Midland Radio SP-410 - Manual (Page 25)

SP-400 Series User’s Guide
Selecting VOX sensitivity
When VOX is activated you may toggle between low and high
VOX sensitivity by pressing the lower, then upper function
buttons, and releasing both within two seconds. A high beep will
sound when high sensitivity is selected and a low beep will
sound when low sensitivity is selected.
Using the scrambler
The SP-410 / SP-420 / SP-430 / SP-440 transceivers feature a
built-in voice inversion scrambler. The scrambler function must
have been enabled by your dealer or communications
coordinator before it may be activated. If enabled you may
activate your scrambler by holding the lower function button
pressed while you turn on the radio. A high pitched beep will
sound when the scrambler is activated. While the scrambler is
turned on, the status LED will blink amber twice every five
seconds.

All SP-400 series radios receiving the scrambled
transmission must be also have their scrambler enabled
for the conversation to be intelligible. In other words, for
intelligible communication, all radios must have their
scrambler on or all radios must have their scrambler off.

The voice inversion scrambler built-in the transceivers is
a relatively simple form of encryption and does not
guarantee communication security.
Editing your scan list
The SP-400 series radios allow you to edit your scan list before
scan is turned on. Any channels programmed in the radio which
are not in the programmed default scan list may be temporarily
added to the scan list. Additionally, any channels in the
programmed default scan list, except the programmed priority
channel, may be temporarily removed from the scan list.

The programmed priority channel can not be deleted
from the scan list.
© 2005, Midland Radio Corporation
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