LBI-39014B

Maintenance Manual

MDX



UHF MOBILE RADIO

ERICSSONZ

TABLE OF CONTENTS

RF BOARD . . . . . . . . . . . . . . . . . . . . . . . LBI-39017

SYSTEM BOARD . . . . . . . . . . . . . . . . . . . LBI-38842

AUDIO/LOGIC BOARD . . . . . . . . . . . . . . . . LBI-39016

AUDIO AMPLIFIER BOARD . . . . . . . . . . . . . LBI-38844

FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . LBI-38850

LBI-38974

PA BOARD . . . . . . . . . . . . . . . . . . . . . . . LBI-39051

SERVICE SECTION . . . . . . . . . . . . . . . . . . LBI-39018

Ericsson Inc.

Private Radio Systems

Mountain View Road

Lynchburg, Virginia 24502

1-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A.

LBI-39014B

TABLE OF CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

POWER AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AUDIO/LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ACCESSORIES AND OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PC PROGRAMMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PC PROGRAMMED OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Carrier Control Timer (CCT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Channel Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Squelch Tail Elimination (STE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page

2

3

3

3

3

3

3

3

3

3

3

3

3

3

3

4

NOTICE!

This manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc.

NOTICE!

Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier. Any repairs, alterations or substitution of recommended parts made by the user to this equipment not approved by the manufacturer could void the user’s authority to operate the equipment in addition to the manufacturer’s warranty.

NOTICE!

The software contained in this device is copyrighted by Ericsson Inc. Unpublished rights are reserved under the copyright laws of the United States.

This manual is published by Ericsson Inc., without any warranty. Improvements and changes to this manual necessitated by typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by Ericsson Inc., at any time and without notice. Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of Ericsson Inc.

TABLE OF CONTENTS

Page

HARDWARE AND HARDWARE OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

CABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

NOISE SUPPRESSION KIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

POWER CABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

EXTERNAL SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

EXTERNAL ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

RADIO OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

USER INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

PUBLIC ADDRESS OPTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

TYPE 99 OPTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ASSEMBLY DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

INTERCONNECTION DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

SPECIFICATIONS*

GENERAL

Regulatory Approval

403 to 440 MHz

440 to 470 MHz

470 to 512 MHz

Operating Voltage

Battery Drain

Receiver (13.8 Vdc)

Off

Squelched

Unsquelched

Transmitter (13.8 Vdc)

Channel Spacing

Frequency Stability

Temperature Range

Dimensions (H X W X D)

(Less Accessories)

Height

Width

Depth

Weight

Antenna Impedance

Continued

FCC

AXATR-327-A2

AXATR-327-B2

AXATR-327-C2

13.8 Volts

±

20%

5.3 cm (2.1 inches)

18.2 cm (7.2 inches)

24.0 cm (9.5 inches)

3.0 kg (6.6 pounds)

50 Ohms

DOC

TR-327

TR-327

-------

0.01 Amperes (Maximum)

0.75 Amperes (Maximum)

3.5 Amperes (Maximum at 10 Watts audio, External Speaker)

13.0 Amperes (Maximum at 40 Watts RF)

25/30 kHz (12.5 or 10 kHz resolution)

±

2.5 PPM (

±

0.00025%)

-30°C to 60°C (-22°F to +140°F)

Copyright © March 1994, Ericsson GE Mobile Communications Inc.

1

LBI-39014B

TRANSMITTER

Frequency Range

Low Split Radio

Mid Split Radio

High Split Radio

Output Power

Audio Sensitivity

Spurious and Harmonics

Audio Distortion

Modulation Limiting

FM Hum and Noise

Audio Frequency Response

RECEIVER

Frequency Range

Low Split Radio

Mid Split Radio

High Split Radio

Frequency Separation

Acceptable Frequency Displacement

Sensitivity (12 dB SINAD)

Spurious Rejection

Image Rejection

Adjacent Channel Selectivity

Intermodulation Distortion

Audio Frequency Response

Audio Output

Audio Distortion

Hum and Noise

Continued

SPECIFICATIONS*

403 to 440 MHz

440 to 470 MHz

470 to 512 MHz

40 Watts (Intermittent duty cycle; EIA 20%)

110 mV RMS (typical)

Less than -16 dBm

5% (maximum)

±

5 kHz (maximum)

-45 dB (maximum)

Within +1, -3 dB of a 6 dB/octave pre-emphasis curve from

300-3000 Hz

403 to 440 MHz

440 to 470 MHz

470 to 512 MHz

20 MHz (across band without tuning)

±

2.5 kHz (minimum)

-116 dBm (maximum)

-80 dB (maximum)

-70 dB (maximum)

-80 dB (maximum at

±

25 kHz)

-75 dB (maximum)

Within +1/-3 dB from 500 Hz to 2500 Hz, 6 dB/octave attenuation from 300-500 Hz, 12 dB/octave attenuation from

2500-3000 Hz (per EIA/TIA-603)

10 Watts (External Speaker); 4 Watts (Internal Speaker)

7.5 Watts (External Speaker with remote mount kit)

5% (maximum at 1 kHz)

-45 dB (maximum)

Continued

ENVIRONMENTAL

STANDARD

U.S. Forest Service

Vibration:

EIA

Vibration

Shock:

High Temperature

Low Temperature

Low Pressure

Solar Radiation

Temperature Shock

Vibration

Mechanical Shock

Humidity

Salt Fog

Blowing Dust

Driven Rain

Mil-810C

501.1/Proc 2

502.1/Proc 2

500.1/Proc 1

505.1/Proc 1

503.1/Proc 2

514.2/C8, P1

516.2/Proc 1

507.1

509.1/Proc 1

510.1/Proc 1

506.1/Proc 1

METHODS PROCEDURES

Mil-810D

501.2/Proc 2

502.2/Proc 2

500.2/Proc 1

505.2/Proc 1

503.2/Proc 1

514.3/Proc 8

516.3/Proc 1-6

507.2

509.2/Proc 1

510.2/Proc 1

506.2/Proc 1

Mil-810E

501.3/Proc 2

502.3/Proc 2

500.3/Proc 1, 2

505.3/Proc 1

503.3/Proc 1

514.4/C8, P1

516.4/Proc 1-6

507.3

509.3/Proc 1

510.3/Proc 1

506.3/Proc 1

Methods 7.15.1 and 8.11.1

RS152B Method 14.3 and RS206C Method 24.2

RS152B Method 15 and RS204C Method 25

* These specifications are intended primarily for use by a service technician. Refer to the appropriate Specification Sheet for

complete specifications.

