Motorola MCX600E Service manual

Issue: December 1999

MCX600E

Mobile Radio

Service Manual

www.myradio168.net

Computer Software Copyrights

The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for

Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program. Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant, either directly or by implication, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive royalty-free license to use that arises by operation of law in the sale of a product.

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Safety Information

SAFETY INFORMATION

Read this information before using your radio.

SAFE AND EFFICIENT OPERATION OF MOTOROLA TWO-WAY RADIOS

This document provides information and instructions for the safe and efficient operation of Motorola Portable and

Mobile Two-Way Radios. The information provided in this document supersedes the general safety information contained in user guides published prior to 1 January 1998.

For information regarding radio use in hazardous areas, please refer to the Factory Mutual (FM) approval manual supplement.

EXPOSURE TO RADIO FREQUENCY ENERGY

Your Motorola Two-Way Radio, which generates and radiates radio frequency (RF) electromagnetic energy

(EME), is designed to comply with the following National and International Standards and Guidelines regarding exposure of human beings to radio frequency electromagnetic energy:

●

Federal Communications Commission Report and Order No. FCC 96-326 (August 1996)

●

American National Standards Institute (C95.1 - 1992)

●

National Council on Radiation Protection and Measurements (NCRP-1986)

●

International Commission on Non-Ionizing Radiation Protection (ICNRP- 1986)

●

European Committee for Electrotechnical Standardization (CENELEC):

- ENV 50166-1 1995 E

- ENV 50166-2 1995 E

- Proceedings of SC211/B 1996

Human exposure to electromagnetic fields Low frequency (0 Hz to 10 kHz)

Human exposure to electromagnetic fields High frequency (10 kHz to 300 GHz)

“Safety Considerations for Human Exposure to EMFs from

Mobile Telecommunication Equipment (MTE) in the Frequency Range 30MHz - 6 GHz.” (EMF - Electro-Magnetic

Fields)

To assure optimal radio performance and to ensure that your exposure to radio frequency electromagnetic energy is within the guidelines in the above standards, always adhere to the following procedures:

MOBILE RADIO OPERATION AND EME EXPOSURE

●

Transmit only when people inside and outside the vehicle are at least the minimum distance away from a properly installed, externally mounted antenna.

Table 1 below lists the minimum distance for several different ranges of rated radio power.

Mobile Two-Way Radio

7-15 Watts

16-50 Watts

More Than 50 Watts

Minimum Distance From

Transmitting Antenna

1 Foot (30.5 Centimeters)

2 Feet (61 Centimeters)

3 Feet (91.5 Centimeters)

MOBILE ANTENNA INSTALLATION

A vehicle antenna must be installed external to the vehicle and in accordance with:

●

The requirements of the antenna manufacturer/supplier

●

Instructions in the Radio Installation Manual

i

ii

Safety Information

CONTROL STATION OPERATION

When radio equipment is used to operate as a control station, it is important that the antenna be installed outside the building and away from places where people may be in close proximity.

NOTE

Refer to Table 1 for rated power and minimum distance values for transmitting antennas.

ELECTROMAGNETIC INTERFERENCE/COMPATIBILITY

NOTE Nearly every electronic device is susceptible to electromagnetic interference (EMI) if inadequately shielded, designed, or alternately configured for electromagnetic compatibility.

●

To avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any facility where posted notices instruct you to do so. Hospital or health facilities may be using equipment that is sensitive to external RF energy.

●

When instructed to do so, turn off your radio when on board an aircraft. Any use of a radio must be in accordance with airline regulations or crew instructions.

OPERATIONAL WARNINGS

Potentially explosive atmospheres

!

WARNING: Turn off your Two-Way radio when you are in any area with a potentially explosive atmosphere, unless it is a radio type especially qualified for use in such areas (e.g. FM or

Cenelec approved). Sparks in a potentially explosive atmosphere can cause an explosion or fire resulting in bodily injury or even death.

Blasting caps and areas

!

WARNING: To avoid possible interference with blasting operations, turn off your radio when you are near electrical blasting caps. In a “ blasting area ” or in areas posted “ turn off two-way radio ”, obey all signs and instructions.

NOTE

The areas with potentially explosive atmospheres referred to above include fuelling areas such as: below decks on boats; fuel or chemical transfer or storage facilities; areas where the air contains chemicals or particles, such as grain, dust or metal powders; and any other area where you would normally be advised to turn off your vehicle engine. Areas with potentially explosive atmospheres are often but not always posted.

!

OPERATIONAL CAUTIONS

Damaged antennas www.myradio168.net

CAUTION: Do not use any two-way radio that has a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn can result.

CAUTION

Cautions and Warnings

ELECTROSTATIC SENSITIVE DEVICES

PRECAUTIONS SHOULD BE TAKEN TO MINIMIZE THE RISK OF DAMAGE BY

ELECTROSTATIC DISCHARGE TO ELECTROSTATIC SENSITIVE DEVICES (ESDs).

ANY DEVICES EMPLOYING METAL OXIDE SILICON (MOS) TECHNOLOGY ARE

PARTICULARLY SUSCEPTIBLE.

CIRCUIT DIAGRAMS MARKED WITH THE ABOVE SYMBOL INDICATE ELECTRONIC

CIRCUITS (PECs) FOR WHICH ESD HANDLING PRECAUTIONS ARE NECESSARY.

THE USER SHOULD REFER TO BS5783, 1984: HANDLING OF ELECTROSTATIC

SENSITIVE DEVICES. THIS BRITISH STANDARD SUPERSEDES DEF STAN 59-98,

ISSUE 2.

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iii

Cautions and Warnings iv

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WARNING

Cautions and Warnings

SAFETY WARNINGS

THE ELECTRICAL POWER USED IN THIS EQUIPMENT IS AT A VOLTAGE HIGH

ENOUGH TO ENDANGER LIFE.

BEFORE CARRYING OUT MAINTENANCE OR REPAIR, PERSONS CONCERNED

MUST ENSURE THAT THIS EQUIPMENT IS ISOLATED FROM THE ELECTRICAL

SUPPLY AND TESTS ARE MADE TO ENSURE THAT ISOLATION IS COMPLETE.

WHEN THE SUPPLY CANNOT BE ISOLATED, MAINTENANCE AND REPAIR MUST BE

UNDERTAKEN BY PERSONS WHO ARE FULLY AWARE OF THE DANGERS INVOLVED

AND WHO HAVE TAKEN ADEQUATE PRECAUTIONS TO PROTECT THEMSELVES.

COMPONENTS CONTAINING BERYLLIUM OXIDE ARE USED IN THIS EQUIPMENT.

DUST FROM THIS MATERIAL IS A HEALTH HAZARD IF INHALED OR ALLOWED TO

COME INTO CONTACT WITH THE SKIN.

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MUST NOT BE BROKEN OR SUBJECTED TO EXCESSIVE HEATING. DEFECTIVE

COMPONENTS MUST BE DISPOSED OF IN ACCORDANCE WITH CURRENT

INSTRUCTIONS.

LEAD ACID BATTERIES MAY BE FITTED AS THE STANDBY BATTERY. CARE MUST BE

TAKEN WHEN REMOVING OR INSTALLING THESE BATTERIES TO:

1. ENSURE THAT THE TERMINALS ARE NOT SHORTED TOGETHER.

2. PREVENT SPILLAGE OF THE CORROSIVE ELECTROLYTE.

v

Cautions and Warnings vi

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Service Manual

Contents

Chapter

1.0

2.0

3.0

4.0

5.0

Introduction

Gives a brief introduction into the manual and the service policy.

Model Chart and Accessories

Provides list of models and accessories available for the mobile radio.

Maintenance

Describes how to disassemble/assemble the radio for maintenance purposes and gives details on safety precautions. The radio tuning procedure is also provided in this chapter.

Theory Of Operation

Gives a detailed description about the operation of the radio. The information is supplied to circuit reference detail.

Schematic Diagrams and Parts Lists

Provides schematic diagrams, component location diagrams and associated parts lists.

Appendix

A.0

www.myradio168.net

B.0

Hand Held Control Head PMMN4005

Contents

Service Manual vii

Contents viii

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Service Manual

Table of Contents

Chapter 1

Introduction

Table of Contents

Paragraph

1.0

Page

Introduction

................................................................................................ 1

2.0

3.0

5.0

5.1

5.2

5.3

4.0

4.1

4.2

4.3

4.4

Scope of Manual

........................................................................................ 1

How to Use This Manual

............................................................................ 1

Warranty and Service Support

................................................................. 1

Warranty Period........................................................................................... 1

After Warranty Period .................................................................................. 1

Piece Parts .................................................................................................. 2

Technical Support........................................................................................ 2

Specifications

............................................................................................ 3

General ........................................................................................................ 3

Receiver....................................................................................................... 3

Transmitter................................................................................................... 3 www.myradio168.net

Introduction 1-i


1-ii

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Introduction

Introduction

1

1.0

Introduction

This chapter outlines the scope and use of the service manual and provides an overview of the warranty and service support. The radio specifications are also supplied in this chapter.

2.0

Scope of Manual

This manual is intended for use by experienced technicians familiar with similar types of equipment.

It contains service information required for the equipment described and is current as of the printing date. Changes which occur after the printing date are incorporated by a complete Service Manual revision to your Product Manual.

3.0

How to Use This Manual

This manual contains introductory material such as overview, model charts, specifications and accessories and the remaining chapters deal with specific service aspects of the radio.

Refer to the Table of Contents for a general overview of the manual.

4.2

4.0


Motorola offers long term support for its products. This support includes full exchange and/or repair of the product during the warranty period, and service/ repair or spare parts support out of warranty.

Any "return-for-exchange" or "return-for-repair" by an authorised Motorola Dealer must be accompanied by a Warranty Claim Form. Warranty Claim Forms are obtained by contacting an

Authorised Motorola Dealer.

4.1

Warranty Period

The terms and conditions of warranty are defined fully in the Motorola Dealer or Distributor or

Reseller contract. These conditions may change from time to time and the following notes are for guidance purposes only.

In instances where the product is covered under a "return for replacement" or "return for repair" warranty, a check of the product should be performed prior to shipping the unit back to Motorola. To ensure the product has been correctly programmed or has not been subjected to damage outside www.myradio168.net

Prior to shipping any radios back to the appropriate Motorola warranty depot, please contact

Customer Services. All returns must be accompanied by a Warranty Claim Form, available from your Customer Services representative. Products should be shipped back in the original packaging, or correctly packaged to ensure no damage occurs in transit.

After Warranty Period

After the Warranty period, Motorola continues to support its products in two ways.

1.

2.

Motorola's Accessories and Aftermarket Division (AAD) offers a repair service to both end users and dealers at competitive prices.

AAD supplies individual parts and modules that can be purchased by dealers who are technically capable of performing fault analysis and repair.

Introduction 1-1

1-2


4.3

4.4

Piece Parts

Some replacement parts, spare parts, and/or product information can be ordered directly. If a complete Motorola part number is assigned to the part, it is available from Motorola’s Accessories and Aftermarket Division (AAD). If no part number is assigned, the part is not normally available from Motorola. If the part number is appended with an asterisk, the part is serviceable by Motorola

Depot only. If a parts list is not included, this generally means that no user-serviceable parts are available for that kit or assembly.

All orders for parts/information should include the complete Motorola identification number. All part orders should be directed to your local AAD office. Please refer to your latest price pages.

Technical Support

Technical support is available to assist the dealer/distributor in resolving any malfunction which may be encountered. Initial contact should be by telephone wherever possible. When contacting

Motorola Technical Support, be prepared to provide the product

model number

and the unit’s

serial number

.

Toll-Free

Country Number

Australia

China

Hong Kong

Indonesia

Korea

Malaysia

New Zealand

Philippines

1800-774457

800-810-0976

25904800

0800-1-686868

080-300-7400

1800-801687

0800-442109

1800-16510271

Singapore

Taiwan

1800-4855333 www.myradio168.net

Thailand (outside Bangkok) 088-225412

Non-Toll-Free

Country

India

Thailand (Bangkok area)

All Other Countries

Number

80-6658922

2548388

IDD Code+(65)-4855333

Introduction

Specifications

5.0

Specifications

5.1

General

Frequency Range 336-390MHz

Channel Spacing

Modulation

25kHz

FM,

Type 8K5G3,14G3,16G3

50 Ohms Antenna Impedance

Mode of Operation

Power Supply VDC

Trunked/Conventional

10.8 - 15.6

Operating Temperature - 25 to + 55°C

Storage Temperature - 40 to + 85°C

Environmental

Frequency Stability

IP 54, MILSTD 810E

300MHz: 3 ppm

Dimensions

Weight

168x160x44 (HxWxD)

1030g

5.2

Receiver

25kHz

Sensitivity

12dB SINAD µV

Audio Output Power

<5% distortion @1kHz with rated audio output

Spurious /

Image Rejection

Selectivity

Intermodulation

Switching Bandwidth

No degradation

0.35

µV

4W (internal loudspeaker)

13W (external loudspeaker)

70dB

65dB

300MHz: 336-390MHz

5.3

Transmitter

Power Output

(no degradation) ...........

Maximum Deviation

25kHz

Audio Distortion

(@1kHz, 60% deviation)

Spurious and Harmonics

Switching Bandwidth

No degradation

5 - 25W

± 5kHz

5%

- 36dBm

336-390MHz

Introduction 1-3

Specifications

1-4

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Introduction


Chapter 2

Model Chart and Accessories

Table of Contents

Paragraph

1.0

Page

Overview

..................................................................................................... 1

2.0

3.0

3.1

3.2

3.3

3.4

Model Chart

............................................................................................... 1

Accessories

................................................................................................ 2

Mechanical Hardware Kits ........................................................................... 2

Speakers...................................................................................................... 2

Cables.......................................................................................................... 2

Other............................................................................................................ 2 www.myradio168.net

Model Chart and Accessories 2-i


2-ii

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2

1.0

Overview

This chapter lists the models and accessories available for the MCX600E mobile radio.

2.0

Model Chart

Overview

MCX600E

336-390 MHz

X = Indicates one of each required

Item

X GBN6147

X GLN7331

X GLN7317

Description

Packaging Kit

Blank Control Head

MPT Trunnion Kit

X GKN6270

X 6804111J88

Power Cable

MCX600E User Guide

Model Chart and Accessories 2-1

2-2

Accessories

3.0

Accessories

3.1

Mechanical Hardware Kits

GLN7317_

GLN7324_

GLN7331_

Standard Trunnion kit

Low Profile Trunnion kit

Blank Control Head

3.2

3.3

3.4

Speakers

All speaker connecting cables have 16-pin accessory connector plug.

GSN6059_ 13W External Speaker, square

Cables

GKN6270_

GKN6271_

Battery power cable 3m, 10A fuse (Standard)

Ignition switch cable

Other

GKN6272_

GLN7323_

GLN7318_

GPN6126_

GPN6127_

GPN6133_

HPN4002_

HPN8393_

Alarm, Relay and Cable Kit

External PTT

Base Tray

24/12V DC Converter, 6A

24/12V DC Converter, 15A

EMC approved mains Power Supply

Non-EMC approved mains Power Supply

Non-EMC approved mains Power Supply www.myradio168.net



Chapter 3

Maintenance

Table of Contents

4.0

5.0

6.0

2.0

2.1

2.2

2.3

3.0

3.1

3.2

Paragraph

1.0

Page

Overview

..................................................................................................... 1

Disassemble the Radio

............................................................................. 1

Remove the Control Head ........................................................................... 1

Remove the Top Cover................................................................................ 2

Remove the Transceiver Board ................................................................... 2

Assemble Radio

......................................................................................... 3

Replace the Transceiver Board ................................................................... 3

Replace the Top Cover and Control Head................................................... 3

Exploded View Diagrams and Parts

......................................................... 4

Service Aids

............................................................................................... 5

Test Equipment

.......................................................................................... 6

7.0

Radio Tuning Procedure

............................................................................ 7

7.5

7.6

7.7

7.8

7.1

7.2

7.3

7.4

General ........................................................................................................ 7 www.myradio168.net

Battery Threshold ........................................................................................ 9

Reference Oscillator .................................................................................. 10

Front-End Pre-Selector.............................................................................. 10

Rated Volume ............................................................................................ 11

Squelch...................................................................................................... 11

7.9

Transmit Voltage Limit ............................................................................... 12

7.10

Transmit Deviation Balance (Compensation) ............................................ 12

7.11

Transmit Deviation Limit ............................................................................ 13

7.12

Signalling Alignments ................................................................................ 13

Maintenance 3-i


3-ii

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Maintenance

Overview

3

1.0

Overview

This chapter explains, step by step, how to disassemble and assemble the radio, to transceiver board level. The chapter also contains a list of test equipment required to service the radio and the procedure for radio alignment/test setup is also available in this chapter.

Note:

Control head type may differ from the diagram shown in this section, depending on the models supported. However, the instructions pertaining to its removal and assembly are the same across models.

2.0


2.1

Remove the Control Head

Recess

Figure 3-1

Control Head Removal.

1.

2.

3.

4.

Insert a small flat blade screw driver, or similar, in the recess between the control head and the transceiver (to minimise cosmetic damage to the radio cover start from the bottom side).

Press until the side of the control head releases and then repeat the operation on the opposite side of the radio.

Pull the control head away from the transceiver.

Remove the flex from the socket on the control head board.

www.myradio168.net

Maintenance 3-1


2.2

Remove the Top Cover

Recess

3-2

2.3

Figure 3-2

Top Cover Removal.

1.

2.

Insert a small flat blade screw driver in the side recess of the radio chassis.

Lift the top cover over the chassis.

Remove the Transceiver Board

Protruding Tabs

Flex

Clip

Recess

Clip

Recess

Chassis www.myradio168.net

Transceiver Board Top Cover

Figure 3-3

Transceiver Board Removal.

1.

2.

Remove the power and antenna connector retaining clips by inserting a small flat blade screw driver between the clip and the top of the chassis wall and gently prying the clip upwards.

Remove 13 screws from the transceiver board using a T8 TORX driver.

Maintenance

Assemble Radio

3.

Carefully remove the transceiver board by rotating it out of the chassis:

Slowly lift the board on the front edge, the side with the connector that mates with the control head, and pull gently toward the front of the radio.

CAUTION:

The thermal grease can act as an adhesive and cause the leads of the heat dissipating devises to be over stressed if the board is lifted too quickly.

3.0

Assemble Radio

3.1

Replace the Transceiver Board

1.

2.

3.

Inspect and if necessary, reapply thermal grease to the heatsinking pads in the chassis.

Before installing the connector retaining clips, ensure that the board is sitting flush on the chassis mounting surface.

Install the 13 screws with 0.4 -07 NM (4-6 in lbs) of torque using a T8 TORX driver.

3.2

Replace the Top Cover and Control Head

1.

2.

3.

Position the top cover over the chassis and replace. Ensure that the cross snaps into the recesses.

Connect the control head to the radio by the flex.

Press the control head onto the radio chassis until the protruding tabs on the chassis snap into the recesses inside the control housing, see Figure 3-4.

Recess www.myradio168.net

Figure 3-4

Control Head Replacement.

Maintenance 3-3

3-4


4.0


Cover Chassis 1502609Y01 incl. Gasket Chassis

3202619Y01

Shield

2602640Y01

Controlhead with or without LCD

Main

PCB

Screw M3x10

03S10911A12

Flex

8402618Y01

Pad

7502618Y01

Gasket

Controlhead

3202620Y01

Antenna Conn.

0905901V06 incl. Gasket

3205929V01

Chassis

2702608Y01

Gasket Cover

3202607Y01

Figure 3-5

Radio Exploded View Diagram.

Shield

2602639Y01

Accessory Conn. 16Pin

2804503J01

Power Conn. 0905902V01

Gasket 3205930V01

Clip 4205938V01

Connector 1580922V01

Gasket Accessory Conn.

3202606Y01 www.myradio168.net

Maintenance

Service Aids

5.0

Service Aids

The list in table 3-1 includes service aids recommended for working on the radio.

Table 3-1

Service Aids.

PART No.

GTF376

GTF374

GTF377

GPN6133

GKN6266

GTF180

RLN4008

EPN4040

EPN4041

3080369B72

3080369B71

PMVN4022D

PMVN4023D

DESCRIPTION APPLICATION

Test Box Cable

Combined Interface

Cable

Connects radio to GTF180 test box.

Connects radio to RLN4008 RIB.

Combined Interface

Cable

Connects Databox radio to RLN4008 RIB.

Power Supply Used to supply power to the radio.

DC Power Cable for radio Interconnects radio to power supply.

Test Box

Radio Interface Box

Enables connection to the universal connector. Allows switching for radio testing.

Enables communications between the radio and the computer’s serial communications adapter.

Power Supply

Power Supply

Computer Interface

Cable

Computer Interface

Cable

PTX600/MCX600E

DPS_Dealer

PTX600/MCX600E

DPS_Network

Used to supply power to the RIB (240 VAC).

Used to supply power to the RIB (220 VAC).

Connects the computer’s serial communications adapter

(9 pin) to the RIB.

Connects the computer’s serial communications adapter

(25 pin) to the RIB.

DPS Dealer Software, 3.5” floppy disks

DPS Network Software, 3.5” floppy disks www.myradio168.net

Maintenance 3-5

3-6

Test Equipment

6.0

Test Equipment

The list in table 3-2 includes all standard test equipment required for servicing two-way mobile radios, as well as several unique items designed specifically for servicing the radio. Battery-operated test equipment is recommended when available. The “Characteristics” column is included so that equivalent equipment may be substituted; however, when no information is provided in this column, the specific Motorola model listed is either a unique item or no substitution is recommended.

Table 3-2

Recommended Test Equipment.

MODEL No.

R2000 Series

*R1150C

DESCRIPTION

System Analyser

Code Synthesizer

CHARACTERISTICS APPLICATION

This monitor will substitute for items with an asterisk (*)

1mV to 300V, 10-Mohm

Input impedance

Frequency/deviation meter and signal generator for wide-range troubleshooting and alignment.

Injection of audio and digital signalling codes

Audio voltage measurements *S1053D

*HM-203-7

*SKN6008A

*SKN6001A

*S1350C

*ST1213B (VHF)

*ST1223B (UHF)

R1065A

S1339A

*R1013A

220 VAC Voltmeter

110 VAC Voltmeter

Power Cable for Meter

Test Leads for Meter

Watt Meter

Plug-in Element

RF Dummy Load

Load Resistor

RF Millivolt Meter

10kHz to 1.2 GHz

SINAD Meter

50 ohm, ±5% accuracy

10 Watts, maximum

0-1000 MHz, 300W

10-watt Broadband

100µV to 3V rf

Transmitter power o/p measurements

For use with Wattmeter

RF level measurements

S1347D or

S1348D

(programmable)

DC Power Supply 0-20Vdc, 0-5 Amps

Receiver sensitivity measurements

Bench supply for 13.2Vdc current limited

* Any of the R2000 Series system analysers will substitute for items with an asterisk (*) www.myradio168.net

Maintenance


7.0


7.1

General

The recommended hardware platform is a 386 or 486 DX 33 PC (personal computer) with 8 Mbytes

RAM, MS DOS 5.0, Windows 3.1, and DPS (Dealer Programming Software). These are required to align the radio. Refer to your DPS Installation Manual for installation and setup procedures for the required software; the user manual is accessed (and can be printed if required) via the DPS.

To perform the alignment procedures, the radio must be connected to the PC, RIB (Radio Interface

Box), and Universal Test Set as shown in Figure 3-6.

