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a digital code is transmitted
instead of an audio tone. Like
CTCSS, DCS allows multiple
users to share a single radio
frequency without hearing each
other’s transmissions. In your
PRO-96 scanner, the DCS feature
canbeusedtoblockthereception
of transmissions on a shared
channel to only those that use the
DCS tone that you have specified.
DCS mode also features a Code
Search setting that allows you to
instantly display and store
unknown codes into the channel
memory. DCS data can
sometimes be heard as a low
“purring” sound in the background
of a voice transmission. Some
DCS systems transmit a special
“turn off code” at the end of each
transmission. The turn off code
causes a properly equipped
receiver to mute before the
transmission ends, eliminating the
“squelch tail” burst of noise the
commonly occurs when the signal
is lost. DCS turn off code
performance is typically more
immune to weak signals than
CTCSS.
Motorola/APCO-25
Trunking Mode (MO)
You can set your scanner so it
decodes the talkgroup IDs used
with Motorola and APCO-25
trunking systems and follows
talkgroup calls in the trunking
system. This setting is called the
Motorola mode.
Motorola systems are trunking
systems used primarily by
business and public safety