2

DESCRIPTION

The UHF MDX



Mobile Radio is a synthesized, wide band radio that uses integrated circuits and microcomputer technology to provide high performance in conventional communications systems. The UHF MDX Mobile radio provides

40 Watts of RF power output in the 403-440, 440-470 or 470-

512 MHz bands.

This radio operates in the conventional mode and can operate with tone Channel Guard, Digital Channel Guard, or carrier squelch, depending on personality programming. The Channel

Guard range is 67.0 to 210.7 Hz. Squelch Tail Elimination

(STE) is used with Channel Guard to eliminate squelch tails at the receiving radio by phase shifting the transmitted Channel

Guard tone when the Push-To-Talk (PTT) switch is released.

All radio functions are stored in a programmable Electrically Erasable PROM (EEPROM).

•

Serial Programming Interface Module

•

Programming Cable (19B801417P10)

•

MDX Series Programming Software

TQ3370

TQ3372

TQ3346

With the interface equipment and software, the computer can be used to program (or re-program) customer system frequencies, Channel Guard tones and options. Selection of options is done during radio initialization using the PC programmer.

The UHF MDX Mobile Radio assembly contains the following circuit boards and assemblies:

•

Power Amplifier

•

RF Board

•

System Board

•

Audio/Logic Board

•

Audio Amplifier Board

•

Front Cap Assembly

19D904792

188D5062

19D901891

19D903963

19D904025

19D904151

The circuit boards are all mounted on a main casting to provide easy access for servicing. Interconnect plugs are used to connect the boards to eliminate pinched wires and other wiring problems.

RF BOARD

The RF Board includes the programmable frequency synthesizer, transmitter exciter, receiver front-end and Intermediate Frequency (IF) circuitry.

Synthesizer

The synthesizer circuit generates all transmit and receive

RF frequencies. The synthesizer frequency is controlled by the microprocessor located on the Audio/Logic Board. Frequency stability is maintained by a temperature compensated reference oscillator module. Transmit audio is processed on the

Audio/Logic Board and applied to the synthesizer to modulate the Voltage Controlled Oscillator (VCO) and the Temperature

Controlled Xtal (crystal) Oscillator (TCXO). The buffered

VCO output drives both the transmitter exciter and the receiver mixer.

Transmitter

The transmitter consists of a fixed-tuned exciter module,

PA module and a power control circuit. The PA module provides RF output to drive the antenna. The power control circuit controls the PA module to maintain constant output power across the band. The RF output level is internally adjustable for rated power. A thermistor control circuit protects the PA from overheating by linearly reducing the power output level with increasing temperature.

Receiver

The dual conversion receiver circuit consists of a front-end section, 45 MHz first IF, a 455 kHz second IF and Frequency

Modulation (FM) detector. All audio processing and squelch functions are accomplished on the Audio/Logic Board.

POWER AMPLIFIER BOARD

The PA Board amplifies the RF board output, then connects it back to the RF board where it is coupled through a PIN diode antenna switch, a low-pass filter and a directional coupler to provide 40 watts power output at the antenna connector.

AUDIO/LOGIC BOARD

The Audio/Logic Board provides all audio and digital processing of the receive and transmit audio for digital processing by the Logic Board. This board also contains audio filtering, conventional analog tone processing and the receiver squelch.

The Audio/Logic Board controls the operation of the radio and digitally processes the receiver and transmit audio. The board contains a microprocessor and associated memory circuits including an Electrically Programmable Read Only Memory

(EPROM) for controlling the processor and a programmable

"personality" memory, an EEPROM to store customer frequencies, tones and options. The microprocessor provides control data to the Audio Signal Processor (ASP) conventional tone generation and detection, frequency data for the synthe-

LBI-39014B sizer and sends and receives data to/from another microprocessor on the Display Board for the alphanumeric LED display.

PC PROGRAMMED OPTIONS

FRONT CAP ASSEMBLY

The Front Cap Assembly contains the Audio Amplifier

Board. This board provides audio compression for the received audio in the discriminator internal/external speaker audio paths. A 10-watt power amplifier is provided on the board to drive a 4-ohm external speaker or the 8-ohm internal speaker.

Carrier Control Timer (CCT)

The Carrier Control Timer turns off the transmitter after the microphone PTT switch has been keyed for a pre-programmed time period. A pulsing alert tone warns the operator to unkey and then key again the PTT to continue the transmission. The timer can be programmed, using the PC programmer. Any time period between 0 seconds and 4.1

minutes can be programmed in 10 second increments. The timer can be enabled or disabled for each channel.

SYSTEM BOARD

The system board controls the main input power to the radio. The IGNITION SENSE input lead provides the necessary signals to the MOSFET switching circuit. The board also interfaces all option connections from the internal boards in the radio with the optional items outside of the radio. All external options for the radio, interconnect to the

System Board through the back of the radio using an optional cable.

Channel Guard

Channel Guard provides a means of restricting calls to specified radios through the use of a Continuous Tone Coded

Squelch System (CTCSS), or a Continuous Digital Coded

Squelch System (CDCSS). Tone frequencies range from

67.0 Hz to 210.7 Hz in 0.1 Hz steps. There are 83 standard

PC programmable digital codes. The Channel Guard tone frequencies and codes are software programmable. Both tone frequencies and digital codes may be used. These codes and frequencies are listed in Table 1- Channel Guard Tone

Frequencies and Table 2- Digital Channel Guard Codes.

ACCESSORIES AND OPTIONS

PC PROGRAMMER OPTIONS

The radio is programmed using an IBM compatible Personal Computer (PC) equipped with an RS-232 serial interface unit and the cable between the PC and the unit. An auxiliary power supply for the unit is also included but is not needed to program the radio.

