The ROS software FHSS Mode is a new HF digital mode based on FHSS-CDMA modulation
It uses 16 different CDMA codes with 1.8 seconds per Hop.
Every transmission uses a different CDMA code randomly chosen.
More information - http://rosmodem.wordpress.com/2014/05/16/new-digital-mode-fhss-mode/
ROS Weak Signal Radio Chat and Opera Weak signal QRSS Beacon can be downloaded from http://rosmodem.wordpress.com/