MHz
> -90 dBm @ 40 MHz
> -93 dBm @ 20 MHz
https://fccid.io/2ABZJ-100-00036
Internal pics
https://fccid.io/pdf.php?id=2829434
User manual
https://fccid.io/pdf.php?id=2829440
An atheros and transverter.
--
Bryan Fields
727-409-1194 - Voice
http://bryanfields.net
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