Option TQ3372 provides the MDX UHF radio programming cable between the PC interface unit and the radio microphone jack.

NOTE

To reverse the polarity of the digital Channel Guard codes, in the PC programmer, type I (inverted) before the code number, i.e. I023.)

Table 1 - Standard Channel Guard Tone Frequencies (Hz)

67.0

71.9

74.4

77.0

79.7

82.5

85.4

88.5

91.5

94.8

97.4

100.0

103.5

107.2

110.9

114.8

118.8

123.0

127.3

131.8

136.5

141.3

146.2

151.4

156.7

162.2

167.9

173.8

179.9

186.2

192.8

203.5

210.7

1. Do not use 179.9 Hz or 118.8 Hz in areas served by 60 Hz power distribution systems (or 100.0 Hz or 151.4 Hz in areas supplied with 50Hz power).

Hum modulation of co-channel stations may "false" Channel Guard decoders.

2. Do not use adjacent Channel Guard tone frequencies in systems employing multiple Channel Guard tones. Avoid same-areas co-channel use of adjacent

Channel Guard tones whenever possible. As stated in EIA Standard RS-220, there is a possibility of decoder falsing.

3. To minimize receiver turn-on time delay, especially in system using Channel Guard repeaters or receiver voting, choose the highest usable Channel

Guard tone frequency. Do not use tones below 100 Hz when it is necessary to meet the receiver response time requirements of EIA Standard RS-220.

3

LBI-39014B

Table 2 - Digital Channel Guard Codes

PRIMARY

CODE

EQUIVALENT

CODE

PRIMARY

CODE

EQUIVALENT

CODE

PRIMARY

CODE

EQUIVALENT

CODE

340 766

566

374 643

355

375 707

520 771

405 675

301

603 717 746

470 701

640

360 721

327 615

534 674

060 737

173

572 702

605 634 714

273

333

366 415

233 660

517 741

416 553

354

057

142 270

135 610

350 475 750

104 557

267 342

176 417

370 554

054

065

071

072

073

074

114

115

116

023

025

026

031

032

043

047

051

162

165

172

174

205

223

226

243

244

245

125

131

132

134

143

152

155

156

432

445

464

465

466

503

506

516

532

546

606

364

365

371

411

412

413

423

431

612

624

627

631

311

315

331

343

346

351

251

261

263

265

271

306

NOTE:

Primary codes in bold are unique Ericsson codes.

Squelch Tail Elimination (STE)

236 704 742

227 567

213 736

171 426

427 510 762

147 303 761

330 456 561

321 673

372 507

324 570

616 635 724

353 435

130 641

107

217 453 530

117 756

127 441 711

133 620

234 563 621 713

262 316 730

276 326

222 457 575

237 642 772

056 656

144 666

157 322

224 313 574

067 720

161 345

317 614 751

153 630

254 314 706

075 501

037 560

231 504 636 745

STE is used with tone and digital Channel Guard to eliminate squelch tails. The STE burst is transmitted when the microphone PTT switch is released. The receiving radio decodes the burst and mutes the receiver audio for 250 ms.

This mute time allows the transmission to end and to mute the squelch tail. The radio looks for STE on the received signal when the microphone is either on or off-hook.

356

446

452

454

455

462

523

526

252

255

266

274

325

332

723

731

732

734

743

754

036

053

122

145

212

225

246

632

565

654

662

664

703

712

123 657

307 362

163 460 607

363 436 443 444

344 471 715

150 256

136 502

235 611 671

447 473 474 744

164 207

066

312 515 663

076 203

137

535

525

253

536

542 653

661

425

655

652

550 626

433 552

521

467 511 672

524 765

513 545 564

533 551

472 623 725

647 726

562 645

HARDWARE AND HARDWARE

OPTIONS

The location and placement of system hardware options is shown on the MDX Conventional Mobile Radio Interconnection Diagram 188D5198.

CABLE OPTION PMCD7Z

Cable Option PMCD7Z is used to bring all option connections from the system Board through the back of the radio to the outside. This cable is required with all external options.

NOISE SUPPRESSION KIT OPTION PMPD1A

Noise Suppression Kit, Option PMPD1A, consist of filter

19A148539G1 and Installation Manual LBI-31363. This kit is available for installations where excessive alternator or electrical noises, present on the power cable, do not permit the radio to operate properly. Refer to the Interconnect Diagram for the radio and options.

In the conventional mode of operation, the user selects a channel and communicates on that channel in the conventional mode. A system refers to a set of channels and a channel is a transmit/receive radio frequency pair.

The exact operation of any radio depends upon the operating mode, the programming of the radio and the particular radio system. Most features described in these operating instructions can be enabled or disabled through programming.

Both of these important factors must be considered when addressing the following instructions.

POWER CABLE OPTION PMCD9A

The 18-foot Power Cable Option, PMCD9A

(19B801358P17) is available for installations requiring more than the standard 9-foot cable.

USER INTERFACE

Operating controls are located on the radio front panel and microphone.

The Front panel Light Emitting Diode (LED) display provides radio status and communication control information for the operator. The keypad is used for activation of various features and functions.

EXTERNAL SPEAKER OPTION PMZM1T

External Speaker and Cable Option PMZM1T, provides the user a 5-inch waterproof speaker in a LEXAN housing. Option

PMCC9M is an 18-inch, external speaker cable option

PMCC9M (19A149590P8), included in the option PMCD7Z.

A 16-foot cable option PMCD1W (19A149590) is also available.

When using the external speaker, the internal speaker should be disconnected. The internal/external speaker switch option PMPL3D allows use of both speakers (Refer to the Interconnection Diagram).

EXTERNAL ALARM HORN RELAY OPTION

PMSU1C

External Alarm Horn Relay Option PMSU1C

(19A705499P1) can sound the vehicle horn when a call is received. The option connects to Pin 13 of cable option

PMCD7Z (19C851585P14) and is enabled through the front panel switch.

Turning The Radio On/Off

The radio is turned On/Off by pressing the PWR button in the upper left corner of the front panel. To turn the radio OFF press the PWR button again.

