VHF-UHF-uW Papers for IARU Region 1 Interim
Conference – Vienna 2007
The IARU Region 1 Interim Conference will be held in Vienna from February
24 to 25th 2007.
The VHF-UHF-uW papers for this conference have now been posted to the
Region 1 website at http://www.iaru-r1.org/IARU%20R1.htm
The preliminary version PDF is currently at
http://www.iaru-r1.org/vienna_2007_preversion.pdf
But this may change in the coming days, check the website for details.
It is pleasing to see that the Radio Society of Great Britain (RSGB)
is putting forward a significant number of important papers for the conference.
B01 - Increased Amateur Satellite Service 2 Metre Usage
Proposes the segment 144.315-144.365 MHz be used by QRP CW/SSB Linear
Transponder downlinks of student Amateur CubeSat projects on a non-exclusive
basis. A growing number of University Student Groups are expressing an
interest in developing satellites with Amateur Radio transponders and
these young people represent the future of the Amateur Services.
B02 - Bands above 275 GHz
If you thought 75 GHz was esoteric well think again, Amateurs are planning
to make use of the frequencies above 275 GHz. This well presented paper
highlights the key allocations that pioneering Amateurs need in this "frontier
territory".
B04 - A review of the implementation of 12.5 kHz Channel
Spacing System in the 145 MHz Band
This timely paper addresses the issue of receiver performance in a 12.5
kHz environment. Even some rigs that claim to have 12.5 kHz filters can
perform poorly in the presence of strong adjacent channel signals because
the filters fitted have a very poor shape factor. They may well achieve
over 40 dB attenuation 8 kHz off channel but they then flatten out and
the attenuation 12 kHz away may be little more than 50 dB. This means
if a station on the adjacent channel is 50 dB over 9 you'll still get
them strength 9!
Ironically Japan switched over to the more demanding 10 kHz channel spacing
on 2 metres over 15 years ago so it's surprising the rigs they export
aren't fitted with decent filters.
B05 - Frequency Allocation for Digital Voice Communication
within the 145 MHz Band
Digital voice in various guises from D-STAR to WinDRM is already with
us. This paper addresses the issue of where it should initially be used
in the 2 metre band.
B07 - Changes to the exclusive usage of 144.000-144.036 MHz
for EME Communications
This paper highlights the effects of spectrum pollution from a range of
consumer electronic devices that are making the lower 50 kHz of 2 metres
unusable for weak signal communications.
B13 – Amateur Allocation at 3400 MHz
A well-illustrated paper proposes a Region 1 Amateur and Amateur Satellite
allocation at 3400 MHz, which would line up with other parts of the world.
B14 - Microwave Spectrum Threats
Details the many threats to our Microwave allocations.
B15 - 23cms Band Plan
The Galileo Global Positioning System, which will use 1260-1300 MHz, may
mean that we have to consider using 1240-1250 MHz for narrow band operation.
B16 - Amateur Satellite Service Spectrum
This details the additional VHF and Microwave Satellite allocations that
we will need to counter the loss of large swathes of Amateur Microwave
allocations to unlicenced devices and Government spectrum sell-offs. Some
of the bands proposed could also provide us with an opportunity to align
microwave weak signal terrestrial and satellite operations.
A Yahoo Reflector has been established for Discussion of C5 (VHF-UHF-uW)
Papers. To join go to
http://uk.groups.yahoo.com/group/ukc5discussion/
RSGB Spectrum Forum Committee pages for C5 (VHF-UHF-uW)
http://www.rsgb-spectrumforum.org.uk/iaru_reg_1_c5_committee.htm
Although the RSGB has a small core of HQ staffers it relies heavily on
the many volunteers who give freely of so much of their spare time to
support the Society both in preparing for and attending conferences.
Our Amateur allocations are valuable and are always under threat. The
ITU WRC 2007 takes place in October 2007 and the work that will be done
in Vienna will hopefully pave the way for a successful outcome for the
Amateur Radio Services at the ITU conference.
RSGB Website
http://www.rsgb.org/
World Radiocommunication Conference (WRC) 2007
http://www.itu.int/ITU-R/conferences/wrc/wrc-07/index.asp
ITU Radiocommunication Sector
http://www.itu.int/ITU-R/
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