Voice Scrambling System - Icom IC-F4062S Sales Handbook

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Voice scrambling methods
The built-in inversion type voice scrambler provides secure conversation. When a more secure system is required, the
32 code non-rolling-type voice scrambler UT-109R and 1020 code rolling type UT-110R are available as an option.
Built-in inversion type voice scrambler
This is the scrambling system which is built-in inversion type voice scrambler inverts the high and low audio
frequencies.
Level
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-rolling types
The rolling type (in fact, hopping type is used for the UT-110) 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
Voice Scrambling Systems
Original AF
300Hz 3kHz Frequency
Dividing
Level
Frequency 300Hz
3kHz Frequency
High
Inverted AF
Level
300Hz
Dividing Frequency
3kHz Frequency
Rolling Type (UT-110R)‫‏‬
Level
300Hz
Dividing Frequency
Low
3kHz Frequency
Inverting
Dividing Frequency
Level
300Hz 3kHz
Dividing Frequency is changed
over specified period
3kHz Frequency
High
Frequency
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