[UK-CONTEST] 80m CC Data night

[g3ory at lineone.net]

There is another point that has not been mentioned and that is the issue
of receiver synchronization on RTTY.

If the receiving station goes to receive AFTER the transmission has started
then the receiver will detect the first SPACE that comes along and think
this is the start of a full character when it may in fact be in the middle
of a character. Using a 1.5 unit stop MARK means that it will be fairly
soon that the receiver commences each character on the correct start SPACE.
 However, a few characters will be lost.

Even when character sync has been obtained the receiver may be in FIGS when
it should be in LTRS. Fortunately callsigns change from one to the other
at least twice, so only one or two more characters may be lost.

So, the clever operator sends a few redundant characters PRIOR to sending
any key information to give the receiver time to achieve sync. Have you
noticed how G3CWI uses RYRYRY quite a lot to buffer important information?

The moral is that it is possible to be too slick for your own good. Rather
like all that stuff about abbreviated numbers in serials that appeared last
week, the conclusion then was that being too 'clever' ends up with a slower
QSO rate for you due to requests for repeats or busted QSOs on checking.

73


Bob

>-- Original Message --
>From: "g3rir demon" <g3rir at ackerley24.demon.co.uk>
>To: "'Phil Cooper'" <pcooper at guernsey.net>,
>	<uk-contest at contesting.com>
>Subject: RE: [UK-CONTEST] 80m CC Data night
>Date: Thu, 10 Jun 2004 07:29:29 +0100
>Cc: 
>
>
>I cannot entirely agree with Phil about answering CQ's. With SSB and CW
>the method suggested by Phil of only sending "de G9XXX" to respond to a
>CQ works nearly all the time but not all the time. 
>
>When there is QRM there is often confusion of who is working who. This
>problem is far worse on RTTY, at least on CC 80, as there are many
>novice RTTY operators (like me 40 years licenced but it has taken CC 80
>to get me on RTTY) and calling exactly on frequency is as yet something
>of a lottery thus increasing the potential confusion.
>
>Clearly Phil has vastly more RTTY experience than me and most of the
>others on CC80 so I suspect his suggested method works in most RTTY
>contests but I contend CC80 is different!
>
>73 all de Neil, G3RIR 
>
>-----Original Message-----
>From: uk-contest-bounces at contesting.com
>[mailto:uk-contest-bounces at contesting.com] On Behalf Of Phil Cooper
>Sent: 09 June 2004 18:00
>To: uk-contest at contesting.com
>Subject: [UK-CONTEST] 80m CC Data night
>
>Hi all,
>
>Not a particularly high-scoring night, but the band was in great shape!
>I
>managed 38 contacts.
>
>One point to remember when answering a CQ call in a contest is not to
>send
>the other guy's call, but just send DE yourcall yourcall.
>When I was CQ'ing, I had a lot of GU0SUP GU0SUP GU0SUP DE G3XXX G3XXX
>G3XXX
>which is a complete waste of time.
>Far better to just send DE G3XXX G3XXX if conditions are good (which
>they
>were) or maybe send your call 3 times if conditions are not so good.
>
>If someone asks you to repeat the serial number, it is not advisable to
>simply send the same buffer twice!
>Have a buffer set that is just the serial number once, and then hit that
>F-key as many times as needed. This is far more effective.
>
>I know many of you are new to RTTY, but it is fun, and is a very
>"friendly"
>mode once you get going. For those of you who wish to have a bit more
>fun,
>this weekend is the ANARTS RTTY contest.
>You can find a link to the rules, plus more info at
>www.rttycontesting.com
>You get points based on distance, so work all the DX you can! Single ops
>are
>only allowed to operate 30 of the 48 hours.
>
>See you there!
>73 de Phil GU0SUP
>
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