Voice Scrambling/Encryption - Icom IC-FR5000 Series Sales Handbook

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.
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.
Original AF
Level
300Hz 3kHz
Difference between rolling and non Difference between rolling and non- - - - rolling types Difference between rolling and non Difference between rolling and non
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.
Non-Rolling Type (UT-109R)
Dividing Frequency is fixed
with programming
Level
300Hz
Dividing Frequency
Low
Digital Voice Digital Voice Encryption Digital Voice Digital Voice Encryption Function Encryption Encryption
The IDAS system provides a 15-bit key (about 32,000 keys) encryption for secure communication.
Digital Audio
1 0 1 0 1 0 1 0
Key
4-7

Voice Scrambling/Encryption

Dividing
Level
Frequency 300Hz
rolling types rolling types rolling types
3kHz Frequency
High
Function Function Function
Encryption
Dividing Frequency
3kHz Frequency
Rolling Type (UT-110R)
Level
300Hz
Dividing Frequency
Low
TX RX
Decipher
Inverting
Dividing Frequency
Level
300Hz 3kHz
Dividing Frequency is changed
over specified period
3kHz Frequency
High
Digital Audio
1 0 1 0 1 0 1 0
Key
Frequency
36