SERVICE MONITOR

OR COUNTER

30 dB PAD

TRANSMIT

30 dB PAD

WATTMETER

BNC

SMA-BNC

58-80348B33

RECEIVE

RF GENERATOR

MIC IN

RADIO

PROGRAM/TEST CABLE

GTF377 (Databox Radios only) or GTF374

TEST CABLE

GTF-376

TEST SET

RTX4005/

GTF180

AUDIO IN TX

RX

AUDIO GENERATOR

SINAD METER

AC VOLTMETER

Note: Battery can be used in RIB making power supply optional

25PIN 15PIN

RIB

RLN-4008B

DATA

GND

RIB POWER SUPPLY

EPN4041 (230 VAC. Euro)/

EPN4040 (230 VAC. UK)

COMPUTER INTERFACE CABLE

30-80369B72 (IBM "AT" 9PIN ONLY)

30-80369B71 (IBM "XT" 25PIN ONLY)

COMPUTER

Figure 3-6

Radio Alignment Test Setup www.myradio168.net

All tuning procedures are performed from the Service menu.

Before going into the Service menu, the radio must first be read using the File / Read Radio menu (if the radio has just been programmed with data loaded from disk or from a newly created codeplug, then it must still be read so that the DPS will have the radio’s actual tuning values).

All Service windows read and program the radio codeplug directly; you do NOT have to use the DPS

Read Radio / Write Radio functions to program new tuning values.

CAUTION: DO NOT

switch radios in the middle of any Service procedure. Always use the

Program or Cancel key to close the tuning window before disconnecting the radio.

Improper exits from the Service window may leave the radio in an improperly configured state and result in seriously degraded radio or system performance.

Maintenance 3-7

3-8


7.2

The Service windows introduce the concept of the “Softpot”, an analog SOFTware controlled

POTentiometer used for adjusting all transceiver alignment controls. A softpot can be selected by clicking with the mouse at the value or the slider or by hitting the TAB key until the value or the slider is highlighted.

Each Service window provides the capability to increase or decrease the ‘softpot’ value with the mouse, the arrow keys or by entering a value with the keyboard. The window displays the minimum, maximum, and step value of the softpot. In addition transmitter tuning windows indicate whether the radio is keyed and the transmitter frequency.

Adjusting the softpot value sends information to the radio to increase (or decrease) a DC voltage in the corresponding circuit. For example, increasing the value in the Reference Oscillator tune window instructs the radio microprocessor to increases the voltage across a varactor in the reference oscillator to increase the frequency. Pressing the Program button stores all the softpot values of the current window permanently in the radio.

In ALL cases, the softpot value is just a relative number corresponding to a D/A (Digital-to-Analog) generated voltage in the radio. All standard measurement procedures and test equipment are similar to previous radios.

Refer to the DPS on-line help for information on the tuning software.

Perform the following procedures in the sequence indicated.

Note:

All tuning procedures must be performed at a supply voltage of 13.2V unless otherwise stated.

PA Bias Voltage

Adjustment of the PA Bias is critical for proper radio operation. Improper adjustment will result in poor operation and may damage the PA FET device. For this reason, the PA bias must be set before the transmitter is keyed the first time.

Note: For certain radio models there are two bias voltage settings. For these radios both ‘ Bias 1

Voltage ’ and ‘ Bias 2 Voltage ‘ need to be adjusted when aligning the PA Bias. For models that only have one bias voltage setting, the ‘ Bias 2 Voltage ‘ will be shown in grey on the service menu.

1.

2.

3.

4.

5.

6.

From the Service menu, select Transmitter Alignment.

www.myradio168.net

and tuning must be stopped immediately.

Click the button labelled “0” to set the quiescent current temporarily to 0 mA

Measure the DC current of the radio. Note the measured value and add the specified quiescent current shown in table 3-3. The result is the tuning target.

Adjust the current per the target calculated in step 3.

Click the Program button to store the softpot value.

Table 3-3

Quiescent Current Alignment

RF-Band

UHF

VHF / 336-390MHz

Target

440mA±10%

150mA±15%

Maintenance


7.3

7.4

Transmitter Power

The radio has two power level settings, a high power level setting, and a low power level setting.

IMPORTANT

: To set the transmitter power for customer applications use the Common Radio

Parameters window under the Edit menu and set the “Low Power Level” and “High Power Level” powers to the desired values. Only if the transmitter components have been changed or the transmitter does not transmit with the power set in the Common Radio Parameters window the following procedure should be performed.

The advanced power setting technology employed in the radio makes use of two reference power level settings along with parameters describing the circuit behaviour. To determine these parameters the DPS requires the power values measured for two different settings.

1.

2.

7.

8.

9.

10.

3.

4.

5.

6.

11.

12.


Select RF Power Tuning to open the RF power tuning window. The window will indicate the transmit test frequencies to be used.

Select Point 1 value of the first frequency.

Click Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

Measure the transmitter power on your power meter.

Enter the measured value in the box Point 1.

Select Point 2 value of the first frequency.

Measure the transmitter power on your power meter.

Enter the measured value in the box Point 2.

Click Toggle PTT to dekey the radio.

Repeat steps 4 - 7 for all test frequencies shown in the window.

Click Program to store the softpot values.

Battery Threshold

The radio uses 2 battery threshold levels Tx High and Tx Low to determine the battery condition.

The Program buttons must only be activated when the power supply is set to the indicated voltage. If the DPS detects that the voltage is not within the expected range for the threshold in question then a message will be displayed to warn that the radio may not be set up correctly for the alignment operation.

CAUTION:

www.myradio168.net

Inadvertant use of the program buttons may result in radio failure.

1.

2.

3.

4.

5.

6.

7.


Select Battery Threshold to open the battery threshold tuning window. The current softpot values are displayed for information only and can´t be edited.

Set the supply voltage to the value indicated for TX High.

Click the TX High Program button to store the softpot value for TX High.

Set the supply voltage to the value indicated for TX Low.

Click the TX Low Program button to store the softpot value for TX Low.

Close the window by clicking Cancel.

Maintenance 3-9


7.5

Reference Oscillator

Adjustment of the reference oscillator is critical for proper radio operation. Improper adjustment will not only result in poor operation, but also a misaligned radio that will interfere with other users operating on adjacent channels. For this reason, the reference oscillator should be checked every time the radio is serviced. The frequency counter used for this procedure must have a stability of 0.1 ppm (or better).

1.

2.

3.

4.

5.

6.


Select Reference Oscillator to open the reference oscillator tuning window. The tuning window will indicate the target transmit frequency.


Measure the transmit frequency on your frequency counter.

Adjust the reference oscillator softpot in the tuning window to achieve a transmit frequency within the limits shown in table 3-4.

Click Toggle PTT again to dekey the radio and then press Program to store the softpot value.

Table 3-4

Reference Oscillator Alignment

RF-Band

All bands

Target

±150 Hz

7.6

Front-End Pre-Selector

Alignment of the front-end pre-selector is normally not required on these radios. Only if the radio has poor receiver sensitivity or the pre-selector parts has been replaced the following procedure should be performed. The softpot value sets the control voltage of the pre-selector. Its value needs to be set at 7 frequencies across the frequency range.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Set the test box (GTF180) meter selection switch to the "Audio PA" position and connect a

SINAD meter to the "METER" port.

From the Service menu, select Receiver Alignment.

Select Front End Filter to open the pre-selector tuning window. The window will indicate the receive test frequencies to be used.

Select the first test frequency shown, and set the corresponding value to maximum.

www.myradio168.net

with a 1 kHz tone at the normal test deviation shown in table 3-5.

Measure the RSSI voltage at accessory connector pin 15 with a dc voltmeter capable of 1 mV resolution.

Change the softpot value by the stepsize shown in table 3-6 and note the RSSI voltage.The target softpot value is achieved when the measured RSSI voltage change between step 6 and step 7 is lower than the tuning target for the first time. The tuning target, shown in table 3-6, is expressed as the percentage of the measured RSSI voltage and must be recalculated for every tuning step. If the measured RSSI voltage decreases before the target value has been achieved, approximation should be stopped and the current softpot value should be used as target value. Set test box (GTF180B) audio switch to the “SPKR” position. The 1 kHz tone must be audible at the target value to make sure the radio is receiving.

Repeat steps 4 - 7 for all test frequencies shown in the window.

Click the Program button to store the softpot values.

3-10 Maintenance


7.7

7.8

Table 3-5

Normal Test Deviation.

Channel Spacing

12.5 kHz

20 kHz

25 kHz

Deviation

1.5 kHz

2.4 kHz

3 kHz

Table 3-6

Start Value for Front-End Pre-selector Tuning.

RF-Band

UHF

VHF

336-390MHz

Target

0.5%

0.42%

0.84

Stepsize

-2

+2

-2

Start Value

Maximum

Minimum

Maximum

Rated Volume

The rated volume softpot sets the volume at normal test modulation.

1.

2.

3.

4.

5.

6.

Set test box (GTF180) meter selection switch to the “AUDIO PA” position and the speaker load switch to the "MAXAR" position. Connect an AC voltmeter to the test box meter port.


Select Rated Volume to open the rated volume tuning window. The screen will indicate the receive test frequency to be used.

Set the RF test generator to the receive test frequency, and set the RF level to 1mVolt modulated with a 1 kHz tone at the normal test deviation shown in table 3-5. Set test box

(GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be audible to make sure the radio is receiving.

Adjust the value of the softpot to obtain rated audio volume (as close to 3.87 Vrms).


Squelch

4.

5.

6.

7.

2.

3.

1.

The squelch softpots set the signal to noise ratio at which the squelch opens. The squelch value needs to be set at 7 frequencies across the frequency range.

www.myradio168.net

Set the test box (GTF180) meter selection switch to the "Audio PA" position and connect a

SINAD meter to the "METER" port.


Select Squelch Attenuation to open the squelch attenuation tuning window. The window will indicate the receive test frequencies to be used.

Select the first test frequency shown, and set the corresponding value to 0.

Set the RF test generator to the test frequency and modulate the signal generator at the normal test deviation shown in table 3-5, with 1 kHz tone. Adjust the generator for a 8-10 dB SINAD level (weighted with psophometric filter).

Adjust the softpot value until the squelch just closes.

Monitor for squelch chatter; if chatter is present, repeat step 6.

Maintenance 3-11


7.9

8.

When no chatter is detected, select the next softpot and repeat steps 4 - 7 for all test frequencies shown in the window.

9.


Transmit Voltage Limit

The transmit control voltage limit softpot sets the maximum power control voltage. All 7 voltage limit softpots are tuned and programmed automatically when the Program button is clicked.

1.


2.

Select Voltage Limit to open the voltage limit tuning window.

3.

Set the Power Factor to 1.3.

4.


7.10

Transmit Deviation Balance (Compensation)

Compensation alignment balances the modulation sensitivity of the VCO and reference modulation

(synthesiser low frequency port) lines. Compensation algorithm is critical to the operation of signalling schemes that have very low frequency components (e.g. DPL) and could result in distorted waveforms if improperly adjusted. The compensation value needs to be set at 7 frequencies across the frequency range.

1.


2.

Select Modulation Attenuation to open the deviation balance tuning window. The window will indicate the transmit test frequencies to be used.

3.

Set the Test Box (GTF180) meter selector switch to the “GEN” position, and inject a 80 Hz tone at 200 mVrms into the "Audio In" port. (The deviation measured at step 6 should be about

1-4kHz.) Connect an AC meter to the meter port to insure the proper input signal level.

4.

Select the first test frequency shown in the window.

5.


6.

Measure the transmitter deviation.

7.

Change the input tone to 3 kHz, 200 mVrms.

8.

Adjust the deviation to within ±2% of the value recorded in step 6.

9.

Check the deviation at 80 Hz again and repeat step 7-8, if it has changed since step 6.

www.myradio168.net

11. Repeat steps 3 - 10 for the remaining test frequencies.

12. Click the Program button to store the softpot values.

Note:

The step size change for step 8 is approximately 2.5% softpot value.



7.11

Transmit Deviation Limit

The transmit deviation limit softpot sets the maximum deviation of the carrier. The deviation value needs to be set at 7 frequencies across the frequency range.

1.


2.

Select Reference Attenuation to open the reference attenuation tuning window.

3.

Set the maximum value and press Program to store the softpot value.

4.


5.

Select VCO Attenuation to open the deviation limit tuning window. The window will indicate the transmit test frequencies to be used.

6.

Set the Test Box (GTF180) meter selector switch to the “GEN” position, and inject a 1 kHz tone at 800 mVrms into the "Audio In" port. Connect an AC meter to the meter port to ensure the proper input signal level.

7.

Select the first test frequency shown in the window.

8.

Click the Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

9.

Adjust the transmitter deviation to the value shown in table 3-6.

10. Click the Toggle PTT to dekey the radio.

11. Repeat steps 8 - 10 for the remaining test frequencies.

12. Click the Program button to store the softpot values.

Table 3-7 Transmitter Deviation

Channel Spacing

12.5 kHz

20 kHz

25 kHz

Deviation

2.2-2.3 kHz

3.4-3.6 kHz

4.3-4.6 kHz

7.12

Signalling Alignments

7.12.1

MPT RSSI Threshold Level

The Program buttons must only be activated when the required signal is input to the radio and the www.myradio168.net

RSSI level in question then a message will be displayed to warn that the radio may not be set up correctly for the alignment operation.

INADVERTANT USE OF THE PROGRAM BUTTONS MAY RESULT IN RADIO FAILURE.

1.

Set test box (GTF180) meter selection switch to the “AUDIO PA” position and the speaker load switch to the "MAXAR" position.

2.


3.

Select RSSI to open the RSSI tuning window. The screen will indicate the receive test frequency to be used.

Maintenance 3-13


4.

Set the RF test generator to the receive test frequency, and set the RF level to the value indicated for RSSI Level 0, modulated with a 1 kHz tone at the normal test deviation shown in table 3-5. Set test box (GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be audible to make sure the radio is receiving.

5.

Click the Program button to store the softpot value for RSSI Level 0.

6.

Repeat steps 4 - 5 for the remaining RSSI levels.

7.

Click the Cancel button to close the window.

7.12.2

MPT1327 Transmit Deviation / DTMF Transmit Deviation

The MPT1327 Deviation Softpot is used to tune the FFSK signalling deviation. Tuning is performed at one frequency. The radio generates an alternating bit pattern for tuning. Values for other frequencies are calculated by the radio software.

The DTMF Deviation Softpot is used to tune the DTMF signalling deviation. Tuning is performed at one frequency. The radio generates a DTMF signal for tuning. Values for other frequencies are calculated by the radio software.

1.


2.

Select Signalling Deviation to open the signalling deviation tuning window.

3.

Select the MPT value and press Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting.

4.

Adjust the transmitter deviation to the value shown in table 3-8.

5.

Click the Toggle PTT to dekey the radio.

6.

Repeat steps 3 - 5 for DTMF deviation.

7.


Table 3-8 Signalling Deviation

Channel Spacing

12.5 kHz

MPT 1327

1.4-1.6 kHz

Deviation

1.5-1.8 kHz

20 kHz 2.2-2.6 kHz 2.4-2.8 kHz

25 kHz 2.8-3.2 kHz 3.0-3.4 kHz www.myradio168.net



Chapter 4

Theory of Operation

Table of Contents

3.0

3.1

3.2

4.0

4.1

4.2

1.0

Overview

..................................................................................................... 1

2.0

Open Controller

.......................................................................................... 1

2.5

2.6

2.7

2.8

2.1

2.2

2.3

2.4

General ........................................................................................................ 1

Voltage Regulators ...................................................................................... 1

Electronic On/Off ......................................................................................... 2

Emergency................................................................................................... 2

Mechanical On/Off ....................................................................................... 3

Ignition ......................................................................................................... 3

Hook RSS .................................................................................................... 3

Microprocessor Clock Synthesizer .............................................................. 4

2.9

Serial Peripheral Interface (SPI) .................................................................. 4

2.10

SPEB Serial Interface .................................................................................. 5

2.11

General Purpose Input/Output..................................................................... 5

2.12

Normal Microprocessor Operation ............................................................... 5

2.13

FLASH Electronically Erasable Programmable Memory

(FLASH EEPROM) ...................................................................................... 7

2.14

Electrically Erasable Programmable Memory (EEPROM) ........................... 7

2.15

Static Random Access Memory (SRAM) ..................................................... 8

2.16

www.myradio168.net

CONTROLLER BOARD AUDIO AND SIGNALLING CIRCUITS

General

....................................................................................................... 9

Audio Signalling Filter IC (ASFIC) ............................................................... 9

Audio Ground............................................................................................... 9

Transmit Audio Circuits

............................................................................. 9

Mic Input Path.............................................................................................. 9

External Mic Path....................................................................................... 10

Theory of Operation 4-i

4-ii


6.0

6.1

6.2

6.3

6.4

7.0

7.1

7.2

4.3

5.0

5.1

5.2

5.3

PTT Sensing and TX Audio Processing .................................................... 11

Transmit Signalling Circuits

................................................................... 11

Sub-audible Data (PL/DPL) ....................................................................... 12

High Speed Data ....................................................................................... 12

Dual Tone Multiple Frequency (DTMF) Data............................................. 12

Receive Audio Circuits

............................................................................ 13

Squelch Detect .......................................................................................... 13

Audio Processing and Digital Volume Control ........................................... 14

Audio Amplification Speaker (+) Speaker (-) ............................................. 14

Filtered Audio ............................................................................................ 15

Receive Signalling Circuits

..................................................................... 15

Sub-audible Data (PL/DPL) and High Speed Data Decoder ..................... 16

Alert Tone Circuits ..................................................................................... 16

9.0

9.1

9.2

9.3

9.4

9.5

9.6

8.0

8.1

8.2

8.3

300MHz SPECIFIC CIRCUIT DESCRIPTION

Receiver Front-End

.................................................................................. 17

Front-End Band-Pass Filter & Pre-Amplifier .............................................. 17

Mixer and Intermediate Frequency (IF) Section ........................................ 17

IF IC (U5201) ............................................................................................. 18

Transmitter Power Amplifier (PA) 5-25W

............................................... 18

Power Controlled Stage............................................................................. 18

PA Stages.................................................................................................. 19

Directional Coupler .................................................................................... 19

Antenna Switch.......................................................................................... 19 www.myradio168.net

Power Control ............................................................................................ 20

10.0

Frequency Synthesis

............................................................................... 21

10.1

Reference Oscillator .................................................................................. 21

10.2

Fractional-N Synthesizer (U8701) ............................................................. 21

10.3

Voltage Controlled Oscillator (VCO) .......................................................... 22

10.4

Synthesizer Operation ............................................................................... 22

Theory of Operation

Overview

4

1.0

Overview

This section provides a detailed theory of operation for the radio and its components. The main radio is a single board design, consisting of the transmitter, receiver, and controller circuits.

The control head is either mounted directly on the front of the radio or connected via an extension cable in remote mount operation. The control head contains a speaker, LED indicators, a microphone connector, buttons and dependent of radio type, a display. These provide the user with interface control over the various features of the radio.

In addition to the power cable and antenna cable, an accessory cable can be attached to a connector on the rear of the radio. The accessory cable provides the necessary connections for items such as external speaker, emergency switch, foot operated PTT, ignition sensing, etc.

2.2

2.0

Open Controller

2.1

General

The radio controller consists of 4 main subsections:

Digital Control

Audio Processing

Power Control

Voltage Regulation

The digital control section of the radio board is based upon an open architecture controller configuration. It consists of a microprocessor, support memory, support logic, signal MUX ICs, the

On/Off circuit, and general purpose Input/Output circuitry.

The controller uses the Motorola 68HC11K1 microprocessor (U0101). In addition to the microprocessor, the controller has 3 external memory devices. The 3 memory devices consist of a

32 kByte SRAM (U0103), a 256kByte FLASH EEPROM (U0102), and an optional EEPROM (U0104 or U0107) upto 16kByte.

Note:

From this point on the 68HC11K1 microprocessor will be referred to as µP or K1µP. www.myradio168.net

Voltage Regulators

Voltage regulation for the controller is provided by 3 separate devices; U0631 (LP2951CM) +5V,

U0601 (LM2941T) +9.3V, and UNSW 5V (a combination of R0621 and VR0621). An additional regulator is located in the RF section.

Voltage regulation providing 5V for the digital circuitry is done by U0631. Input and output capacitors

(C0631/C0632 and C0633-C0635) are used to reduce high frequency noise and provide proper operation during battery transients. This regulator provides a reset output (pin 5) that goes to 0 volts if the regulator output goes out of regulation. This is used to reset the controller to prevent improper operation. Diode D0631 prevents discharge of C0632 by negative spikes on the 9V3 voltage

Theory of Operation 4-1

4-2

Open Controller

2.3

2.4

Regulator U0601 is used to generate the 9.3 volts required by some audio circuits, the RF circuitry and power control circuitry. Input and output capacitors (C0601-C0603 and C0604/C0605) are used to reduce high frequency noise. R0602/R0603 set the output voltage of the regulator. If the voltage at pin 1 is greater than 1.3 volts the regulator output decreases and if the voltage is less than 1.3 volts the regulator output increases. This regulator output is electronically enabled by a 0 volt signal on pin 2. Q0601 and associated circuitry (R0601/R0604/R0605) are used to disable the regulator when the radio is turned off.

UNSW 5V is only used in a few areas which draw low current and require 5 V while the radio is off.

UNSW 5V CL is used to buffer the internal RAM. C0622 allows the battery voltage to be disconnected for a couple of seconds without losing RAM parameters. Diode D0621 prevents radio circuitry from discharging this capacitor.

The voltage 9V3 SUPP is only used in the VHF radio (T1) to supply the drain current for the RF MOS

FET in the PA.

The voltage SW B+ is monitored by the µP through the voltage divider R0641/R0642 and line

BATTERY VOLTAGE. Diode VR0641 limits the divided voltage to 5.1V to protect the µP.

Diode D5601 (UHF) / D3601 (VHF) / D8601 (336-390MHz) located on the PA section acts as protection against transients and wrong polarity of the supply voltage.

Electronic On/Off

The radio has circuitry which allows radio software and/or external triggers to turn the radio on or off without direct user action. For example, automatic turn on when ignition is sensed and off when ignition is off.

Q0611 is used to provide SW B+ to the various radio circuits. Q0611 acts as an electronic on/off switch controlled by Q0612. The switch is on when the collector of Q0612 is low. When the radio is off Q0612 is cutoff and the voltage at Q0611-base is at A+. This effectively prevents current flow through Q0611 from emitter to collector. When the radio is turned on the voltage at the base of

Q0612 is high (about 0.6V) and Q0612 switches on (saturation) and pulls down the voltage at

Q0611-base. With Transistor Q0611 now enabled current flows through the device. This path has a very low impedance (less than 1

Ω

) from emitter to collector. This effectively provides the same voltage level at SWB+ as at A+.

The electronic on/off circuitry can be enabled by the microprocessor (through ASFIC port GCB2, www.myradio168.net

button on the control head (line ON OFF CONTROL), or the ignition sense circuitry (line IGNITION

CONTROL). If any of the 4 paths cause a low at the collector of Q0612, the electronic ON is engaged.

Emergency

The emergency switch (J0400-9), when engaged, grounds the base of Q0441 and pulls the line

EMERGENCY CONTROL to low via D0441. EMER IGN SENSE is pulled high by R0441. When the emergency switch is released the base of Q0441 is pulled high by R0442. This causes the collector of transistor Q0441 to go low (0.2V), thereby setting the EMER IGN SENSE line to low.


Open Controller

2.5

2.6

2.7

While EMERGENCY CONTROL is low, SW B+ is on, the microprocessor starts execution, reads that the emergency input is active through the voltage level of EMER IGN SENSE, and sets the B+

CONTROL output of the ASFIC pin B4 to a logic high. This high will keep Q0611 switched on through Q0612. This operation allows a momentary press of the emergency switch to power up the radio. When the microprocessor has finished processing the emergency press, it sets the B+

CONTROL line to a logic 0. This turns off Q0611 and the radio turns off. Notice that the microprocessor is alerted to the emergency condition via line EMER IGN SENSE. If the radio was already on when emergency was triggered then B+ CONTROL would already be high.

Mechanical On/Off

This refers to the typical on/off button, located on the control head or mic, and which turns the radio on and off. If the radio is turned off and the on/off button is pressed, line ON OFF CONTROL goes high and switches the radio on as long as the button is pressed. The microprocessor is alerted through line ANALOG 3 which is pulled to low by Q0925 (Control Head with display) while the on/off button is pressed. If the software detects a low state it asserts B+ CONTROL via ASFIC pin B4 high which keeps Q0612 and Q0611, and in turn the radio switched on.

