SPEECH INVERSION SCRAMBLER- Protects users against casual listeners
The voice inversion scramblers can be installed into virtually any modelof two-way radio and into most any type of radio system.
This scrambler is user-programmable for up to 4 inversionfrequencies from a list of 37 inversion frequencies. The VPU15 is theonly inversion scrambler that offers automatic detection of scramble/clearaudio when used with other VPU-15 scramblers. The voice inversion scramblers provide superb voicequality and speaker recognition between scrambled and clear audio.
The VPU-15 can be programmed to automaticallydetect scrambled and clear conversations when used with other VPU-15scramblers. This eliminates the need for the receiving radio s operator tomanually toggle the mode of the voice scrambler.
VPU-15: General Specifications
Operating Voltage Varies on Module
Operating Current < 9 mA
Operating Temperature -30 to +60 C
RX Input Level Varies on Module
TX Input Level Varies on Module
VPU-15: Security Specifications
Inversion Frequency Range 2340-3807 Hz
# of Inversion Codes 4
Export Controls NLR EAR99
VPU-15: Kryptic Signaling Specifications
Emergency ANI Yes
Location 100 (10 x 10 grid)
Selective Calling Yes
OTAR of Security Keys Yes
Radio Kill Yes
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