I
see:
433 MHz
868 MHz
915 MHz
923 MHz
My understanding is that 868 is for Europe only. 433 and 915, and maybe
923, are allowable under Part 15
Correct.. these are unlicensed ISM frequencies and there are many
others as well:
?
but I am not sure the Lora modulation/power is ok at 433 under Part 15 (which is low duty cycle
only?), and my impression is that the Lora norm in the US is to use 915
under Part 15.
Anything is generally allowed on ISM frequencies within specific
power parameters, etc.
But, one can operate a 915 radio under 97 or 15, if the emission type
meets both rules. This seems similar to people using wifi hardware at
2.4, 3 and 5 GHz in spectrum that is authorized for both Part 97 and
Part 15 use, but choosing to operate under Part 97 rules, sometimes with
amps and higher gain antennas.
Correct.. up to certain power levels but also without being allowed
to run encryption, etc.
I would think that an APRS network would have to treat a Part 15 radio
as "internet" rather than "amatuer radio" in terms of gatewaying, and
that's what I was trying to ask about/understand.
APRS is just a protocol that you run on top of some other transport
be it LORA, 1200bps AFSK, etc.? Your choice of power levels and
other features will determine which frequencies are appropriate.?
For those of us in the US, then comes the rules be it Part 97, Part
15, etc.? Gatewaying into the Internet is essentially moot as the
FCC has no jurisdiction / rules / etc there.
--David
KI6ZHD