If the on/off button is pressed and held while the radio is on, the software detects the line ANALOG

3 changing to low and switches the radio off by setting B+ CONTROL to low.

Ignition

Ignition sense is used to prevent the radio from draining the vehicle’s battery because the engine is not running.

When the IGNITION input (J0400-10) goes above 6 volts Q0612 is turned on via line IGNITION

CONTROL. Q0612 turns on SW B+ by turning on Q0611 and the microprocessor starts execution. A high IGNITION input reduces the voltage of line EMER IGN SENSE by turning on Q0450. The software reads the line EMER IGN SENSE, determines from the level (Emergency has a different level) that the IGNITION input is active and sets the B+ CONTROL output of the ASFIC pin B4 to high to latch on SW B+.

When the IGNITION input goes below 6 volts, Q0450 switches off and R0449, R0450 pull line

EMER IGN SENSE high. The software is alerted by line EMER IGN SENSE to switch off the radio by setting B+ CONTROL to low. The next time the IGNITION input goes above 6 volts the above process will be repeated.

Hook RSS

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The HOOK RSS input is used to inform the µP when the Microphone’s hang-up switch is engaged.

Dependent on the radio model the µP may take actions like turning the audio PA on or off.

The signal is routed from J0101-3 and J0400-14 through transistor Q0101 to the µP U0101-23. The voltage range of HOOK RSS in normal operating mode is 0-5V.

To start SBEP communication with the radio this voltage must be above 6V. This condition generates a µP interrupt via VR0102, Q0105, Q0104, Q0106 and enables the BUS+ line for communication via

Q0122, Q0121.


4-4

Open Controller

2.8

2.9

Microprocessor Clock Synthesizer

The clock source for the microprocessor system is generated by the ASFIC (U0201). Upon powerup the synthesizer U5701 (UHF) / U3701 (VHF) / U8701 (300MHz-R1) generates a 2.1 MHz waveform that is routed from the RF section (via C0202) to the ASFIC (on U0201-E1) For the main board controller the ASFIC uses 2.1MHz as a reference input clock signal for its internal synthesizer.

The ASFIC, in addition to audio circuitry, has a programmable synthesizer which can generate a synthesized signal ranging from 1200Hz to 32.769MHz in 1200 Hz steps.

When power is first applied, the ASFIC will generate its default 3.6864 MHz CMOS square wave

µ

P

CLK (on U0201-D1) and this is routed to the microprocessor (U0101-73). After the microprocessor starts operation, it reprograms the ASFIC clock synthesizer to a higher

µ

P CLK frequency (usually

7.9488 MHz) and continues operation.

The ASFIC may be reprogrammed to change the clock synthesizer frequencies at various times depending on the software features that are executing. In addition, the clock frequency of the synthesizer is changed in small amounts if there is a possibility of harmonics of this clock source interfering with the desired radio receive frequency.

The ASFIC synthesizer loop uses C0228, C0229 and R0222 to set the switching time and jitter of the clock output. If the synthesizer cannot generate the required clock frequency it will switch back to its default 3.6864MHz output.

Because the ASFIC synthesizer and the µP system will not operate without the 2.1MHz reference clock, it (and the voltage regulators) should be checked first when debugging the system.

Serial Peripheral Interface (SPI)

The µP communicates to many of the ICs through its SPI port. This port consists of SPI TRANSMIT

DATA (MOSI) (U0101-1), SPI RECEIVE DATA (MISO) (U0101-80), SPI CLK (U0101-2) and chip select lines going to the various ICs, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI

RECEIVE DATA) is sent. Therefore, whenever there is activity on either SPI TRANSMIT DATA or SPI

RECEIVE DATA there should be a uniform signal on CLK. The SPI TRANSMIT DATA is used to send serial from a

µ

P to a device, and SPI RECEIVE DATA is used to send data from a device to a

µ

P. The only device from which data can be received via SPI RECEIVE DATA is the EEPROM (U0104 or

U0107).

On the controller there are three ICs on the SPI BUS, ASFIC (U0201-F2), EEPROM (U0104-1 or www.myradio168.net

FRAC-N Synthesizer. The SPI TRANSMIT DATA and CLK lines going to the RF section are filtered by L0131/L0132 to minimize noise. The chip select lines for the IC´s are decoded by the address decoder U0105.

The SPI BUS is also used for the control head. U0106-2,3 buffer the SPI TRANSMIT DATA and CLK lines to the control head. U0106-1 switch off the CLK signal for the LCD display if it is not selected via LCD CE and Q0141.

When the

µ

P needs to program any of these IC’s it brings the chip select line for that IC to a logic 0 and then sends the proper data and clock signals. The amount of data sent to the various IC’s are different, for example the FRAC-N can receive up to 13 bytes (97 bits) while the DAC can receive up to 3 bytes (24 bits). After the data has been sent the chip select line is returned to a logic 1.


Open Controller

2.10

SPEB Serial Interface

The SBEP serial interface allows the radio to communicate with the Dealer Programming Software

(DPS) via the Radio Interface Box (RIB). This interface connects to the accessory connector J0400-

6 and comprises BUS+ (J0101-15). The line is bi-directional, meaning that either the radio or the

DPS can drive the line.

When the RIB (Radio Interface Box) is connected to the radio, a voltage on the HOOK RSS line above 6 volts switches on Q0105. The low state at collector of Q0105 switches Q0104 off and in turn, Q0106 on. A high to low transition at the collector of Q0106 generates an interrupt via µP pin

61. The µP determines the interrupt source by reading a high at the collector of Q0104 via µP pin 6 and R0125. The switched on Q0105 also switches off Q0122 enabling the µP to read BUS+ via pin

78 and to write BUS+ via pin 79 and transistors Q0123,Q0121. While the radio is sending serial data at pin 79 via Q0123 and Q0121 it receives an “echo” of the same data at pin 78.

When the voltage on the HOOK RSS line is below 6 volts (RIB is not connected), the high collector of Q0105 turns on Q0122. The low collector of Q0122 prevents the µP from writing data to BUS+ via

Q0123. In this mode line BUS+ is used for signal SCI RX of the Serial Communication Interface

(SCI). The µP reads the SCI via signal SCI RX (pin 78) and writes via signal SCI TX (pin 79). Both signals are available on the accessory connector J0400 (SCI DATA OUT, SCI DATA IN).

2.11

General Purpose Input/Output

The Controller provides one general purpose line (GP I/O) available on the accessory connector

J0400-12 to interface to external options. The software and the hardware configuration of the radio model defines the function of the port. The port uses an output transistor (Q0432) controlled by µP via ASFIC port GCB3 (pin B3).

An external alarm output, available on J0400 pin 4 is generated by the µP via ASFIC port GCB1 (pin

K3) and transistor Q0411. Input EXTERNAL PTT on J0400 pin 3 is read by the µP via line REAR

PTT and µP pin 8.

2.12

Normal Microprocessor Operation

For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory. In normal operation of the radio the µP is operating in expanded mode as described below. www.myradio168.net

In expanded mode on this radio, the µP (U0101) has access to three external memory devices;

U0102 (FLASH EEPROM), U0103 (SRAM), U0104 or U0107 (optional EEPROM). Also, within the

µP there are 768 bytes of internal RAM and 640 bytes of internal EEPROM, as well as logic to select external memory devices.

The (optional) external EEPROM (U0104 or U0107) as well as the µP’s own internal EEPROM space contain the information in the radio which is customer specific, referred to as the codeplug.

This information consists of items such as: 1) what band the radio operates in, 2) what frequencies are assigned to what channel, and 3) tuning information. In general tuning information and other more frequently accessed items are stored in the internal EEPROM (space within the 68HC11K1), while the remaining data is stored in the external EEPROM. (See the particular device subsection for more details.)


4-6

Open Controller

The external SRAM (U0103) as well as the µP’s own internal RAM space are used for temporary calculations required by the software during execution. All of the data stored in both of these locations is lost when the radio powers off (See the particular device subsection for more details).

The FLASH EEPROM contains the actual Radio Operating Software. This software is common to all open architecture radios within a given model type. For example Securenet radios may have a different version of software in the FLASH EEPROM than a non-secure radio (See the particular device subsection for more details).

The K1

µ

P provides an address bus of 16 address lines (A0-A15), and a data bus of 8 data lines (D0-

D7). There are also three control lines; CSPROG (U0101-29) to chip select U0102-30 (FLASH

EEPROM), CSGP2 (U0101-28) to chip select U0103-20 (SRAM) and PG7_R_W to select whether to read or to write. All other chips (ASFIC/PENDULLUM/DAC/FRACN/LCD/LED/optional EEPROM/

OPTION BOARD) are selected by 3 lines of the µP using address decoder U0105. When the µP is functioning normally, the address and data lines should be toggling at CMOS logic levels.

Specifically, the logic high levels should be between 4.8 and 5.0 V, and the logic low levels should be between 0 and 0.2 V. No other intermediate levels should be observed, and the rise and fall times should be <30 ns.

The low-order address lines (A0-A7) and the data lines (D0-D7) should be toggling at a high rate, i.e., you should set your oscilloscope sweep to 1 us/div. or faster to observe individual pulses. High speed CMOS transitions should also be observed on the µP control lines.

On the µP the lines XIRQ (U0101-30), MODA LIR (U0101-77), MODB VSTPY (U0101-76) and

RESET (U0101-75) should be high at all times during normal operation. Whenever a data or address line becomes open or shorted to an adjacent line, a common symptom is that the RESET line goes low periodically, with the period being in the order of 20 msecs. In the case of shorted lines you may also detect the line periodically at an intermediate level, i.e. around 2.5 V when 2 shorted lines attempt to drive to opposite rails.

The MODA LIR (U0101-77) and MODB VSTPY (U0101-76) inputs to the µP must be at a logic 1 for it to start executing correctly. After the µP starts execution it will periodically pulse these lines to determine the desired operating mode. While the Central Processing Unit (CPU) is running, MODA

LIR is an open-drain CMOS output which goes low whenever the µP begins a new instruction (an instruction typically requires 2-4 external bus cycles, or memory fetches).

However, since it is an open-drain output, the waveform rise assumes an exponential shape similar to an RC circuit.

There are eight analogue to digital converter ports (A/D) on U0101. They are labelled within the www.myradio168.net

and convert that level to a number ranging from 0 to 255 which can be read by the software to take appropriate action.

For example, U0101-46 is the battery voltage detect line. R0641 and R0642 form a resistor divider on SWB+. With 30K and 10K and a voltage range of 11 V to 17 V, that A/D port would see 2.74 V to

4.24 V which would then be converted to ~140 to 217 respectively.

U0101-51 is the high reference voltage for the A/D ports on the µP. Resistor R0106 and capacitor

C0106 filter the +5 V reference. If this voltage is lower than +5 V the A/D readings will be incorrect.

Likewise U0101-50 is the low reference for the A/D ports. This line is normally tied to ground. If this line is not connected to ground, the A/D readings will be incorrect.


Open Controller

Capacitors C0104, C0105, C0113, C0114 serve to filter out any AC noise which may ride on +5V at

U0101.

Input IRQ (U101-61) generates an interrupt, if either HOOK RSS (J0101-3) is higher than 6V (SBEP communication) and turns Q0106 on via Q0105, Q0104, or a low at the option interrupt pin (J0103-

8) turns Q0124 off and Q0125 on. The µP determines the interrupt source by reading the collector of

Q0104 via U0101-6 and the collector Q0124 via U0101-7.

2.13

FLASH Electronically Erasable Programmable Memory

(FLASH EEPROM)

The 256 KByte FLASH EEPROM (U0102) contains the radio operating software. This software is common to all open architecture radios within a given model type. This is, as opposed to the codeplug information stored in EEPROM (U0104) which could be different from one user to another in the same company.

In normal operating mode, this memory is only read, not written to. The memory access signals (CE,

OE and WE) are generated by the µP.

To upgrade/reprogram the FLASH software, the µP must be set in bootstrap operating mode, and the FLASH device pin (U0102-9) V pp

must be between 11.4 and 12.6 V. Taking diode D0102 into account, the voltage at J400-12 to enable FLASH programming may range between 12.1 and 13.1V.

This voltage also switches Q0102 on and in turn Q0103 off. The low state at collector of Q0102 pulls

MODA LIR (U0101-77) and MODB VSTBY (U0101-76) via diode D0101 to low which enables the bootstrap operating mode after power up. The high state at collector of Q0103 enables the µP to control the FLASH EN OE (U0102-32) input via U0106-4. Chip select (U103-30) and read or write operation (U103-7) are controlled by µP pins 29 and 33. In normal operating mode V

PP

is below 5V which switches Q0102 off and Q0103 on.

Resistor divider pair R0132 and R0133 set up 4.1 V on U0102-9 which reduces the chance of logic transitions. The FLASH device may be reprogrammed 1,000 times without issue. It is not recommended to reprogram the FLASH device at a temperature below 0°C.

Capacitor C0131 serves to filter out any AC noise which may ride on +5V at U0101, and C0132 filters out any AC noise on V pp

.

2.14

Electrically Erasable Programmable Memory (EEPROM)

www.myradio168.net

operating frequency and signalling features, commonly known as the codeplug. It is also used to store radio operating state parameters such as current mode and volume. U0104 can have up to

8Kbyte and U0107 up to 16 Kbyte. This memory can be written to in excess of 100,000 times and will retain the data when power is removed from the radio. The memory access signals (SI, SO and

SCK) are generated by the µP and chip select (CS) is generated by address decoder U0105-4.

Additional EEPROM is contained in the µP (U0101). This EEPROM is used to store radio tuning and alignment data. Like the external EEPROM this memory can be programmed multiple times and will retain the data when power is removed from the radio.

Note:

The external EEPROM plus the 640 bytes of internal EEPROM in the 68HC11K1 comprise the complete codeplug.


4-8

Open Controller

2.15

Static Random Access Memory (SRAM)

The SRAM (U0103) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles. SRAM accesses are indicated by the CS signal U103-20 (which comes from U101-CSGP2) going low. U0103 is commonly referred to as the external RAM as opposed to the internal RAM which is the 768 bytes of RAM which is part of the 68HC11K1. Both RAM spaces serve the purpose.

However, the internal RAM is used for the calculated values which are accessed most often.

Capacitor C0133 serves to filter out any ac noise which may ride on +5V at U0103.

2.16

Blank Control Head

The blank control head provides the connector to the hand held control mic or head.

2.16.1

Power Supplies

The power supply to the Control Head is taken from the host radio’s FLT A+ voltage via connector

J0801(K2) / J0901(K3) pin 2 and the regulated +5V via connector J0801(K2) / J0901(K3) pin 10.

The voltage FLT A+ is at battery level and is used for the LEDs, the back light and to power up the radio via the On / Off button. The stabilized +5 volt is used for the (display, the display driver,-K3 only) the shiftregister and the keypad buttons.

2.16.2

Power On / Off

The On/Off button when pressed switches the radio’s voltage regulators on by pulling ON OFF

CONTROL to high via D0825(K2) / D0925(K3) and connects the base of D0825(K2) / D0925(K3) to

FLT A+. This transistor pulls the line ANALOG 3 to low to inform the µP that the On/Off button is pressed. If the radio is switched off, the µP will switch it on and vice versa. If the On/Off button is pressed and held while the radio is on, the software detects a low state on line ANALOG 3 and switches the radio off.

2.16.3

Electrostatic Transient Protection

Electrostatic transient protection is provided for the sensitive components in the Control Head by diodes VR0801 - VR0809(K2) / VR0901 - VR0909(K3). The diodes limit any transient voltages to tolerable levels. The associated capacitors provide Radio Frequency Interference (RFI) protection.

www.myradio168.net

2.16.4

Reversible Control Head

The control head is connected to the RF transceiver by means of a short flexible ribbon cable. This allows the control head to be mounted either way up in relation to the body of the transceiver. This means that the transceiver can be mounted in the most cosmetically pleasing and most efficient cooling orientation and still have the user interface the “right way” up.


General

CONTROLLER BOARD AUDIO AND SIGNALLING CIRCUITS

3.0

General

3.1

Audio Signalling Filter IC (ASFIC)

The ASFIC (U0201) used in the controller has 4 functions;

RX/TX audio shaping, i.e. filtering, amplification, attenuation

RX/TX signalling, PL/DPL/HST/MDC/MPT

Squelch detection

Microprocessor clock signal generation (see Microprocessor Clock Synthesizer Description

Block).

The ASFIC is programmable through the SPI BUS (U0201-E3/F1/F2), normally receiving 21 bytes.

This programming sets up various paths within the ASFIC to route audio and/or signalling signals through the appropriate filtering, gain and attenuator blocks. The ASFIC also has 6 General Control

Bits GCB0-5 which are CMOS level outputs and used for AUDIO PA ENABLE (GCB0) to switch the audio PA on and off, EXTERNAL ALARM (GCB1) and B+ CONTROL (GCB2) to switch the voltage regulators (and the radio) on and off. GCB3 controls output GPI/O (accessory connector J0400-12),

HIGH LOW BAND (GCB4) can be used to switch between band splits and GCB5 is available on the option board connector J0102-3. The supply voltage for the ASFIC has additional filtering provided by Q0200, D0200, R0200, L0200 and C0200. Diode D0200 increases the voltage at the base of

Q0200 about 0.6 volts above the 5 volt supply voltage to compensate the base - emitter voltage drop of Q0200.

4.1

3.2

Audio Ground

VAG is the dc bias used as an audio ground for the op-amps that are external to the Audio Signalling

Filter IC (ASFIC). U0251-1 form this bias by dividing 9.3V with resistors R0251, R0252 and buffering the 4.65V result with a voltage follower. VAG emerges at pin 1 of U0251-1. C0253 is a bypass capacitor for VAG. The ASFIC generates its own 2.5V bias for its internal circuitry. C0221 is the bypass for the ASFIC’s audio ground dc bias. Note that while there are ASFIC VAG, and BOARD

VAG (U0201-1) each of these are separate. They do not connect together.

4.0

www.myradio168.net

Refer to Figure 4.1 for reference for the following sections.

Mic Input Path

The radio supports two distinct microphone paths known as internal (from Control Head) and external mic (from accessory connector J0400-2) and an auxiliary path (FLAT TX AUDIO). The microphones used for the radio require a DC biasing voltage provided by a resistive network.

These two microphone audio inputs are connected together through R0413; resistors R0414 and

R0415 are not placed. Following the internal mic path; the microphone is plugged into the radio control head and is connected to the controller board via J101-16.


Transmit Audio Circuits

From here the signal is routed to R0206. R0204 and R0205 provide the 9.3VDC bias and R0206 provides input protection for the CMOS amplifier input. R0205 and C0209 provide a 1kohm AC path to ground that sets the input impedance for the microphone and determines the gain based on the emitter resistor in the microphone’s amplifier circuit.

J0101

MIC

16

CONTROL HEAD

CONNECTOR

J0400

EXT MIC

FLAT TX

AUDIO

ACCESSORY

CONNECTOR

2

5

A6

MIC AMP OUT

J0103-3

IN

OPTION

BOARD

OUT

J0103-1

C7

TX IN

B8

MIC

IN

A7

EXT

MIC

IN

D7

AUX

TX IN

MIC

IN

PRE EMP OUT

C8

FILTERS AND

PREEMPHASIS

ASFIC U0201

LS SUMMER

SPLATTER

FILTER

HS SUMMER

LIMITER

VCO

ATN

ATTENUATOR

H8

MOD IN

TO

RF

SECTION

(SYNTHESIZER)

LIM IN

E8

GEPD 5426-1

4.2

Figure 1a Transmit Audio Paths (Open Architecture Radios)

Figure 4.1

Transmit Audio Paths www.myradio168.net

and C0211 serves as a DC blocking capacitor. The audio signal at U0201-B8 should be approximately 80mV for 1.5kHz or 3kHz of deviation with 12.5kHz or 25 kHz channel spacing.

The FLAT TX AUDIO signal from accessory connector J0400-5 is buffered by op-amp U0202-1 and fed to the ASFIC U0201-D7 through C0205.

External Mic Path

The external microphone signal enters the radio on accessory connector J0400 pin 2 and connects to the standard microphone input through R0413. Components R0414 - R0416, C0413, C0414,

C0417 are not used.

4-10 Theory of Operation


4.3

PTT Sensing and TX Audio Processing

Mic PTT coming from the Control Head via connector J101-4 is sensed by the µP U0101 pin 22. An external PTT can be generated by grounding pin 3 on the accessory connector. When microphone

PTT or external PTT is sensed, the µP will always configure the ASFIC for the internal mic audio path.

Inside the ASFIC, the MIC audio is filtered to eliminate frequency components outside the 300-

3000Hz voice band, pre-emphasized if pre-emphasis is enabled. The capacitor between ASFIC preemphasis out U0201-C8 and ASFIC limiter in U0201-E8 AC couples the signal between ASFIC blocks and prevents the DC bias at the ASFIC output U0201-H8 from shifting when the ASFIC transmit circuits are powered up. The signal is then limited to prevent the transmitter from over deviating. The limited MIC audio is then routed through a summer which, is used to add in signalling data, and then to a splatter filter to eliminate high frequency spectral components that could be generated by the limiter. The audio is then routed to two attenuators, which are tuned in the factory or the field to set the proper amount of FM deviation. The TX audio emerges from the ASFIC at

U0201-H8 MOD IN, at which point it is routed to the RF section.

5.0


Refer to Figure 4.2 for reference for the following sections. From a hardware point of view, there are three types of signalling:

1.

2.

3.

Sub-audible data (PL/DPL/Connect Tone) that gets summed with transmit voice or signalling,

DTMF data for telephone communication in trunked and conventional systems, and

Audible signalling including Select 5, MPT-1327, MDC, High speed Trunking.

NOTE:

All three types are supported by the hardware while the radio software determines which signalling type is available.

HS

SUMMER

MICRO

5

7

G1

HIGH SPEED

CLOCK IN

CLOCK

CONTROLLER

5-3-2 STATE

ENCODER

DTMF

ENCODER

SPLATTER

FILTER

U0101

ASFIC U0201

6 C3 LOW SPEED

CLOCK

PL

ENCODER

LS

SUMMER

ATTENUATOR

H8

MOD IN

TO RF

SECTION

(SYNTHESIZER)

GEPD 5433

Figure 4.2

Transmit Signalling Paths



5.1

5.2

5.3

Sub-audible Data (PL/DPL)

Sub-audible data implies signalling whose bandwidth is below 300Hz. PL and DPL waveforms are used for conventional operation and connect tones for trunked voice channel operation. The trunking connect tone is simply a PL tone at a higher deviation level than PL in a conventional system.

Although it is referred to as ”sub-audible data,” the actual frequency spectrum of these waveforms may be as high as 250 Hz, which is audible to the human ear. However, the radio receiver filters out any audio below 300Hz, so these tones are never heard in the actual system.

Only one type of sub-audible data can be generated by U0201 (ASFIC) at any one time. The process is as follows, using the SPI BUS, the

µ

P programs the ASFIC to set up the proper lowspeed data deviation and select the PL or DPL filters. The

µ

P then generates a square wave which strobes the ASFIC PL / DPL encode input PL CLK U0201-C3 at twelve times the desired data rate.

For example, for a PL frequency of 103Hz, the frequency of the square wave would be 1236Hz.

This drives a tone generator inside U0201 which generates a staircase approximation to a PL sine wave or DPL data pattern. This internal waveform is then low-pass filtered and summed with voice or data. The resulting summed waveform then appears on U0201-H8 (MOD IN), where it is sent to the RF board as previously described for transmit audio. A trunking connect tone would be generated in the same manner as a PL tone.

High Speed Data

High speed data refers to the 3600 baud data waveforms, known as Inbound Signalling Words

(ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC (U0201) to the proper filter and gain settings. It then begins strobing U0201-G1 (TRK CLK IN) with a pulse when the data is supposed to change states. U0201’s 5-3-2 State Encoder (which is in a 2-state mode) is then fed to the postlimiter summer block and then the splatter filter.

