Motorola CP185 Series Basic Service Manual

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Manual No.:68007024004

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Disassembly

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i

COPYRIGHT

Copyrights

No part of this manual may be reproduced, transmitted, stored in a retrieval system, or translated into

any language or computer language, in any form or by any means, without the prior written

permission of Motorola Inc.

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,

but not limited to, 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, reproduced, modified, reverse-engineered, or

distributed 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.

Trademarks

MOTOROLA and the Stylized M Logo are registered in the U.S.Patent and Trademark Office. All

other product or service names are the property of their respective owners.

ii

SAFETY

Product Safety and RF Exposure Compliance

ATTENTION!

This is restricted to occupational use only to satisfy ICNIRP RF energy exposure

requirements. Before using this product, read the RF energy awareness information and

operating instructions in the Quick Reference Card enclosed with your radio (Motorola

Publication part number 68007024011) to ensure compliance with RF energy exposure limits.

For a list of Motorola-approved antennas, and other accessories, visit the following web site

which lists approved accessories: http://www.motorola.com/business

These servicing instructions are for use by qualified personnel only. To reduce the

risk of electric shock, do not perform any servicing other than that contained in the

Operating Instructions unless you are qualified to do so. Refer all servicing to

qualified service personnel.

Before using this product, read the operating instructions for safe usage contained

in the Quick Reference Card enclosed with your radio.

iii

DOCUMENT HISTORY

The following major changes have been implemented in this manual since the previous edition:

Edition Description Date

68007024004-A Initial edition Oct. 2008

68007024004-B Added VHF 136 – 174 MHz information Feb. 2009

68007024004-C Updated Section 5.5 and Section 5.7 Sept. 2009

68007024004-D Update Exploded views and Part lists for Front

Housing with Escutcheon Top

MDC1200 and QCII Info

Added UHF1 Info

Added NKP

Nov. 2010

iv Document History

Notes

Table of Contents v

Table of Contents

Copyright ........................................................................................................ i

Safety ............................................................................................................. ii

Document History ........................................................................................ iii

Chapter 1 Model Charts and Test Specifications .............................. 1-1

1.1 Radio Model Information................................................................................................................ 1-1

1.2 Model Chart for UHF2, 435–480 MHz ........................................................................................... 1-2

1.3 Model Chart for VHF, 136–174 MHz ............................................................................................1-3

1.4 UHF2 Specifications ...................................................................................................................... 1-4

1.5 VHF Specifications ........................................................................................................................ 1-5

Chapter 2 Theory Of Operation ........................................................... 2-1

2.1 Introduction .................................................................................................................................... 2-1

2.2 Major Assemblies .......................................................................................................................... 2-1

2.2.1 Receiver............................................................................................................................ 2-1

2.2.1.1 RX Front End ..................................................................................................... 2-2

2.2.1.2 RX Back End ..................................................................................................... 2-3

2.2.1.3 RX Squelch........................................................................................................ 2-3

2.2.2 Transmitter........................................................................................................................ 2-4

2.2.3 Phase Lock Loop Synthesizer .......................................................................................... 2-5

2.2.4 RX Audio Circuit ............................................................................................................... 2-6

2.2.5 TX Audio Circuit................................................................................................................ 2-7

2.2.6 Microcontroller .................................................................................................................. 2-8

2.2.7 Power Supply.................................................................................................................... 2-9

Chapter 3 Test Equipment, Service Aids, and Service Tools........... 3-1

3.1 Test Equipment.............................................................................................................................. 3-1

3.2 Service Aids................................................................................................................................... 3-2

Chapter 4 Performance Checks .......................................................... 4-1

4.1 General .......................................................................................................................................... 4-1

4.2 Power–Up Self Test....................................................................................................................... 4-1

4.3 LCD/LED/Button/Volume Knob Test Mode.................................................................................... 4-1

4.4 LED/Button/Volume Knob Test Mode (Non Keypad Models) ........................................................ 4-3

Chapter 5 Radio Programming and Tuning ....................................... 5-1

5.1 Introduction .................................................................................................................................... 5-1

5.2 CPS Programming Setup .............................................................................................................. 5-1

5.3 Radio-to-Radio Cloning ................................................................................................................. 5-1

5.4 Radio Tuning Setup ....................................................................................................................... 5-2

vi Table of Contents

5.4.1 Initial Test Equipment Control Settings ............................................................................. 5-3

