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BARRETT PRC-4090 TACTICAL HF SDR TRANSCEIVER - ADVANCED OPERATION
Digital Voice (Encoding)
Encoding
on
Encoding
off
Encoding can improve the reliability of commu-
nications over noisy channels where reception
of analogue voice can be very poor. Poor voice
quality can be improved mark edly by the use of
digital voice modules to the point where barely
usable frequencies are made clear. Secure Dig-
ital Voice allows users to encrypt their communications over HF therefore pro-
viding a secure HF network.
Both Digital Voice and Secure Digital Voice capability can be utilised in Barrett
4000 and 2000 series HF Transceivers using Barrett digital voice modules which
are designated as:
DV
Digital Voice module with no encryption
SDV-56 Secure Digital Voice module with DES 56 encryption
(No export licence required)
SDV-256 Secure Digital Voice module with AES 256 encryption
(Export licence required)
Signal-to-noise ratio conditions can change during communications between
HF stations. The digital voice modules have auto baud capabilities which auto-
matically adjust baud rates up or down whilst communicating between the
transceivers allowing the users to transmit and receive signals with optimal
voice clarity.
For more information on Digital Voice, please consult the Barrett HF Radio Digi-
tal Voice and Secure Digital Voice Operating Manual (P/N BCM40504).