From that point it is routed through the modulation attenuators and then out of the ASFIC to the RF board. MPT 1327 and MDC are generated in much the same way as Trunking ISW. However, in some cases these signals may also pass through a data pre-emphasis block in the ASFIC. Also these signalling schemes are based on sending a combination of 1200 Hz and 1800 Hz tones only.

Microphone audio is muted during High Speed Data signalling.

Dual Tone Multiple Frequency (DTMF) Data

www.myradio168.net

tones which are heard when using a “Touch Tone” telephone.

There are seven frequencies, with four in the low group (697, 770, 852, 941Hz) and three in the high group (1209, 1336, 1477Hz).

The high-group tone is generated by the µP (U0101-5) strobing U0201-G1 at six times the tone frequency for tones less than 1440Hz or twice the frequency for tones greater than 1440Hz. The low group tone is generated by the µP (U0101-7) strobing U0201-G2 (DTMF CLCK) at six times the tone frequency. Inside U0201 the low-group and high-group tones are summed (with the amplitude of the high group tone being approximately 2 dB greater than that of the low group tone) and then preemphasized before being routed to the summer and splatter filter. The DTMF waveform then follows the same path as was described for high-speed data.



6.0



1

9

AUDIO

PA

U0401

4

6

ACCESSORY

CONNECTOR

11

J0400

SPKR +

SPKR -

16

1

FLT RX AUDIO

IN 2

OPTION

BOARD

OUT

IN 1

J0103-5

J0103-4

J0103-2

FROM

RF

SECTION

(IF IC)

ATTEN.

INT

SPKR+

B2

UNIV IO

H5

UNAT RX OUT

J5

EXP AUDIO IN

J4

RX AUD OUT

VOLUME

ATTEN.

H6

RX IN

FILTER AND

DEEMPHASIS

J6

AUX RX IN

J7 PL IN

ASFIC

U0201

PL FILTER

LIMITER

INT

SPKR-

CONTROL

HEAD

CONNECTOR

2

1

J0101

14

HANDSET

AUDIO

PL

LIM

A4

LIMITER, RECTIFIER

FILTER, COMPARATOR

CH ACT

H2

25

SQUELCH

CIRCUIT

SQ DET

43

DET AUDIO

(DISCRIMINATOR AUDIO)

SQ IN

H7

MICRO

CONTROLLER

H1

10

U0101

EXTERNAL

SPEAKER

INTERNAL

SPEAKER

GEPD 5428-1

Figure 4.3

Receive Audio Paths.

6.1

The radio’s RF circuits are constantly producing an output at the discriminator U5201-28 (UHF) /

U5201-28 (VHF) / U8201-28 (300MHz-R1). This signal (DET AUDIO) is routed to the ASFIC’s squelch detect circuitry input SQ IN (U0201-H7). All of the squelch detect circuitry is contained within the ASFIC. Therefore from a user’s point of view, DET AUDIO enters the ASFIC, and the

ASFIC produces two CMOS logic outputs based on the result. They are CH ACT (U0201-H2) and

SQ DET (U0201-H1).

The squelch signal entering the ASFIC is amplified, filtered, attenuated, and rectified. It is then sent to a comparator to produce an active high signal on CH ACT. A squelch tail circuit is used to produce

SQ DET (U0201-H1) from CH ACT. The state of CH ACT and SQ DET is high (logic 1) when carrier is detected, otherwise low (logic 0).



6.2

6.3

CH ACT is routed to the µP pin 25 while SQ DET adds up with LOCK DET, weighted by resistors

R0113, R0114, and is routed to one of the µP´s ADC inputs U0101-43. From the voltage weighted by the resistors the µP determines whether SQ DET, LOCK DET or both are active.

SQ DET is used to determine all audio mute/unmute decisions except for Conventional Scan. In this case CH ACT is a pre-indicator as it occurs slightly faster than SQ DET.

Audio Processing and Digital Volume Control

The receiver audio signal enters the controller section from the IF IC U5201-28 on DET AUDIO and passes through RC filter, R0203 and C0208 which filters out IF noise. The signal is AC coupled by

C0207 and enters the ASFIC via the PL IN pin U0201-J7.

Inside the ASFIC, the signal goes through 2 paths in parallel, the audio path and the PL/DPL path.

The audio path has a programmable amplifier, whose setting is based on the channel bandwidth being received, then a LPF filter to remove any frequency components above 3000Hz and then an

HPF to strip off any sub-audible data below 300Hz. Next, the recovered audio passes through a deemphasis filter if it is enabled (to compensate for Pre-emphasis which is used to reduce the effects of FM noise). The IC then passes the audio through the 8-bit programmable attenuator whose level is set depending on the value of the volume control. Finally the filtered audio signal passes through an output buffer within the ASFIC. The audio signal exits the ASFIC at RX AUDIO (U0201-J4).

The

µ

P programs the attenuator, using the SPI BUS, based on the volume setting. The minimum / maximum settings of the attenuator are set by codeplug parameters.

Since sub-audible signalling is summed with voice information on transmit, it must be separated from the voice information before processing. Any sub-audible signalling enters the ASFIC from the

IF IC at PL IN U0201-J7. Once inside it goes through the PL/DPL path.

The signal first passes through one of 2 low pass filters, either PL low pass filter or DPL/LST low pass filter. Either signal is then filtered and goes through a limiter and exits the ASFIC at PL LIM

(U0201-A4). At this point the signal will appear as a square wave version of the sub-audible signal which the radio received. The microprocessor (U0101-10) will decode the signal directly to determine if it is the tone/code which is currently active on that mode.

Audio Amplification Speaker (+) Speaker (-)

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by R0401 and R0402 to set the correct input level to the audio PA (U0401). This is necessary because the gain of the audio PA is 46 dB, and the ASFIC output is capable of overdriving the PA unless the maximum volume is limited.

The audio then passes through C0401 which provides AC coupling and low frequency roll-off.

C0402 provides high frequency roll-off as the audio signal is routed to pins 1 and 9 of the audio power amplifier U0401.

The audio power amplifier has one inverted and one non-inverted output that produces the differential audio output SPK+ / SPK- (U0401-4/6). The inputs for each of these amplifiers are pins 1 and 9 respectively; these inputs are both tied to the received audio. The audio PA’s DC biases are not activated until the audio PA is enabled at pin 8.



6.4

The audio PA is enabled via AUDIO PA ENABLE signal from the ASFIC (U0201-B5). When the base of Q0401 is low, the transistor is off and U0401-8 is high, using pull up resistor R0406, and the Audio

PA is ON. The voltage at U0401-8 must be above 8.5VDC to properly enable the device. If the voltage is between 3.3 and 6.4V, the device will be active but has its input (U0401-1/9) off. This is a mute condition which is not employed in this radio design. R0404 ensures that the base of Q0401 is high on power up. Otherwise there may be an audio pop due to R0406 pulling U0401-8 high before the software can switch on Q0401.

The SPK+ and SPK- outputs of the audio PA have a DC bias which varies proportionately with FLT

A+ (U0401-7). FLT A+ of 11V yields a DC offset of 5V, and FLT A+ of 17V yields a DC offset of 8.5V.

If either of these lines is shorted to ground, it is possible that the audio PA will be damaged. SPK+ and SPK- are routed to the accessory connector (J400-16 and 1) and to the control head (connector

J0101-1 and 2).

Filtered Audio

The ASFIC has an audio whose output at U0201-B2 has been filtered and de-emphasized, but has not gone through the digital volume attenuator. From ASFIC U0201-B2 the signal is AC coupled to

U0202-2 by capacitor C0230. R0224 and R0225 determine the gain of op-amp U0202-2. The output of U0202-2 is the routed to J0400-11.Note that any volume adjustment of the signal on this path must be done by the accessory.

7.0



C3

LOW SPEED

CLOCK

6

G1

HIGH SPEED

CLOCK

DATA FILTER

AND DEEMPHASIS

LIMITER

G4

11

MICRO

RX

LIM

FILTER

ASFIC

U0201

LIMITER

OUT

DET AUDIO

DISCRIMINATOR AUDIO

FROM RF SECTION

J7

PL

IN www.myradio168.net

CONTROLLER

U0101

LOW SPEED

LIM CAP

RX LIM

CAP

J3 C5

GEPD 5431

5

Figure 4.4

Receive Signalling Path.



7.1

7.2

Sub-audible Data (PL/DPL) and High Speed Data Decoder

The ASFIC (U0201) is used to filter and limit all received data. The data enters the ASFIC at U0201-

J7. Inside U0201 the data is filtered according to data type (HS or LS), then it is limited to a 0-5V digital level. The MDC and trunking high speed data appear at U0201-G4, where it connects to the

µP U0101-11

The low speed limited data output (PL, DPL, and trunking LS) appears at U0201-A4, where it connects to the µP U0101-10. While receiving low speed data, the µP may output a sampling waveform, depending on the sampling technique, to U0201-C3 between 1 and 2 kHz.

The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC stores one bit every clock cycle. The external capacitors C0226, C0225, and C0223 set the low frequency pole for a zero crossings detector in the limiters for PL and HS data. The hysteresis of these limiters is programmed based on the type of received data. Note that during HS data the µP may generate a sampling waveform seen at U0201-G1.

Alert Tone Circuits

When the software determines that it needs to give the operator an audible feedback (for a good key press, or for a bad key press), or radio status (trunked system busy, phone call, circuit failures), it sends an alert tone to the speaker.

It does so by sending SPI BUS data to U0201 which sets up the audio path to the speaker for alert tones. The alert tone itself can be generated in one of two ways: internally by the ASFIC, or externally using the

µ

P and the ASFIC.

The allowable internal alert tones are 304, 608, 911, and 1823Hz. In this case a code contained within the SPI BUS load to the ASFIC sets up the path and determines the tone frequency, and at what volume level to generate the tone. (It does not have to be related to the voice volume setting).

For external alert tones, the µP can generate any tone within the 100-3000Hz audio band. This is accomplished by the µP generating a square wave which enters the ASFIC at U0201-C3.

Inside the ASFIC, this signal is routed to the alert tone generator. The output of the generator is summed into the audio chain just after the RX audio de-emphasis block. Inside U0201 the tone is amplified and filtered, then passed through the 8-bit digital volume attenuator, which is typically loaded with a special value for alert tone audio. The tone exits at U0201-J4 and is routed to the audio PA like receive audio.

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4

300MHz SPECIFIC CIRCUIT DESCRIPTION

8.0


The receiver is able to cover the range from 336 to 390 MHz. It consists of four major blocks: frontend, mixer, first IF section and IF IC. Antenna signal pre-selection is performed by two varactor tuned bandpass filters. A double balanced schottky diode mixer converts the signal to the first IF at

45.1 MHz.

Two crystal filters in the first IF section and two ceramic filters in the second IF section provide the required selectivity. The second IF at 455 kHz is mixed, amplified and demodulated in the IF IC. The processing of the demodulated audio signal is performed by an audio processing IC located in the controller section.

8.1

Front-End Band-Pass Filter & Pre-Amplifier

A two pole pre-selector filter tuned by the varactor diodes D8301 and D8302 pre-selects the incoming signal (PA RX) from the antenna switch to reduce spurious effects to following stages. The tuning voltage (FE CNTL VLTG) ranging from 2 volts to 8 volts is controlled by a Digital to Analog (D/

A) converter (U0731-11) in the controller section. A dual hot carrier diode (D8303) limits any inband signal to 0 dBm to prevent damage to the pre-amplifier.

The RF pre-amplifier is an SMD device (Q8301) with collector base feedback to stabilize gain, impedance, and intermodulation. The collector current of approximately 11-16 mA is drawn from the voltage 9V3 via L8302 and R8302.

A second two pole varactor tuned bandpass filter provides additional filtering to the amplified signal.

The varactor diodes D8304 and D8305 are controlled by the same signal which controls the preselector filter. A following 1 dB pad (R8310, R8314, R8316) stabilizes the output impedance and intermodulation performance. If the radio is configured for a base station application, R8319 is not placed, and TP8301 and TP8302 are shorted.

8.2

Mixer and Intermediate Frequency (IF) Section

The signal coming from the front-end is converted to the first IF (45.1 MHz) using a double balanced schottky diode mixer (D8401). Its ports are matched for incoming RF signal conversion to the 45.1 www.myradio168.net

approximately 10 dBm.

The mixer IF output signal (RX IF) from transformer T8401 pin 2 is fed to the first two pole crystal filter Y5201. The filter output in turn is matched to the following IF amplifier.

The IF amplifier Q5201 is actively biased by a collector base feedback (R5201, R5202) to a current drain of approximately 5 mA drawn from the voltage 5V STAB. Its output impedance is matched to the second two pole crystal filter Y5202. A dual hot carrier diode (D5201) limits the filter output voltage swing to reduce overdrive effects at RF input levels above -27 dBm.



8.3

IF IC (U5201)

The first IF signal from the crystal filters feeds the IF IC (U5201) at pin 6. Within the IF IC the

45.1MHz first IF signal mixes with the second local oscillator (LO) at 44.645MHz to the second IF at

455 kHz. The second LO uses the external crystal Y5211. The second IF signal is amplified and then filtered by two external ceramic filters (FL5201, FL5202). Back in the IF IC the signal is demodulated in a phase-lock detector and fed from IF IC pin 28 to the audio processing circuit ASFIC U0201 located in the controller section (line DET AUDIO).

The squelch circuit of the IF IC is not used. Instead the squelch circuit inside the audio processing

IC ASFIC (U0201) determines the squelch performance and sets the squelch threshold. The detector output signal from IF IC (U5201) pin 28 (DET AUDIO) is fed to the ASFIC pin H7.

At IF IC pin 11 an RSSI signal is available with a dynamic range of 70 dB. The RSSI signal is used by the ASFIC (U0201 pin G8) and after buffering by op-amp U0202-3 available at accessory connector J0400-15.

9.0


The radio’s 5-25 W PA is a four stage amplifier used to amplify the output from the exciter to the radio transmit level. It consists of four stages in the line-up. The first (Q8510) is a bipolar stage that is controlled via the PA control line. It is followed by another bipolar stage (Q8520), a MOS FET stage

(Q8530, Q8531) and a final bipolar stage (Q8540).

Devices Q8510, Q8520,Q8530 and Q8531 are surface mounted. Bipolar Transistor Q8540 is directly attached to the heat sink.

9.1

Power Controlled Stage

The first stage (Q8510) amplifies the RF signal from the VCO (line EXCITER PA) and controls the output power of the PA. The output power of the transistor Q8510 is proportional to its collector current which is adjusted by a voltage controlled current source consisting of Q8612 and Q8621.

The whole stage operates off the K9V1 source which is 9.1V in transmit mode and nearly 0V in receive mode.

The collector current of Q8510 causes a voltage drop across the resistors R8623 and R8624.

Transistor Q8612 adjusts the voltage drop across R8621 through PA control line (PWR CNTL). The www.myradio168.net

VBE (0.6V) of Q8611. If the voltage of PWR CNTL is raised, the base voltage of Q8612 will also rise causing more current to flow to the collector of Q8612 and a higher voltage drop across R8621. This in turn results in more current driven into the base of Q8510 by Q8621 so that the current of Q8510 is increased. The collector current settles when the voltage over the series configuration of R8623 and R8624 plus VBE of Q8621 equals the voltage over R8621 plus VBE (0.6V) of Q8611. By controlling the output power of Q8510 and in turn the input power of the following stages the ALC loop is able to regulate the output power of the transmitter. Q8611 is used for temperature compensation of the PA output power.



9.2

9.3

9.4

PA Stages

The bipolar transistor Q8520 is driven by Q8510. To reduce the collector-emitter voltage and in turn the power dissipation of Q8510 its collector current is drawn from the antenna switch circuit.

In transmit mode the base of Q8520 is slightly positive biased by a divided K9V1 signal. This bias along with the rf signal from Q8510 allows a collector current to be drawn from the antenna switch circuit and in turn switches the antenna switch to transmit, while in receive mode the low K9V1 signal with no rf signal present cuts off the collector current and in turn switches the antenna switch to receive.

The following stage uses two enhancement mode N-Channel MOS FET devices (Q8530, Q8531) and requires for each device a positive gate bias and a quiescent current flow for proper operation.

The voltages of the lines BIAS VLTG and BIAS VLTG 2 are set in transmit mode by two Digital to

Analog (D/A) converters (U0731-4, U0731-11) and fed to the gates of Q8531 and Q8530 via two resistive dividers. The bias voltages are tuned in the factory. If one or both transistor are replaced, the bias voltages must be tuned with the Dealer Programming Software (DPS). Care must be taken, not to damage any device by exceeding the maximum allowed bias voltage. The collector currents are drawn from the supply voltage A+ via L8531 and L8532.

The final stage uses the bipolar device Q8540 and operates off the A+ supply voltage. For class C operation the base is DC grounded by two series inductors (L8533, L8534). A matching network consisting of C8541-C8544 and two striplines transform the impedance to 50 Ohms and feed the directional coupler.

Directional Coupler

The directional coupler is a microstrip printed circuit which couples a small amount of the forward power off the rf power from Q8541. The coupled signal is rectified to an output power proportional negative DC voltage by the diode D8553 and sent to the power control circuit in the controller section via the line PWR DETECT for output power control. The power control circuit holds this voltage constant, thus ensuring the forward power out of the radio to be held to a constant value.

Antenna Switch

The antenna switch is switched synchronously with the K9V1 voltage and feeds either the antenna signal coming through the harmonic filter to the receiver or the transmitter signal coming from the PA to the antenna via the harmonic filter.

www.myradio168.net

In transmit mode, this K9V1 voltage is high and biases Q8520 and, along with the rf signal from

Q8510, allows a collector current to be drawn. The collector current of Q8520 drawn from A+ flows via L8542, L8541, directional coupler, D8551, L8551, D8631, L8631, R8616, R8617 and L8611 and switches the PIN diodes D8551 and D8631 to the low impedance state. D8551 leads the rf signal from the directional coupler to the harmonic filter. The low impedance of D8631 is transformed to a high impedance at the input of the harmonic filter by the resonant circuit formed by L8551, C8633 and the input capacitance of the harmonic filter.

In receive mode the low K9V1 and no rf signal present from Q8510 turn off the collector current of

Q8520. With no current drawn by Q8520 and resistor R8615 pulling the voltage at PIN diode D8631 to A+ both PIN diodes are switched to the high impedance state. The antenna signal, coming through the harmonic filter, is channelled to the receiver via L8551, C8634 and line PA RX.



9.5

9.6

A high impedance resonant circuit formed by D8551 in off state and L8554, C8559 prevents an influence of the receive signal by the PA stages. The high impedance of D8631 in off state doesn´t influence the receiver signal.

Harmonic Filter

The transmitter signal from the antenna switch is channelled through the harmonic filter to the antenna connector J8501.The harmonic filter is formed by inductors L8552, L8553, and capacitors

C8551 through C8554. This network forms a low-pass filter to attenuate harmonic energy of the transmitter to specifications level. R8550 is used for electro-static protection.

Power Control

The power control loop regulates transmitter power with an automatic level control (ALC) loop and provides protection features against excessive control voltage and high operating temperatures.

MOS FET device bias, power and control voltage limit are adjusted under microprocessor control using a Digital to Analog (D/A) converter (U0731). The microprocessor writes the data into the D/A converter via serial interface (SRL) composed of the lines SPI CLCK SRC (clock), SPI DATA SRC

(data) and DAC CE (chip enable). The D/A adjustable control voltage limit increases transmitter rise time and reduces adjacent channel splatter as it is adjusted closer to the actual operating control voltage.

The microprocessor controls K9V1 ENABLE (U0101-3) to switch on the first and the second PA stage via transistors Q0741, Q0742 and signal K9V1. The antenna switch is turned on by the collector current of the second PA stage. In TX mode the front-end control D/A (U0731-11) is used for BIAS VOLTAGE 2 (via R0736) and K9V1 ENABLE pulls signal FE CNTL VLTG to ground via

Q0743. PA DISABLE, also microprocessor controlled (U0101-26), sets BIAS VLTG (U0731-4) and

VLTG LIMIT SET (U0731-13) via D0731 and BIAS VLTG 2 via D0733 in receive mode to low to switch off the biases of the MOS FET devices Q8530, Q8531 and to switch off the power control voltage (PWR CNTL).

Through an Analog to Digital (A/D) input (VLTG LIMIT) the microprocessor can read the PA control voltage (PWR CNTL) during the tuning process.The ALC loop regulates power by adjusting the PA control line PWR CNTL to keep the forward power voltage PWR DETECT at a constant level.

Opamp U0701-2 and resistors R0701 to R0703 and R0731 subtract the negative PWR DETECT voltage from the PA PWR SET D/A output U0731 pin 2. The result is connected to opamp inverting www.myradio168.net

U0701-4 pin 10 and controls the output power of the PA via pin 8 and control line PWR CNTL. The

4.6 volt reference VAG is set by a resistive divider circuit (R0251, R0252) which is connected to ground and 9.3 volts, and buffered by opamp U0251-1.

During normal transmitter operation the voltages at the opamp inputs U0701-4 pins 9 and 10 should be equal to 4.6 volts and the PA control voltage output at pin 8 should be between 4 and 7 volts. If power falls below the desired setting, PWR DETECT becomes less negative, causing the output at

U0701-2 pin 7 to decrease and the opamp output U0701-4 pin 8 to increase.

A comparator formed by U0701-4 increases the PA control voltage PA CNTL until PWR DETECT is at the desired level. The power set D/A output voltage PA PWR SET (U0731-2) at U0701-2 pin 5 adjusts power in steps by adjusting the required value of PWR DETECT. As PA PWR SET (U0731-

2) decreases, transmitter power must increase to make PWR DETECT more negative and keep the inverting input U0701-4 pin 9 at 4.6 volts.



Loop frequency response is controlled by opamp feedback components R0712 and C0711. Opamp

U0701-3 compares the power control voltage PWR CNTL divided by resistors R0717 to R0719 with the voltage limit setting VLTG LIMIT SET from the D/A converter (U0731-13) and keeps the control voltage constant via Q0711 if the control voltage, reduced by the resistive divider (R0717 to R0719), approaches the voltage of VLTG LIMIT SET (U0731-13).

Rise and fall time of the output power during transmitter keying and dekeying is controlled by the comparator formed by opamp U0701-3.

During normal transmitter operation the voltage at U701-3 pin 13 is higher than the voltage at pin 12 causing the output at pin 14 being low and switching off transistor Q0711. Diode D0732 reduces the bias voltages BIAS VLTG, BIAS VLTG 2 for low control voltage levels.

The temperature of the PA area is monitored by opamp U0701-1 using thermistor R8641 (located in the PA section). If the temperature increases, the resistance of the thermistor decreases, decreasing the voltage PA TEMP. The inverting amplifier formed by U0701-1 amplifies the PA TEMP voltage and if the voltage at opamp pin 1 approaches 4.6 V plus the voltage (ON) across D0721, U701-1 simulates an increased power which in turn decreases the power control voltage until the voltage at

U0701-4 pin 9 is 4.6V again. During normal transmitter operation the output voltage of opamp U701-

1 pin 1 is below 4.6V. Diode D8601 located in the PA section acts as protection against transients and wrong polarity of the supply voltage.

10.0


The complete synthesizer subsystem consists of the Reference Oscillator (U8702), the Fractional-N synthesizer (U8701), the Voltage Controlled Oscillator (Q8802), the RX and TX buffer stages

(Q8831, Q8851, Q8852, Q8881) and the feedback amplifier (Q8841).

10.1

Reference Oscillator

The Reference Oscillator (Y8702) contains a temperature compensated crystal oscillator with a frequency of 16.8 MHz. An analog to digital (A/D) converter internal to U8701 (FRAC-N) and controlled by the microprocessor via serial interface (SRL) sets the voltage at the warp output of

U8701 pin 16 to set the frequency of the oscillator. The output of the oscillator (pin 2 of Y8702) is applied to pin 14 (XTAL1) of U8701 via a RC series combination.

