Motorola 6816101H01-A service manual Glossary of Terms, Term Definition, Pll, Ptt, Reset

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GLOSSARY OF TERMS

Term

Definition

Busy Channel

If BCLO is activated, the radio will check for channel activity before transmit-

Lockout (BCLO)

ting. If activity is detected, transmission is prohibited. For carrier squelch mode,

 

radio will not transmit, if it is receiving carrier. For coded squelch mode, it will

 

not transmit, if it is receiving carrier with different PL/DPL code.

Carrier

An electromagnetic signal that is transmitted on a selected frequency for the

 

purpose of carrying voice or data transmissions along with it. Carrier can then

 

be received by all radios listening on that frequency.

CD

Compact Disk.

Channel

A single path separated by frequency or time divisions used for transmitting

 

and/or receiving voice and/or data.

Codeplug

A solid-state chip inside a radio where the radio‟s personality data is stored.

CPS

Acronym for Customer Programming Software. Licensed Motorola software

 

used to program two-way radios with a unique set of features.

Frequency

(a) The location of the center of a channel of operation in the radio spectrum.

 

Measured in Megahertz (MHz).

 

(b) A computer speed. Measured in Megahertz (MHz).

Model Number

The model number identifies the type of radio. This information is stored in the

 

radio‟s codeplug.

Normal Scan

For Normal Scan, the radio assigns equal priority to all members in the Scan

 

List selected for the current channel. When the radio is scanning a Scan List

 

(Active Scan), all scan list members (including the Home Channel) will be allocated

 

equal time to be scanned. For example, if the Home Channel is H1, and

 

the Scan List Members are Nn, then the scanning sequence is: N1, N2, N3, ...,

 

H1, N1, N2, ..., etc.

PLL

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

 

erence, usually after passing through a frequency divider.

Priority Scan

For Priority Scan, the radio assigns the highest priority to the channel defined

 

in the CPS as Priority Channel. When the radio is scanning a Scan List (Active

 

Scan), 50% of the scans are targeted at the Priority Channel. For example, if

 

the Priority Channel is P1, and the non-priority Scan List Members are Nn, then

 

the scanning sequence is: P1, N1, P1, N2, P1, N3, P1, N4, P1, N5, etc.

Program

The transfer of CPS information from the computer‟s temporary memory (RAM)

 

to the radio.

PTT

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

 

pressed, causes the radio to transmit.

RESET

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

Reverse Burst /

Causes a Tone Private Line (TPL) or Digital Private Line (DPL) code to be

Turn Off Code

transmitted at the end of a transmission - once PTT is released, and while op-

 

erating on the current channel. This sub-audible tone causes the receiving ra-

 

dio to mute its speaker before loss of a carrier is detected. Muting the speaker

 

eliminates unwanted noise (squelch tail) during loss of carrier detection.

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Contents Mag One by Motorola Radio Series Computer Software Copyrights Document History Page Federal Communication Commission FCC Regulations Safety InformationGuidelines Compliance with RF Exposure StandardsElectromagnetic Interference/Compatibility Use of communication devices while driving Operational WarningsHearing Aids Other Medical DevicesOperational Cautions for Intrinsic Safe Equipment Operational CautionsIntrinsically Safe Radio Information Repair Do Not Substitute Options or AccessoriesTable of Contents Glossary of Terms Radio ProgrammingScope of Manual Warranty and Service SupportWarranty Period and Return Instructions IntroductionFurther Assistance From Motorola After Warranty PeriodPiece Parts Technical SupportUnit Level Radio Model InformationCPS Radio FeaturesIntroduction MaintenancePreventive Maintenance Cleaning ProceduresSafe Handling of Cmos and Ldmos Devices Repair Procedures and Techniques General Disassembling and Reassembling the Radio General Front Cover from Chassis Disassembly Radio Disassembly DetailedRadio Disassembly Detailed Speaker Wire Radio Disassembly Detailed PC Board Reassembly Radio Reassembly DetailedPC Board Disassembly Chassis and Front Cover Reassembly Radio Reassembly Detailed Speaker Connector Part Name Qty Mechanical View and Parts ListExploded View and Parts List ReferenceReference Part Name Qty Reference Part Name Qty PMUD2221A PMNN4071RCDescription Application Service AidsMotorola Part Programming Cable PMDN4043R Motorola Description Characteristics ApplicationTest Equipment Test Box PMDN4040R Cloning Cable PMDN4060R otesRadio Tuning Tuning Frequency Hardware Tuning Setup and ProcedureGround Contact Finger R425 R426 R216 FL701 R215 TP1 Subtone Level 42 ± 0.02kHz 96 ± 0.02kHz R425 R426 C722 Page Programming Your Radio Radio ProgrammingKit Number CPS ProgrammingCPS Programming Setup Factory ResetFactory Reset Accessories Publications Audio AccessoriesService Kits LAH84JDC8AA4AN Model Chart and Test SpecificationVHF Band 1 Information 136-150 MHz A8 136-150 MHz VHF Model DescriptionReceiver SpecificationsGeneral TransmitterLAH84KDC8AA4AN VHF Band 2 Information 150 174 MHz A8 150-174 MHz VHFSpecifications LAH84QCC8AA4AN UHF Band 1 Information 403-425MHz A8 403-425 MHz UHFUHF UHF Band 2 Information 450 470MHz A8 450-470 MHz UHF Specifications PMAE4028A UHF Band 4 Information 490 512 MHz A8 490-512 MHz UHFLAH84TCC8AA4AN Specifications PLL ResetGlossary of Terms Term DefinitionVHF ROMTPL UHF
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