LF: AW: Test of ROS 100 Mf Mode tonight

["Beckmann, Gerhard" <beckmann.erlangen@freenet.de>]

Hello Graham, Hello Jim, LF;

 

I received just now a part of the QSO (M0BMU / G0NBD) in ROS 100 MF Mode.

SNR is about -17 dB, weakly audible here in JN59LN.

Later on I will try to copy also the message from G0NDB, condx are not too good this evening..

 

73 de Gerhard  // DK6NI  //  JN59LN

 

============================

 

RX7: <21:43 UTC> <23,4 Hz> G0NBD de M0BMU ge Graham tnx for call you ae are currently at SNR of about -16dB here with usual QSB. Ur sig is weakly audible most of the time, fading out duringetQ QSB, but solid c .y so far. Quiteexlot RN ot on the band tonight. Running about 100W or theoexuts... the antenna is not quite properly tuned I I ae see... so BTU Graham G0NBD de oBMU kkk <STOP> <-17 dB>

 

 

 

 

---

Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Graham
Gesendet: Freitag, 14. Mai 2010 22:32
An: rsgb_lf_group@blacksheep.org
Betreff: LF: Test of ROS 100 Mf Mode tonight

 

Beacon now back to  20  watts  / 60 second prf 

 

ROS - 100 Hz MF    mode 7

 

Dial set  502.000 usb  / RX  is  ON  , (mode 7 & 1 )

 

QRZ de G0NBD  

 

 

 

From: Graham

Sent: Friday, May 14, 2010 7:29 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Test of ROS 100 Mf Mode tonight

 

Beacon running  at  190 mW  feed  to the  Ae  , qsl  from Lee  , showing  good  copy  over  75  miles , over a  310 Mtr   ridge in the  process

 

M0LMH has received your Radio Message sent at: 18:20 UTC    (  moon is miss  decoded)

Received Message: 'the quick brown fox jumps over the lazey ofon 1234567890 G0NBD  testing 0.19 w <g0nbd@hotmail.com> <STOP>'

 

Thanks  for  reports  Lee

 

G ..

 

 

From: Graham

Sent: Friday, May 14, 2010 1:18 PM

To: rsgb_lf_group@blacksheep.org

Subject: LF: Test of ROS 100 Mf Mode tonight

 

 

From: G ..

Sent: Friday, May 14, 2010 1:17 PM

To: rsgb_lf_group@blacksheep.org

Subject: Test of ROS 100 Mf Mode tonight

 

Test of  ROS   100 Mf Mode  tonight 

 

Thanks to  all  who  supplied  information of there respective 500 KHz   permitted transmission bandwidth.

 

After  some negotiation ,  Jose has  coded  a 100 Hz of his  ROS  data  software , this  now  gives the  system an    ‘MF’   mode operating  inside the  100 Hz  licence conditions

 

The 7 baud  mode is a  live  keyboard mode , being  fast enough to  maintain a  reasonable qso  speed , with  selectable  afc  range

 

The  1 baud  mode is perhaps  more  of  a  beacon mode , but  offers  enhanced performance  and is perhaps a  contender to the  conventional  QRS/S  modes

 

Transmission of the  mode  requires  the  traditional  audio  to  rf  translation , but as it’s a  single  carrier  system , non linear amplification systems may be deployed.

 

This is the  first  custom built data   mode  resulting  from the  interest and  participation of  monitoring and  active  stations ,  of a   transmission  system experiment  undertaken on 500Khz  facilitated by  the  OFCOM issued  UK experimental research  permit

 

 

The  software  may be  freely  downloaded from  http://rosmodem.wordpress.com/

 

TX / RX  set :::   502.000 KHz  USB 

Carrier centre frequency   will  be   503.000 KHz   +/-  49 Hz

 

Many thanks'  to all

 

Graham

 

G0NBD