Re: [digitalradio] ROS MF-7 IS OUT THERE ! (And less than 100 Hz wide)

[Andy obrien]

good news, nice to see this mode make good progress.

Andy K3UK

On Sat, May 15, 2010 at 9:53 AM, graham787  wrote:

>
>
> After a series of successful test transmissions, the latest version of
> ROS-3-6-1 (at the moment) now has the MF mode included , this allows live
> key board qso's at a data rate close to 500/8 and also has a baud-1 mode
> with enhanced s/n performance , transmission via non-linear systems is
> possible , though the logic drive of class e/d will still present problems.
>
>
> To comply with the EU 100 Hz data bandwidth of the 500Khz permits the mode
> is coded to occupy less than 100 Hz , the first custom mode to be produced
> to enable data communications with in the EU on MF
>
> The first on air qso over 200 miles is listed >
>
> http://lfistes.erst.azerttyu.net/viewtopic.php?f=17&t=1982&sid=5f68ac5172a5c1206\
> 214df5b03c2bc50
>
> Scroll down the page ... and you will see the RX station F4DTL was in Paris
> 650 Km from myself running 20 watts to 35 ft top loaded vertical and round
> 325 km from Jim running 100 w to a similar array
>
> Its quite possible that the 100 Hz mode will function well over HF over the
> polar paths where psk tends to fail ?
>
> G ..
>
>  
>

[digitalradio] ROS MF-7 IS OUT THERE ! (And less than 100 Hz wide)

[graham787]

After a series of successful test transmissions, the latest version of
ROS-3-6-1 (at the moment) now has the MF mode included , this allows live
key board qso's at a data rate close to 500/8 and also has a baud-1 mode
with enhanced s/n performance , transmission via non-linear systems is
possible , though the logic drive of class e/d will still present problems.

To comply with the EU 100 Hz data bandwidth of the 500Khz permits the mode
is coded to occupy less than 100 Hz , the first custom mode to be produced
to enable data communications with in the EU on MF

The first on air qso over 200 miles is listed >
http://lfistes.erst.azerttyu.net/viewtopic.php?f=17&t=1982&sid=5f68ac5172a5c1206\
214df5b03c2bc50

Scroll  down the  page  ... and you  will  see  the  RX station F4DTL was in 
Paris  650 Km  from myself running  20 watts  to  35 ft top loaded vertical  
and  round 325 km from Jim running 100 w to a similar array  


Its quite possible that the 100 Hz mode will function well over HF over the
polar paths where psk tends to fail ?

G ..

[digitalradio] ROS MF-7 IS OUT THERE ! (And less than 100 Hz wide)

[graham787]

After a  series of  successful test transmissions, the  latest version of 
ROS-3-6-1 (at the  moment)  now  has the  MF mode included , this allows live 
key board qso's at a  data  rate  close to 500/8 and also  has a baud-1 mode 
with  enhanced s/n performance , transmission via non-linear systems is  
possible , though the logic drive of  calss e/d will  still  present problems. 

To comply with the  EU  100 Hz data  bandwidth  of the 500Khz permits the  mode 
is  coded to  occupy less  than 100 Hz , the  first custom mode to  be  
produced to enable data  communications with in the  EU on MF 

The  first on air qso  over 200  miles is  listed > 
http://lfistes.erst.azerttyu.net/viewtopic.php?f=17&t=1982&sid=5f68ac5172a5c1206214df5b03c2bc50

Its quite possible that the  100 Hz mode will  function well  over HF over the  
polar  paths where  psk tends to  fail ?

G ..