5.5 Transmitter Alignment Options ...................................................................................................... 5-4

5.5.1 Transmit High Power Tuning ............................................................................................ 5-5

5.5.2 Transmit Low Power Tuning ............................................................................................. 5-5

5.5.3 Transmit Modulation Tuning ............................................................................................. 5-6

5.5.3.1 Service Monitor Setting...................................................................................... 5-6

5.5.3.2 Transmit 12.5 kHz Modulation Tuning ............................................................... 5-8

5.5.3.3 Transmit 25 kHz Modulation Tuning .................................................................. 5-9

5.6 Transmit MDC Signaling System Modulation Tuning .................................................................. 5-10

5.6.1 Service Monitor Setting...................................................................................................5-10

5.6.2 Transmit MDC Signaling System 12.5 kHz Modulation Tuning ......................................5-11

5.6.3 Transmit MDC Signaling System 25 kHz Modulation Tuning ......................................... 5-12

5.7 Receiver Tuning........................................................................................................................... 5-12

5.7.1 Service Monitor Setting...................................................................................................5-12

5.7.2 Receive 12.5 kHz-Band Normal Squelch Tuning............................................................ 5-14

5.7.3 Receive 12.5 kHz-Band Tight Squelch Tuning ...............................................................5-14

5.7.4 Receive 25 kHz-Band Normal Squelch Tuning............................................................... 5-15

5.7.5 Receive 25 kHz-Band Tight Squelch Tuning .................................................................. 5-16

5.8 Utilities ......................................................................................................................................... 5-17

5.8.1 Program Serial No. .........................................................................................................5-17

5.9 Front Panel Feature and Button Configuration Mode (Keypad Models Only).............................. 5-18

5.9.1 Introduction ..................................................................................................................... 5-18

5.9.2 Entering Programming Mode .......................................................................................... 5-18

5.9.3 Exiting Programming Mode............................................................................................. 5-18

5.9.4 Accessing Front Panel Programming Mode Parameters................................................ 5-18

5.9.5 Editing Front Panel Programming Mode Parameters ..................................................... 5-19

Chapter 6 Maintenance – CP185 ........................................................ 6-1

6.1 Introduction .................................................................................................................................... 6-1

6.2 Preventive Maintenance ................................................................................................................ 6-1

6.2.1 Inspection.......................................................................................................................... 6-1

6.2.2 Cleaning Procedures ........................................................................................................6-1

6.3 Safe Handling of CMOS and LDMOS Devices .............................................................................. 6-2

6.4 Disassembling and Reassembling the Radio – General................................................................ 6-3

6.4.1 Radio Disassembly – Detailed .......................................................................................... 6-4

6.4.1.1 Front Housing From Chassis Disassembly........................................................ 6-4

6.4.1.2 Chassis Assembly Disassembly ........................................................................ 6-7

6.4.1.3 Front Circuit Board, Display Module and Keypad Disassembly......................... 6-8

6.4.1.4 Speaker Disassembly ........................................................................................ 6-9

6.4.2 Radio Reassembly – Detailed......................................................................................... 6-11

6.4.2.1 Speaker Reassembly....................................................................................... 6-11

6.4.2.2 Front Circuit Board, Display Module and Keypad Reassembly ....................... 6-11

6.4.2.3 Chassis Assembly Reassembly....................................................................... 6-12

6.4.2.4 Chassis and Front Housing Reassembly......................................................... 6-14

6.5 Torque List ...................................................................................................................................6-14

6.6 Mechanical View and Parts List ................................................................................................... 6-15

6.6.1 CP185 View and Parts List ............................................................................................. 6-15

Chapter 7 Maintenance – CP185 ......................................................... 7-1

7.1 Introduction .................................................................................................................................... 7-1

7.2 Preventive Maintenance ................................................................................................................ 7-1

Table of Contents vii

7.2.1 Inspection ......................................................................................................................... 7-1

7.2.2 Cleaning Procedures ........................................................................................................7-1

7.3 Safe Handling of CMOS and LDMOS Devices.............................................................................. 7-2

7.4 Repair Procedures and Techniques – General ............................................................................. 7-3

7.5 Disassembling and Reassembling the Radio ................................................................................ 7-6

7.5.1 Radio Disassembly – Detailed.......................................................................................... 7-7

