mal hamilton wrote:
I have been looking around the
various HF bands for NON MORSE acty and find that the old RTTY is the
most prolific mode in use, it looks like the use of other data modes
are rare, perhaps more suited to V/UHF EME work etc.
g3kev
Hello Mal., LF group
i do not agree with you. I guess if you had taken more time for
your watch of HF bands your conclusions would be different.
it is sometimes useful to extend time basis for making more reliable
"averages " , hi. in my opinion it is PSK31 as #1 these days.
Of course from historical reasons rtty dominated in ether for
many years but the last decade has changed it when DSP
techniques came into play along with PC's in almost every house etc...
. btw, rtty as you know is based on a Baudot code known before
radio waves were 'discovered' and used to carry information . the
popularity of rtty is based on the selfsynchronizing properties of the
7bit Baudod code ( 1 start bit one stop bit + 5 bits for
letters/nonletters dot, hyphen....) it is not arq mode so you can
listen to it anytime etc..
like CW which is also itself selfsynchronizing i.e you know very well
when it is started stopped etc... PSK works the same way - from all
so called 'digital' modes it is like a live qso with its speed
similar to CW and so one and the selfsynchronizing properties due to
the varicode of G3PLX
are great ! that is why , in my opinion psk31 wins these days. my
first psk qso was almost 10 years ago and i work mainly psk on HF
bands tiill now.
I do think it is the most popular digi mode at present.
Dear Mal, here is one issue more ...
i do observe the ongoing discussion between you and others concerning
the CW vs other modes. in a moment i will add my comment to this
but in the form of example of one of my psk qso which i will
remember forever. it was in the early 2000's when the prop was not
that bad
and i had regular(everyday basis) qso with US stations at the
evenings on 14 Mhz . it was an american callsign - i do not remember
it ( but can look into my logbook if you want) but what i do remember
he was 86 years old , all time ( both his work and his hobby) a CW
operator but by that time he was deaf, completely deaf and he told
me" Peter, i can not use my EARS i am a deaf person i can not use CW
anymore but i can use my EYES and due to psk i still can enjoy my
radiohobby" - please, excuse my english but the sense of the words of
this old man is obvious.
so at least two points are emerging...
1. we have ears we have eyes = both human senses can be used to
'read' the information which modulates the radiowave
2. the dsp techniiques are more superior to CW these days as far as
S/N is concerned
again, HNY 2009 , yours,
peter, sq7mpj
qth: lodz, poland /jo91rs/
|
|