10.2

Fractional-N Synthesizer (U8701)

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The FRAC-N synthesizer IC (U8701) consists of a pre-scaler, a programmable loop divider, control divider logic, a phase detector, a charge pump, an A/D converter for low frequency digital modulation, a balance attenuator to balance the high frequency analog modulation and low frequency digital modulation, a 13V positive voltage multiplier, a serial interface for control, and finally a super filter for the regulated 9.3 volts.

A voltage of 9.3V applied to the super filter input (U8701 pin 22) supplies an output voltage of 8.6

VDC at pin 18. It supplies the VCO (Q8802), VCO modulation bias circuit (via R8714) and the synthesizer charge pump resistor network (R8723, R8724, R8726). The synthesizer supply voltage is provided by the 5V regulator U8891.



In order to generate a high voltage to supply the phase detector (charge pump) output stage at pin

VCP (U8701-32), a voltage of 13 VDC is being generated by the positive voltage multiplier circuitry

(D8701-1-3, C8716, C8717). This voltage multiplier is basically a diode capacitor network driven by two (1.05MHz) 180 degrees out of phase signals (U8701-9 and -10).

Output LOCK (U8701-2) provides information about the lock status of the synthesizer loop. A high level at this output indicates a stable loop. IC U8701 divides the 16.8 MHz reference frequency down to 2.1 MHz and provides it at pin 11. This signal is used as clock signal by the controller.

The serial interface (SRL) is connected to the microprocessor via the data line SPI DATA (U8701-5), clock line SPI CLK (U8701-6), and chip enable line FRACN CE (U8701-7).

10.3

Voltage Controlled Oscillator (VCO)

The Voltage Controlled Oscillator (VCO) is formed by the colpitts oscillator FET Q8802. Q8802 draws a drain current of 10 mA from the FRAC-N IC super filter output. The oscillator frequency is half of the desired frequency and mainly determined by L8804, C8809, C8810, C8812 - C8815 and varactor diodes D8802 / D8803. Diode D8804 controls the amplitude of the oscillator.

A balanced frequency doubler T8821, D8821 converts the oscillator fundamental to the desired frequency. With a steering voltage from 2.5V to 10.5V at the varactor diodes the full RX and TX frequency range from 254.9 MHz to 350 MHz is covered.

The doubler output is buffered by Common VCO Buffer Q8831 which draws a collector current of 15 mA from the stabilized 5V (U8891). A bandpass filter composed of L8831, C8832 - C8836, 15 nH micro-stripline rejects unwanted harmonics at the first and third oscillator fundamental frequency and matches the output to the following buffer stages. Buffer Q8831 drives the Pre-scaler Buffer

Q8841, the PA Buffers Q8851, Q8852 (Pout = 13dBm) and Mixer Buffer Q8881 (Pout = 10dBm).

Q8841 draws a collector current of 14 mA from the stabilized 5V, Q8851 draws 15mA, Q8852 draws

20 mA and Q8881 draws 18 mA form the FLT 9V3 source. The buffer stages Q8851, Q8881 and the feedback amplifier Q8841 provide the necessary gain and isolation for the synthesizer loop.

Q8801 is controlled by output AUX3 of U8701 (pin 1) and enables the RX or TX buffer. In RX mode

AUX3 is nearly at ground level, in TX mode about 5V DC. In TX mode, with R8802 pulled to ground level by Q8801, the modulation signal coming from the FRAC-N synthesizer IC (U8701 pin28) modulates the VCO via varactor diode D8801 while in RX mode the modulation circuit is disabled by pulling R8802 to a higher level through R8882.

10.4

www.myradio168.net

The complete synthesizer subsystem works as follows. The output signal of the VCO (Q8802) is frequency doubled by doubler D8821 and, buffered by Common VCO Buffer Q8831. To close the synthesizer loop, the collector of Q8841 is connected to the PREIN port of synthesizer U8701 (pin

20). The buffer output (Q8831) also provides signals for the Mixer Buffer Q8881 and the PA Buffers

(Q8851, Q8852).

The pre-scaler in the synthesizer (U8701) is basically a dual modulus pre-scaler with selectable divider ratios. This divider ratio of the pre-scaler is controlled by the loop divider, which in turn receives its inputs via the SRL. The output of the pre-scaler is applied to the loop divider. The output of the loop divider is connected to the phase detector, which compares the loop divider´s output signal with the reference signal.The reference signal is generated by dividing down the signal of the reference oscillator (Y8702).



The output signal of the phase detector is a pulsed DC signal which is routed to the charge pump.

The charge pump outputs a current at pin 29 (I OUT of U8701). The loop filter (which consists of

R8715-R8717, C8723-C8725, C8727) transforms this current into a voltage that is applied to the varactor diodes D8802, D8803 and alters the output frequency of the VCO. The current can be set to a value fixed in the FRAC-N IC or to a value determined by the currents flowing into CPBIAS 1

(U8701-27) or CPBIAS 2 (U8701-26). The currents are set by the value of R8724 or R8726 respectively. The selection of the three different bias sources is done by software programming.

To reduce synthesizer lock time when new frequency data has been loaded into the synthesizer the magnitude of the loop current is increased by enabling the IADAPT line (U8701-31) for a certain software programmable time (Adapt Mode). The adapt mode timer is started by a low to high transient of the FRACN CE line. When the synthesizer is within the lock range the current is determined only by the resistors connected to CPBIAS 1, CPBIAS 2, or the internal current source.

A settled synthesizer loop is indicated by a high level of signal LOCK DET (U8701-2). Open architecture only: LOCK DET adds up with signal SQ DET, weighted by resistors R0113, R0114, and is routed to one of the uP´s ADCs input U0101-43. From the voltage weighted by the resistors the uP determines whether SQ DET, LOCK DET or both are active.

In order to modulate the PLL the two spot modulation method is utilized. Via pin 8 (MODIN) on

U8701 the audio signal is applied to both the A/D converter (low freq path) as well as the balance attenuator (high freq path). The A/D converter converts the low frequency analog modulating signal into a digital code that is applied to the loop divider, thereby causing the carrier to deviate. The balance attenuator is used to adjust the VCO’s deviation sensitivity to high frequency modulating signals. The output of the balance attenuator is present at the MODOUT port (U8701-28) and connected to the VCO modulation diode D8801.

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4-24

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Chapter 5

PCB/Schematic Diagrams and Parts Lists

Table of Contents

Description Page

336-390MHz Diagrams and Parts Lists

336-390MHz Main Board Component Side ...................................................................1

PCB No. 8486049B01 ...................................................................................................1

336-390MHz Main Board Solder Side ...........................................................................2

PCB No. 8486049B01 ...................................................................................................2

336-390MHz Open Controller Schematic Diagram .......................................................3

Controller Parts List .......................................................................................................4

336-390MHz Open Controller_IO Schematic Diagram..................................................5

336-390MHz Supply Voltage Schematic Diagram.........................................................7

Supply Voltage Parts List...............................................................................................8

336-390MHz Power Control Schematic Diagram ..........................................................9

Power Control Parts List ..............................................................................................10

336-390MHz Power Amplifier 5-25W Schematic Diagram ..........................................11

Power Amplifier 5-25W Parts List ................................................................................12

336-390MHz Synthesizer Schematic Diagram ............................................................13

Synthesizer Parts List ..................................................................................................14

www.myradio168.net

Voltage Controlled OscillatorParts List ........................................................................16

336-390MHz RX-FE Schematic Diagram ....................................................................17

RX-FE Parts List ..........................................................................................................18

336-390MHz RX-IF Schematic Diagram .....................................................................19

RX-IF Parts List ...........................................................................................................20

PCB/Schematic Diagrams and Parts Lists 5-i


5-ii

www.myradio168.net

PCB/Schematic Diagrams and Parts Lists

336-390MHz Main Board Component Side

Diagrams and Parts Lists

9

8

Q0141 Q0123 Q0121 www.myradio168.net

J0101

R0133

C0133

C0131

22

VR0102

C0107

28

1

16

U0105

R0135

1

R0122

R0116

R0121

R0112

8

14

C0151

R0124

C0114

C0121

R0128

7

U0106

R0108

1

R0126 R0130

R0129

R0144

R0120

R0104

C0112

7

C0111

8

U0202

1

6

R0204 R0205

R0206

C0222

R0201

R0202

1

B8

C0231

C8

D8

C0205

E8

R0221

F8

R0223

G8

A7

14

C0221

H8

J7

7

41

40 21

20

U0101

C0253

12

C0223

C0243

C0228

U0201

C0212

R0207

A2

J2

B1

C1

D1

E1

F1

G1

H1

18

R0146

C0146

C0202

L0132

R0401

R0402

21

U0103

8

60

61

C0106

8

U0107

U0104

1

R0131

9

R0134

R0137

R0139

16

16

4

1

R0145

5

80

1

R0105

U0251

8

R0138

9 8

VR0641 C0622

5 4

C0235

R0235

Q0741

D0733

D0631

U0631

8 1

C0633

C0631

R0601

R0605 R0604

5 4 3 2 1

R0735

U0731

R0731

1

R0742

3 2 1

Q0742

C0701

C0721

D0732

U0601

C0402

C0405

C0406

R0404

R0405

Q0401

C0403

R0406

R0407

C8503

L8503

C8524

C8528

C8617

C8616

1 5

9

C8623

8

Q8510

1

C8511

4

5

R8514

L8611

C8724

E8802

C8727

C8726 R8724

R8723 R8726

C8728

C8702 R8702

R8701 C8713

C8703

C5229

R8708

L8804

D8804

C8810

C8809

D8802

R8805

C8813

Q8802

C8817

4

5

L8802

R8802

R8801

D8801

L8801

C8802

R8803

C8820

R8825

Q8801

D8821

3

R8833

R8832

T8821

2

1

C8833

L8852

R8862

R8865 C8867

C8868

R8864

Q8852

R8835

C8835

C8832

C8834

C5238

R8703

E8702

8

C8892

5

R5222

4

Y8702

1

U8891

4

C5226

R5221

FL5202

5

L5206

C5235

R5217

C8893

R5206

1

C8706

FL5201

R8891

C5214

R5212

FL5203

C5213

C5212

1

5 4

C8407

T8402

L8404

1 2

C8405

C8402

8 5

3

Y5201

1

2 3

L5201

L8403

D8401

L8401

1 4

R8403 R8402

3 2 1

R8401

L8402

T8401

C8404

C8306

4

5

R8310

R8309

C8314

C8313

Y5202

1 2 3

R8307

R8302 C8310

C8311

2

1

R8301

Y5211

R8303

R8313 R8304

C8303 C8302

D8303

E8301

C8642

C8532

C8548

R8541

L8542

C8544

L8551

C8633

C8634

D8631

L8631

C8632

U0401

R8512

R8511

Q8520

C8541

L8552

L8553

C8536

R8550

L8600

C8554

C8600

C8535

C8529

R0449

R0450

VR0410

C0451

VR0431

Q0450

R0423

R0424

VR0425

VR0402

VR0421

R0451

R0417

C0425

C0431 R0452

C0421

C0426 R0420 C0408

15 13

11

9

7

5

3 1 J0400

16 14 12

10

8

6

4 2

J8601

SH8501

C8537

C8542

C8543

3

1

J8501

2

Component Side 8486049B01 GEPD5529

336-390MHz Main Board Component Side

PCB No. 8486049B01

5-1

336-390MHz Main Board Solder Side

336-390MHz Main Board Solder Side

PCB No. 8486049B01

5-2

30

C5215

36

1

U5201

C5239

C5236

17

C5225

5

R5225

R5216

C5237

C5233

23

C5223

12

C5221

C5228

C5207

C5208

R5204

L5203

R5205

R5207

L5202

Q5201

R5201

C5201

C5200

C8631

Q8302

R8318

C8322

R8312

R8315

D8311

R8319 www.myradio168.net

C8558

D8553

R8552

R8551

C8556

VR8701

1

C8718

32

E8701

25

24

C8720

8

C8717

9

C8715

D8701

C8716

R8700

U8701

16

17

C8719

C8714

C8729

R8717

R8715

C0224

C0209

C0210

C0136

C0227

D0200

C0200 R0200

L0200

R0220

Q0105

VR0161

Q0104

Q0106

16

1

E8801

R8886

C8882

R8884

C8884

C8883

R8718

R8712

Q8881

C8881

R8887

C8844

R8882

R8841

R8855

R8714

C8842

Q8841

R8842

R8889

C8331

C8831

R8863

C8870

R8851

L8851

R8852

R8857

C8857

R8859

R8534

R8535

R8533

R8532

C8531

L8539

Q0601

C0621

Q0612

C0634

R0617

R0613

C0632

R0612

R0621

R0611

1

C0601

2

C0602 R0606

3

R0603 R0602

C0605

C0611

D0611

R0734

3

2

5

Q0732

1

R0703

R0725

R0722

C0703

R0724

C0702

7

1

D0721

R0711

C0603

C0604

R0701 R0705

C0705

8

U0701

R0717

R0712

14

Q0711

C0714

R0713

R0718

R0719

R8528

R8529

C8618

R8611

R8521

R8616 C8615

R8613

C8619

R8615

R8617

C8621

R8622

Q8611

R0107

17

U0102

32

R0150

VR0423

C0414

C0413

R0414

R0416

C0417

R0435

C0433

Q0431

Q0432

C0411

R0411

R0422

R0431

C0432

3 2 1

Q0411

R0412 R0442

C0441

R0440

C8538

R8523

C8523

C8602

C8603

Q8531

C8604

C8601

Q8540

L8534

L8533

Q8530

C8527

R8527

R8525

C8525

R8522

C8522

D8601

L8601

R0421 R0428

VR0420

C0419

VR0412 VR0422

R0418 R0427

R0425

R0419

R0426

VR0401

C0415 C0412 C0422 C0442

C0427

C0423 C0416

1 15

2

16

Solder Side 8486049B01 GEPD5530


336-390MHz Open Controller Schematic Diagram

www.myradio168.net



1 of 2

5-3


Controller Parts List

Circuit

Ref

C0201

C0202

C0203

C0204

C0205

C0206

C0207

C0208

C0131

C0132

C0133

C0135

C0136

C0146

C0151

C0200

C0108

C0109

C0110

C0111

C0112

C0113

C0114

C0121

C0100

C0101

C0102

C0103

C0104

C0105

C0106

C0107

Motorola

Part No.

2113743K15

2311049A07

2113743K15

2113743K15

2113741F17

2113740F36

2113743K15

2113743K15

2113741F17

2113741F17

2113741F17

2113741F17

2113743F08

2113743K15

2113743F08

2113741F13

2113741F17

2113743K15

2113743K15

2113743K15

2113741F49

2311049A42

2113743K15

2113741F49

2113741F25

2113741F17

2113741F17

2113741F49

2113741F49

2113741F49

2113741F49

2113741F49

Description

470pF 50V

100nF 16V

100nF 16V

100nF 16V

10nF 50V

TANT CP 3.3uF 10% 6V

100nF 16V

10nF 50V

1nF 50V

470pF 50V

470pF 50V

10nF 50V

10nF 50V

10nF 50V

10nF 50V

10nF 50V

100nF 16V

TANT CP 1uF 10% 16V

100nF 16V

100nF 16V

470pF 50V

24pF 5% 50V

100nF 16V

100nF 16V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

220nF 5% 50V

100nF 16V

220nF 5% 50V

330pF 50V

5-4

Circuit

Ref

C0254

C0401

C0402

C0404

C0405

C0406

C0407

C0408

C0409

C0234

C0235

C0241

C0242

C0243

C0251

C0252

C0253

C0225

C0226

C0227

C0228

C0229

C0230

C0231

C0233

C0209

C0210

C0211

C0212

C0221

C0222

C0223

C0224

Motorola

Part No.

2113743K15

2113743A19

2113741F17

2113741F17

2113741F17

2113743K15

2311049J23

2311049A07

2113743K15

2113743A19

2113741F37

2311049A99

2113741F25

2113741F25

2113741F49

2113741F49

2109720D14

2311049J26

2113741M53

2113743A19

2113743K15

2113743K15

2311049A07

2113741A57

2311049J11

2113741F49

2113743K15

2311049A99

2311049A01

2113741F49

2311049J23

2113741F49

2113740F39

Description

TANT CP 10uF 20% 16V

22nF 50V

100nF 16V

100nF 16V Y5V

100nF 16V Y5V

TANT CP 1uF 10% 16V

33nF 50V


10nF 50V

100nF 16V


TANT CP 100nF 10% 35V

10nF 50V

TANT CP 10uF 10% 6V

10nF 50V

33pF 5% 50V

100nF 16V

100nF 16V

470pF 50V

470pF 50V

470pF 50V

100nF 16V Y5V

TANT CP 10uF 10% 6V

TANT CP 1uF 10% 16V

100nF 16V Y5V

100nF 16V

3.3nF 50V


1nF 50V

1nF 50V

10nF 50V

10nF 50V

CER LOW DIST 100nF www.myradio168.net

Circuit

Ref

J0400

L0131

L0132

L0200

L0401

L0402

Q0101

Q0102

Q0103

C0451

D0101

D0102

D0200

D0441

J0101

J0102

J0103

C0423

C0425

C0426

C0427

C0431

C0433

C0441

C0442

C0410

C0412

C0415

C0416

C0418

C0419

C0421

C0422

Motorola

Part No.

2113741F17

4813833C02

4813833C02

4813833C02

4813833C02

0902636Y01

0904424J06

0904424J06

2804503J01

2462587Q40

2462587Q40

2462587K26

2484657R01

2484657R01

4880048M01

4880048M01

4880048M01

2113741F17

2113741F17

2113741F17

2113741F17

2311049A05

2311049A99

2113741F17

2113741F17

2113741F17

2113741F17

2113741F17

2113741F17

2113741F17

2113741F49

2113741F17

2113741F17

Description

470pF 50V

470pF 50V

470pF 50V

470pF 50V



470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

10nF 50V

470pF 50V

470pF 50V

470pF 50V

DUAL SOT MMBD6100

DUAL SOT MMBD6100

DUAL SOT MMBD6100

DUAL SOT MMBD6100

Connector Flex Side Entry

Connector Double Row

Connector Double Row

CONNECTOR ACCY 16 PIN

COIL CHIP 270nH

COIL CHIP 270nH

CHIP IND 33000 NH

Ferrite Bead

Ferrite Bead

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

Circuit

Ref

R0109

R0110

R0111

R0112

R0113

R0114

R0115

R0116

R0118

R0101

R0102

R0103

R0104

R0105

R0106

R0107

R0108

Q0141

Q0200

Q0401

Q0411

Q0432

Q0441

Q0450

R0100

Q0104

Q0105

Q0106

Q0121

Q0122

Q0123

Q0124

Q0125

Motorola

Part No.

0662057B05

0662057B05

0662057B05

0662057A89

0662057A65

0662057A73

0662057A57

0662057A73

0662057A35

0662057A35

0662057A65

0662057A65

0662057A85

0662057A93

0662057A89

0662057A73

0662057A89

4880048M01

4813824A10

4880048M01

4880048M01

4880048M01

4880048M01

4880048M01

4880048M01

4880048M01

4813824A10

4813824A10

4880052M01

4813824A10

4880048M01

4880048M01

0662057A65

Description

200k 1/16W

200k 1/16W

200k 1/16W

47k 1/16W 5%

4k7 1/16W 5%

10k 1/16W 5%

2k2 1/16W 5%

10k 1/16W 5%

270 1/16W 5%

270 1/16W 5%

4k7 1/16W 5%

4k7 1/16W 5%

33k 1/16W 5%

68k 1/16W 5%

47k 1/16W 5%

10k 1/16W 5%

47k 1/16W 5%

NPN DIG 47k/47k

NPN 40V .2A B=50-150

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN 40V .2A B=50-150

NPN 40V .2A B=50-150

NPN DRLNGTN MXTA

NPN 40V .2A B=50-150

NPN DIG 47k/47k

NPN DIG 47k/47k

4k7 1/16W 5%


336-390MHz Open Controller_IO Schematic Diagram

www.myradio168.net



2 of 2

5-5


Circuit

Ref

R0200

R0201

R0202

R0203

R0204

R0205

R0206

R0208

R0209

R0139

R0141

R0142

R0144

R0145

R0146

R0147

R0161

R0127

R0128

R0129

R0130

R0131

R0132

R0133

R0135

R0119

R0120

R0121

R0122

R0123

R0124

R0125

R0126

Motorola

Part No.

0662057B47

0662057B47

0662057A73

0662057A65

0662057A73

0662057A35

0662057A35

0662057A49

0662057A73

0662057A89

0662057A89

0662057A73

0662057A25

0662057A49

0662057A41

0662057A73

0662057A73

0662057A73

0662057A89

0662057A65

0662057A89

0662057A89

0662057A65

0662057A73

0662057A73

0662057A65

0662057A73

0662057A73

0662057A73

0662057A65

0662057A81

0662057A97

0662057A73

Description

0 1/16W

0 1/16W

10k 1/16W 5%

4k7 1/16W 5%

10k 1/16W 5%

270 1/16W 5%

270 1/16W 5%

1k 1/16W 5%

10k 1/16W 5%

47k 1/16W 5%

47k 1/16W 5%

10k 1/16W 5%

100 1/16W 5%

1k 1/16W 5%

470 1/16W 5%

10k 1/16W 5%

10k 1/16W 5%

10k 1/16W 5%

47k 1/16W 5%

4k7 1/16W 5%

47k 1/16W 5%

47k 1/16W 5%

4k7 1/16W 5%

10k 1/16W 5%

10k 1/16W 5%

4k7 1/16W 5%

10k 1/16W 5%

10k 1/16W 5%

10k 1/16W 5%

4k7 1/16W 5%

22k 1/16W 5%

100k 1/16W

10k 1/16W 5%

5-6

Circuit

Ref

R0419

R0420

R0421

R0422

R0423

R0424

R0425

R0431

R0432

R0405

R0406

R0407

R0411

R0412

R0413

R0417

R0418

R0233

R0235

R0236

R0251

R0252

R0401

R0402

R0404

R0210

R0221

R0222

R0223

R0224

R0225

R0231

R0232

Motorola

Part No.

0662057A73

0662057A81

0662057A77

0662057A73

0662057A65

0662057B47

0662057A97

0662057A18

0662057A97

0662057A35

0662057A43

0662057A35

0662057A65

0662057A35

0662057A09

0662057A73

0662057A65

0662057A49

0662057B47

0662057A89

0662057R92

0662057A73

0662057A73

0662057B47

0662057A93

0662057A73

0662057A85

0662057A93

0662057R92

0662057R92

0662057A65

0662057A49

0662057A73

Description

10k 1/16W 5%

22k 1/16W 5%

15k 1/16W 5%

10k 1/16W 5%

4k7 1/16W 5%

0 1/16W

100k 1/16W

51 1/16W 5%

100k 1/16W

270 1/16W 5%

560 1/16W 5%

270 1/16W 5%

4k7 1/16W 5%

270 1/16W 5%

22 1/16W 5%

10k 1/16W 5%

4k7 1/16W 5%

1k 1/16W 5%

0 1/16W

47k 1/16W 5%

47.5k .1W 1%

10k 1/16W 5%

10k 1/16W 5%

0 1/16W

68k 1/16W 5%

10k 1/16W 5%

33k 1/16W 5%

68k 1/16W 5%

47.5k .1W 1%

47.5k .1W 1%

4k7 1/16W 5%

1k 1/16W 5%

10k 1/16W 5% www.myradio168.net

Circuit

Ref

R0433

R0435

R0440

R0441

R0442

R0449

R0450

R0451

U0101

U0102

U0103

U0104

U0105

Motorola

Part No.

