Thursday, February 02, 2006

The codes that connects

Publication :
NSUNT
Edition :
Date :
16/10/2005
Page Number :
11
Headline :
The code that connects
Words :
959
Byline :
By YONG TIAM KUI
Text :
IT was in the mid-1830s that Samuel Morse came up with what is known as
the Morse Code. Today it is used almost exclusively by amateur radio
operators. But, writes YONG TIAM KUI, even among their ranks, many feel
that this mode of communication is outdated and no longer of any
relevance. Yet...
HARDLY anybody uses the Morse code anymore. But the Malaysian
Communications and Multimedia Commission is still holding Morse Code
tests several times a year.
This is because the country's amateur radio operators, known
affectionately as hams, are required to have a Morse code speed of 40
words per minute to be eligible to apply for a Class A ham radio licence.
This is unusually stringent as the Conference of Postal and
Telecommunications Administrations lowered the amateur radio Morse code
test speed requirement for all European countries to just five words per
minute in 2001.
Two years ago, the World Radio Communication Conference of 2003
recommended that the International Morse Code requirement for amateur
radio licensing be made optional.
A number of countries, including Ireland, Switzerland, Belgium,
Britain, Germany, Norway, the Netherlands, Austria, New Zealand,
Australia, Luxembourg, Singapore and Papua New Guinea, have already
dropped their Morse testing requirements altogether.
A Class A licence is greatly coveted by Malaysian hams because it gives
them the right to operate on an unlimited range of frequency bands
allotted to amateur radio. This allows them to communicate with fellow
hams practically anywhere in the world.
A Class B ham radio licence limits them to a much narrower band of
frequencies that are only good for "line of sight" communications.
This means that their radio signals cannot be transmitted beyond a
distance of 30km or if there is a physical barrier, such as a mountain,
in the way.
However, hams in Peninsular Malaysia with Class B licences are luckier
than their counterparts in Sabah and Sarawak. There is a system of relay
stations around the peninsula which enables them to talk to each other.
MCMC has indicated that the Morse Code requirement will no longer be a
mandatory requirement from April 1, 2007.
For many Malaysian hams, this particular April Fool's Day couldn't come
sooner as they feel that Morse Code is utterly irrelevant as they can
also make use of SMS and email to communicate with hams worldwide if
necessary.
However, hams belonging to the old school hold that doing away with the
Morse Code test would be detrimental and contrary to the heritage of ham
radio.
They believe that the Morse Code will always remain relevant because it
can be used under difficult conditions when other modes are unavailable
or are not in working order.
The split between the opposing camps is mostly along generational lines
and this is reflected among the Chows who are a family of avid hams.
Like most older hams, Dr Chow Chee Onn, 58, hails from the old school
of thought. He feels that Morse Code is an important part of the ham
radio hobby and should be kept in use if possible.
However, being of a flexible frame of mind, he concedes that hams who
feel otherwise should not be forced to take the Morse Code test.
"I feel that it is good to learn the Morse Code but it shouldn't be
made mandatory," he adds.
After all, says Chow, many hams who take the trouble to master the code
do not have much opportunity to make use of it.
His son, Sion Chow Qi Chao, who is vehemently opposed to the Morse Code
requirement, has steadfastly refused to take the test even though he
would love to get hold of a Class A licence.
He's making do with his Class B licence. And, despite all its
constraints, the 21-year-old computer science graduate has managed to
befriend hams in Japan, Thailand, Philippines and India by riding onto
non-commercial amateur radio satellites whose footprints are in the
region.
He has also managed to make contact with astronauts Mike Fincke (Oct 8,
2004) and Sergei Krikalev (Aug 27, 2005) at the International Space
Station.
Sion's hearty dislike of the Morse Code test is shared by Mrs Chow. She
would gladly see it abolished.
Mrs Chow says she decided to get into the hobby because the ham radio
is a more reliable way for her to stay in contact with her husband.
"He often forgets to take his handphone but his ham radio is always
with him. It's also a lot cheaper than using a handphone," she adds.
Chow's involvement with ham radio began during his schooldays in Ipoh.
"I became interested when I was in Form III in Sam Tet Chinese
Secondary School.
"We built our own amplifiers to listen in to radio communications. When
I was at the Technical College (now University of Technology), I made use
of the facilities of the ham radio club."
A civil engineer, Chow enjoys designing antennae for improved reception
of radio signals.
In fact, he has built a large iron framework as a base for the antennae
right next to the wall of his corner house in USJ15, Selangor.
"I wanted to share my knowledge with my son. He's now more advanced
than I am," he adds.
Chow has invested some RM40,000 in equipment for the hobby but he says
beginners can start with equipment costing as little as RM800.
"When you have got nothing to do, you can talk to somebody. If my son
and wife don't want to talk to me, I can talk to other people!
"In time of distress, you can help in rescue work. You can still
operate on battery when the electricity supply goes."
THE International Morse Code uses a pattern of long and short pulses to
represent the letters of the alphabet and the 10 numerals.
These long and short pulses are translated into electrical signals
using a telegraph key.
The electrical signals are translated back into the alphabetic
characters by an operator at receiving end.
The Morse Code was used extensively from the 1890s. With the
development of more advanced communications technologies, it is now
largely obsolete.
The Morse Code was replaced as an international standard for maritime
communication by the Global Maritime Distress Safety System in 1999.
* yongtk@nstp.com.my