SCAN OPERATION

The SCAN function allow monitoring up to 16 receive channels. The scanned channels may be any frequency within the frequency band limits of the radio and may be Channel

Guard protected (tone/digital). All scan functions are retained in memory, even if the 12 Volt battery is disconnected.

Any channel may be scanned with or without a priority level. One channel may be programmed for Priority 1 (P1) and another for Priority 2 (P2) with any or all remaining channels programmed as non-priorities.

RADIO OPERATION

A complete set of operating instructions for the MDX UHF radio are provided in Operator’s Manual LBI-39012. A copy of

LBI-39012 is provided with each radio.

RECEIVER SCAN RATE

The scan rate for the radio will vary depending upon the number of channels programmed into the scan list and whether or not Channel Guard is programmed. When scanning 16 inactive channels, the priority channels are sampled 11 times/second and the non-priority channels 3 times/second. The scan rate will be faster when fewer channels are programmed into can memory.

4

Scan operation will be determined by the following conditions:

•

PRIORITY 1, PRIORITY 2 AND NON-PRIORITY

PROGRAMMED

The Priority 1, Priority 2 and up to 14 remaining channels will be scanned. Once a carrier is detected and if programmed, the correct Channel Guard is decoded, the LED display will indicate that channel. Sampling of the Priority 1 and Priority 2 channels continues while receiving a message. Should a Priority 1 or 2 channel carrier with the correct Channel Guard be detected while a non-priority channel is being received, the applicable indicator, P1 or P2 lights and the channel is switched to the Priority 1 or 2 channel regardless of what is being received on the non-priority channel.

•

NON-PRIORITY PROGRAMMED

Up to 16 non-priority channels may be scanned. Once a carrier is detected or correct Channel Guard is decoded, the digital display will indicate the channel. Scan will stop and remain on the channel until the carrier disappears; after a few seconds scanning resumes. The channels are scanned in descending order.

4.

Press the programmed flex key mapped to scan add/delete to add the channel to the scan list. The S indicator will be shown in the display to indicate that the channel is now in the scan program.

5.

Repeat steps 2 through 5 for each channel, up to 16, to be added to the scan list.

•

PRIORITY 2 (P2)

1.

With scan off, select the desired P2 channel.

2.

Press and hold the programmed flex key mapped to scan add/delete twice. The displayed channel will now become the Priority 2 channel and the P2 indicator will light to indicate that the channel is now in the scan list as priority 2.

NOTE

A previous channel with priority will become a non-priority scan channel when a new priority channel is programmed.

TO PROGRAM SCAN CHANNELS AND

SELECT PRIORITY

The selection of scan channels and priority is front panel programmable using the programmed flex key or the menu mode.

•

The following, details how to add/delete channels using the flex key mapped to scan add/delete. The alternative is to select "SCAN A/D" in the menu mode.

Select the desired channel using the "-" button and add/delete channels using the "+" button.

NON-PRIORITY (S)

NOTE

1.

Confirm that the radio is turned on. If not, press the

POWER switch.

2.

If the SCAN indicator is lit, press and release the

SCAN switch to disable the scan function.

3.

Select the desired channel using the CHANNEL UP and DOWN switch.

•

PRIORITY 1 (P1)

The Priority 1 channel may be added to the scan list by one of three methods by PC programming the radio personality. Normally P1 is added using the front control panel

(Method 1).

•

Method 1: FRONT PROGRAMMABLE

1.

With scan off, select the desired P1 channel.

2.

Press the programmed flex key mapped to scan add/delete three times. The displayed channel will now become the Priority 1 channel and the

P1 indicator will light to indicate that the channel is now in the scan list as priority 1.

•

Method 2: FIXED P1 OPTION

The P1 channel is PC programmed into the radio personality.

•

Method 3: SELECTED CHANNEL OPTION

This option is PC programmed into the radio personality. Each time the scan function is turned on by pushing the SCAN switch, the P1 channel becomes the channel in the display (the SELECTED channel).

LBI-39014B

DELETE SCAN CHANNEL (S, P1, P2)

1.

Confirm that the radio is on. If not, press the power switch.

2.

If SCN indicator is lit, press and release the SCAN switch to disable scan function.

3.

Select the desired channel to be removed from the scan list using the CHANNEL UP or DOWN switches.

4.

Press the programmed flex key mapped to scan add/delete until all scan indicators (S, P1 and P2) are off. This removes the selected channel from the scan list.

5.

Repeat preceding steps 2 through 5 for each channel to be removed from the scan list.

REVIEWING THE SCAN LIST

1.

Confirm that the radio is turned on. If not, press the

POWER switch.

2.

If the SCAN indicator is lit, press and release the

SCAN switch to disable the scan function.

3.

Select each channel (one at a time) using the

CHANNEL UP or DOWN switch and confirm channels included on the scan list. The scan indicators (S, P1, P2) will light for each channel programmed.

USING THE RADIO WITH SCAN

THE SELECTED CHANNEL

The SELECTED channel is the channel in the display when scan is turned on by pushing the SCAN switch. When a signal is not being received, the radio reverts to this channel for transmitting. When a signal is being received, the radio reverts to this channel for transmitting. When a signal is being received, the radio can be PC programmed to either revert to the SELECTED channel or remain on the received channel.

The SELECTED channel does not necessarily have to be a channel in the scan list. The SELECTED channel will be temporarily entered into the scan list and scanned until the

SELECTED channel is changed.

When scan is turned off by pushing the SCAN switch, the radio will return to the SELECTED channel.

DISPLAY

Channel Indicator

While no signal is being received, the channel indicator will always show the SELECTED channel. When an active channel is received, the channel indicator will show the received channel.

SCN Indicator

When the SCAN button is pushed, the radio will light the SCAN indicator and begin scanning. The SCN indicator will flash when the microphone is placed off-hook to show the radio is no longer scanning (only if the radio is PC programmed not to scan off-hook).

TRANSMITTING WHILE IN SCAN

Transmitter operation in scan is determined by the PC programming of the radio personality. A flow chart is provided in this section to summarize the scan operation the following description.

