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Packet-Based Auto-Descramble:
If this box is checked, the receive mode of the scrambler is
automatically switched between scramble and clear. If the unit receives a leading FMP packet without
GPS indicating that the transmitter is in scramble mode, then it will automatically descramble the
transmission. The receive mode will go back to clear when the transmission ends which is when COR
or VOX goes inactive. The state of the mode switch will have no bearing on the receive mode of the
scrambler. For this feature to work, units must have the Leading FMP ANI enabled and the Enable CAD
Decode box must be checked.
Auto-Switch TX Mode to Scramble:
If Packet-Based Auto-Descramble is enabled, checking this box
will also cause the transmit mode to be switched to scramble when automatic descrambling takes
place. This is to ensure that a conversation that is stated in scramble mode remains in scramble mode
even if the user receiving the initial transmission fails to switch their transmit mode to scramble. Unlike
the receive mode, the transmit mode does not switch to clear automatically. The user must manually
switch the mode to clear if transmitting in the clear mode is desired after an auto-switch.
Tone-Based Auto-Descramble:
If automatic descrambling is desired Midian recommends using the
Packet-Based Auto-Descramble, as the tone based auto-descramble takes up about 1/3 of the voice
band and results in lower audio quality. The Tone-Based Auto-Descramble is only available in the VS-
1200-SM1G and cannot be used with VOX or ANI muting.
