4-7
Voice Scrambling/Encryption
Difference between rolling and non
Difference between rolling and non
Difference between rolling and non
Difference between rolling and non----rolling types
rolling types
rolling types
rolling types
The rolling type (in fact, hopping type is used for the UT-110R) is an additional feature which provides higher
communication security. It changes the divided frequency over a specified period.
Voice scrambling function
Voice scrambling function
Voice scrambling function
Voice scrambling function
The optional voice scrambler unit provides high performance private communication between stations with the same
scrambler code. The 32 code non-rolling-type voice scrambler UT-109R and 1020 code rolling type UT-110R are
available.
Rolling Type (UT-110R)
Level
Dividing Frequency is changed
over specified period
Non-Rolling Type (UT-109R)
Level
Dividing Frequency is fixed
with programming
Original AF
300Hz
3kHz
Level
Frequency
Dividing
300Hz
3kHz
Level
Frequency
Dividing Frequency
Inverting
300Hz
3kHz
Level
Frequency
Dividing Frequency
Variable Split and Frequency Inversion
Variable Split and Frequency Inversion
Variable Split and Frequency Inversion
Variable Split and Frequency Inversion
This is the scrambling system employed in the UT-109R and UT-110R. The audio frequency band is divided at a
specified frequency (divided frequency) and high and low audio frequencies in each band are inverted. The divided
frequency is programmable with cloning.
36
300Hz
3kHz
Frequency
Dividing Frequency
Low
High
300Hz
3kHz
Frequency
Dividing Frequency
Low
High
Digital Voice
Digital Voice
Digital Voice
Digital Voice Encryption
Encryption
Encryption
Encryption Function
Function
Function
Function
The IDAS system provides a 15-bit key (about 32,000 keys) encryption for secure communication.
1 0 1 0 1 0 1 0
1 0 1 0 1 0 1 0
Key
Key
Digital Audio
Encryption
Decipher
Digital Audio
TX
RX