0662057A65

0662057A73

0662057A93

0662057A65

0662057A73

0662057A85

0662057A65

0662057A65

5113802A48

5105625U73

5185748L01

5105462G76

5113805A30

U0106

U0201

U0202

U0251

5105492X36

5105835U45

5183222M49

5113818A03

U0401 5109699X01

VR0101 4813830A23

VR0102 4813830A14

VR0161 4813830A15

VR0410 4813830A27

VR0412 4813830A40

VR0415 4813830A27

VR0416 4813830A27

VR0420 4813830A15

VR0423 4813830A15

VR0425 4813830A15

VR0426 4813830A27

VR0427 4813830A27

VR0431 4813830A27

Description

4k7 1/16W 5%

10k 1/16W 5%

68k 1/16W 5%

4k7 1/16W 5%

10k 1/16W 5%

33k 1/16W 5%

4k7 1/16W 5%

4k7 1/16W 5%

PROC350 PLAT S/W

R010000 A3

IC 256K x 8 FLS ROM NIN

TSOP

32KX8 SRAM 28 PIN TSOP

L IC EEPROM 4K SPICMOS

IC 10F8 DCDR/REMUX

74HC138

74AC08 4 AND GATES

ASFIC

IC QUAD OPAMP __3403_

IC HIGh Performance SI

AUDIO PA TDA1915C

10V 5% 20mA 350mW

5.1V 5% 225mW

5.6V 5% 225mW

DIODE 14V 5% 225mW

SOC23 AUTO SDN

DIODE 14V 5% 225mW

DIODE 14V 5% 225mW

DIODE 5.6V 5% 225mW

DIODE 5.6V 5% 225mW

DIODE 5.6V 5% 225mW

DIODE 14V 5% 225mW

DIODE 14V 5% 225mW

DIODE 14V 5% 225mW

Circuit

Ref

Motorola

Part No.

VR0441 4813830A40

VR0451 4813830A15

Description

SOC23 AUTO SDN

DIODE 5.6V 5% 225mW



336-390MHz Supply Voltage Schematic Diagram

+5V +5V

FLT_A+_8

FLT_A+

EMERGENCY_CONTROL

ON_OFF_CONTROL

B+_CONTROL

IGNITION_CONTROL www.myradio168.net

C0601 C0602 C0603

R0601

10K

U0601

4

VIN

LM2941T

VOUT

5

2

ON_OFF* ADJ

1

GND

3

R0602

7.5K

R0603

1.2K

C0604

33uF

C0605

.1uF

Q0601

R0606

0

R0604

3.3K

R0605

22K

R0631

10

1

D0631

2

R0632

10

3

C0631

.1uF

R0621

2.2K

VR0621

5.1V

+5V

2

1

D0621

3

C0621

C0622

C0632

33uF

U0631

LP2951CM

8

7

3

INPUT

FEEDBACK

SHUTDOWN

OUTPUT

ERROR

SENSE

5V_TAP

1

5

2

6

GND

4

9V3_1_8

9V3_8

9V3

9V3

+5V

C0633

C0634

C0635

USW_+5V

USW_+5V_CL

RESET

SW_B+_8

SW_B+

SW_B+

R0611

820

Q0611

R0612

3.3K

R0613

3.3K

R0617

3.3K

C0613

470pF

R0641

30K

R0642

10K

C0641

0.1uF

VR0641

5.1V

1

2

D0611

3

R0614

1K

C0611

47uF

R0615

10K

R0616

10K

C0612

0.1uF

Q0612

0102725B31 GEPD5402-2 SUPPLY VLTG


5-7


Supply Voltage Parts List

Circuit

Ref

C0621

C0622

C0631

C0632

C0633

C0634

C0635

C0641

D0611

C0601

C0602

C0603

C0604

C0605

C0611

C0612

C0613

Motorola

Part No.

2113741F17

2109720D14

2380090M24

2311049A97

2109720D14

2311049A99

2113743K15

2113741F17

2113741F17

2311049A99

2109720D14

2311049A97

2113743E07

2311049A99

2109720D14

2113743K15

4813833C02

Description

D0621

D0631

4813833C02

4813833C02

Q0601

Q0611

Q0612

R0601

R0602

R0603

R0604

R0605

R0606

R0611

R0612

4813824A10

4805128M27

4813824A10

0662057A73

0660076E70

0660076E51

0662057A61

0662057A81

0662057B47

0662057A47

0662057C87

470pF 50V

CER LOW DIST 100nF

CHIP LYT 10uF 50V 20%


CER LOW DIST 100nF


100nF 16V Y5V 0603

470pF 50V X7R 0603

470pF 50V X7R 0603


CER LOW DIST 100nF


22nF 16V X7R


CER LOW DIST 100nF

CHIP 100nF 16V

DIODE DUAL SOT

MMBD6100

DIODE DUAL SOT

MMBD6100

DIODE DUAL SOT

MMBD6100

NPN 40V .2A B=50-150

PNP SOT89 BSR33 LH

NPN 40V .2A B=50-150

RES CHP 10k 1/16W 5%

RES CHIP FILM 7500 1 1

RES CHIP FILM 1200 1 1

RES CHP 3k3 1/16W 5%


RES CHIP 0 1/16W

RES CHP 820 1/16W 5%

RES CHIP 3300 5 1/8

5-8

Circuit

Ref

Motorola

Part No.

R0613

R0614

R0615

R0616

R0617

R0621

R0631

R0632

0662057C87

0662057A49

0662057A73

0662057A73

0662057C87

0662057A57

0662057A01

0662057A01

R0641

R0642

U0601

U0631

0662057A84

0662057A73

5105625U25

5105469E65

VR0621 4813830A14

VR0641 4813830A14

Description

RES CHIP 3300 5 1/8

RES CHP 1k 1/16W 5%



RES CHIP 3300 5 1/8

RES CHP 2k2 1/16W 5%

RES CHP 10 1/16W 5%

RES CHP 10 1/16W 5%



IC 9.3V REG 2941

IC VLTG REGLTR LP2951C

DIODE 5.1V 5% 225mW

DIODE 5.1V 5% 225mW www.myradio168.net


336-390MHz Power Control Schematic Diagram

0102725B74

0102725B96

MB PWR CNTL

336-390MHz PWR CNTL

VAG_7

(CNTL) VAG

(PA) PWR_DETECT

PWR_DETECT_7

C0705

R0705

12K

.0047uF

R0701

68K

C0701

100pF

C0702

100pF

R0702

47K

U0701-2

6

5

MC3403

7

(SV) 9V3

(PA) PA_TEMP

9V3_7

PA_TEMP_7

(CNTL)

(CNTL)

(CNTL)

SPI_CLCK_SRC

DAC_CE

SPI_DATA_SRC

SPI_CLCK_SRC_7

DAC_CE_7

SPI_DATA_SRC_7

(CNTL) PA_ENABLE

(SV) SW_B+

PA_ENABLE_7

SW_B+_7

4

VCC

U0701-5

PWR_GND

GND

11

X www.myradio168.net

9V3

R0721

10K

C0721

100pF

R0722

22K

C0703

0.1uF

R0703

10K

VAG

R0725

10K

MAX

NULL

C0722

100pF

3

U0701-1

MC3403

1

2

R0723

47K

R0704

47K

C0711

R0712

9

39000pF

U0701-4

MC3403

8

10

0

R0711

22K

C0713

100pF

C0712

43pF

Q0711

R0713

3.3K

R0714

12K

14

U0701-3

MC3403

12

13

C0714

.100uF

D0721

3

C0723

100pF

R0724

100K

2 1

R0731

22K

9V3

C0731

R0734

0.1uF

10

6

16

VDD

CLK

EN

Q1

Q2

Q3

Q4

4.7K

U0731

MC144111

2

4

11

13

PA_PWR_SET

D0731

1

8

9

D_IN R1

R2

R3

R4 NC

NC1

D_OUT 15

GND

3

5

12

14

7

1

2

3

47K

47K

Q0731

3

R0736

15K

4

5

Q0732

FMC2A

2

1

R0737

NU

1K

XX

D0733

XX

XX

9V3

R0716

560K

R0717

33K

C0716

.0022uF

R0718

68K

R0715

22K

R0720

NU

9V3

R0738

47K

C0738

.220uF

R0719

68K

R0732

4.7K

C0733

.220uF

R0735

10K

D0732

R0733

47K

3

2 1

C0732

100pF

9V3

Q0742

R0741

1K

R0742

1K

C0742

0.1uF

C0741

100pF

K9V1_ENABLE_7

Q0741

47K

47K

(CNTL) K9V1_ENABLE

PWR_CNTL_7

PWR_CNTL (PA)

VLTG_LIMIT_7

VLTG_LIMIT (CNTL)

BIAS_VLTG_2_7

BIAS_VLTG_2

BIAS_VLTG_7

BIAS_VLTG (PA)

FE_CNTL_VLTG_7

FE_CNTL_VLTG (FE)

K9V1_7

K9V1 (PA)

GEPD 5481 o

0102725B96


Diagrams and Parts Lists 5-9


Power Control Parts List

Circuit

Ref

C0716

C0721

C0722

C0723

C0731

C0732

C0733

C0738

C0701

C0702

C0703

C0705

C0711

C0712

C0713

C0714

C0741

C0742

D0721

Motorola

Part No.

2113740F51

2113740F51

2113743K15

2113741F41

2113741A59

2113740F42

2113740F51

2113743A19

2113741F33

2113740F51

2113740F51

2113740F51

2113743K15

2113740F51

2113743A23

2113743A23

2113740F51

2113743K15

4813833C02

Description

D0731-

D0733

Q0711

Q0731

Q0732

Q0741

Q0742

R0701

R0702

R0703

R0704

R0705

4813833C02

4813824A10

4880048M01

4805921T02

4880048M01

4805128M27

0662057A93

0662057A89

0662057A73

0662057A93

0662057A75

100pF 5% 50V

100pF 5% 50V

100nF 16V

47nF 50V

CL2

43pF 5% 50V

100pF 5% 50V

100nF 16V

2.2nF 50V

100pF 5% 50V

100pF 5% 50V

100pF 5% 50V

100nF 16V Y5V

100pF 5% 50V

220nF 16V

220nF 16V

100pF 5% 50V

100nF 16V

DIODE DUAL SOT

MMBD6100

DIODE DUAL SOT

MMBD6100

TSTR NPN 40V .2A

TSTR NPN DIG 47k/47k

TSTR DUAL ROHM FMC

TSTR NPN DIG 47k/47k

TSTR PNP SOT89 BSR33

68k 1/16W 5%

47k 1/16W 5%

10k 1/16W 5%

68k 1/16W 5%

12k 1/16W 5%

Circuit

Ref

R0719

R0721

R0722

R0723

R0724

R0725

R0731

R0732

R0711

R0712

R0713

R0714

R0715

R0716

R0717

R0718

R0733

R0734

R0735

R0736

R0738

R0741

R0742

U0701

U0731

Motorola

Part No.

0662057A81

0662057B47

0662057A61

0662057A75

0662057A81

0662057B16

0662057A85

0662057A93

0662057A93

0662057A73

0662057A81

0662057A89

0662057A97

0662057A73

0662057A81

0662057A65

0662057A89

0662057A65

0662057A73

0662057A77

0662057A89

0662057A49

0662057A49

5183222M49

5113811G02

Description

22k 1/16W 5%

0

3k3 1/16W 5%

12k 1/16W 5%

22k 1/16W 5%

560k 1/16W 5%

33k 1/16W 5%

68k 1/16W 5%

68k 1/16W 5%

10k 1/16W 5%

22k 1/16W 5%

47k 1/16W 5%

100k 1/16W

10k 1/16W 5%

22k 1/16W 5%

4k7 1/16W 5%

47k 1/16W 5%

4k7 1/16W 5%

10k 1/16W 5%

15k 1/16W 5%

47k 1/16W 5%

1k 1/16W 5%

1k 1/16W 5%

IC QUAD OPAMP __3403_

IC D/A CONV & BIT 4 CHAN

W/SPI

5-10

www.myradio168.net


336-390MHz Power Amplifier 5-25W Schematic Diagram

A+

L8600

J8601

1

2

NU

D8601

C8600

330pF

C8601

10uF

NU

C8604

10uF

BIAS_VLTG_2

BIAS_VLTG_2_1

BIAS_VLTG_1

BIAS_VLTG

TP8201

K9V1_1

K9V1

R8623

4.7

R8624

4.7

C8621

.001uF

Q8611

TP8202

PWR_CNTL_1

R8611

PWR_CNTL

10K

R8612

2K

EXCITER_PA

EXCITER_PA_1

R8622

10K

NU

R8621

680

C8611

470pF

C8503

30pF

L8503

22nH

Q8612 C8614

.001uF

NU

C8612

.01uF

R8613

1K

C8619

100pF

R8501

4.7

Q8621

C8613

.01uF

NU

R8502

68

L8501

13.85nH

C8501

10pF

C8502

.01uF

1

4

6

7

Q8510

MRF8372

2

3

5

8

PA_TEMP

PA_TEMP_1

TP8203

C8642

.001uF

R8641

100K

A+

L8601

C8602

100pF

C8603

.001uF

FLT_A+_1

FLT_A+ www.myradio168.net

C8622

.01uF

C8623

100pF

R8513

2.2K

C8512

16pF

1.5mmx2mm

C8511

4.7pF

NU

R8511

10

R8512

10

C8513

24pF

R8515

51

R8514

150

C8514

3300pF

Q8520

MRF557

1

3

2

4

R8614

51

R8528

47K

R8529

47K

C8521

20pF

C8528

.001uF

C8524

.001uF

C8522

R8522

1K

R8521

0

NU

R8523

1K

C8523

.01uF

R8525

4.7

C8525

30pF

R8527

4.7

C8527

30pF

C8531

.01uF

C8532

330pF

L8532

C8530

R8541

10

C8548

.01uF

L8542

.1uF

Q8530

XX

XX

Q8531

XX

XX

XX

XX

L8531

L8539

38nH

C8539

6.2pF

1mmx3mm

C8534

20pF

C8533

24pF

C8529

30pF

C8535

20pF

L8533

13.85nH

R8532

120

R8533

51

NU

C8538

39000pF

C8536

36pF

C8537

36pF

R8534

51

NU

R8535

120

C8541

39pF

Q8540

MRF650

NU

C8547

180pF

C8546

3300pF

L8541

18nH

1.5mmx2mm

1.5mmx25mm

C8542

43pF

C8543

36pF

C8544

12pF

R8552

51

DIRECTIONAL COUPLER

D8553

C8558

5.1pF

R8553

120

L8534

R8531

10

C8556

.001uF

R8551

10K

C8620

L8611

C8616

330pF

NU

C8617

330pF

C8618

1uF

L8554

120nH

NU

D8551

L8551

25nH

C8559

.001uF

NU

C8551

180pF

L8552

25nH

C8552

10pF

HARMONIC FILTER

L8553

25nH

C8553

12pF

C8554

6.2pF

R8550

10K

TP8204

PWR_DETECT_1

PWR_DETECT

2

J8501

3

NU

R8616

10

R8617

10

60x300 mils

A+

R8615

4.7K

C8631

.001uF

L8631

470nH

C8632

120pF

D8631

C8633

2.2pF

C8634

56pF

PA_RX_1

PA_RX

0102725B84 GEPD5525 Power Amplifier

C8615

.001uF

SH8501

Heatspreader


5-11 Diagrams and Parts Lists


Power Amplifier 5-25W Parts List

Circuit

Ref

C8541

C8542

C8543

C8544

C8546

C8547

C8548

C8551

C8532

C8533

C8534

C8535

C8536

C8537

C8538

C8539

C8523

C8524

C8525

C8527

C8528

C8529

C8530

C8531

C8501

C8502

C8503

C8512

C8513

C8514

C8521

C8522

Motorola

Part No.

2113740A67

2111078B23

2111078B31

2113740A36

2111078B31

2111078B31

2113741A59

2111078B08

2111078B32

2111078B33

2111078B31

2111078B15

2113741A33

2111078B49

2113741F49

2111078B49

2113740F27

2113741F49

2113740F38

2113740F32

2113740F36

2113741A33

2113740A36

2113741F49

2113741F49

2113741F25

2113740A40

2113740A40

2113741F25

2113740A40

2311049A01

2113741F49

Description

330pF 5% 50V

HQ 24pF 5%

HQ 36pF 5%

20pF 5% 50V

HQ 36pF 5%

HQ 36pF 5%

CL2

HQ 6.2pF 5%

HQ 39pF 5%

HQ 43pF 5%

HQ 36pF 5%

HQ 12pF 5%

3.3nF 50V

HQ 180pF 5%

10nF 50V

HQ 180pF 5%

10pF 5% 50V

10nF 50V

30pF 5% 50V

16pF 5% 50V

24pF 5% 50V

3.3nF 50V

20pF 5% 50V

10nF 50V

10nF 50V

1nF 50V

30pF 5% 50V

30pF 5% 50V

1nF 50V

30pF 5% 50V


10nF 50V

Circuit

Ref

C8621

C8622

C8623

C8631

C8632

C8633

C8634

C8642

D8551

D8553

D8601

D8631

J8501

C8604

C8611

C8612

C8615

C8617

C8618

C8619

C8620

C8552

C8553

C8554

C8556

C8558

C8600

C8602

C8603

J8601

L8501

L8503

Motorola

Part No.

Description

2113741F25

2113741F49

2113740F63

2113741F25

2111078B42

2113740F11

2113740F45

2113741F25

4802482J02

4880236E05

4813832B35

4802482J02

0905901V02

2111078B16

2111078B15

HQ 13pF 5%

HQ 12pF 5%

2111078B080 HQ 6.2pF 5%

2113741F25 1nF 50V

2113740F20

2113740A67

2113740F51

2113741F25

5.1pF 5% 50V

330pF 5% 50V

100pF 5% 50V

1nF 50V

2311049A45

2113741F17

2113741F49

2113741F25

2113740A67

2311049A08

2113740F51

2113740F20


470pF 50V

10nF 50V

1nF 50V

330pF 5% 50V USD

TANT CP 1uF 10% 35V

100pF 5% 50V NP0

5.1pF 5% 50V

0905902V04

2460591C23

2462587T38

1nF 50V

10nF 50V

330pF 5% 50V

1nF 50V

CAP ALT E21

2.2pF 5% 50V

56pF 5% 50V

1nF 50V

DIODE PIN MA/COM

DIODE CHIP SCHOTTKY

DIODE TRANSORB

DIODE PIN MA/COM

CONNECTOR ANTENNA

BNC

CONNECTOR POWER

W/GASKET

SQUARE COIL 16nH 3T

COIL CHIP 22nH 5%

5-12

www.myradio168.net

Circuit

Ref

L8552

L8553

L8600

L8601

L8611

L8631

Q8510

Q8520

L8531

L8532

L8533

L8534

L8539

L8541

L8542

L8551

Motorola

Part No.

2460591C23

2484657R01

2460591C23

2484657R01

2460591M77

2460591X01

2484657R01

2460591X02

2460591X02

2460591X02

2484657R01

2484657R01

2484657R01

2462587T23

4813827A26

4813827D13

R8511

R8512

R8513

R8514

R8515

R8522

R8523

R8525

R8527

Q8530

Q8531

Q8611

Q8612

Q8621

R8501

R8502

4813827A36

4813827A36

4813824A17

4813824A10

4813824A17

0662057C19

0662057A21

0662057A01

0662057A01

0662057A57

0662057C55

0662057C44

0662057A49

0662057A49

0662057C19

0662057C19

Description

SQUARE COIL 16nH 3T

Ferrite Bead

SQUARE COIL 16nH 3T

Ferrite Bead

SQUARE COIL 38nH 4T

COIL SQUARE

Ferrite Bead

COIL SQUARE 25nH

COIL SQUARE 25nH

COIL SQUARE 25nH

Ferrite Bead

Ferrite Bead

Ferrite Bead

COIL CHIP 470nH

TSTR RF NPN MRF8372

TSTR 870MHZ PWR

MACRO-X

TSTR MRF 5003

TSTR MRF 5003

TSTR PNP 40V .2A

TSTR NPN 40V .2A

TSTR PNP 40V .2A

4R7 1/10W 5%

68 1/16W 5%

10 1/16W 5%

10 1/16W 5%

2k2 1/16W 5%

CHIP RES 150 0HMS 5%

51 1/10W 5%

1k 1/16W 5%

1k 1/16W 5%

4R7 1/10W 5%

4R7 1/10W 5%

Circuit

Ref

Motorola

Part No.

R8552

R8553

R8611

R8612

R8613

R8614

R8615

R8616

R8528

R8529

R8531

R8532

R8535

R8541

R8550

R8551

R8617

R8621

R8623

R8624

0680194M01

0662057A45

0662057C19

0662057C19

R8641 0680149M02

SH8501 2602642Y01

0662057A89

0662057A89

0680194M01

0683962T51

0683962T51

0680194M01

0662057A73

0662057A73

0662057A18

0683962T51

0662057A73

0662057A56

0662057A49

0662057A18

0662057A65

0680194M01

Description

47k 1/16W 5%

47k 1/16W 5%

10 1W 5%

120 1W 5%

120 1W 5%

10 1W 5%

10k 1/16W 5%

10k 1/16W 5%

51 1/16W 5%

120 1W 5%

10k 1/16W 5%

2k 1/16W 5%

1k 1/16W 5%

51 1/16W 5%

4k7 1/16W 5%

10 1W 5%

10 1W 5%

CHIP RES 680 OHMS 5%

4R7 1/10W 5%

4R7 1/10W 5%

THERMISTOR 100K @25

HEAT SPREADER


336-390MHz Synthesizer Schematic Diagram

5V_STAB

TP8701

C8703

0.1uF

R8700

0

LOCK_DET

FRACN_CE

MOD_IN

2_1MHZ

LOCK_DET_4

FRACN_CE_4

MOD_IN_4

2_1MHZ_4

C8701

100pF

R8701

270

R8702

C8702

330pF

270

0102725B85 GEPD5565 12,5kHz channel spacing

0102725B86 GEPD5565 20/25kHz channel spacing


C8700

0.1uF

C8713

.001uF

D8701-1 D8701-2

D8701-3

VR8701

10V

C8719

10uF

R8711

39

C8721

.01uF

C8720

.01uF

C8716

0.1uF

C8715

33pF

C8717

0.1uF

9V3

7

2 10

9

32

R8708

C8704

.01uF

10

C8714

.01uF

C8707

TP8702

.01uF

8

MODIN

11

FREFOUT

3

DC5V1

12

19

22

DC5V2

SUPFIN

DC5V3

23

DC5V4

14

XTAL1

15

XTAL2

16

WARP

U8701

FRACTN_IC

5V_STAB

R8703

1K

2 1

OUT 5VDC

Y8702

16.8MHz

GND

3

WARP

4

C8706

.01uF

C8709

0.1uF

TP5705

R8705

47K

C8711

10uF

IOUT

29

IADAPT

31

GND

GND

GND

GND

4

13

21

30

MODOUT

28

AUX3

1

PREIN

20

6

CLK

17 18

26 27

5

C8712

10uF

C8718

0.1uF

www.myradio168.net

R8723

100K

R8726

150K

NU

R8724

C8726

.01uF

560K

B

C8729

.01uF

NU

R8710

0

NU

R8712

2.7K

R8713

2.7K

used only for

725b85

C8722

1uF

R8714

150K

R8718

560K

C

C8723

.1uF

R8715

470

R8716

820

C8725

.1uF

R8717

100

F

D

C8724

1.0uF

NU

C8727

1uF

E

$P

C8728

3.3pF

NU

SPI_DATA

SPI_CLK

SPI_DATA_4

SPI_CLK_4

E8701 E8702


Diagrams and Parts Lists 5-13


Synthesizer Parts List

Circuit

Ref

D8701

E8701

R8700

R8701

R8702

R8703

R8705

R8708

C8719

C8720

C8721

C8722

C8723

C8725

C8726

C8727

C8711

C8712

C8713

C8714

C8715

C8716

C8717

C8718

C8700

C8701

C8702

C8703

C8704

C8706

C8707

C8709

Motorola

Part No.

