ATV

摘要

DATV is in the news again. Dr Uwe E Kraus, DJ8DW, and his team have finished the development work on GMSK and now have working modules. The two modules produce a 70cm signal with a bandwidth of 2MHz. and were demonstrated live at Friedrichshafen. The 70cm DATV link was set up on the German side of Lake Constance to transmit pictures on 70cm using GMSK modulation and was received on Mount Pfaender some 20km away. This link was the relayed again using DATV, but this time on 23cm using QPSK into the exhibition at Friedrichshafen, a distance of 38km. After lunch the GMSK link was relocated to Gehenberg for another demonstration of GMSK over a distance of 38km.