Motorola GM Series Service Manual

Notes For All Schematics and Circuit Boards 2-7
IN 5V RF REG Supply Voltage for 5V Regulator in RF Section
INT KP COL Internal Keypad Matrix Column Signal
INT KP ROW Internal Keypad Matrix Row Signal
INT MIC Internal (from Control Head) Microphone Input
INT SWB Internal Switched 13.2V Supply Voltage
INT SWB+ Internal Switched 13.2V Supply Voltage
IRQ Interrupt Request from Control Head
K9V1 9.1V in Transmit Mode
KEYPAD ID Keypad Identification Line
LCD A0 LCD Control / Display Data Select
LCD CS LCD Chip Select
LCD DATA LCD Data Lines
LCD E RD LCD Enable Read
LCD RW WR LCD Read Write Control
LED CNTRL LED Control Lines
LED GREEN Green LED Control
LED RED Red LED Control
LED YELLOW Yellow LED Control
LOCK Lock Detect Signal from Synthesizer
LSIO Low Speed Clock In / Data Out
LVZIF CS LVZIF Chip Select (not used)
MIC Microphone Input
MISO Serial Peripheral Interface Receive Line
MODIN Modulation Signal into the Synthesizer
MOSBIAS 2 PA Bias Voltage for second Stage
MOSBIAS 3 PA Bias Voltage for third Stage
NOISE BLNKR Noise Blanker Enable (Low Band only)
ON OFF CONTROL Service Request Line from Control Head / Manual Switching On
of the Radio's Voltage Regulators
ON OFF SENSE (Control Head)On Off Sense Line to Control Head *P
ON OFF SENSE (Controller) Service Request Line from Control Head
OPT CS Option Board Chip Select
OPT PTT PTT from Option Board
PA PWR SET ASFIC Output Voltage to set the Transmitter Power
PA SWB Switches Supply Voltage for PA Current Control Circuitry
PASUPVLTG 13.2 V Supply Voltage of the Transmitter PA
PCIC MOSBIAS 1 PA Bias Voltage for first Stage
PRESC Prescaler Signal from VCO to Synthesizer
PTT IRDEC Microphone PTT Input
PTT IRDECODER Microphone PTT Input
R W Read Write Signal for RAM / Flash

Motorola GM Series Specifications

General

Channels	16
Waterproof	No
Frequency Range	VHF: 136-174 MHz
Signaling	DTMF, MDC1200
Dimensions	56 x 175 x 218 mm