Nikon CM200 service manual Osw, Pll, Ptt, Ram, Reset, Rf Pa, Rib, Rom, Rssi, Rpt/Ta, Tot

Page 66

G-ii

Glossary

 

 

 

 

 

 

 

 

 

OSW

Outbound Signalling Word: data transmitted on the control channel from the

 

 

 

central controller to the subscriber unit.

 

 

 

 

 

 

PC Board

Printed Circuit Board

 

 

 

 

 

 

PL

Private-Line® tone squelch: a continuous sub-audible tone that is transmitted

 

 

 

along with the carrier.

 

 

 

 

 

 

PLL

Phase-Locked Loop: a circuit in which an oscillator is kept in phase with a refer-

 

 

 

ence, usually after passing through a frequency divider.

 

 

 

 

 

 

PTT

Push-To-Talk: the switch located on the left side of the radio which, when

 

 

 

pressed, causes the radio to transmit.

 

 

 

 

 

 

RAM

Random Access Memory: the radio’s RAM is loaded with a copy of the

 

 

 

EEPROM data.

 

 

 

 

 

 

Registers

Short-term data-storage circuits within the microcontroller.

 

 

 

 

 

 

Repeater

Remote transmit/receive facility that retransmits received signals to improve

 

 

 

communications coverage.

 

 

 

 

 

 

RESET

Reset line: an input to the microcontroller that restarts execution.

 

 

 

 

 

 

RF PA

Radio Frequency Power Amplifier

 

 

 

 

 

 

RIB

Radio Interface Box

 

 

 

 

 

 

ROM

Read Only Memory

 

 

 

 

 

 

RSSI

Received Signal-Strength Indicator: a dc voltage proportional to the received

 

 

 

RF signal strength.

 

 

 

 

 

 

RPT/TA

Repeater/Talk-Around

 

 

 

 

 

 

Softpot

Software Potentiometer: a computer-adjustable electronic attenuator

 

 

 

 

 

 

Software

Computer programs, procedures, rules, documentation, and data pertaining to

 

 

 

the operation of a system

 

 

 

 

 

 

SPI (clock and data

Serial Peripheral Interface: how the microcontroller communicates to modules

 

 

lines)

and ICs through the CLOCK and DATA lines.

 

 

 

 

 

 

Squelch

Muting of audio circuits when received signal levels fall below a pre-determined

 

 

 

value

 

 

 

 

 

 

Standby Mode

An operating mode whereby the radio is muted but still continues to receive

 

 

 

data

 

 

 

 

 

 

System Central Con-

Main control unit of the trunked dispatch system; handles ISW and OSW mes-

 

 

troller

sages to and from subscriber units (see ISW and OSW).

 

 

 

 

 

 

System Select

The act of selecting the desired operating system with the system-select switch

 

 

 

(also, the name given to this switch).

 

 

 

 

 

 

TOT

Time-Out Timer: a timer that limits the length of a transmission.

 

 

 

 

 

 

TPL

Tone Private-Line

 

 

 

 

 

 

µC

Microcontroller

 

 

 

 

 

Image 66
Contents Commercial Series Page CM200/CM300/PM400 Radios Foreword Table of Contents Transceiver Performance Testing Glossary This page Intentionally Left Blank Safety Information Product Safety and RF Exposure ComplianceThis page is Intentionally Blank Introduction Replacement Parts Ordering Radio Model Information This page Intentionally Left Blank Chapter Preventive MaintenanceCleaning Procedures IntroductionCleaning Internal Circuit Boards and Components Safe Handling of Cmos and Ldmos DevicesDisassembling and Reassembling the Radio General Repair Procedures and Techniques GeneralParts Replacement and Substitution Rigid Circuit BoardsRadio Disassembly Detailed Volume Knob RemovalControl Head Removal 3Flat Cable Removal Top Cover Removal 5Top Cover Removal Chassis HorizontalMain Shield Removal PA Shield and DC Cable RemovalPA Clip and Main PCB Removal for Low Power Models 8PA Shield and DC Cable Removal for High Power ModelsMain PCB Removal for High Power Models 10PA Clip and Main PCB Removal for High Power ModelsDisassembly of Control Head CM200 PCBDisassembly of Control Heads CM300/PM400 12Control Head Housing Removal CM300/PM400Radio Assembly Chassis Assembly for Low Power ModelsChassis Assembly for High Power Models Control Heads Assembly Control Head FittingOption Board Installation Radio Exploded Mechanical Views and Parts Lists Radio Assembly 1-25 W ModelsItem No Description Part Number Radio Assembly 25-40 W/25-45 W Models Control Head CM200 Item no DescriptionControl Head CM300/PM400 Service Aids Motorola Part Description ApplicationTest Equipment Programming/Test Cable RKN4083 FLO830308-020Pin Configuration of FKN8113 Adapter Cable FKN8113General SetupService Monitor Test Set Power Supply Table Number TitleHSS RF Test ModeTo enter test mode display radios CMPTest Mode Test Name Communications Analyzer Radio Test Set CommentTPL DtmfPL/DPL DPLSinad This page Intentionally Left Blank CPS Programming/Flashing Setup with RIB Description Kit NumberCPS CPS Programming/Flashing Setup Ribless CPS Programming Setup with RIB with Telco ConnectorCPS Programming Setup with RIB Accessory Connector CPS Programming Setup with RIBRadio Tuning Setup Initial Test Equipment Control SettingsService Monitor Test Set Power Supply Power UP SELF-TEST Error CodesPower UP SELF-TEST VHF AccessoriesAntennas UHFAlarms and Accessories AudioCables Control StationPublic Address MountingData CES Wireless Technologies PeripheralsAccessory Connector Pin Function SCIMicrophone Connector Pin Function SCI/DTMFVHF2, 1-25 W, 146-174 MHz Low Power Radios146-174 MHz CM200/CM300/PM400 Model Chart Model DescriptionAAM50RNC9AA1A 438-370 MHz CM200/CM300/PM400 Model ChartUHF2, 1-25 W, 438-470 MHz AAM50RNF9AA1ANGeneral SpecificationsSpecification ESDTransmitter ReceiverVHF1, 25-45 W, 136-162 MHz High Power Radios136-162 MHz CM300 Model Chart VHF2, 25-45 W, 146-174 MHzAAM50RPC9AA1A 438-470 MHz CM200/CM300/PM400 Model ChartUHF2, 25-40 W, 438-470 MHz AAM50RPF9AA1AN465-495 MHz PM400 Model Chart UHF3, 25-40 W 465-495 MHzAAM50SPF9AA3AN VHF1 VHF2 UHF2 UHF3 35 ∝V @ 12.5 kHz ∝V @ 25 kHz MIL Standards MIL-STDGlossary of Terms Term DefinitionPLL ResetOSW PTTVCO VcobicVswr This page Intentionally Left Blank Page 6802966C15