Off-Hook Scan Not Enabled (default):

With off-hook scan not enabled (normal default condition), all scanning will stop when the microphone is placed off-hook. The SCN indicator will flash to show all scanning has stopped. If a signal is not being received when the microphone is placed off-hook, the radio will transmit on the

SELECTED channel. If a signal is being received when the microphone is placed off-hook, the radio can be PC programmed (using the "scan transmit option" to either stay on the receive channel or revert to the SELECTED channel.

When the microphone is placed back on-hook, the radio will immediately start scanning, even if the received channel was still active.

Off Hook Scan Enabled:

With off-hook scan enabled, moving the microphone off

-hook will not affect scan operation. The radio will continue scanning. If a signal is not being received, the radio will transmit on the SELECT channel. If a signal is being received, the radio can be PC programmed (using the "scan transmit channel" option) to either stay on the receive channel or revert to the SELECTED channel when the microphone PTT is keyed.

5

LBI-39014B

MONITOR (CLR) SWITCH OPERATION IN

SCAN

The CLR switch does not operate while scanning inactive channels. When a channel becomes active, the CLR switch operates only during the scan hang time after the channel activity disappears.

CHANNEL CHANGES IN SCAN

Pushing the channel switches (UP or DOWN) while scan is turned on will change the SELECTED channel assignment. If a signal is being received and the channel switches are pushed, the radio will revert to the new SELECTED channel assignment. The channel indicator display will show the new assignment. After 2 seconds, if no activity appears on the new SELECTED channel, scanning will resume. If the SELECTED Channel is changed to a channel not in the scan list, the new channel will be temporarily added to the scan list until the SELECTED channel is changed again.

Temporary Channel Deletions:

The SCAN function must be turned off to make any permanent changes (additions, deletions, reprioritizations) to the scan list. While in scan, temporary channel deletions may be made to the scan list. The original scan list will be back in effect by either turning scan off (by pushing the

SCAN switch) or by turning the radio power off and back on.

When the radio stops scanning on an active channel, the channel may be temporarily deleted by pressing the programmed flex key mapped to scan add/delete. The radio will immediately resume scanning while skipping over the temporarily deleted channel.

Temporary deletions cannot be made until the radio stops on an active channel. P1 and P2 channels cannot be temporarily deleted.

PC PROGRAMMING SCAN OPTIONS

1.

Scan Hang Time:

A scan hang time is applied after the carrier on an active channel disappears and after releasing the transmitter PTT. The hang time prevents momentary signal fades from resuming scan (which would cause big gaps in the receive audio ) and allows time to respond to a received call. The hang time also prevents the radio from immediately leaving the channel and resuming scan when the PTT is released to allow time for a return call. The scan hang time is normally 2 seconds in length and PC programmable from 0.3 to 5 seconds on 0.1 seconds steps. If no other channel activity occurs during this time, scanning will then resume. The priority channels are still being sampled during the hang time.

2.

Hang Time After PTT Release:

YES (default): If off-hook scan is enabled, after the

PTT is released, the radio will not stay on channel but will immediately resume scanning. The scan hang time will still be applied after a received carrier disappears.

NO: If off-hook scan is enabled, when the PTT is released, the radio will not stay on channel but will immediately resume scanning. The scan hang time will still be applied after a received carrier disappears.

3.

Scan For Channel Guard:

YES: The radio will stop scanning only on active channels with the correct Channel Guard. If a scan channel has Channel Guard programmed, the radio will scan only on noise squelch operation for that channel.

NO: The radio will ignore Channel Guard and scan only on noise squelch operation.

4.

Scan Transmit Channel:

SELECTED channel (default): The radio will always revert to SELECTED channel when the microphone PTT is keyed or when the microphone is placed off-hook (if off-hook scan is disabled). If signals not being received, the radio will transmit on the SELECTED channel.

5.

Off-Hook Scan Enable:

NO: (default): The radio will stop scanning and flash the SCN indicator when the microphone is off-hook. See the "scan transmit channel" description above to program where the radio will transmit.

YES: The radio will continue scanning with the microphone off-hook. See the "scan transmit channel" description above to program where the radio will transmit.

6

Figure 1 - Scan Operation Flow Chart

6.

Priority 1 Channel Programming:

•

Method 1 - Front programmable (default)

P1 is added to the scan list using the front control panel.

•

Method 2 - Fixed P1 Option

P1 channel is PC programmed into the radio personality.

•

Method 3 - SELECTED channel option:

The P1 channel follows the SELECTED channel.

Each time the scan function is turned on by pushing the SCAN switch, the P1 channel will then follow any changes in the SELECTED channel assignment when the channel switches are pushed.

DETAILED SCAN OPERATION

The scan operation is controlled by the Audio /Logic Board and provides for scanning any or all of up to 16 channels. The scanned channels may be located anywhere within the frequency band of the radio and can include two priority channels

(P1 and P2).

If desired, all 16 channels can be scanned with or without priority level. When SCAN is enabled, scanning of the selected channels starts immediately. Scan time is approximately 15 to

160 milliseconds per channel, depending upon whether Channel Guard has been programmed for a particular scan channel.

If a carrier is not detected, the scan time is 15 milliseconds. If a carrier is detected and Channel Guard is programmed for the channel, the scan time is 75-175 milliseconds, depending upon how close the Channel Guard tone is to the desired tone. Typical value is less than 175 milliseconds. Priority 1 (P1) and Priority 2 (P2) channels, if present, are not part of the non-priority channel scan list (S1, S2, S3,...) and are treated separately. If there is no activity on any of the scanned channels, then the scan sequence is as shown in the following example.

Example 1: (More than four Non-priority channels, i.e., six channels)

P1-P2-S6-S5-S4-S3-P1-P2-S2-S1-S6-S5-P1-P2-S4-S3-S2-S1-P1-P2-...

Example 2: (Four or less Non-Priority channels, i.e., three channels)

P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-...

Therefore, the scan sequence is: Scan P1 and P2 programmed. Then scan up to four non-priority channels before scanning P1 and P2 again. If more than four (4) non-priority channels exist, then scan will wrap around, continuously scanning four channels of the non-priority list between each P1, P2 scan sequence. If the number of non-priority channels is less than or equal to four, then all non-priority channels will be scanned between each P1, P2 scan.