7.5.1.1 Front Housing From Chassis Disassembly........................................................ 7-7

7.5.1.2 Chassis Assembly Disassembly ...................................................................... 7-10

7.5.1.3 Front Circuit Board and Poron Pad Disassembly ............................................ 7-12

7.5.1.4 Speaker Disassembly ...................................................................................... 7-12

7.5.2 Radio Reassembly – Detailed ........................................................................................ 7-13

7.5.2.1 Speaker Reassembly....................................................................................... 7-13

7.5.2.2 Front Circuit Board and Poron Pad Reassembly............................................. 7-14

7.5.2.3 Chassis Assembly Reassembly....................................................................... 7-15

7.5.2.4 Chassis and Front Housing Reassembly......................................................... 7-17

7.6 Torque List................................................................................................................................... 7-17

7.7 Mechanical View and Parts List................................................................................................... 7-18

7.7.1 CP185 (Non Keypad with Channel Knob) Exploded View and Parts List....................... 7-18

Chapter 8 Troubleshooting Tables ..................................................... 8-1

8.1 Error Codes ................................................................................................................................... 8-1

8.2 Troubleshooting Table for Receiver............................................................................................... 8-2

8.3 Troubleshooting Table for Transmitter........................................................................................... 8-3

Appendix A Accessories ........................................................................A-1

Appendix B Warranty, Service Support, and Replacement Parts .......B-1

B.1 Scope of Manual............................................................................................................................B-1

B.2 Warranty ........................................................................................................................................B-1

B.2.1 Warranty Period and Return Instructions..........................................................................B-1

B.2.2 After Warranty Period .......................................................................................................B-1

B.2.3 Piece Parts .......................................................................................................................B-1

Appendix C Repair Procedures and Techniques – General ................C-1

Glossary of Terms..................................................................................... G-1

viii List of Figures

List of Figures

Figure 2-1. Receiver Block Diagram ................................................................................................... 2-1

Figure 2-2. Transmitter Block Diagram ............................................................................................... 2-4

Figure 2-3. PLL Synthesizer Block Diagram ....................................................................................... 2-5

Figure 2-4. RX Audio Block Diagram .................................................................................................. 2-6

Figure 2-5. TX Audio Block Diagram (UHF1 and UHF2) .................................................................... 2-7

Figure 2-6. TX Audio Block Diagram (VHF)........................................................................................2-7

Figure 3-1. Programming/Test Cable (PMDN4077_R) ....................................................................... 3-3

Figure 3-2. Cloning Cable (PMDN4076_R) ........................................................................................ 3-3

Figure 3-3. Wiring of the Connectors .................................................................................................. 3-3

Figure 4-1. LCD Indication .................................................................................................................. 4-1

Figure 5-1. CPS Programming Setup ................................................................................................. 5-1

Figure 5-2. Radio Tuning Setup.......................................................................................................... 5-3

Figure 5-3. Tx High Power Window (High Power) .............................................................................. 5-5

Figure 5-4. Tx Low Power Window (Low Power)................................................................................ 5-6

Figure 5-5. Tx Modulation 12.5 kHz Window ...................................................................................... 5-8

Figure 5-6. Tx Modulation 25 kHz Window ......................................................................................... 5-9

Figure 5-7. Tx MDC Signaling System Modulation 12.5 kHz Window .............................................. 5-11

Figure 5-8. Tx MDC Signaling System Modulation 25 kHz Window ................................................. 5-12

Figure 5-9. Rx 12.5 kHz-band Normal Squelch Tuning Window ...................................................... 5-14

Figure 5-10. Rx 12.5 kHz-band Tight Squelch Tuning Window .......................................................... 5-15

Figure 5-11. Rx 25 kHz-band Normal Squelch Tuning Window ......................................................... 5-16

Figure 5-12. Rx 25 kHz-band Tight Squelch Tuning Window ............................................................. 5-17

Figure 5-13. Program Radio Serial No. Window................................................................................. 5-17

Figure 6-1. Limited Keypad With Channel Knob Model ...................................................................... 6-3

Figure 6-2. Battery and Antenna Removal..........................................................................................6-4

Figure 6-3. Knobs Removal ................................................................................................................ 6-5

Figure 6-4. Chassis Removal.............................................................................................................. 6-5

Figure 6-5. Speaker Wire and Flexible Cable Connection.................................................................. 6-6

Figure 6-6. Speaker Wire Removal..................................................................................................... 6-6

