Narrowband version of ROS still not legal below 222MHz without FCC approval

Discussion in 'Amateur Radio News' started by K7MHI, Mar 5, 2010.

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  1. K7MHI

    K7MHI XML Subscriber QRZ Page

    ROS illigal again

    In mid-February, European amateurs first used a new, experimental digital mode known as ROS. On February 23, 2010 -- after FCC review of the original documents provided from the developer's Web site -- the FCC made the following statements on ROS:

    "Section 97.305 is the rule that specifies where different emission types are allowed to be transmitted on different bands. 'ROS' is viewed as 'spread spectrum,' and the creator of the system describes it as that. We assume that he knows what he created. [Section] 97.305 authorizes spread spectrum emission types (defined in Section 97.3) to be transmitted by FCC licensed amateur stations at places we regulate communications only on 222-225 MHz and higher frequency amateur bands. European telecommunication regulatory authorities may authorize amateur stations in Europe to use SS on the HF bands, but this is of no concern to us. The Commission does not determine if a particular mode 'truly' represents spread spectrum as it is defined in the rules. The licensee of the station transmitting the emission is responsible for determining that the operation of the station complies with the rules. This would include determining the type of emission the station is transmitting and that the frequencies being used are authorized for that type of emission."

    Since that initial FCC review, several Internet sites have reported a claim -- attributed to the FCC -- that the original statements made had been reconsidered and that the FCC view was now that "ROS cannot be viewed as Spread Spectrum and it would be encompassed within Section 97.309 (RTTY and data emissions codes)."

    When queried about this new statement, the FCC's Consumer Assistance Office stated that "[T]he information contained on the ROS Web site was not provided by the FCC." They then reaffirmed the original statements that originated from the FCC's Wireless Bureau, which handles Amateur Radio rules for the US.

    The ARRL supports -- as one of the basic purposes of Amateur Radio -- the experimentation and advancing the technical skills of operators. The development and use of any new mode is exciting to many amateurs, and the League encourage amateurs to experiment within the parameters of the rules; however, the ARRL also reminds US licensees that according to Section 97.307, spread spectrum communications are only permissible in the US on frequencies above 222 MHz.
  2. G4TUT

    G4TUT Ham Member QRZ Page

    Narrowband version of ROS

    José Alberto Nieto Ros
    has introduced a new narrowband version of the well-known amateur radio digital mode ROS

    ROS now has a mode which only uses 500 Hz bandwidth enabling it to be used in the narrow band mode section of the HF bands.

    You can find out more about ROS at

    ROS Sked

    Digital Radio Yahoo Group

    RSGB Band Plans

    Get Southgate Amateur Radio News by Email

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  3. NN4RH

    NN4RH Premium Subscriber QRZ Page

    Actually the top story on that page you linked to is a rant against the ARRL over their recent declaration that CHIP64 is illegal for HF, mostly an attack on ARRL's Dan Henderson.

    The note does point out (correctly, apparently) that Virginia NTS system has been using CHIP64 on 80 meters for years, and this would be illegal if ARRL's Dan Henderson is correct.

    The story about the 500 Hz wide ROS mode, which the OP was intended to highlight, is just a small blurb farther down the page, and no details are given.
  4. K5OKC

    K5OKC Ham Member QRZ Page

    What is the callsign of the developer?
  5. WJ6R

    WJ6R Ham Member QRZ Page

    Reads more like a temper tantrum to me. It's just another digital mode, another flavor of the day, and more new modes will come.

    If we cant use it, so what, there's a bunch of others! Most of the digital stuff on HF is CW, RTTY and PSK-31 with Pactor ARQ for Winlink and the keyboard to keyboard on 14.313.

    But his issue is with Part 97 of the rules, not with Dan, the ARRL or the USA, however he seem to want to personalize this issue of legality.
  6. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    Hopefully the attention and discussion will turn back to the technical merits and advantages of the mode itself.

    I think the behavior of all parties, official and private, has been disappointing.

    More discussion, less uninformed snap decision making!

    73, Bill
  7. W9IQ

    W9IQ Ham Member QRZ Page

    ROS not legal on HF for US Amateurs

    The FCC has reaffirmed that ROS, at the self declaration of the author, is a spread spectrum mode and therefore is illegal below 220 MHz.

    - Glenn W9IQ
  8. KY5U

    KY5U Subscriber QRZ Page

    Thanks for posting this comment. Yep, and a poor amateur who tried to get the author's false FCC declaration otherwise out on QRZ has since apologized (which I respect him immensely for doing).

    The author is not a ham.
  9. KQ6XA

    KQ6XA Ham Member QRZ Page

    ROS not legal yet for USA hams


    Public documentation is required for a digital mode, BEFORE a USA ham can legally use it.

    Complete public documentation has not yet been provided for any of the ROS modes.

    The "narrow" and "wide" (spread spectrum or not) versions of ROS are not legal for USA hams until the proper FCC process is completed.

    Last edited: Mar 6, 2010
  10. G0GQK

    G0GQK Ham Member QRZ Page

    Something I did notice when looking at the list of frequencies which were recommended for using ROS was 24.920 the PSK frequency and 28.120 another PSK frequency. Considering that 10 metres is the widest set of frequencies on HF, why did somebody decide the ONE frequency used for PSK activity would be OK ? And the same comment applies to 12 metres.

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