As an added example, consider channels 1-8 to be scanned channels, with P1 being channel 1 and P2 being channel 8. The scanning order then would be:

Since it takes approximately 15 to 160 milliseconds to scan each channel, then each Priority channel is sampled every 0.09

to 0.96 seconds and the non-priority channels are sampled at least once every 0.12 to 1.28 seconds. If Channel Guard is programmed for a channel, but no carrier is detected, the scan time for that channel is 15 milliseconds.

SCANNING (Stopped On A Valid SCAN Channel):

Once a carrier is detected, the channel display will indicate that channel. If the channel is a non-priority channel and there are no priority channels, then scanning is halted. If only a Priority 2 (P2) channel is present, then it is scanned every 5 seconds if it has Channel Guard programmed and carrier is detected and every second otherwise. If there is only a Priority

1 (P1) channel, then it is sampled every 2.5 seconds if it has

Channel Guard and carrier is detected and every 500 milliseconds otherwise. If there are P1 and P2 Priority channels, the sample rate will vary.

In order to show the various scan conditions, the following conditions are used:

NOTE

The following conditions are shown while listening to a Non-Priority channel. The "ts" is the "hole" or audio blanking time in the signal being heard while the radio is checking the priority channels for activity.

CONDITION 1: P1 and P2 have Channel Guard Programmed a.

No carriers detected on P1 or P2

P1-P1-P2-P1-P1-P2-P1-P1-P2...

tb (time between samples) =500 msec ts (time of sample) =32 msec b.

Carrier on P1 detected/wrong Channel Guard

P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1...

tb=1 second ts=32 msec for P2

75-175 msec for P2

LBI-39014B c.

Carrier on P2 detected/wrong Channel Guard

P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1...

tb=500 msec ts=32 msec for P1

75-175 msec for P2 d.

Carrier on P1 and P2 detected/both wrong Channel

Guard

P1-P1-P2-P1-P1-P2-P1-P1-P2...

tb=2.5 seconds ts=75-175 msec e.

Carrier on P1 and right Channel Guard

Stop scan, display P1 f.

Carrier on P2 and right Channel Guard

Display P2, scan P1

P1-P1-P1-P1-P1-P1...

tb=500 msec ts=32 msec g.

Carrier on P2 with right Channel Guard, carrier/wrong Channel Guard on P1

P1-P1-P1-P1-P1-...

tb=2.5 seconds ts=75-175 msec

CONDITION 2: Priority 1 has Channel Guard Programmed, Priority 2 does not a.

No carriers detected on P1 or P2

P1-P1-P2-P1-P1-P2-P1-P1-P2-...

tb (time between samples) =500 msec ts (time of samples) =32 msec b.

Carrier on P1 detected/wrong Channel Guard

P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1-P2-...

tb=1 second ts=32 msec for P2

75 -175 msec for P1 c.

Carrier on P1 detected/right Channel Guard

Stop on P1, stop scan d.

Carrier on P2

Stop on P2, scan P1

P1-P1-P1-P1-...

tb=500 msec ts= 32 msec e.

Carrier on P2 and P1 with wrong Channel Guard on

P1

Stop on P2, scan P1

P1-P1-P1-P1-P1-P1-...

tb=2.5 seconds ts=75-175 msec

CONDITION 3: P2 has Channel Guard, P1 does not a.

No carriers detected on P1 or P2

P1-P1-P2-P1-P1-P2-P1-P1-P2-...

tb (time between samples) =500 msec ts (time of samples =32 msec b.

Carrier on P2 detected/wrong Channel Guard

P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1-...

tb=500 msec ts=32 msec for P1 ts=32 msec

75-175 msec for P2 c.

Carrier on P2 detected/right Channel Guard

Stop on P2, scan P1

P1-P1-P1-P1-P1-P1-...

tb=500 msec ts=32 msec d.

Carrier on P1 detected

Stop on P1, stop scan

CONDITION 4: P1 and P2 with no Channel Guard a.

No carriers detected on P1 or P2

P1-P1-P2-P1-P1-P2-P1-P1-P2-...

tb (time between samples) =500 msec ts (time of sample) =32 msec b.

Carrier on P2

P1-P1-P1-P1-P1-P1-...

tb=500 msec ts=32 msec c.

Carrier on P1

Stop on P1, stop scan

PUBLIC ADDRESS OPTION

OPERATION

If the Public Address Option is present, the radio may be used as public address amplifier. Press the programmed flex key or scroll through the menu to select the PA option (Scan must be off). The LED display will show "Pub Addr".

When the microphone is keyed, the radio no longer transmits, but allows the microphone audio to feed the speaker.

Adjust the VOLUME for the desired level. Press the programmed flex key or scroll through the menu a second time to disable the PA option. The display will return to normal channel display. Changing channels or turning on Scan will also turn the operation off.

7

LBI-39014B

The Public Address microphone audio normally feeds an external speaker. An ON/OFF switch, which is mounted on or near the radio, allows selecting either the internal or external speaker for the receiver audio. The ON/OFF switch turns the receiver audio on or off to the external speaker.

This switch still functions for the receiver audio with the PA option disabled.

GE tone system or Quick-Call (In Motorola tone systems) allows communication between all radios in a system.

ERICSSON GE TYPE 99 FORMAT

Tone frequencies in the Ericsson GE tone system fall within the range of 517.5 to 997.5 Hz.

TYPE 99 OPTION OPERATION

If the Type 99 option is present, selective calling is possible. Press the programmed flex key or scroll through the menu to select the T99 decoder option (Scan must be off).

The LED display will show "T99 ON" or "T99 OFF" for 2 seconds (PC programmable). During that time subsequent pressing of the flex key or Group/SEL buttons will toggle the T99 state between OFF and ON.

When a T99 call is received, the entire display will alternate between "T99" and the normal channel display and an alert tone will sound. If a call has been received and the display is flashing, CLR must be pressed before the T99 option can be turned off.

