Output Functions - Motorola Commercial Series Selling Manual

Accessory Connector
8.2

Output Functions

8.2.1 Carrier Detect
The output is asserted whenever carrier is detected and is de-asserted if no carrier is present.
The output is de-asserted if the radio is in TX mode.
8.2.2 PL/DPL Detect
The output is asserted whenever the correct PL is detected.
If PL override is disabled, the output is de-asserted when the correct PL is lost.
If PL override is enabled, the output remains asserted for the AutoReset time after the correct PL is
lost. This is particularly useful when the mobile is used as a base station and needs to remain active
during short losses of RF or PL, eg when the signal is lost for a short moment, or a 5 tone sequence
is sent (many earlier radios cannot encode PL and 5 tone simultaneously).
The output is de-asserted if the radio is in TX mode.
8.2.3 Radio Busy
This output is asserted whenever carrier is detected, or the radio is in TX mode.
8.2.4 External Alarm
If the radio has external alarm enabled and a telegram is decoded that has external alarm enable,
the output is asserted. This output can be used to energise a relay, etc, that will sound the car's horn
and, or flash the lights.
The output is de-asserted when any button is pressed, the radio is stunned or the external alarm
timer expires. The timer is reset each time the output is asserted. For instance, if the external alarm
duration is 5 seconds, and two decodes are received 1 second apart, the alarm starts on receipt of
the first decode, and stop 6 seconds later (i.e., 5 seconds after the second decode).
External Alarm cannot be enabled on decoders set for Stun, Ack1 ringing, Ack1 Answer or Silent
Interrogate.
NOTE This feature is not legal in all countries.
Benefits
Enables the radio user to be aware of an incoming call when out of, but near to, the vehicle.
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