Re: LF: BINGO !! Opera decode from 477 via Delft sdr

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

 

Geri,

 

All of these decodes are  above the  -28 dB  minimum   for ros-mf-2   data  mode ........... should  be  able to  make a   2  way  qso , If  I  can  get the  same  level  at  your  end  !

 

Thinking  later , may  be  using  the  same  dial-set  qrg  for  the  Ros MF mode  , would be  a  better  idea  , than  setting  to  the  top of the  band , as the  Opera  qso  mode  is   1400/1600 Hz   and  would  not interfere   with  the  beacon  decodes , MF mode is  based  on 1500 Hz  both  packages  could  be  run at the  same  time , monitoring  477  

 

The  ROS MF modes  2+7 baud are  also  linked to the  psk-reporting  system  and  have  beacon   facility ,  for  MF-2 ,  De G0NBD  is  all  the  text  that  is  needed , the  software  detects  the  'De'  and  reads the  call  after  it  and  will  announce the  decode  via  the  web .......an  automated beacon  reply  is also  available  , where  the  station will  auto  reply  to a call  .........as in Opera  , no  web-time  locking  is  required .

 

73 -G..

 

 

00:36    500 DK8KW Op4 -23 dB
00:27    500 DK8KW Op4 -23 dB
00:14    500 DK8KW Op4 -26 dB
00:06    500 DK8KW Op4 -23 dB

 

00:44    500 DK8KW Op4 -20 dB
00:36    500 DK8KW Op4 -23 dB
00:27    500 DK8KW Op4 -23 dB
00:14    500 DK8KW Op4 -26 dB
00:06    500 DK8KW Op4 -23 dB

 

From: DK8KW & DI2BO

Sent: Saturday, June 16, 2012 8:45 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr

Graham,

 

I will look into ROS, I have a SSB exciter that works down to 100 kHz which should be able to do the trick.

 

 

Thanks, 73

 

Geri, DK8KW & DI2BO

 

 

----- Original Message -----

From: Graham

To: rsgb_lf_group@blacksheep.org

Sent: Saturday, June 16, 2012 9:10 PM

Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr

DF2JP

 

First  station  to  decode  off  air , at  -22 dB   that is  strong enough  to  use the  ROS-MF-2  data  mode  for  a qso !   , Opera  qso mode  needs  -20 dB min signal  level  ,

 

(ROS MF needs  Audio + ssb  or  SDR   tx  , but  is  MFSK  so  no need  for  a  linear PA )

 

18:44 500 DK8KW de DF2JP Op4 160 mi -22 dB in Duesseldorf with 0.4w + Umbrella,

18:44 500 DK8KW de G0NBD Op4 245 mi -29 dB in delft web sdr with 0.4w + Umbrella

 

From: Graham

Sent: Saturday, June 16, 2012 5:12 PM

To: rsgb_lf_group@blacksheep.org

Cc: nietoros@hotmail.com

Subject: LF: BINGO !! Opera decode from 477 via Delft sdr

First decode  from  477 ,  using  web-sdr  at Delft 

73 -G.

16:07 500 DK8KW Op4 -28 dB

*********** 16/06/2012 ***********

 

16:07 500 DK8KW de G0NBD Op4 245 mi -28 dB in delft web sdr with 0.4w + Umbrella