6 Jul
2013
6 Jul
'13
12:34 a.m.
There were a couple of them at DCC Atlanta last year and they chewed up the
70cm band. US regulations limit to 56kbaud per carrier within 100 khz
channel on 70cm. 97.307:
(6) A RTTY, data or multiplexed emission using a specified digital code
listed in §97.309(a) of this part may be transmitted. The symbol rate must
not exceed 56 kilobauds. A RTTY, data or multiplexed emission using an
unspecified digital code under the limitations listed in §97.309(b) of this
part also may be transmitted. The authorized bandwidth is 100 kHz.
------------------------------
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 Fri, Jul 5, 2013 at 10:54 PM, Ronen Pinchuk <drorap(a)netvision.net.il>wrote;wrote:
(Please trim inclusions from previous messages)
_______________________________________________
First of all it uses FHSS so it is not so interfeer to the other users ...
second the bandwith can be adjusted (on the throughput of course) up to
2
MHZ if i remember correct
but for me the big benefit is that it allow to have a mobile connection
because it does not require line of sight a thing that 2.4GHZ require and
also with 0.5W on 70CM you can get much bigger distance then with a
regular WIFI gear
----- Original Message -----
From: "Eric Fort" <eric.fort(a)gmail.com>
To: "AMPRNet working group" <44net(a)hamradio.ucsd.edu>
Sent: Saturday, July 06, 2013 6:06 AM
Subject: Re: [44net] a common vendor neutral hardware/software stack for
44net. - was Re: hardware vs. software
(Please trim inclusions from previous messages)
_______________________________________________
I remember hearing about these though I'd consider these to be somewhat
of
an oddity. again why 70cm, only 30MHZ wide &
already filled with other
users? Why is everyone so damn scared and afraid of moving to the
amateur
microwave bands where we have 1555MHZ of mostly
unused spectrum from
1.2-47.2GHz? Why must we recreate the wheel so much of the time when it
may be better, faster, easier, & cheaper to use directly or adapt a
solution already in use in another service.
Eric
AF6EP