I thought the FT-4 signal is only 90 Hz wide....
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 4/30/2019 7:30 AM, Bill Somerville wrote:
Hi Gerard,
the Region 1 band plan specifies modulation not exceeding 500 Hz for
7046.5, Region 2 specifies modulation not exceeding 500 Hz for 7046.5,
and Region 3 specifies bandwidth not exceeding 2000 Hz for 7046.5. So
anything approaching 3kHz even temporarily seems non-compliant to me.
73
Bill
G4WJS.
On 30/04/2019 13:03, Gerard Hill wrote:
Of course it's not the full 3 kHz but a couple of hundred Hz less
than that. VARA uses OFDM I believe and varies the mode on each of
the carriers to maximise speed over the full channel.
ARDOP has various BW modes such as 500Hz, 2500 Hz and negotiates the
lower of the two stations.
Cheers,
Gerard - VK2IO
On Tue, 30 Apr 2019 21:25 Bill Somerville, <g4...@classdesign.com
<mailto:g4...@classdesign.com>> wrote:
On 30/04/2019 11:52, Gerard Hill wrote:
> Apologies in advance if we clobber your traffic. 7045 USB is used
> internationally for VARA and ARDOP modes. These are high speed,
> channel adaptive data modes with up to 3 kHz BW centred on 7046.5.
>
> Cheers,
> Gerard - VK2IO
Hi Gerard,
a 3kHz bandwidth signal in that section of 40m is not compliant
with the
band plans in any IARU region as far as I can see.
73
Bill
G4WJS.
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