Figure 6-7. Unlatch the Flexible Cable................................................................................................ 6-7

Figure 6-8. Sub-Circuit Board and Accessory Bracket Removal ........................................................ 6-7

Figure 6-9. Main Circuit Board, O-ring and Battery Contact Seal Removal........................................ 6-8

Figure 6-10. Front Circuit Board Removal ............................................................................................ 6-8

Figure 6-11. LCD and Keypad Removal ............................................................................................... 6-9

Figure 6-12. Speaker Removal ........................................................................................................... 6-10

Figure 6-13. Speaker Reassembly .....................................................................................................6-11

Figure 6-14. LCD and Keypad Reassembly ....................................................................................... 6-11

Figure 6-15. Front Circuit Board Reassembly..................................................................................... 6-12

Figure 6-16. Main Circuit Board, O-ring and Battery Contact Seal Reassembly ................................ 6-13

Figure 6-17. Sub Circuit Board and Accessory Bracket Reassembly................................................. 6-13

Figure 6-18. Chassis Assembly and Front Housing Assembly Reassembly ...................................... 6-14

Figure 6-19. CP185 Exploded View.................................................................................................... 6-15

Figure 6-20. “20” Marking on Front Housing.......................................................................................6-17

Figure 7-1. Non Keypad With Channel Knob Model ........................................................................... 7-6

Figure 7-2. Battery and Antenna Removal..........................................................................................7-7

Figure 7-3. Knobs Removal ................................................................................................................ 7-8

Figure 7-4. Chassis Removal.............................................................................................................. 7-8

Figure 7-5. Speaker Wire and Flexible Cable Connection.................................................................. 7-9

Figure 7-6. Speaker Wire Removal..................................................................................................... 7-9

Figure 7-7. Unlatch the Flexible Cable.............................................................................................. 7-10

List of Figures ix

Figure 7-8. Sub-Circuit Board and Accessory Bracket Removal ...................................................... 7-10

Figure 7-9. Main Circuit Board, Finger Strips, O-ring and Battery Contact Seal Removal (UHF1) .. 7-11

Figure 7-10. Main Circuit Board, Finger Strips, O-ring and Battery Contact Seal Removal (UHF2) .. 7-11

Figure 7-11. Front Circuit Board Removal .......................................................................................... 7-12

Figure 7-12. Poron Pad Removal ....................................................................................................... 7-12

Figure 7-13. Speaker Removal........................................................................................................... 7-13

Figure 7-14. Speaker Reassembly ..................................................................................................... 7-13

Figure 7-15. Poron Pod Reassembly.................................................................................................. 7-14

Figure 7-16. Front Circuit Board Reassembly .................................................................................... 7-14

Figure 7-17. Main Circuit Board, Finger Strips, O-ring and Battery Contact Seal Reassembly

(UHF1)............................................................................................................................. 7-15

Figure 7-19. Sub Circuit Board and Accessory Bracket Reassembly................................................. 7-16

Figure 7-18. Main Circuit Board, Finger Strips, O-ring and Battery Contact Seal Reassembly

(UHF2)............................................................................................................................. 7-16

Figure 7-20. Chassis Assembly and Front Housing Assembly Reassembly ...................................... 7-17

Figure 7-21. CP185 (Non Keypad) Radio Exploded View .................................................................. 7-18

Figure 7-22. “20” Marking on Front Housing.......................................................................................7-20

x List of Tables

List of Tables

Table 1-1. Radio Model Number (Example:AAH03RDF8AA7AN)..................................................... 1-1

Table 3-1. Recommended Test Equipment ....................................................................................... 3-1

Table 3-2. Service Aids...................................................................................................................... 3-2

Table 4-1. Radio Operation in Test Mode .........................................................................................4-2

Table 4-2. Radio Operation in Test Mode – Non Keypad Models ..................................................... 4-3

Table 5-1. Initial Equipment Control Settings ....................................................................................5-3

Table 5-2. Transmit High/Low Power Level....................................................................................... 5-4

Table 5-3. Transmit Modulation Tuning ............................................................................................. 5-6

Table 5-4. Transmit MDC Signaling System Modulation Tuning ..................................................... 5-10

Table 5-5. Receiver Squelch Tuning ...............................................................................................5-12

Table 5-6. Front Panel Programming Mode Parameters: Non-MDC1200 & Non-QCII Models....... 5-19

