Technical informations - Systems

HELL / HELLSCREIBER
Antico modo di trasmissione messo a punto dal Dr.Hell di Kiel (Germania) Ora questo sistema Ŕ utilizzato esclusivamente dai radioamatori; parecchi anni fa' era in uso e anche da stazioni cinesi. Vi sono due modalitÓ; sincrona e asincrona e due velocitÓ tipiche 122.5 e 250 Baud.

HELLSCREIBER
 FAX-like mode in that it was used to send pictures but works more like common RTTY. The Siemans systems used start/stop signalling (FSK) and the Field HELL unit was semi-synchronous. The system was used by the Chinese Internal Press up until about 1993 but is now used by European amateurs on 80m and 40m.



 
HELLSCREIBER  HELLSCREIBER