ARLA/CLUSTER: ARRL : Novo modo ROS não é permitido em HF e VHF nos E.U.A.

[João Costa > CT1FBF]

 ROS on HF outside scope of US Amateur Radio license

*An email from the ARRL Regulatory Information Manager indicates the use of
the new data mode ROS on HF, 6m and 2m is not allowed by the US Amateur
Radio license*.
Although ROS only occupies a bandwidth of about 2.2 kHz it is technically a
Spread Spectrum mode and the FCC only permits Spread Spectrum on frequencies
above 222 MHz.

The mode is used on HF by Amateurs in countries around the world without any
problems, the USA seems to be the only country where it is an issue.

In 2005 the ARRL tried unsuccessfully to get the FCC to adopt band planning
by bandwidth instead of the current restrictive band planning by mode. It is
to be hoped that the situation with ROS will clearly highlight the
inadequacy of the current US license regulations and will lead to a renewed
move to change them.
------------------------------

*The email from the ARRL was posted on the Digital Radio Yahoo group and
reads:*

From: Henderson, Dan N1ND
Subject: RE: Spread Spectrum
Date: Tuesday, February 23, 2010, 7:13 AM

Hi

I ran this by our technical experts. They concur that ROS is a spread
spectrum mode and as such is not allowed by the FCC on bands below 222 MHz.
Remember that approved emissions vary from IARU Region at times as well as
between countries. So while the IARU Band Plan for Region 2 would allow it,
*SS is not permitted on the HF bands by the FCC*/

Thanks and 73

Dan Henderson, N1ND

Regulatory Information Manager
ARRL, the national association for Amateur Radioâ„¢
*
------------------------------
*
*ROS* is a brand-new Amateur Radio digital spread spectrum mode.

The first contact with ROS took place on February 18, 2010, at 20:56 UTC
from Vitoria  in Spain to the University of Twente in the Netherlands
covering a distance of 1265 Km on 7.065 MHz.  The first Ham Radio Operator
to receive was *EA2LE*.

The *HF frequencies currently used for ROS are USB 3.600, 7.053, 14.101,
28.300* *MHz*

To use ROS *you just need your HF radio, a PC and a basic PC sound card
interface*, see link below.

The software for ROS is free and can be found at
http://rosmodem.wordpress.com/ along with the Introduction to ROS Spread
Spectrum and a user guide
Amateur Radio data mode ROS proving popular
http://www.southgatearc.org/news/february2010/ros_proving_popular.htm

2005 ARRL Petition For Rule Making
http://www.arrl.org/announce/regulatory/bandwidth/Bandwidth-Minute-64-Petition-FINAL.pdf

Digital Radio Yahoo Group
http://groups.yahoo.com/group/digitalradio/
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