Persisted across restarts and sent with all transmissions.
Center audio carrier frequency for COFDM transmission.
Modulation scheme and symbol mapping rate for transmission and reception.
Displays callsign visibly as sub-carrier patterns on waterfalls and spectrum analyzers like Android Rattlegram.
Used for live feedback meter, COFDM packet decoding, and CW ID detection.
Used when transmitting Rattlegram acoustic audio tones.