Connectors And Pin Assignment Of The Radio; Transceiver Rear Side - Pin Function - Motorola MTM800 Installation Manual

INSTALLATION

Connectors and Pin Assignment of the Radio

Transceiver Rear Side - Pin Function

This section gives a description of the Accessory Connector pin functions.
Pin Function
1 EXTERNAL
SPEAKER -
2 EXTERNAL MIC
AUDIO
3 EXTERNAL PTT
4 EXTERNAL ALARM
5 TX_AUDIO
6 KEYFAIL/FLASH
7 ANALOG GROUND
8 DIGITAL_GROUND
9 EMERGENCY
10 IGNITION
MTM800 Enhanced Mobile Terminal Installation Manual
Figure 26 Location of Accessory Connector - Rear Side
The accessory connections shown are not compatible to
some other models of Motorola radios. Check the
appropriate accessory or technical manual for further
information.
Table 10 20-Pin Accessory Connector
Speaker - and Speaker + (Pin 16) are used to connect an external speaker. The audio
PA is a bridge amplifier with a minimum load resistance of 3.2 ohms.
External-, Emergency-, or Hot-Microphone; depends on CPS programming. This
microphone signal is independent of the microphone signal on the microphone
connector. The DC impedance is 660 ohms and the AC impedance is 560 ohms.
This is a digital input to trigger external PTT; active low; non active high
This is a digital output for External Alarm/Fault Indication; active low; open collector
with 4k7 Ohms pull up to B+.
This input is intended for injecting signals into the transmit path. Input impedance > 10
k Ohms;
Input level = 775mV
RMS
This line supports the encryption module and the flash mode.
Service Aids: 12 volts at this pin during power up/on brings the radio into the flash
mode.
Analogue Ground (the same as pin 8)
Digital Ground (the same as pin 7)
To activate this functionality the pin has to be connected to ground. This will turn on the
radio.
Connecting this pin to the ignition line of the vehicle that will automatically turn on the
radio if ignition of the vehicle is turned on. High active.
20 2
19
1
Description
59
4 6 8 10 12 14 16 18
3 5 7 9 11 13
15 17
Accessory Connector
*Note the location of Pin 1