[MVMA] New local AREDNite: Steve KD8MKG

[kd8mkg]

Hey Chuck,

Thanks for this!  Do you have a ballpark idea of the receive threshold
performance for these radios?

Online I'm reading indications that ~80dBm is the absolute floor of
something that's marginally reliable; but this source seems to indicate it
is referring to consumer devices.  Assuming antennas with a gain of 12dBi
at both ends, and 500mW Tx power, my link study suggests a total path loss
of ~140dB, and receive at about -94dBm.  Rokland sells a 2.4GHz panel with
a claimed 19dBi gain and a 17˚ beam width, which would hypothetically get
me to around -86dBm.  If I paid for dedicated hardware at both ends, and
had a 19dBi panel at prestige, I could get myself into the yellow at about
~79.86dBm.  It is possible, though, that these commercial radios are more
sensitive than I'm assuming.

I have field experience with the 915MHz LoRa hardware, but I'm sort of
guessing with this stuff.  And perhaps more importantly, as my brother
says; *in theory, practice matches theory; in practice, it does not.
*Considering
the low cost of entry, the best course of action might just be to put up
an antenna and see what happens.

Cheers!
Steve

On Wed, Jun 28, 2023 at 5:38 AM Chuck Gelm <nc8q-aredn at gelm.net> wrote:

> On 6/28/23 04:39, Chuck Gelm wrote:
>
> Here is Steve's profile toward Prestige Plaza:
>
>
>
> http://gelm.org/images/Profiles/KD8MKG-30ft_PP-99ft_5800MHz_1r8miles_188degrees.png
>
> KD8MKG on left at 25' elevation, PP on right at 99 ft elevation.
>
> It looks like Steve is 'in the trees' for 0.6+ miles.
>
> Steve:
>
>  You mentioned that your device cost $70.
> Many of our devices are about $60-$70.
> 99% of our devices are a single package with a radio/antenna and POE
> injector.
> Power and data are provided via POE (Power over ethernet) cable.
> Power ~315 to 630 mw.
> Raw data rate up to 130 Mbps (144.4 with Short Guard Interval).
> Newest devices are 802.11ac with data rates up to 156 Mbps (173.3 SGI)
> Most of the devices in service are commercial quality, outdoor rated, and
> off-the-shelf.
> Highly recommended for the 'shack' is a Mikrotik RB952Ui at $45-$60.
> It has 5 ports: WAN, 3xLAN, 1 Device-to-device to link with an outside
> AREDN radio/antenna.
>
> 73, Chuck
>
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