Peranan radio amatur membantu erat hubungan

Publication :
BM
Edition :
Date :
22/01/2006
Page Number :
22
Headline :
Peranan radio amatur membantu erat hubungan
Words :
609
Byline :
Oleh Nor Aziah Othman
Text :
RADIO amatur bukan sekadar alat komunikasi sesama ahli atau dengan
pengguna lain, tetapi turut membantu ketika kecemasan seperti tanah
runtuh, sesat di dalam hutan, banjir kilat atau nahas di darat, udara
mahu pun air, apabila komunikasi sedia ada tidak dapat digunakan.
Jika sebelum ini peralatan komunikasi seperti telefon bimbit digunakan
untuk berhubung, tetapi 'ham radio' memudahkan proses itu, khususnya di
kawasan yang tiada talian kerana ia boleh berfungsi melalui tenaga bateri
atau generator.
Memang ada kod panggilan yang sukar difahami seperti
"MEMANGGIL...9W2DZU (diulang dua kal)i atau 9W2DZU going QRT, 73...
over". Barisan ayat disulami figura seperti itu kedengaran seperti sistem
komunikasi yang lazim bagi pihak berkuasa, polis atau tentera.
Ia memang tidak akan difahami umum, kecuali mereka yang biasa dengan
pengendalian sistem komunikasi radio. Diterjemahkan, panggilan itu tadi
bermaksud - keluar dari jaluran atau frekuensi -. Ia kod panggilan atau
'callsign' yang mula dituturkan oleh pengguna radio amatur atau lebih
dikenali sebagai 'ham radio' untuk berhubung dengan orang lain.
Sebenarnya, kod panggilan yang digunakan oleh pengguna radio amatur
membawa maksud pengenalan diri seseorang apabila pengguna berkenaan ingin
memasuki talian atau berkomunikasi dengan orang lain.
Seorang kontraktor dari Seremban, Hamid Abdullah, 44, yang sudah tiga
tahun terbabit dalam dunia radio amatur, berkata sistem perhubungan itu
bermula dengan penggunaan sistem itu oleh tentera British.
"Ketika berperang, tentera British berhubung melalui cara ini untuk
urusan menyampaikan bantuan kepada mangsa peperangan atau menyalurkan
maklumat kepada pihak atasan.
"Sejak itu, penggunaan sistem berkenaan berterusan di negara ini dan
kini semakin meluas untuk berhubung ketika mengendalikan sesuatu program
atau aktiviti," katanya.
Katanya, sistem seperti itu juga digunakan dalam sukan lasak pacuan
empat roda, aktiviti yang kini mula mendapat perhatian pelbagai syarikat
dan persatuan sukan di negara ini.
"Bagaimanapun, penggunaan radio amatur di negara ini terikat dengan
pelbagai syarat dan etika," katanya, menambah pengguna sistem itu harus
menduduki peperiksaan Suruhanjaya Komunikasi dan Multimedia Malaysia
(SKMM) terlebih dulu.
"Hanya jika lulus peperiksaan berkenaan, barulah pemohon layak menerima
lesen menggunakan radio amatur dengan jumlah bayaran dikenakan mengikut
kelas sistem yang dipohon," katanya.
Kelas A dikenakan bayaran RM36 setahun manakala kelas B dikenakan
bayaran RM24 setahun, selain RM60 sebagai yuran pendaftaran.
Hamid menganggap pembabitannya dalam bidang itu lebih menjurus sebagai
hobi dalam menjalin hubungan dengan pelbagai peringkat masyarakat dalam
dan luar negara.
"Selain bertanya khabar, sistem perhubungan ini turut digunakan apabila
kami terbabit dalam pelbagai aktiviti sukan lasak, program berkaitan alam
sekitar serta program kemasyarakatan.
"Penggunaan radio amatur dapat memudahkan tugas jika menghadapi
sebarang masalah, terutama apabila berada jauh di pedalaman atau dalam
hutan," katanya.
Beliau yang juga Pengarah Urusan Nine Adventure, syarikat pengurusan
aktiviti sukan lasak, termasuk pacuan empat roda di Negeri Sembilan,
berkata radio amatur memang memberikan banyak kelebihan kepada
penggunanya.
Rakannya, Mazlan Shamsuddin, 48, yang mula berjinak dengan hobi itu,
berkata sistem perhubungan seperti itu menyeronokkan kerana dapat
berhubung dengan ramai kenalan tanpa perlu mengeluarkan belanja.
Baru-baru ini, 300 pengguna radio amatur seluruh negara berhimpun pada
majlis anjuran Rakan Radio Amatur Kuala Pilah di Perkampungan Budaya
Terachi, Negeri Sembilan untuk bertanya khabar dan membincangkan aktiviti
tahun ini.
"Kami perlu juga berjumpa dan bertentang mata walaupun dapat berbual
melalui radio amatur yang ada batasannya. Menjadi kesalahan dan boleh
dikenakan tindakan jika berbual mengenai isu sensitif.
"Pengguna radio amatur tidak boleh membincangkan isu agama, politik
atau peribadi yang menjejaskan imej seseorang secara terbuka melalui
sistem ini," katanya.
Seorang lagi ahli, Zulkifli Sulaiman, 43, berkata kemahiran menggunakan
radio amatur memberikan banyak manfaat kerana ia juga dapat disalurkan
untuk membantu pihak yang memerlukan.
"Sebelum ini, sistem perhubungan itu digunakan ketika kami diminta
memberi bantuan kecemasan menyelamatkan kumpulan remaja yang sesat di
hutan Gunung Angsi, Kuala Pilah," katanya