CQ

ISS: Information Sending Station

IRS: Information Receiving Station

A CQ frame for sending a broadcast like CQ, so other station can send my messages and data if they hear me

ISS->IRS:3x CQ frame

CQ Frame

frametype ISS callsign ISS gridsquare empty
1 Byte 6Bytes 6 Bytes -
200 Callsign as str Gridsquare as str -