Motorola Cleartone CM5000 Installation Manual page 42

42
Pin Function
11 RX_AUDIO
12 AUDIO_PA_ENABLE
13 SWB +
14 HOOK
15 SCI_DTR
16 SPEAKER +
17 * SCI_CTS
18 * SCI_RTS
19 * SCI_RXD
20 * SCI_TXD
CM5000 TETRA Mobile Repeater/Gateway Installation Manual
Table 6 20-Pin Accessory Connector
Description
This is the received RX signal. Output impedance approximate 600 Ohms; unsymmet-
rical;
output level = 775mV
This is a digital input. High level or pin open enables the audio PA; Low level disables
the audio PA.
This voltage is available when the radio is switched on.
The max. current is 1.0A w/o GPS board and 0.8A with GPS board mounted.
This is a high active digital input.
Low = on hook; High = off hook
Data Terminal Ready, used for clock input for high speed flashing. Reserved for Ser-
vice Aids.
Positive output of radio's audio PA (see Pin 1).
Radio OUTPUT: Clear To Send (reserved for service aids)
Radio INPUT: Request To Send (reserved for service aids)
Radio OUTPUT: Receive Data (reserved for service aids)
Radio INPUT: Transmit Data (reserved for service aids)
RMS
The 4-wire 3 Volts SCI interface on the accessory connec-
tor (pins 17 -20) can only be used for flashing of radio
firmware and programming software features. It can NOT
be used for communication during normal radio opera-
tion.
INSTALLATION