Hello Mike,

In theory there is no need for these 'gaps', but a series of tests (mainly
conducted by DF8ZR, DF6NM and me) showed that these small 'gaps' had 2
advantages :
1. It eases the reading of characters with a series of dots or dashes (eg.
O, S, J, 5 etc...)
2. It gives the TX a 'break' (reduces the 'on/off' ratio) during long
characters

The disadvantage is that is slows down the speed by 33% (but still leaves
an average speed increase of about 225% compared to QRSS).

In my opinion these 'gaps' should not be obligatory, so you can leave them
out if you wish so.

73, Rik  ON7YD


At 18:25 9/05/00 +0100, G3XDV wrote:

Rik,

Have I misunderstood, or are you saying there is a gap between each dot and each dash? I thought there was no need to do this as the frequency determines whether an element is a dot or dash so a dot three times the dot lenght must be three consecutive dots.

Probably me being dumb.


Mike, G3XDV (IO91VT)
http://www.dennison.demon.co.uk/activity.htm