2311049A19

2113741F49

2113741F49

2311049A07

2109720D14

2109720D14

2113741F49

0811051A19

4802233J09

2605915V01

0662057B47

0662057A35

0662057A35

0662057A49

0662057A89

0662057A01

2113743K15

2113740F51

2113741F13

2113743K15

2113741F49

2113741F49

2113741F49

2113743K15

2311049A63

2311049J26

2113741F25

2113741F49

2113740F39

2113743K15

2113743K15

2113743K15

Description

100nF 16V

100pF 5% 50V

330pF 50V

100nF 16V

10nF 50V

10nF 50V

10nF 50V

100nF 16V



1nF 50V

10nF 50V

33pF 5% 50V

100nF 16V

100nF 16V

100nF 16V


10nF 50V

10nF 50V

TANT CP 1uF 10% 16V

CER LOW DIST 100nF

CER LOW DIST 100nF

10nF 50V

MTLZ POLY 1uF 5%

DIODE TRIPLE SOT143-RH

SHLD PCB MOUNT 1

0 1/16W

270 1/16W 5%

270 1/16W 5%

1k 1/16W 5%

47k 1/16W 5%

10 1/16W 5%

Circuit

Ref

R8711

R8712

R8713

R8714

R8715

R8716

R8717

R8718

R8723

R8724

U8701

Motorola

Part No.

0662057A15

0662057A59

0662057A59

0662057B02

0662057A41

0662057A47

0662057A25

0662057B16

0662057A97

0662057B16

5105457W72

VR8701 4813830A23

Y8702 4809863M01

Description

39 1/16W 5%

2k7 1/16W 5%

2k7 1/16W 5% (12.5kHz)

150k 1/16W

470 1/16W 5%

820 1/16W 5%

100 1/16W 5%

560k 1/16W 5%

100k 1/16W

560k 1/16W 5%

CC QFP CONT FRAC-N

91W59

10V 5% 20mA 350mW

REF OSC 16.8 MHZ

5-14

www.myradio168.net


336-390MHz Voltage Controlled Oscillator Schematic Diagram

F

B

C

D

R8801

100

C8807

10000pF

0102725B87 GEPD5567 VCO

E

C8801

.001uF

C8802

43pF

L8801

22nH

3

D8801

2 1 R8802

100K

C8803

.01uF

D8802

1 2

L8802

470nH

D8803

3

3

2

1

C8809

39pF

C8810

39pF

L8803

82nH

L8804

T45

R8821

680

R8822

470

NU www.myradio168.net

Q8801

5

4

1

R8803

47K

3

2DTC143ZK

2

C8804

3.3pF

R8804

33

C8812

27pF

C8813

12pF

D8804

C8817

G

R8805

10K

S

D

.001uF

Q8802

C8816

.001uF

R8806

33

C8814

12pF

C8815

68pF

L8805

1uH

5V_STAB

R8836

10

R8851

33

C8851

33pF

R8853

10K

R8852

15K

Q8851

C8853

100pF

L8851

22nH

R8855

270

C8855

10pF

C8856

27pF

R8854

100

C8858

27pF

R8856

150

R8858

C8857

12pF

R8859

39

R8860

10K

Q8852

C8861

330pF

R8857

1.5K

L8852

22nH

C8862

1.5pF

C8864

4.7pF

R8862

150

C8863

30pF

FLT_9V3

R8863

10

C8869

0.1uF

C8867

15pF

R8864

10

C8865

10pF

R8861

C8866

6.8pF

R8882

3.3K

R8881

10

R8883

10K

C8881

100pF

R8884

10K

Q8881

R8885

R8887

150

C8885

.01uF

C8883

7.5pF

C8884

6.8pF

4

5

T8821

3

2

1

C8821

.001uF

C8820

1pF

NU

2

1

D8821

3

R8824

1.5K

NU

C8822

100pF

R8825

270

C8831

0.1uF

R8832

1.5K

R8834

470

NU

R8835

100

R8831

22

C8832

L8831

27pF

C8833

10pF

Q8831

R8833

560

C8835

NU

1pF

C8834

27pF

C8836

15pF

R8837

150

R8843

270

C8882

100pF

R8841

470

C8841

R8842

51

100pF

R8845

1K

NU

R8844

2.7K

R8846

0

C8842

.001uF

Q8841

C8843

.001uF

R8847

R8886

100

C8844

5.6pF

FLT_9V3

R8888

10

C8886

43pF

R8889

270

9V3_1_4

C8870

0.1uF

9V3_4

C8868

EXCITER_PA_4

100pF

R8865

270

EXCITER_PA

VCO_MIXER_4

9V3

VCO_MIXER

9V3

R8891

22

C8891

.220uF

SM

U8891

LP2951CM

8

7

3

INPUT

FEEDBACK

SHUTDOWN

OUTPUT

ERROR

SENSE

5V_TAP

GND

4

1

5

2

6

C8892

.022uF

C8893

10uF

5V_STAB_4

5V_STAB

E8801

NU

E8802



5-16


Voltage Controlled Oscillator

Parts List

Circuit

Ref

C8844

C8851

C8853

C8855

C8856

C8857

C8858

C8861

C8831

C8832

C8833

C8834

C8836

C8841

C8842

C8843

C8812

C8813

C8814

C8815

C8816

C8817

C8821

C8822

C8801

C8802

C8803

C8804

C8807

C8809

C8810

Motorola

Part No.

2113743K15

2113740F37

2113740F27

2113740F37

2113740F31

2113740F51

2113741F25

2113741F25

2113740F21

2113740F39

2113740F51

2113740F27

2113740F37

2113740F29

2113740F37

2113741F13

2113741F25

2113740F42

2113741F49

2113740F17

2113741A45

2113740F41

2113740F41

2113740F37

2113740F31

2113740F29

2113740F47

2113741F25

2113741F25

2113741F25

2113740F51

Description

100nF 16V

27pF 5% 50V

10pF 5% 50V

27pF 5% 50V

15pF 5% 50V

100pF 5% 50V

1nF 50V

1nF 50V

5.6pF 5% 50V

33pF 5% 50V

100pF 5% 50V

10pF 5% 50V

27pF 5% 50V

12pF 5% 50V

27pF 5% 50V

330pF 50V

1nF 50V

43pF 5% 50V

10nF 50V

3.9pF 5% 50V

CAP CHP 10nF 50V

39pF 5% 50V

39pF 5% 50V

27pF 5% 50V

15pF 5% 50V

12pF 5% 50V

68pF 5% 50V

1nF 50V

1nF 50V

1nF 50V

100pF 5% 50V

Circuit

Ref

Motorola

Part No.

2113740F07

2113740F38

2113740F19

2113740F27

2113740F23

2113740F21

2113740F51

2113743K15

2113743K15

2113740F51

2113740F51

2113740F24

2113740F23

2113741F49

2113740F42

2113743A23

2113743E07

2311049A63

4805649Q13

C8870

C8881

C8882

C8883

C8884

C8885

C8886

C8891

C8862

C8863

C8864

C8865

C8866

C8867

C8868

C8869

C8892

C8893

D8801-

D8803

D8804

D8821

4880236E05

4805218N57

E8802

L8801

L8802

L8803

L8804

2602641Y02

2462587T38

2462587T23

2462587T14

0105950T45

L8805

L8831

L8851

L8852

Q8801

2462587T30

2462587T38

2462587T38

2462587T38

4805921T09

Description

1.5pF 5% 50V

30pF 5% 50V

4.7pF 5% 50V

10pF 5% 50V

6.8pF 5% 50V

15pF 5% 50V

100pF 5% 50V

0.1uF

0.1uF

100pF 5% 50V

100pF 5% 50V

7.5pF 5% 50V

6.8pF 5% 50V

10nF 50V

43pF 5% 50V

220nF 16V

22nF 16V

10uF

DIODE VCTR 1SV228

SOT23

DIODE CHIP SCHOTTKY

DIODE DUAL SCHOTTKY

SOT23

SHIELD VCO

COIL CHIP 22nH

COIL CHIP 470nH

COIL CHIP 82nH

COIL HELICAL MOLDED

FIN .175

COIL CHIP 1uH

COIL CHIP 22nH 5%

COIL CHIP 22nH 5%

COIL CHIP 22nH 5%

XSTR DUAL ROHM FMG8 www.myradio168.net

Circuit

Ref

Q8802

Motorola

Part No.

4813823A05

Q8831 4813827A07

Q8841 4813827A07

Q8851 4813827A07

Q8852 4813827A07

Q8881 4813827A07

0662057A25

0662057A97

0662057A89

0662057A13

0662057A73

0662057A13

0662057A45

0662057A35

0662057A09

0662057A53

0662057A43

0662057A25

0662057A01

0662057A29

0662057A41

0662057A18

0662057A35

0662057A59

0662057B47

0662057A13

0662057A13

0662057A77

0662057A73

0662057A25

R8831

R8832

R8833

R8835

R8836

R8837

R8841

R8842

R8801

R8802

R8803

R8804

R8805

R8806

R8821

R8825

R8843

R8844

R8846

R8847

R8851

R8852

R8853

R8854

Description

10k 1/16W 5%

33 1/16W 5%

680 OHMS 5%

270 1/16W 5%

22 1/16W 5%

1k5 1/16W 5%

560 1/16W 5%

100 1/16W 5%

10 1/16W 5%

150 1/16W 5%

470 1/16W 5%

51 1/16W 5%

270 1/16W 5%

2k7 1/16W 5%

0 1/16W

33 1/16W 5%

33 1/16W 5%

15k 1/16W 5%

10k 1/16W 5%

100 1/16W 5%

TSTR N-CH RF JFET

MMBU310LT1

TSTR NPN SML SIG

MMBR9

TSTR NPN SML SIG

MMBR9

TSTR NPN SML SIG

MMBR9

TSTR NPN SML SIG

MMBR9

TSTR NPN SML SIG

MMBR9

100 1/16W 5%

100k 1/16W

47k 1/16W 5%

33 1/16W 5%

Circuit

Ref

R8863

R8864

R8865

R8881

R8882

R8883

R8884

R8885

R8855

R8856

R8857

R8858

R8859

R8860

R8861

R8862

R8886

R8887

R8888

R8889

R8891

T8821

U8891

Motorola

Part No.

0662057A35

0662057A29

0662057A53

0662057A73

0662057A15

0662057A73

0662057A25

0662057A29

0662057A01

0662057A01

0662057A35

0662057A01

0662057A61

0662057A73

0662057A73

0662057A01

0662057A25

0662057A29

0662057A01

0662057A35

0662057A09

2505515V03

5105469E65

Description

270 1/16W 5%

150 1/16W 5%

1k5 1/16W 5%

10k 1/16W 5%

39 1/16W 5%

10k 1/16W 5%

100 1/16W 5%

150 1/16W 5%

10 1/16W 5%

10 1/16W 5%

270 1/16W 5%

10 1/16W 5%

3k3 1/16W 5%

10k 1/16W 5%

10k 1/16W 5%

10 1/16W 5%

100 1/16W 5%

150 1/16W 5%

10 1/16W 5%

270 1/16W 5%

22 1/16W 5%

XFMR MIXER SMD 4:1

VLTG REGLTR LP2951C


336-390MHz RX-FE Schematic Diagram

9V3

9V3

9V3_2

9V3_2_3

K9V1_2

K9V1

PA_RX

PA_RX_2

C8306

L8406

3

C8301

2.7pF

C8331

330pF

XX

XX

D8311

XX

R8311

4.7K

R8315

1.5K

C8302 C8303

1.8pF

C8326

1.5pF

NU

D8301

6.8pF

D8302

C8327

1.5pF

NU

R8312

4.7K

L8408

3

3

D8303

R8302

330

C8307

.0033uF

C8310

330pF

C8322

.01uF

C8308

.001uF

Q8302

C8311

.0033uF

C8309

R8313

10K

100pF

R8305

10K

R8303

2.7K

L8302

470nH

1 2

R8306

150

Q8301

R8304

3.9K

R8320

0

R8321

10

C8323

39pF

C8300

33pF

R8301

100K

FE_CNTL_VLTG

FE_CNTL_VLTG_2

C8304

39pF

C8305

39pF

C8319

.001uF

VCO_MIXER

VCO_MIXER_2

TP8301

TP8302

R8317

270

R8318

270

R8307

100

R8319

82

R8308

150

L8407

C8312

.001uF

C8325

3.3pF

3

C8321

39pF

R8309

100K

C8320

.001uF

www.myradio168.net

C8313 C8314

C8328

1.5pF

NU

1.8pF

12pF

C8329

1.5pF

D8304 D8305

NU

C8315

43pF

C8316

39pF

C8317

39pF

L8409

3

R8310

10

R8314

270

NU

R8316

470

C8318

10pF

5V_STAB

5V_STAB_2_IN

L8401

470nH

RX_IF_2

RX_IF

R8401

51

L8402

150nH

C8404

82pF

D8401

5

4

T8401

1

2

3

R8402

560

R8403

560

NU

C8400

330pF

C8406

10pF

L8403

27nH

C8401

15pF

NU

C8405

6.8pF

L8404

15nH

C8402

15pF

3

2

1

T8402

4

5

C8407

C8403

18pF

5V_STAB_2_OUT

IF_4

5V_STAB

0102725B88 GEPD5526 Front End 336 - 390 MHz


E8301

NU


5-17


RX-FE Parts List

Circuit

Ref

C8325

C8331

C8400

C8402

C8403

C8404

C8405

C8406

C8316

C8317

C8318

C8319

C8320

C8321

C8322

C8323

C8308

C8309

C8310

C8311

C8312

C8313

C8314

C8315

C8300

C8301

C8302

C8303

C8304

C8305

C8306

C8307

Motorola

Part No.

2113740F41

2113740F41

2113740F27

2113741F25

2113741F25

2113740F41

2113741F49

2113740F41

2113740F15

2113741F13

2113740F63

2113740F31

2113740F33

2113740F49

2113740F23

2113740F27

2113740F39

2113740F13

2113740F09

2113740F23

2113740F41

2113740F41

2113741F37

2113741F37

2113741F25

2113740F51

2113741F13

2113741F37

2113741F25

2113740F09

2113740F29

2113740F42

Description

39pF 5% 50V

39pF 5% 50V

10pF 5% 50V

1nF 50V

1nF 50V

39pF 5% 50V

10uF 5% 50V

39pF 5% 50V

3.3pF 5% 50V

330pF 50V

330pF 5%

15pF 5% 50V

18pF 5% 50V

82pF 5% 50V

6.8pF 5% 50V

10pF 5% 50V

33pF 5% 50V

2.7pF 5% 50V

1.8pF 5% 50V

6.8pF 5% 50V

39pF 5% 50V

39pF 5% 50V

3.3nF 50V

3.3nF 50V

1nF 50V

100pF 5% 50V

330pF 50V

3.3nF 50V

1nF 50V

1.8pF 5% 50V

12pF 5% 50V

43pF 5% 50V

5-18

Circuit

Ref

C8407

D8301

D8302

D8303

D8304

D8305

D8311

Motorola

Part No.

2113740F63

4862824C01

4862824C01

4880154K03

4862824C01

4862824C01

4813833C02

D8401

L8302

L8401

L8402

L8403

L8404

Q8301

4880174R01

2462587T23

2462587T23

2462587T17

2462587N46

2462587N43

4813827A07

Q8302 4813824A17

R8309

R8310

R8311

R8312

R8313

R8315

R8316

R8317

R8301

R8302

R8303

R8304

R8305

R8306

R8307

R8308

0662057A97

0662057A37

0662057A59

0662057A63

0662057A73

0662057A29

0662057A25

0662057A29

0662057A97

0662057A01

0662057A65

0662057A65

0662057A73

0662057A53

0662057A41

0662057A35

Description

100k 1/16W

330 1/16W 5%

2k7 1/16W 5%

3k9 1/16W 5%

10k 1/16W 5%

150 1/16W 5%

100 1/16W 5%

150 1/16W 5%

100k 1/16W

10 1/16W 5%

4700 1/16W 5%

4700 1/16W 5%

10k 1/16W 5%

1500 1/16W 5%

470 1/16W 5%

270 1/16W 5%

330pF 5%

DIODE VARACTOR

DIODE VARACTOR

DUAL SCHOTTKY SOT23

DIODE VARACTOR

DIODE VARACTOR

DIODE DUAL SOT

MMBD6100

DIODE QUAD SOIC 8 PIN

COIL CHIP 470nH

COIL CHIP 470nH

COIL CHIP 150nH

IND Chip 27.0 N 5%

IND Chip 15.0 N 5%

TSTR NPN SML SIG

MMBR9

TSTR PNP 40V .2A GENP B

=100-300 www.myradio168.net

Circuit

Ref

R8318

R8319

R8320

R8401

R8402

T8401

T8402

Motorola

Part No.

0662057A35

0662057A23

0662057C01

0662057A18

0662057A43

2505515V03

2505515V04

Description

270 1/16W 5%

82 1/16W 5%

0 1/10W 5%

51 1/16W 5%

560 1/16W 5%

XFMR JEDI MIXER SMD 4:1

XMFR MIXER 5:1


336-390MHz RX-IF Schematic Diagram

RX_IF

RX_IF_3

C5200

22pF

1

IN

Y5201

3

OUT

GND

2

CASE

4

L5201

1200nH

C5202

15pF

C5201

4.7pF

R5201

10K

C5204

.100uF

R5202

33K

C5203

.100uF

R5203

6.8K

Q5201

5V_STAB

R5204

100

R5205

2K

C5205

18pF

C5206

20pF

NU

L5202

1200nH

NU

R5211

820 www.myradio168.net

R5206

10

L5206

33000nH

NU

D5201

2 1

IN

1

Y5202

OUT

3

R5207

0

3

L5203

1.2uH

GND

2

CASE

4

C5208

C5207

20pF

NU

.100uF

C5221

10uF

2

1

Y5211

45.645MHz

C5212

15pF

C5211

15pF

L5211

1.2uH

C5215

.220uF

C5214

3.9pF

C5213

36pF

R5212

5.6K

5V_FLT

5V_FLT

C5216

.220uF

C5220

.01uF

9V3

FL5204

XX

IN

NU

OUT

XX

GND

CASE

XX XX

FL5203

XX NU XX

IN OUT

GND

XX

CASE

XX

R5217

NU

2 2

3

4

FL5201

FILTER

INSTPAR

FL5202

FILTER_6POLE

INSTPAR

1 3 1

FILTER

5

5V_FLT

C5222

.220uF

C5223

.1uF

C5224

.0015uF

8

MIXER_IN

4

5

PREAMP_OUT

6

PREAMP_IN

12

REG_5V_OUT

13

A+_B+

14

DRIVE

7

LO_IN

27

5V_TR

10

OSC_OUT

9

OSC_F_B

2

34 3 36 33

U5201

IF_IC

32 35 31

DEMOD

_OUT

29

AUD_BUF_IN

AUD_BUF_OUT

28

ADAPT

22

SQ_LIM_OUT

23

SQ_RECT_IN

20

RSSI_BP

25

ICO_TUNE

26

SQ_OUT

15

ACT_IND

18

C5231

1uF

C5225

4.7uF

R5221

150K

SQ_TAIL

16 19 21

1 11 17

C5227

4.7uF

5V_FLT

R5222

68K

C5226

.047uF

24

SQ_NOISE

30

C5229

.0047uF

R5223

6.8K

R5224

13K

C5232

100pF

C5234

0.1uF

C5233

100pF

C5237

0.1uF

C5235

100pF

C5228

0.1uF

C5230

.01uF

5V_FLT

R5225

100

R5216

10K

C5238

DET_AUDIO_3

ADAPT_3

SQ_ATT_3

C5239

0.1uF

SQ_ATT_OUT_3

51pF

CSQ_DET_3

FAST_SQ_3

C5236

100pF

5V_STAB

9V3

5V_STAB_3

9V3_3

RSSI_3

DET_AUDIO

ADAPT

SQ_ATT_IN

SQ_ATT_OUT

CSQ_DET

FAST_SQ

5V_STAB

9V3

RSSI

0102725B89 GEPD5527 12,5kHz channel spacing


E5201

NU




RX-IF Parts List

Circuit

Ref

C5231

C5232

C5233

C5234

C5235

C5236

C5237

C5238

C5223

C5224

C5225

C5226

C5227

C5228

C5229

C5230

C5212

C5213

C5214

C5215

C5216

C5220

C5221

C5222

C5200

C5201

C5202

C5203

C5204

C5205

C5208

C5211

Motorola

Part No.

2113743E20

2113741F29

2311049J11

2113743K15

2311049J11

2113743K15

2113741F25

2113741F49

2311049A07

2113740F51

2113740F51

2113743K15

2113740F51

2113740F51

2113743K15

2113743K15

2113740F35

2113740F19

2113740F31

2113743A19

2113743A19

2113740F33

2113743A19

2113740F31

2113740F31

2113740F40

2113740F17

2113743A23

2113743A23

2113741F49

2311049A63

2113743A23

Description

22pF 5% 50V

4.7pF 5% 50V

15pF 5% 50V

100nF 16V X7R

100nF 16V X7R

18pF 5% 50V

100nF 16V

15pF 5% 50V

15pF 5% 50V

36pF 5% 50V

3.9pF 5% 50V

220nF 16V

220nF 16V

10nF 50V


220nF 16V

100nF 16V

1.5nF 50V


100nF 16V


100nF 16V

1nF 50V

10nF 50V

TANT CP 1uF 10% 16V

100pF 5% 50V

100pF 5% 50V

100nF 16V

100pF 5% 50V

100pF 5% 50V

100nF 16V

100nF 16V Y5V

5-20

Circuit

Ref

Motorola

Part No.

R5212

R5216

R5221

R5222

R5223

R5224

R5225

U5201

Y5201

R5201

R5202

R5203

R5204

R5205

R5206

R5207

R5211

C5239

D5201

2113740F44

4880154K03

FL5201 9180098D06

FL5202 9180097D06

L5201

L5203

L5211

Q5201

2462587N69

2483411T74

2483411T74

4813827A07

0662057A73

0662057A85

0662057A69

0662057A25

0662057A56

0662057A01

0662057B47

0662057A47

0662057A67

0662057A69

0662057B05

0662057A93

0662057A63

0662057A76

0662057A61

5180207R01

9102652Y01

Y5202 9102652Y02

Y5211 4802653Y01

Description

51pF 5% 50V

Dual Schottky SOT23

Filter CER 4-EL 455kHz

Filter CER 6-EL 455kHz

CHIP IND 1200 NH

Inductor Chip Shielded

Inductor Chip Shielded

NPN SML SIG MMBR9

10k 1/16W 5%

33k 1/16W 5%

6k8 1/16W 5%

100 1/16W 5%

2k 1/16W 5%

10 1/16W 5%

0 1/16W

820 1/16W 5%

5k6 1/16W 5%

6k8 1/16W 5%

200k 1/16W

68k 1/16W 5%

3k9 1/16W 5%

13k 1/16W 5%

3k3 1/16W 5%

IF IC

XTAL FLTR 45.1MHZ

20/25KHz 80dB

XTAL FLTR 45.1MHZ

20/25KHz 80dB

XTAL OSC 44.645MHZ

www.myradio168.net



Appendix A

PL Codes

Table of Contents

Paragraph

1.0

Page

PL Codes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

PL (CTCSS) Codes

www.myradio168.net

A-i


A-ii

www.myradio168.net


PL Codes

1.0

PL Codes

The following PL Codes have been tested and are acceptable for programming into any transmit or receive frequency.