Table 5-7. Front Panel Programming Mode Parameters: MDC1200 & QCII Models ...................... 5-21

Table 6-1. Torque Chart .................................................................................................................. 6-14

Table 7-1. Lead Free Solder Wire Part Number List ......................................................................... 7-3

Table 7-2. Lead Free Solder Paste Part Number List........................................................................ 7-3

Table 7-3. Torque Chart .................................................................................................................. 7-17

Table 7-4. Parts List (Non Keypad with Channel Knob) .................................................................. 7-19

Table 8-1. Error Code Display ........................................................................................................... 8-1

Table 8-2. Receiver Troubleshooting Table....................................................................................... 8-2

Table 8-3. Transmitter Troubleshooting Table................................................................................... 8-3

Table C-1. Lead Free Solder Wire Part Number List ........................................................................ C-1

Table C-2. Lead Free Solder Paste Part Number List....................................................................... C-1

Related Publications

NAG

CP185 Series Radios User Guide (English, French Canadian) ........................6878080A01

CP185 Series Radios Quick Reference Card (English, French Canadian)..... 68007024011

CP185 Series Basic Service Manual............................................................... 68007024004

Notations Used in This Manual xi

Notations Used in This Manual

Throughout the text in this publication, you will notice the use of the following notations. These notations

are used to emphasize that safety hazards exist, and due care must be taken and observed.

Note:

An operational procedure, practice, or condition that isessential to emphasize.

CAUTION indicates a potentially hazardous situation which, if not avoided,

might result in equipment damage.

xii Summary of Bands Available

Summary of Bands Available

Table below lists all the bands available in this manual. For details, please refer to the Model Charts section.

Frequency Band Bandwidth Power Level

UHF1 403 – 447 MHz 2W or 4W

UHF2 435 – 480 MHz 2W or 4W

VHF 136 – 174 MHz 2W or 5W

Chapter 1 Model Charts and Test Specifications

1.1 Radio Model Information

The model number and serial number are located on a label attached to the back of your radio. You

can determine the RF output power, frequency band, protocols, and physical packages. The example

below shows one portable radio model number and its specific characteristics.

Table 1-1. Radio Model Number (Example:AAH03RDF8AA7AN)

Regional

Prefix

Type of

Unit

Model

Series

Freq. Band

Power

Level

Physical

Packages

Channel

Spacing

Protocol

Feature

Level

Version

Letter

Unique

Variation

AA H 03 R

UHF

(435 – 480 MHz)

K

VHF

(136 – 174 MHz)

D

4 W

E

5 W

F

Limited

Keypad with

Channel

Knob

8

12.5/25k

AA

Conventional

AB

Conventional

with

MDC1200/

QCII

7

No

Front Panel

Prog.

with

Scrambling

AN

AA = NAG

H = Portable

03 = CP Family Model Series

N = Standard Package

1-2 Model Charts and Test Specifications: Model Chart for UHF2, 435–480 MHz

1.2 Model Chart for UHF2, 435–480 MHz

CP185, UHF2, 435 – 480 MHz

Model escription

AAH03RDC8AB7AN CP185 435 – 480M 4W 12.5/25K 16C NKP

AAH03RDC4AB7AN CP185 435 – 480M 4W 12.5K 16C NKP

AAH03RDF8AA7AN CP185 435 – 480M 4W 12.5/25K 16C

AAH03RDF8AB7AN CP185 435 – 480M 4W 12.5/25K 16C LKP

AAH03RDF4AB7AN CP185 435 – 480M 4W 12.5K 16C LKP

Item Description

X PMUE3139_ 435 – 480M 4W 12.5/25K 16C

X PMUE3743_ 435 – 480M 4W 12.5/25K 16C NKP

X PMUE3745_ 435 – 480M 4W 12.5K 16C NKP

X PMUE3744_ 435 – 480M 4W 12.5/25K 16C LKP

X PMUE3746_ 435 – 480M 4W 12.5K 16C LKP

X PMDE4023_R 435 – 480M 4W PCB – PMUE3139_AN

X PMDE4058_R 435 – 480M 4W PCB – PMUE3743_AN

X PMDE4056_R 435 – 480M 4W PCB – PMUE3745_AN

X PMDE4057_R 435 – 480M 4W PCB – PMUE3744_AN

X PMDE4055_R 435 – 480M 4W PCB – PMUE3746_AN

X X X PMDN4131_R Front Circuit Board, LKP

X X PMDN4179_R Front Circuit Board, NKP

X X X X X PMDN4128_R Sub Circuit Board, w Channel

X = Indicates compatibility with model(s)

