Tag Archives: arq

New DigiVOX interface by KH6TY

Having followed Skip’s trail of development in digital communications modes from Digipan into FLdigi, I was not at all surprised to learn of this latest kit.

kit, board & circuit

KH6TY Digi VOX kit available now

P.34 of the March 2011 QST details his latest soundcard interface. You may recall the VOX interface he presented in the June 2009 QST, well this is a step beyond as this version needs NO battery or power connection. Read more in QST or on Skip’s site ( http://sites.google.com/site/kh6tyinterface/ )

Get `em while they’re HOT . . .

W1HKJ explains ARQ transfer time

An error correction method employed in amateur digital communication is known as Automatic Repeat reQuest (ARQ). I won’t get into those details here, but this mode can be used to ensure error-free delivery of simple messages over weak signal radio links as we often encounter in ham radio. In particular this method is available in the flarq program as part of the Narrow Band Emergency Messaging System (NBEMS) package. NBEMS provides amateur operators with the tools to operate several digital modes, regardless of Continue reading