Ericsson LBI-31629B - Manuals

Page 2 - SPECIFICATIONS; SYSTEM; TABLE OF CONTENTS

Copyright © April 1987, General Electric Company SPECIFICATIONS SYSTEM Frequency Range FCC Identification Number 136 MHz to 160 MHz AXA9WNTR-145-A 150 MHz to 174 MHz AXA9WNTR-145-B Frequency Stability 5 PPM Battery Drain (at 7.5 VDC)Standby 65 Milliamperes Receiver (Rated Audio) 195 Milliamperes Tra...

Page 3 - DESCRIPTION; Ericsson GE’s M-PD System Personal Radio is a high-; COMBINATION NOMENCLATURE; PD

DESCRIPTION Ericsson GE’s M-PD System Personal Radio is a high- quality, high-performance, two-way, FM, communications unitconsisting of a transmit/receive circuit with a frequency syn-thesizer controlled by a microprocessor. The M-PD PersonalRadio is ideal for use in public services by providing th...

Page 4 - OPERATION

• Channel Busy Lock Out: Personality information in-cludes the capability to prevent the transmitter from op-erating on a channel where carrier activity is present.The "Channel Busy" indicator (BSY) is active duringthis time. • Automatic/Manual Power Levels: The desired powerlevel on each ch...

Page 6 - SYSTEM ANALYSIS; Display Board: carries LCD displays; RADIO BOARD; Transmit Circuits

2. Use the DTMF keypad or use the Recall TelephoneNumber key (RCL) to enter the digits of the tele-phone number. 3. Press the secondary key and then press theSEND key. An optional tone (sidetone) may beheard as each digit is transmitted. 4. When someone answers, press the PTT bar andspeak directly i...

Page 7 - Receive Circuit

Q202. The RF power output from Pin 2 of the TX-Ampmodule A201 is connected through a resistor attenuator toPin 1 of the PA module where it is applied to the input of theRF power amplifier stages. The RF power amplifier stagesamplify the input from the TX-Amp module to a typicalpower output level of ...

Page 8 - Synthesizer Circuit

Synthesizer Circuit The Synthesizer circuit contains Phase-Lock-loop mod- ule (PLL) A102, VCTCXO Reference Oscillator moduleA103, TX/RX Voltage Controlled Oscillator module (VCO)A106 and a Low Pass Filter amplifier (LPF). Refer to Fig-ure 9 - Synthesizer. The VCO used to generate the receiveand tran...

Page 9 - CONTROLLER CIRCUIT

CONTROLLER CIRCUIT This controller circuit consists of control circuits and audio circuits. Physically, this circuit consists of three cir-cuit boards as follows: • Control Board • Signaling Board • LCD Board Control Board The Control board consists of the following circuits (see Figure 2): • CMOS M...

Page 10 - MAINTENANCE

Charger combinations for charging the battery packs are available with charge times of 1 hour, 3 hours and 16 hours. Acombination can be a single unit desk or a vehicular charger. Itcan also be a wall mounted multiple charger. Charge Level A fully charged battery pack should provide a terminal volta...

Page 13 - INTRINSICALLY SAFE USAGE; BATTERIES

INTRINSICALLY SAFE USAGE Selected personal radios with appropriate factory installed F4 Options are certified as Intrinsically Safe by the FactoryMutual Research Corporation for use in Class 1, Division 1 or2, hazardous locations in the presence of Groups C and D at-mospheres; Non-incendive Class 1,...

Page 14 - PARTS LIST; NOTE

1. The battery is continuously overcharged for long peri-ods of time. 2. A regularly performed duty cycle which allows thebattery to expend only a limited portion of its capac-ity. If the nickel-cadmium battery is only sparingly or seldom used and is left on continuous charge for one or two months a...

Page 15 - INTERCONNECTION DIAGRAM

Page 17 - SCHEMATIC DIAGRAM

SCHEMATIC DIAGRAM RADIO SCHEMATIC DIAGRAMWITH TYPICAL VOLTAGE A4WE03739/40 LBI-31629 16

Page 24 - MECHANICAL PARTS BREAKDOWN; SYSTEM TYPE

MECHANICAL PARTS BREAKDOWN M-PD EXPLODED VIEW SYSTEM TYPE A1WL09006 LBI-31629 23