DETAILED TYPE 99 OPERATION

AND PROGRAMMING

The optional Type 99 Control Panel provides individual, group and super group call decode. The Motorola Formatted two-tone sequential signaling schemes can also be decode.

In Type 99 Tone systems, calls will not be heard from the receiver until the proper two tones are detected. When the second tone is decoded and recognized as correct, an alert tone sounds during the remaining portion of the second tone.

The receiver audio path opens and remains open to receive messages until the decoder is reset. The display will also flash to show a call has been received.

The MDX radio can be PC programmed with up to three separate tables of tones. Either the Ericsson GE Type 99 format or the Motorola format can be assigned to each tone table. The tone decoder can be enabled individually for each channel. Once enabled, one of the three tone tables can be selected for each channel. After choosing a tone table, the call formats must be specified: Individual, Group and Super

Group for the Ericsson GE format or Individual, Group and

Quick-Call for the Motorola format.

The Group Call format allows communications with all radios within a subgroup. The Super Group call (in Ericsson

NOTE

A round-off error will occur when entering the tone frequencies. This error is less than 0.2% and will not cause any decoding problems. For example, it the standard tone frequency of 517.5 Hz is entered, the actual decoder frequency will be 517.4 Hz. This new frequency will appear on the screen in the tone tables.

In the Ericsson GE tone format, the first tone may be from tone group A (for individual or Group calls) or from tone group C (for Super Group calls). The second tone may be from tone group B (for individual calls) or from tone group D (for Group and Super Group calls). The Ericsson

GE tone format is illustrated as follows:

ERICSSON GE TYPE 99 FORMAT

INDIVIDUAL CALL FORMAT

<----1.0 SEC---->

±

20%

<----200 MS---->

±

25%

<----1.0 SEC---->

+300% -0%

TONE A GAP TONE B

GROUP CALL FORMAT

<----1.0 SEC---->

±

20%

<----200 MS---->

±

25%

<----1.0 SEC---->

+300% -0%

TONE A GAP TONE D

SUPER GROUP CALL FORMAT

<----1.0 SEC---->

±

20%

<----200 MS---->

±

25%

<----1.0 SEC---->

+300% -0%

TONE C GAP TONE D

For example, assume the paging number to be 123. The first digit of the paging number is a 1. Look in Table 3 and read down the column labeled "100’s Digits" to a 1. Read horizontally across to the column labeled "10’s Digit". The

5

6

7

8

9

0

1

2

3

4 tone group is B. The second digit of the paging number is a 2.

The tone number is B2. Look in Table 3 and down the column labeled "Tone Designator" to find B2. Read horizontally across to the column labeled "Tone Frequency". The first tone frequency is 787.5 Hz.

To determine the second tone frequency look in Table 3 and as before, find the first digit of the paging number.

The second tone group is A. The third digit of the paging number is a 3 and the Tone Designator is A3. In Table 3 read down the column labeled "Tone designator" and find A3.

Read horizontally across to the column labeled "Tone Fre-

quency". The second tone frequency is 802.5 Hz.

For different paging numbers, locate the first digit in the

"100’s Digit" column and determine the tone frequencies as described in the example. For a complete description of tone applications see DATAFILE BULLETIN DF-5000-3A.

Tone D is the diagonal tone used (Ericsson GE tone systems only) when the first and second tone frequencies are the same. The standard frequency for Tone D is 742.5 Hz, but may be programmed with any tone frequency.

Table 3 - Tone Groups

100’s DIGIT 10’s DIGIT

For 1st Tone

A

B

B

A

C

C

C

A

B

Not Used

1’s DIGIT

For 2nd Tone

A

A

B

B

C

A

B

C

C

Table 4 - Tone Generator Frequencies

TONE

GROUP

A

B

C

Diagonal Tone

TONE

DESIGNATOR

C0

C1

C2

C3

C4

C5

C6

C7

C8

C9

B4

B5

B6

B7

B8

B9

B0

B1

B2

B3

A4

A5

A6

A7

A0

A1

A2

A3

A8

A9

TONE

FREQUENCIES

682.5 Hz

592.5 Hz

757.5 Hz

802.5 Hz

847.5 Hz

892.5 Hz

937.5 Hz

547.5 Hz

727.5 Hz

637.5 Hz

652.5 Hz

607.5 Hz

787.5 Hz

823.5 Hz

877.5 Hz

922.5 Hz

967.5 Hz

517.5 Hz

562.5 Hz

697.5 Hz

667.5 Hz

712.5 Hz

772.5 Hz

817.5 Hz

862.5 Hz

907.5 Hz

952.5 Hz

532.5 Hz

577.5 Hz

622.5 Hz

742.5 Hz

MOTOROLA FORMAT

Tone Frequencies in the Motorola tone system fall within the range 288.5 to 1433.4 Hz.

NOTE

Tone frequencies above 1000 Hz must be rounded off to the nearest Hz when programming the tone tables.

For example, the standard tone frequency of 1153.4 Hz must be entered as 1153 Hz. Also, the program will cause a round-off error of

±

0.2 Hz for frequencies below 1000 Hz. These errors will not cause any decoding problems.

8

In the Motorola tone format, the first tone may be one to three tones: A for individual call, B for Quick-Call and C for

Group Call. The second or final tone is B in all cases.

The Motorola tone format is illustrated as follows:

INDIVIDUAL CALL FORMAT

<-1.0 SEC MIN-> <----NONE----> <--3 SEC MIN-->

TONE B TONE A

GROUP CALL FORMAT

GAP

<-1.0 SEC MIN-> <----NONE----> <--3 SEC MIN-->

TONE C

QUICK CALL FORMAT

GAP TONE B

<-------------------------------8 SEC------------------------------->

TONEB

INDIVIDUAL CALL

Tables 4 & 5 may also be used to determine the tone frequencies. The first digit of the code determines the tone groups used in the code (See Table 4). Then Table 5 is used to determine the actual tone frequencies.

For a code of 124, the tone groups used are shown in Table

4. Tone A and Tone B are both located in Tone Group 1 and

Tone B is tone number 4. Refer to the following examples for additional information.

