CalAmp 09002 Manual De Usuario
Interface Specification Document
Rev. -
Cellular Radio Module
CRM4250/4200
Company Confidential
Standard Communications Corp.
-5-
November 20, 2000
3.2 Physical
The host interface to the CRM4250/4200 is implemented using a 20 pin (2x10) header
connector. It provides all connections between the CRM4250/4200 and the base band
controller and/or data modem.
connector. It provides all connections between the CRM4250/4200 and the base band
controller and/or data modem.
PIN SMBOL I/O DESCRIPTION
1,2 GND
GND
Ground.
3
SPKR OUT
O
High Power Audio (Ear/Speaker)
4
LINE A
O
RX demodulated signal (+)
+/-8.0kHz deviation input will produce
1 volt p-p output signal (variable level
with 99h command) for modem use.
+/-8.0kHz deviation input will produce
1 volt p-p output signal (variable level
with 99h command) for modem use.
5
SPKR OUT
O
High Power Audio (Ringer).
6
LINE IN
I
TX modulation (+)
1 volt p-p signal,
will produce +/-8.0kHz deviation.
Single-ended input (600 ohm)
1 volt p-p signal,
will produce +/-8.0kHz deviation.
Single-ended input (600 ohm)
7
LINE B
O
Fixed -18dBm modem audio output.
8
MIC
I
Microphone audio input. Can be
directly connected to 600 ohm
impedance microphone or Electric
type microphone.
directly connected to 600 ohm
impedance microphone or Electric
type microphone.
9,10 VCC PWR
(CRM4200 ONLY) +5 VDC supply input.
Requires a minimum available current of
750mA. (DO NOT CONNECT IF CRM4250)
750mA. (DO NOT CONNECT IF CRM4250)
11 reserved
-
Do not connect.
12 RSSI
O
Receive signal strength indication.
Varying DC voltage output based on
received signal strength.
Varying DC voltage output based on
received signal strength.
13,14 VCC
PWR
(CRM4250 ONLY) +12VDC supply input
Requires a minimum available current of
1.2 amps. (DO NOT CONNECT IF CRM4200)
Requires a minimum available current of
1.2 amps. (DO NOT CONNECT IF CRM4200)