Code

4A

5Z

6A

7Z

M1

M3

1B

2A

3Z

3B

XZ

XB

YB

1Z

GROUP A

Freq

67.0

77.0

88.5

100.0

107.2

114.8

123.0

131.8

141.3

151.4

173.8

186.2

203.5

218.1

4B

5A

6Z

6B

7A

M2

2Z

2B

3A

4Z

XA

YZ

ZA

1A

GROUP B

Code Freq

71.9

82.5

94.8

103.5

110.0

118.8

127.3

136.5

146.2

156.7

167.9

179.9

192.8

210.7

GROUP C

Code

WZ

WA

WB

YA

ZZ

ZB

5B

8Z

Freq

69.3

74.4

79.7

85.4

91.5

97.4

162.2

206.5

www.myradio168.net

PL (CTCSS) Codes A-1

PL Codes

A-2

www.myradio168.net


Appendix B

Hand Held Control Head PMMN4005

Table of Contents

Appendix

B.1

Introduction/Theory of Operation

B.2

PCB/Schematic Diagram and Parts List


www.myradio168.net

Hand Held Control Head PMMN4005 B-i


B-ii

www.myradio168.net



Appendix B.1

Introduction/Theory of Operation

Table of Contents

Paragraph

1.0

Page

Overview

..................................................................................................... 1

2.0


.................................................................................. 1

2.5

2.6

2.7

2.8

2.1

2.2

2.3

2.4

General ........................................................................................................ 1

Power Supplies............................................................................................ 1

Power On / Off ............................................................................................. 2

PTT Button................................................................................................... 2

ON/OFF Hook Control ................................................................................. 2

Keypad and Top Keys ................................................................................. 3

Status LED and Back Light Circuit............................................................... 3

Liquid Crystal Display (LCD)........................................................................ 4

2.9

Microphone Amplifier ................................................................................... 4

2.10

Connections to the Radio ............................................................................ 4

2.11

Electrostatic Transient Protection ................................................................ 5 www.myradio168.net

Introduction/Theory of Operation B.1-i


B.1-ii

www.myradio168.net


B.1

1.0

Overview


ON/OFF

EMERGENCY

CLEAR

TOP KEYS

INDICATOR LED

PTT

FRONT MIC PORT

Overview

2.0


2.1

General

The Hand Held Control Head contains the microphone, 3 top buttons and 1 side button (PTT button) and 22 keypad buttons to operate the radio, several indicator Light Emitting Diodes (LED) and 7 icons of LCD Display to inform the user about the radio status and 10 character (5x7dot matrix)

Liquid Crystal Display (LCD) for radio information e.g. channel number, unit or group address.

2.2

Power Supplies

pin 8. This voltage is at battery level and is used for the voltage regulator (U0971), the indicator

LEDs, the back light and to power up the radio via the On/Off button. The voltage regulator (U0971) provides the stabilized 5 volt source for the LCD driver, the shift register, inverter and the keypad buttons. The regulated output of U0971 is enabled by a low state and disabled by a high state at pin

3 (SHUTDOWN) to switch the HHCH circuits on and off. Input and output capacitors (C0972, C0975 and C0976) are used to reduce high frequency noise and provide proper operation during battery transients.

Introduction/Theory of Operation B.1-1


2.3

2.4

2.5

Power On / Off

The On/Off button when pressed switches the radio’s voltage regulators on by pulling ON OFF

CONTROL to high via D0971 and connects the base of Q0971 to FLT A+. This transistor pulls the line ANALOG 3 to low to inform the µP that the On/Off button is pressed. If the radio is switched off, the µP will switch it on and vice versa. If the On/Off button is pressed and held while the radio is on, the software detects a low state on line ANALOG 3 and switches the radio off.

While the radio is switched on, the radio’s controller enables the regulated output pin 1 of U0971 by setting line LED CE to high and in turn pulling input U0971-3 to ground by transistor Q0972. Line

LED CE is also used to write data into the shiftregister U0983. After the serial write process line LED

CE is set to low for a few microseconds to update the output of the shiftregister with the new data.

The low - pass filtering provided by C0973 and R0974 filters out these small low periods and prevents disabling of the voltage regulator output.

PTT Button

The PTT function is achieved by pressing button S0901 which places a low on the PTT line to the radio, causing the radio to transmit.

ON/OFF Hook Control

When the HHCH is off-hook the monitor input (line HOOK; J0901_7) to the radio is open circuit.

When the HHCH is placed on-hook the hang up clip shorts the TP0901 and TP0902 terminals which takes the monitor input to ground, indicating to the radio that the microphone is on-hook. Diode

VR0922 and C0922, C0923 provide Electro Static Discharge (ESD) and Radio Frequency

Interference (RFI) protection.

www.myradio168.net

B.1-2 Introduction/Theory of Operation


2.6

Keypad and Top Keys

The HHCH keypad has 22 keys, plus 3 additional top keys, the on/off key being one of them, which are located on the top of the HHCH.

All keys of the keypad are configured as 2 analogue lines (ANALOG_1 & ANALOG_2) to the radio.

The microprocessor in the mobile radio will compare the voltage when any one of the keypad row or keypad column keys is being pressed. The microprocessor will then sample the Analog to Digital voltages at the keypad row and keypad column and map it with the table (shown as below) so that the key being pressed can be identified. Once the key has been identified, the message that corresponds to the key will show up at the display.

ANALOG_2 /V

ANALOG_1 /V

(R1)

0

(R2)

1.21

(R3)

2.31

(R4)

3.29

(R5)

4.18

(C1)

0

S21

(<OPT)

S31

(1)

S41

(4)

S51

(7)

(C2)

1.21

S22

(S)

S32

(2)

S42

(5)

S52

(*)

(C3)

2.31

S13

(EDIT)

S23

(Phone)

S33

(3)

S43

(6)

S53

(0)

(C4)

3.29

S14

(Alarm)

S24

(Vol ^)

S34

(Vol

∨

)

S44

(8)

S54

(#)

(C5)

4.18

S15

(RD)

S25

(Mode ^)

S35

(Mode

∨

)

S45

(9)

Normally, the ANALOG_1 and ANALOG_2 is 5V (without pressing any key)

The three top keys are configured to ANALOG_3 to the radio. The voltage on the analogue lines depends on which key is pressed. (0V for ON/OFF Button, 1.31V for EMG Button and 2.55V for CLR

Button).

The voltages of these lines (ANALOG _1, 2 & 3) are A/D converted inside the microprocessor on the mobile radio and are used to specify the pressed button.

2.7

All the indicator LEDs (2) and the back light LEDs (18) are driven by current sources Q0982 –

Q0985 and controlled by the microprocessor in mobile radio via SERIAL PERIPHERAL INTERFACE

(SPI). Shift Register U0983 stores the LED status. To update the LED status line LED CLCK BUF shifts the data of line SPI DATA BUF into the Shift Register. When all the data has been written, line

LED CD is set to low for a few microseconds to update the output of the Shift Register with the new data.



2.8

2.9

Liquid Crystal Display (LCD)

The LCD display is a 10 character 5 X 7 dot matrix display which incorporates 7 icons. Data is loaded serially into the display driver U0951 via the SPI interface. The display data of line SPI DATA

BUF is shifted by clock signal LCD CLCK BUF. When the last bit has been received, the LCD display is updated.

Microphone Amplifier

The microphone cartridge contains a capacitive transducer coupled to a FET amplifier. The microphone’s audio signal is fed from the microphone inputs, MIC+ and MIC-, at J0903 to the microphone amplifier. The microphone amplifier sets the frequency response and amplifies the audio signal to the required radio input level (about 80mV at nominal sound pressure level). The first stage (Q0902 connected to the microphone is an active high-pass filter which suppresses frequency components below 300 Hz to prevent PL falsing in a receiving radio. The collector current of Q0902, drawn from the collector of the following stage Q0901, is approximately 0.27 mA. A low pass filter composed of R0904 and C0907, C0908 filters out any audio frequency components riding on this voltage. The output of the first stage is fed via R0906 to the second stage (Q0901) which amplifies the audio signal to the radio’s input level. The supply voltage of the stage is provided by the radio’s

9V3 voltage regulator via the load resistor (1k ohm) located on the radio’s controller section, line

MIC and connector J0901 pin 12. Q0901 draws a collector current of 2 mA. The collector AC current of Q0901 causes a voltage drop across the load resistor representing the audio signal from the microphone.

2.10

Connections to the Radio

Interconnections between the HHCH and the host radio are via an expanding cable which is permanently connected to the HHCH. The cable has an 18 pin Molex connector which connects to connector P0951 in the blank head of the host radio. P0951 is mounted on an adapter PCB. After additional filtering the signals are fed to the host radio’s main PCB via connector J0950, also located on the adapter PCB, a flexible ribbon cable and connector J0101. The connections between the

PCB in the HHCM and the main PCB in the radio are shown in the following table: www.myradio168.net

B.1-4 Introduction/Theory of Operation


Radio

5

7

8

6

10

11

17

18

16

3

12

1

2

13

4

J0101

Adapter

14

12

3

16

7

2

1

11

13

9

8

6

15

18

17

J0950

PCB

3

12

10

6

7

4

1

14

13

9

8

16

15

18

17

P0951

Cable

16

7

9

13

12

5

6

15

18

3

4

10

11

Connector

1

2

HHCH

11

10

1

15

8

2

3

5

12

7

9

-

-

14

13

J0901

Description

INT SPKR+ (NU)

INT SPKR- (NU)

ANALOG 3

PTT

ANALOG 1

ANALOG 2

FLT A+

ON OFF CONTROL

LCD CLCK BUF

SPI DATA BUF

LED CLCK BUF

GND

MIC

HOOK

LED CE

2.11

Electrostatic Transient Protection

Electrostatic transient protection is provided for the sensitive components in the HHCM by diodes

VR0901, VR0921, VR0922, VR0924 - VR0929. The diodes limit any transient voltages to tolerable levels. The associated capacitors provide Radio Frequency Interference (RFI) protection.

www.myradio168.net



B.1-6

www.myradio168.net



Appendix B.2

PCB/Schematic Diagram and Parts List

Table of Contents

Description Page

HHCH PMMN4005 - Diagrams and Parts Lists

PCB Layout Component Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

PCB Layout Solder Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 www.myradio168.net

PCB/Schematic Diagram and Parts List B.2-i


B.2-ii

www.myradio168.net

PCB/Schematic Diagram and Parts List

D0973 D0975

Component Side

DS1

D0994

D0987

D0985

D0992

D0993

D0983

D0981

D0991

D0990

D0986

D0984

D0982

D0989

D0988

74

D451-02-O

Diagrams and Parts List

www.myradio168.net


S0904

S0903

S0902

Q0984

R0998

R0983

R0985

R0984

R0977

R0978

C0983

C0984

Q0981

15

17

80

100

U0951

51

30

R1002

R1001

D1001

C1002

C0923

VR0922

TP0901

TP0902

R0952

R0995

C0951

C0927

C0929

R0901

VR0901

VR0929

R0959

R0958

R0957

R0950

R0904

C0921

C0907

C0910

Q0902

R0913

3

4

U1001

R0981

J0901

C0926

C0920

R0994

C0931

C0941

C0928

16

D0971

C0974

C0972

Q0971

R0992

R0986

D0972

R0988

1

2

Q0983

4

3

R0991

R0990

Solder Side

D451-03-O


PCB No. 8485770Z01

B.2-1


www.myradio168.net

B.2-2 Diagrams and Parts List

Hand Held Control Head Schematic Diagram

+5V

VLCD1 VLCD2 VLCD3 VLCD4 C1 C2 C3 C4 C5 C6

R0956

22K

R0957

22K

R0958

22K

R0959

22K

S7 S8 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S31 S32 S33 S34 S35 S36 S37 S38 S40 S41 S42 S43 S44 S45 S46 S47 S48 S49 S50 S51 S52 S53 S54 S55 S56 S57 S58 S59 S60 S61 S62 S63 S64

R0931

51K

R1

J0901-12

MIC

J0901-13

PTT

J0901-7

HOOK.VPP

J0901-8

FLT_A+

J0901-15

GND

J0901-14

ANALOG_3

C0951

470pF

R0901

10

R0904

1.2K

VR0901

14V

C0901

470pF

C0902

NU

C0903

0.1uF

C0904

1000pF

Q0901

C0907

10uF

C0908

1000pF

S0901

SWITCH

PTT

VR0921

5.6V

C0921

1000pF

1

3

TAB1

2

7

R0902

22

C0905

1000pF

R0903

1.2K

C0906

10uF

TAB2 TAB3 TAB4

4 5 6

VR0922

14V

C0922

0.1uF

C0923

470pF

C0920

470pF

1

TP0901

1

TP0902

R0950

4.7K

FLT_A+

1

3

R0951

4.7K

R0952

4.7K

S0903

SWITCH

EMG

TAB1

2

7

R0953

4.7K

1

3

S0904

SWITCH

CLR

TAB1

2

7

R0906

820

+5V

TAB3 TAB4

4 5 6

TAB2 TAB3

4 5

Q0902

C0909

.01uF

R0907

1MEG

S0902

SWITCH

ON/OFF

Q0971

47K

47K

R0971

4.7K

1

3

TAB1

TAB2 TAB3

4 5 6

2

7

C0972

0.1uF

FLT_A+

R0973

47K

U0971

LP2951C

8

7

3

INPUT

OUTPUT

FEEDBACK

SHUTDOWN

ERROR

SENSE

5V_TAP

1

5

2

6

D0971

R0909

150K

C0910

.01uF

R0908

330K

C0974

.01uF

R0911

2.2K

C0911

.033uF

R0912

560

R0913

560

C0912

1000pF

C0975

10uF

+5V

C0976

0.1uF

C0913

24pF www.myradio168.net

J0903-1

J0903-2

MIC+

MIC -

J0901-2

ON_OFF_CONTROL

J0901-3

ANALOG_1

J0901-5

ANALOG_2

J0901-1

LED_CLCK_BUF

J0901-10

SPI_DATA_BUF

J0901-11

LCD_CLCK_BUF

J0901-9

LED_CE

C1002

0.22uF

D1001

C0971

470pF

C0931 C0941

470pF

470pF

C0926

470pF

C0927

470pF

C0929

470pF

C0928

470pF

+5V

R0972

4.7K

R0954

10K

C0952

56pF

R0974

22K

VR0928

5.6V

VR0929

5.6V

R0955

62K

Q0972

47K

C0973

0.1uF

47K

VR0927

5.6V

VR0926

NU

CL190UR

D0973

CL190G

D0975

Q0981

47K

47K

2

U1001

TC7ST04FU

+5V

R0981

10K

+5V

R0982

47K

U0983

MC14094B

STROBE

3

15

CLK

QS

QS*

EN_OE

Q1

Q2

1

2

SER_DAT

GND

Q3

Q4

Q5

Q6

Q7

Q8

9

10

4

5

6

7

14

13

12

11

C0983

10uF

C0984

0.1uF

NC

4

1

R0984

47K

R0983

330

Q0984

R0985

330

Q0985

R0977

330

FLT_A+

R0990

220

R0991 R0992

220 220

R0993

220

R0994

220

R0995

220

R0996

220

R0997

39

R0998

39

R0978

47K

R0979

330

D0981 D0983 D0985 D0987 D0989 D0991 D0993

CL-220

D0995

CL-220

D0997

D0982 D0984 D0986 D0988 D0990 D0992 D0994

CL-220 CL-220

D0996 D0998

R0986

22K

+5V

Q0982

R0988

1.5K

R0987

NU

R0989

100K

D0972

Q0983

R0999

10

C1001

0.1uF

Q1001

R1002

7.5K

C1003

0.1uF

R1001

100K

NC1 NC2 NC3 NC4 NC5 NC6 NC7 NC8 NC9

TEST1 TEST2 TEST3

U0951

LCD

VSS1

+5V

R0941

51K

C1

R0942

13K

C2

R0943

22K

C3

R0944

43K

C4

R0945

130K

C5

+5V

R0932

13K

R0933

22K

R3

R0934

43K

R4

R0935

130K

R5

2 3 4 5 70 71 72 73

COM1 COM2 COM3 COM4 COM5

NC2 NC3 NC4 NC5 NC6 NC7 NC8 NC9 NC10 NC11 NC12 NC13 NC14

S6 S7 S8 S9

S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21

LCD

S22 S23 S24 S25 S26 S27 S28 S29

DS1

NC15 NC16

S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 S41 S42 S43 S44 S45 S46 S47 S48 S49

OUT1 1

4 IN

OUT2 2

GND 3

S0913

SWITCH edit

S0914

SWITCH

OUT1 1

4 IN

OUT2 2

GND 3

"BELL"

OUT11

4

IN

OUT2 2

GND 3

S0915

SWITCH

RD

OUT1 1

4 IN

OUT2 2

GND 3

S0921

SWITCH option

OUT1 1

4 IN

OUT2 2

GND3

S0922

SWITCH

S

OUT1 1

4 IN

OUT2 2

GND 3

S0923

SWITCH

"PHONE"

OUT11

4

IN

OUT22

GND3

S0924

SWITCH

Vol

OUT1 1

4 IN

OUT2 2

GND 3

S0925

SWITCH

Mode

OUT1 1

4 IN

OUT2 2

GND 3

S0934

SWITCH

Vol

OUT1 1

4

IN

OUT2 2

GND 3

S0935

SWITCH

Mode

OUT1 1

4

OUT2 2

GND 3

IN

S0931

SWITCH

1

OUT11

4

IN

OUT22

GND3

S0932

SWITCH

2

OUT1 1

4 IN

OUT2 2

GND 3

3

S0933

SWITCH

OUT1 1

4 IN

OUT2 2

GND 3

S0941

SWITCH

4

OUT1 1

4 IN

OUT2 2

GND 3

S0942

SWITCH

5

OUT1 1

4

IN

OUT2 2

GND 3

S0943

SWITCH

6

OUT1 1

4 IN

OUT2 2

GND 3

S0951

SWITCH

7

OUT1 1

4 IN

OUT2 2

GND 3

S0944

SWITCH

8

OUT1 1

4 IN

OUT2 2

GND 3

S0945

SWITCH

9

OUT1 1

4

IN

OUT2 2

GND 3

S0952

SWITCH

*

OUT1 1

4

IN

OUT2 2

GND 3

S0953

SWITCH

0

OUT1 1

4 IN

OUT2 2

GND 3

S0954

SWITCH

#

D451-01-O

Hand Held Control Head Schematic Diagram

Diagrams and Parts List B.2-3

Hand Held Control Head Parts List

Hand Held Control Head

Parts List

Circuit

Ref

C0971

C0972

C0973

C0974

C0975

C0976

C0983

C0926

C0927

C0928

C0929

C0931

C0941

C0951

C0952

C0910

C0911

C0912

C0913

C0920

C0921

C0922

C0923

C0901

C0903

C0904

C0905

C0906

C0907

C0908

C0909

Motorola

Part No.

2113741F17

2113741F17

2113741F17

2113741F17

2113741F17

2113741F17

2113741F17

2111078B36

2113741F17

2113743A19

2113743A19

2113741F49

2311049A63

2113743A19

2311049J23

2113741F17

2113743A19

2113741F25

2113741F25

2311049A63

2311049A63

2113741F25

2113741F49

2113741F49

2113743E10

2113741F25

2113740F36

2113741F17

2113741F25

2113743A19

2113741F17

Descritpion

470pF 50V

100nF 16V

1nF 50V

1nF 50V

TANT CP 10µF 10% 10V


1nF 50V

10nF 50V

10nF 50V

33nF 10%

1nF 50V

24pF 5% 50V

470pF 50V

1nF 50V

100nF 16V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

470pF 50V

56pF 100V

470pF 50V

100nF 16V

100nF 16V

10nF 50V


100nF 16V

TANT CP 10uF 10% 6V

Q0985

Q1001

R0901

R0902

R0903

R0904

R0906

R0907

R0908

R0909

Q0901

Q0902

Q0971

Q0972

Q0981

Q0982

Q0983

Q0984

D0973

D0975

D0995-

D0998

D1001

DSI

J0901

J0903

C0984

C1001

C1002

C1003

D0971

D0981-

D0994

D0972

Circuit

Ref

Motorola

Part No.

2113743A19

2109720D14

2113743F08

2113743A19

4813833C02

4805729G75

4813833C05

4805729G81

4805729G83

4805729G85

4813833C05

7285773Z01

2809926G05

2809926G01

4813824A10

4813824A10

4880048M01

4880048M01

4880048M01

4805128M16

4805780V01

4813824A10

4813824A10

4805218N63

0662057A01

0662057A09

0662057A51

0662057A51

0662057A47

0662057B22

0662057B10

0662057B02

Descritpion

100nF 16V

0.1uF 16V

0.22uF 16V

100nF 16V

DUAL SOT MMBD6100

LED SMT GREEN HP

BAV 99

RED LED 29G81

GREEN LED 29G83

LED SMT GREEN CL 220

BAV 99

LCD DISPLAY

CONN 1.25MM 15PIN

CONN 1.25MM 2PIN

NPN 40V .2A B=50-150

NPN 40V .2A B=50-150

NPN DIG 47k/47k

NPN DIG 47k/47k

NPN DIG 47k/47k

PNP MMBT 3906

NPN MJD 200

NPN 40V .2A B=50-150

NPN 40V .2A B=50-150

NPN BFQ 67W

10 1/16W 5%

22 1/16W 5%

1k2 1/16W 5%

1k2 1/16W 5%

820 1/16W 5%

1MEG 1/16W 5%

330k 1/16W 5%

150k 1/16W www.myradio168.net

R0941

R0942

R0943

R0944

R0945

R0950-

R0953

R0954

R0955

R0956-

R0959

R0971

R0911

R0912

R0913

R0931

R0932

R0933

R0934

R0935

R0983

R0984

R0985

R0986

R0988

R0989

R0972

R0973

R0974

R0977

R0978

R0979

R0981

R0982

Circuit

Ref

Motorola

Part No.

0662057A57

0662057A43

0662057A43

0662057V20

0662057V05

0662057V11

0662057V18

0662057V30

0662057V20

0662057V05

0662057V11

0662057V18

0662057V30

0662057A65

0662057A73

0662057A92

0662057A81

0662057A65

0662057A65

0662057A89

0662057A81

0662057C63

0662057A89

0662057C63

0662057A73

0662057A89

0662057C63

0662057A89

0662057C63

0662057A81

0662057A53

0662057A97

Descritpion

2k2 1/16W 5%

560 1/16W 5%

560 1/16W 5%

51k 1/16W 1%

13k 1/16W 1%

22k 1/16W 1%

43k 1/16W 1%

130k 1/16W 1%

51k 1/16W 1%

13k 1/16W 1%

22k 1/16W 1%

43k 1/16W 1%

130k 1/16W 1%

4.7k 1/16W 5%

10k 1/16W 5%

62k 1/16W 5%

22k 1/16W 5%

4k7 1/16W 5%

4k7 1/16W 5%

47k 1/16W 5%

22k 1/16W 5%

330 1/10W 5%

47k 1/10W 5%

330 1/10W 5%

10k 1/16W

47k 1/16W 5%

330 1/10W 5%

47k 1/16W 5%

330 1/10W 5%

22k 1/16W 5%

1.5k 1/16W 5%

100k 1/16W 5%

B.2-4

Circuit

Ref

Motorola

Part No.

0662057A33 R0990-

R0996

R0997

R0998

R0999

R1001

R1002

S0901-

S0904

U0951

U0971

U0983

0662057A15

0662057A15

0662057A01

0662057A97

0662057A70

4005840X02

5102463J71

5105469E65

5113806A35

U1001 5102463J61

VR0901 4813830A27

VR0921 4813830A15

VR0922 4813830A27

VR0927 4813830A15

VR0928 4813830A15

VR0929 4813830A15

Descritpion

220 1/16W 5%

39k 1/16W 5%

39k 1/16W 5%

10 1/16W 5%

100K 1/16W 5%

7.5K 1/16W 5%

SWITCH

LCD DRIVER MSM9005

IC VLTG REGLTR LP2951C

MC14094, REG, 8-

STAGE,SHIFT/STORE

INVERTER TC7ST04FU

DIODE 14V 5% 225mW

DIODE 5.6V 5% 225mW

DIODE 14V 5% 225mW

DIODE 5.6V 5% 225mW

DIODE 5.6V 5% 225mW

DIODE 5.6V 5% 225mW

Diagrams and Parts List



1999 by Motorola, Inc.

www.myradio168.net

11900 Penang, Malaysia

Printed in Malaysia

December, 1999

*6804111J89*

6804111J89-O

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