Model Charts and Test Specifications: Model Chart for VHF, 136–174 MHz 1-3

1.3 Model Chart for VHF, 136–174 MHz

CP185, VHF, 136 – 174 MHz

Model Description

AAH03KEC8AB7AN CP185 136 – 174M 5W 12.5/25K 16C NKP

AAH03KEC4AB7AN CP185 136 – 174M 5W 12.5K 16C NKP

AAH03KEF8AA7AN CP185 136 – 174M 5W 12.5/25K 16C

AAH03KEF8AB7AN CP185 136 – 174M 5W 12.5/25K 16C LKP

AAH03KEF4AB7AN CP185 136 – 174M 5W 12.5K 16C LKP

Item Description

X PMUD2444_ 136 – 174M 5W 12.5/25K 16CH

X PMUD2933_ 136 – 174M 5W 12.5/25K 16C NKP

X PMUD2935_ 136 – 174M 5W 12.5K 16C NKP

X PMUD2934_ 136 – 174M 5W 12.5/25K 16C LKP

X PMUD2936_ 136 – 174M 5W 12.5K 16C LKP

X PMDD4020_R 136 –174M 5W PCB – PMUD2444_AN

X PMDD4034_R 136 – 174M 5W PCB – PMUD2933_AN

X PMDD4032_R 136 – 174M 5W PCB – PMUD2935_AN

X PMDD4033_R 136 – 174M 5W PCB – PMUD2934_AN

X PMDD4031_R 136 – 174M 5W PCB – PMUD2936_AN

X X X PMDN4131_R Front Circuit Board, LKP

X X PMDN4179_R Front Circuit Board, NKP

X X X X X PMDN4128_R Sub Circuit Board, w Channel

X = Indicates compatibility with model(s)

1-4 Model Charts and Test Specifications: UHF2 Specifications

1.4 UHF2 Specifications

General

Self-Quieter Frequencies

Transmitter

Receiver

All specifications are subject to change without notice.

UHF2

Frequency: 435 – 480 MHz

Channel Capacity: 16 Channels

Power Supply: 7.5 Volts ±20%

Dimensions:

(H x W x D)

with

High Capacity Li-Ion

NiMH Std

Li-Ion Std

Batteries:

120 mm x 55 mm x 40.7 mm

120mm x 55mm x 36.5mm

120mm x 55mm x 35.5mm

Weight:

16 Channel Model

Batteries:

High Capacity Li-Ion

NiMH Std

Li-Ion Std

342.0g

394.5g

335.0g

Average Battery Life

@ (5-5-90 Duty

Cycle):

High Capacity Li-Ion

NiMH Std

Li-Ion Std

Capacity

(mAh)

2150

1300

1500

4 W

12 Hrs.

8 Hrs.

2 W

14 Hrs.

10 Hrs.

UHF2

446.44

446.445

455.895

456.01

456.015

456.125

458.195

460

467.785

467.9

468.01

468.125

468.24

470

479.9

UHF2

RF Output

NiMH @ 7.5 V:

Low

2 W

High

4 W

Frequency: 435 – 480 MHz

Channel Spacing: 12.5/25 kHz

Freq. Stability:

(-30°C to +60°C)

0.00025%

Spurs/Harmonics: -36 dBm < 1 GHz

-30 dBm > 1 GHz

Audio Response:

(from 6 dB/oct.

Pre-emphasis, 300 to

3000 Hz)

+1, -3 dB

Audio Distortion:

@ 1000 Hz, 60%

Rated Max. Dev.

<5%

FM Noise: <-40 dB

UHF2

12.5 kHz

UHF2

25 kHz

Frequency: 435 – 480 MHz

Sensitivity

12 dB EIA SINAD:

0.25 μV (typical)

Adjacent Channel

Selectivity:

-65 dB -70 dB

Intermodulation: -70 dB

Freq. Stability

(-30°C to +60°C):

0.00025%

Spur Rejection: -70 dB

Image and 1/2 I-F

Rejection:

-70 dB

Audio Output

@ <5% Distortion:

500 mW

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Motorola CP185 Series Basic Service Manual

Motorola CP185 Series Basic Service Manual

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