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• 25 kHz channels are called Wide Band channels
• VINSON COMSEC most commonly used.
• Non-secure SATCOM is not permitted
• Voice quality similar to telephone or LOS radio
• 33.6 MHz is the common offset between the uplink and
downlink with the uplink being the higher
25 kHz Dedicated SATCOM
Characteristics
• 5 kHz channels are called Narrow Band channels
• ANDVT COMSEC most commonly used
• Non-secure SATCOM is not permitted
• Voice quality is poor due to slower data rate of LPC-10
encoding used by ANDVT
• MELP encoding makes ANDVT COMSEC communications
more understandable
5 kHz Dedicated SATCOM
Characteristics
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