ad: Alphaant-1

New DigiMode — ROS. 1st QSO this evening.

Discussion in 'Amateur Radio News' started by GM4BRB, Feb 19, 2010.

Thread Status:
Not open for further replies.
ad: L-HROutlet
ad: l-rl
ad: Left-2
ad: abrind-2
ad: Subscribe
ad: L-MFJ
ad: Left-3
  1. GM4BRB

    GM4BRB Ham Member QRZ Page

    Recorded at University of Twente (Netherlands) Web SDR:
    http://websdr.ewi.utwente.nl:8901/

    2205z ROS: PA3FWM, one hour ago has place the first offcial QSO with ROS, and it was received at this SDR. Thank you
    2205z PA3FWM: Ah, I had seen your repeated advertisements for your experiment, so it's nice to know that it worked out!
    2206z ROS: It was a historical moment. It was on 7065 LSB

    The First QSO
    18 February 2010, at 20:56 UTC took place the First Official QSO with ROS from Vitoria (Spain) to University of Twente (Netherlands) covering a distance of 1265 Km. on 7.065 Mhz. The first Ham Radio Operator to get it was EA2LE.


    [​IMG]
    [​IMG]
    The First Automatic Reply
    ROS notification: EATEST has received your Radio Message
    ********** Please don’t reply to this email ********************
    EATEST has received your Radio Message sent at: 21:03 UTC
    Received Message: ‘CQ CQ CQ de EA2LE EA2LE EA2LE pse k My email is: <ea2le@ure.es> <ea2le@ure.es> <ea2le@ure.es>’
    Operator Info:
    Callsign: EATEST
    Name: Jose Alberto Nieto Ros
    E-mail: nietoros@hotmail.com
    QTH: La Aljorra-Cartagena SPAIN
    Locator: IM97lq
    Station: web SDR
    ROS Version: 1.6.1 beta
    Signal Info:
    Symbol Rate: 16 bauds
    Frame Acquisition: 20/20
    Final Acquisition: 15/16
    Frequency Shift: -39,1 Hz
    Symbol Errors detected by Viterbi: 2/50
    Metric: 0 dB
    Vumeter Level: -8 dB
    CPU Usage: 20 %

    Download the ROS beta Software and give it a try, sounds cool.
    http://rosmodem.wordpress.com/
    Requires WinRaR or similar Rar unzipper.
     
  2. K4NIN

    K4NIN Ham Member QRZ Page

    ...

    So, can we use this in the US? Is it legal here? Frequencies?
    Sounds fun..
     
  3. AD7N

    AD7N Ham Member QRZ Page

    It's completely dependent on bandwidth.

    I've dug some and can't find the bandwidth of this thing. :confused::confused::confused:
     
  4. AD7N

    AD7N Ham Member QRZ Page

    Yes! According to the comments on his site:

    This thing has an S/N of -35dB @ 1baud, I think that's a new record!

    WSPR is around –28-30dB!
     
    Last edited: Feb 19, 2010
  5. N9DSJ

    N9DSJ Ham Member QRZ Page

    Any evidence of this, even anecdotal? EME ops will be all over it if true...

    73,

    Bill N9DSJ


     
  6. VE3TEF

    VE3TEF Ham Member QRZ Page

    receiver online

    My receiver is online tonite to see if there is anything on 7056. Looks like and interesting mode!
     
  7. AD7N

    AD7N Ham Member QRZ Page

    I have pretty good evidence: For starters, if you use the supplied WAV file on the website (labeled as a test sample of -35 dB S/N), you get -35dB S/N. This noise has fairly high peaks and some good troughs.

    I've been playing with Audacity and playing recording of the mode and noise at the same time, and I've gotten at least -31dB with fairly reliable copy. I used the white noise generator in Audacity, and read the "Metric" scale in ROS. Audacity's "white noise" is a worse-case scenario - absolutely NO nulls or peaks. I would say -31dB in this scenario is pretty darn good, considering real-life noise will wax and wain over time.

    -31dB is beyond WSPR mode, and ROS is real-time, whereas WSPR requires ~2 minutes to decode before you can read it.
     
    Last edited: Feb 20, 2010
  8. BA4TB

    BA4TB Guest

    The download web page is blocked here,could anybody setup a mirror site for downloading?
    thank you!
     
  9. K2WH

    K2WH Premium Subscriber QRZ Page

    msg deleted by me.
     
    Last edited: Feb 20, 2010
  10. K2WH

    K2WH Premium Subscriber QRZ Page

    My Norton Utility stopped ROS dead in its tracks. Msg received from Norton was ROS is a security risk. Installation was terminated and Norton deleted the program.

    K2WH
     
    Last edited: Feb 20, 2010
Thread Status:
Not open for further replies.

Share This Page