On Sep 1, 5:31*pm, Andy wrote:
On Aug 31, 7:40*pm, Darryl Ramm wrote:

The choice of the actual frequncy to be used has
been done for years (and your Flarm units will probalby tune to that
frequncy if you brought them here). The first chance for USA pilots to
adopt this technology will be the upcoming PowerFLARM product.

More clarity requested.

If Existing FLARM supports the freq to be allocated in US why are not
manufacturers of those units jumping on the US market and getting FCC
certification. *I know what freqs are supported by FLARM as I have the
documentation. What freq is being used for USA and where is that
published?

We've been over the frequency here, I've said 915 MHz, there was some
innocent confusion from others and Urs from Flarm confirmed its
915MHz. Its on the 915 MHz ISM band using spread spectrum
communications. This has actually been known in the Flarm community
for a long time. Discussed on Flarm forums and it is mentioned in some
Flarm documentation (but not all versions of all docs - no I don't
know why).

Why are we waiting for PowerFLAM with it's still undocumented new
features when FLARM products already exist?

Because there are no FCC approved Flarm products from any vendor that
can legally be sold in the USA.

Flarm is busting their ass to get the new generation RF unit in
PowerFLARM FCC approved, its non-trivial work. As in previous products
the RF unit is Flarm's technology and they are buried in work getting
the certification done. I doubt they would be able to stop work on a
new generation product right now and go help others certify existing
products. Flarm is not a multinational company with unlimited
resources, they are a small group of pretty clever engineers.

On the other hand, if Power FLARM is being built with an RF section
that is unique to USA then potential purchasers may want to know that.
It could limit both resale value and its usefulness for US pilots that
fly overseas.

I know enough to say that the RF unit on the PowerFLARM is
definitively not "unique to the USA". PowerFLARM units brought here
and brought overseas will work in any location.

So why is US PowerFLARM not identical with PowerFLARM being marketed
to the rest of the world and are the systems interoperable?

Andy

The USA is different from the rest of the world. Starting with we have
no Flarm installed base here and we have ADS-B data-out rolling out
here that touches a large number of aircraft unlike anywhere else.
That combination is unique. And I suspect that is largely driving
Flarm to enter the USA market with a combined ADS-B receiver/Flarm
product. With how complex things are already with ADS-B I am actually
glad they are doing that.

Darryl