Topics

PAVE/PAWS (Over-The-Horizon radar - shades of the woodpecker - in reverse!)

Bryan Hoyer <bhhoyer@...>
 

We use the CMX991 IQ Transceiver which can operate from 100MHz to 1GHz, but that doesn't mean the whole radio design works over that range.

The most likely next band will be 220MHz but as John says, we'll have to see how sales/revenue go.

Bryan K7UDR


On May 1, 2014, at 11:52 PM, siegfried jackstien <siegfried.jackstien@...> wrote:

Would it be possible to expand the frequency range to 23 cm???

What tuner chip (rx and tx) do you use???

Why restricted to 1000 megs??

(there are now such nice wideband rx tx chips available from 300 megs to 3
gigs ... any plans to "upgrade" the hardware?!?

Or are you already using such a chip (and you had just to change the soft
for a wider tuning range and maybe change a few components)???

Greetz

Dg9bfc

Sigi

> -----Ursprüngliche Nachricht-----
> Von: UniversalDigitalRadio@...
> [mailto:UniversalDigitalRadio@...] Im Auftrag von John D. Hays
> Gesendet: Freitag, 2. Mai 2014 05:45
> An: UniversalDigitalRadio@...
> Betreff: Re: [UniversalDigitalRadio] PAVE/PAWS (Over-The-Horizon radar -
> shades of the woodpecker - in reverse!)
> 
> 
> 
> Richard,
> 
> Our focus right now is getting the 70cm radio out to market.
> 
> The radio portion of the architecture can be repurposed to frequencies in
> the 100-1000 mhz range (not 23cm and we don't think 2m is a good choice)
> but we have to see the response to the 70cm version (e.g. how many do we
> sell) before approaching other bands.
> 
> The nice thing with this price range of radio is that you should be able
> to build networks of relay nodes in the valleys without the need for
> mountain top, radar footprint nodes.
> 
> 
> 
> ________________________________
> 
> John D. Hays
> K7VE
> PO Box 1223, Edmonds, WA 98020-1223
> <http://k7ve.org/blog> <http://twitter.com/#!/john_hays>
> <http://www.facebook.com/john.d.hays>
> 
> 
> 
> 
> 
> On Thu, May 1, 2014 at 9:12 PM, <u4gh@...> wrote:
> 
> 
> 
> 
> 
> 
> 
> Does anyone have ideas just how those of us living in the US near a
> PAVE/PAWS installation (e.g., most of California) are going to be able to
> operate this radio?
> 
> 
> 
> 
> 
> I was really looking forward to getting back into high speed digital
> radio, but the US government, who have the primary allocation in the 70 cm
> band is making it next to impossible to do much on 70 cm in the most
> populous areas of California (including Silicon Valley). 50 W PEP is the
> limit, but many of the repeaters with any visibility have been told to
> reduce the power output levels by *57 dB* or more!
> 
> 
> 
> 
> 
> We're being warned that we need to keep 70 cm signals 'off the
> radar', so to speak. We have to be very careful with 70 cm operation to
> prevent a total shutdown of the band in this area. Ugh. This is going to
> be a problem for much of the southern US: OET --47 CFR 2.106 Footnote US7
> <http://transition.fcc.gov/oet/info/maps/us7/>
> 
> 
> image <http://transition.fcc.gov/oet/info/maps/us7/>
> OET --47 CFR 2.106 Footnote US7
> <http://transition.fcc.gov/oet/info/maps/us7/>
> Federal Communications Commission
> View on transition.fcc.gov <http://transition.fcc.gov/oet/info/maps/us7/>
> Preview by Yahoo
> 
> 
> 
> 
> Any hope of a 23 cm (or other band) RF deck in the forseeable
> future? (I know that 23 cm is still 'DC' to Dennis. :-) ).
> 
> 
> 
> 
> (Or will there be a model with no power amp on it to experiment with
> high speed digital QRP? :-)
> 
> 
> 
> 
> - Richard, VE7CVS (/W6)
> 
> 
> 
> 
> _
> 
>