2ContentsProducts Covered in This Manual ............................................................ 34050 HF SDR Transceiver Digital Voice Products ............................... 32050 HF Transceiver Digital Voice Products ...................................... 3PRC-2090 HF Transceiver Digital Voice Products ............................... 4Introduction ............................................................................................ 5Operating with Digital Voice ................................................................... 6Encryption ............................................................................................... 8Barrett Communications Key Management Software Quick Start Guide (2000& 4000 Series Transceivers) ..................................................................... 91. Connect the transceiver to a PC ................................................. 102. Install the Key Management Software (KMS) ............................. 133. Set transceiver to “SDV/DV Programming Mode” (4000 series) . 144. Generate the keys ...................................................................... 165. Exporting the Keys ..................................................................... 196. Loading the Keys ........................................................................ 20Selecting Keys in 4000 Series Transceivers ............................................. 26Secure Digital Voice/Data Key......................................................... 26Enable Digital and Secure Voice in 4000 Series Transceivers .................. 27Selecting Keys in the 2000 Series Transceivers ....................................... 28Enabling Scrambler Mode for 2000 Series Transceivers ......................... 29To Disable Scrambler Mode ............................................................ 29Making a Digital/Secure Digital Voice Call ............................................. 31Limited 3 Year Warranty Statement ....................................................... 32Contact Details............................................................................... 33