EXAMPLE 1 - Code 098:

The "0" in Table 4 (First Digit of Code) shows that Tone A is Tone Group 4 and Tone B is Tone Group 2 (See Table 5).

Tone number 9 in Tone Group 4 is 524.6 Hz

Tone number 8 in Tone Group 2 is 879.0 Hz

EXAMPLE 2 - Code 265:

The digit "2" in Table 5 shows that both Tone A and Tone B are both in Tone Group 2.

Tone number 6 is 788.5 Hz

Tone number 5 is 746.8 Hz

Table 5 - Motorola Type Coder Numbers

First Digit of

Code

7

8

5

6

3

4

1

2

9

0

A

Group From Which

Tone A Is Selected

4

5

5

2

1

4

1

2

2

4

3

Group From Which

Tone B Is Selected

5

4

5

1

2

4

1

2

4

2

3

GROUP CALL (Quick-Call Format)

In Group Call application, the Tone Group is determined by

Table 7, while the frequency is determined by Table 6. Refer to the following examples.

NOTE

Group Call code numbers range from 00 to 99. However, there are several group calls with the same Tone

B frequency. This limits the total number of groups called to 40.

EXAMPLE 1 - Group Call Code 07 (also code 27 and 37):

The digit "0" in Table 7 shows the Tone B is in Tone Group

2 (TG2) along with 20 to 29 and 30 to 39. Tone number 7 in

Tone Group 2 is 832.5 Hz (See Table 6).

EXAMPLE 2 - Group Call Code 98 (also code 48 and 88):

The digit "9" in Table 7 shows that Tone B is in Tone Group

(TG4) along with 40 to 49 and 80 to 89. Tone number 8 in

Tone Group 4 is 496.8 Hz.

Tone

No.

7

8

5

6

9

0

3

4

1

2

Tone

Group 1

349.0 Hz

368.5 Hz

389.0 Hz

410.8 Hz

433.7 Hz

457.9 Hz

483.5 Hz

510.5 Hz

539.0 Hz

330.5 Hz

LBI-39014B

Table 6 - Motorola Tone Frequencies and Groups

Tone

Group 2

600.9 Hz

634.5 Hz

669.9 Hz

707.3 Hz

746.8 Hz

788.5 Hz

832.5 Hz

879.0 Hz

928.1 Hz

569.1 Hz

Tone

Group 3

288.5 Hz

296.5 Hz

305.7 Hz

313.0 Hz

953.7 Hz

979.9 Hz

1006.9 Hz

1034.7 Hz

1063.2 Hz

1092.4 Hz

Tone

Group 4

339.6 Hz

358.6 Hz

378.6 Hz

399.8 Hz

422.1 Hz

445.7 Hz

470.5 Hz

496.8 Hz

524.6 Hz

321.7 Hz

Tone

Group 5

584.8 Hz

617.4 Hz

651.9 Hz

688.3 Hz

726.8 Hz

767.4 Hz

810.2 Hz

855.5 Hz

903.2 Hz

553.9 Hz

Table 7 - Motorola Group Call Tone Groups (TG)

Tone Number Tone Group

00-09

10-19

20-29

30-39

40-49

50-59

60-69

70-79

80-89

90-99

TG2

TG1

TG2

TG2

TG4

TG5

TG1

TG5

TG4

TG4

Tone

Group 6

1153.4 Hz

1185.2 Hz

1217.8 Hz

1251.4 Hz

1285.8 Hz

1321.2 Hz

1357.6 Hz

1395.0 Hz

1433.4 Hz

1122.5 Hz

9

LBI-39014B PARTS LIST

MDX



UHF MOBILE RADIO ASSEMBLY

19D904183P5

Issue 2

A1

A1

A1

A3

A4

A5

SYMBOL PART NO.

188D5062G2

188D5062G1

188D5062G3

19D901891G3

19D904025G2

19D903963G2

19D904792G2

19D904792G1

19D904792G3

344A4253G1

344A4256G3

344A4256G4

344A4256G5

DESCRIPTION

---------------------ASSEMBLIES--------------------

RF Board (403 - 440 MHz)

RF Board (440 - 470 MHz)

RF Board (470 - 512 MHz)

System Board

Audio Amplifier Board

Audio/Logic Board

Power Amplifier Board (403 - 440 MHz)

Power Amplifier Board (440 - 470 MHz)

Power Amplifier Board (470 - 512 MHz)

---------------------KITS--------------------

Hardware Kit No. 1

Hardware Kit No. 2 (403 - 440 MHz)

Hardware Kit No. 2 (440 - 470 MHz)

Hardware Kit No. 2 (470 - 512 MHz)

19A704884P4

19A704884P4

19B801467P1

19B801253P5

19A705235P3

----------------------------CABLES--------------------------

J1 To J103

J2 To J102

J3 to J705 to J704

Cable, Ribbon, between J707 on Audio Ampliffier

Board to P707 on Display Board

Cable, Ribbon, between J901 on Audio Amplifier

Board to J902 on System Board

19D904027P1

19C337683G2

19D904185G1

19D904186G1

19D904187G1

19B801358P18

--------------------------MISCELLANEOUS---------------------

---

Casting

Bracket

Cover, Bottom

Cover, Top

Panel, Front

Cable, 9 Foot, Power

MDX UHF Mobile Radio

(19D904183, Sh. 2, Rev. 18)

10

ASSEMBLY DIAGRAM

ASSEMBLY DIAGRAM LBI-39014B

MDX UHF Mobile Radio

(19D904183, Sh. 5, Rev. 18)

11

LBI-39014B ASSEMBLY DIAGRAM

MDX UHF Mobile Radio

(19D904183, Sh. 7, Rev. 18)

12

INTERCONNECTION DIAGRAM LBI-39014B

MDX UHF Mobile Radio

(188D5198, Sh. 1, Rev. 1)

13

LBI-39014B INTERCONNECTION DIAGRAM

MDX UHF Mobile Radio

(188D5198, Sh. 3, Rev. 1)

14

INTERCONNECTION DIAGRAM LBI-39014B

MDX UHF Mobile Radio

(188D5198, Sh. 4, Rev. 1)

15