Ericsson EDACS Monogram Series User manual

ericssonzericssonz
Maintenance Manual
MONOGRAM SERIES
EDACSTrunking Portable
800 MHz

AE/LZB119 1647 R1A
2
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The software contained in this device is copyrighted by Ericsson Inc. Unpublished rights are reserved under the copyright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.
CopyrightAugust 1996, Ericsson, Inc.

AE/LZB 119 1647 R1A
3
TABLE OF CONTENTS
Page
SPECIFICATIONS...........................................................................................................................................3
INTRODUCTION ............................................................................................................................................9
STANDARD RADIO FEATURES ...........................................................................................................9
Carrier Control Timer (CCT)..............................................................................................................9
Audio Alert Beeps ..............................................................................................................................9
Low Battery Alert...............................................................................................................................9
Power Up Self Test.............................................................................................................................9
CONVENTIONAL FEATURES...............................................................................................................9
Manual DTMF Operation...................................................................................................................9
TRUNKED FEATURES (EDACS/GEMARC).........................................................................................11
Preprogrammed DIG/DTMF Numbers...............................................................................................11
HOME........................................................................................................................................................11
Keypad Lock.......................................................................................................................................11
Power Up System/Group ....................................................................................................................11
Manual Individual Calls......................................................................................................................11
Manual Interconnect ........................................................................................................................... 11
Store....................................................................................................................................................11
Recall Last Number Send ...................................................................................................................11
EDACS (ONLY) FEATURES...................................................................................................................11
Group Scan ......................................................................................................................................... 11
Automatic Login.................................................................................................................................11
System/Group Selections....................................................................................................................11
Conventional Failsoft..........................................................................................................................11
SCAT..................................................................................................................................................11
Base/Mobile Operation.......................................................................................................................11
Priority System Scan (Optional) .........................................................................................................11
Emergency (Optional).........................................................................................................................12
Wide Area Scan (Optional).................................................................................................................12
Dynamic Regrouping (Optional).........................................................................................................12
GE-MARC (ONLY) FEATURES .............................................................................................................12
Talk-Around (Direct Mode)................................................................................................................12
SYSTEM DESCRIPTION................................................................................................................................12
EDACS ......................................................................................................................................................12
CONVENTIONAL MODE .......................................................................................................................13
GE-MARC.................................................................................................................................................13
Operational Modes..............................................................................................................................14

AE/LZB119 1647 R1A
4
Idle Mode............................................................................................................................................14
Wait Mode ..........................................................................................................................................14
Ready Mode........................................................................................................................................14
GLOSSARY OF GE-MARC TERMS .......................................................................................................15
Idle Mode............................................................................................................................................15
Wait Mode ..........................................................................................................................................15
Ready Mode........................................................................................................................................15
Busy Tone...........................................................................................................................................15
Acquisition Tone.................................................................................................................................15
Collect Tone........................................................................................................................................15
Group/Individual Tones......................................................................................................................16
RADIO OPERATION.......................................................................................................................................16
USER INTERFACE...................................................................................................................................16
Turning The Radio ON/OFF...............................................................................................................16
ALERT TONES................................................................................................................................................16
EDACS APPLICATIONS .........................................................................................................................16
GE-MARC APPLICATIONS....................................................................................................................17
ERROR MESSAGES........................................................................................................................................17
KEYPAD LOCK...............................................................................................................................................18
RF BOARD THEORY OF OPERATION 650-020-0002.................................................................................18
DESCRIPTION..........................................................................................................................................18
CIRCUIT ANALYSIS ......................................................................................................................................18
RECEIVER SECTION ..............................................................................................................................18
RF Amplifier and 1st Mixer................................................................................................................18
1st IF Filter and Amplifier ..................................................................................................................18
2nd Mixer and Detector ......................................................................................................................19
TRANSMITTER SECTION......................................................................................................................19
Synthesizer Switching and Buffering..................................................................................................19
Power Module and Antenna Switching Module..................................................................................19
Forward Power Detector and APC......................................................................................................19
PLL CIRCUIT DESCRIPTION.................................................................................................................19
VCO and Buffer Amplifier..................................................................................................................19
PLL IC (U105) AND LOOP FILTER........................................................................................................20
Lock Detector......................................................................................................................................20
Power Switching and Voltage Regulator.............................................................................................20
DIGITAL BOARD THEORY OF OPERATION 650-010-0003......................................................................20

AE/LZB 119 1647 R1A
5
CIRCUIT ANALYSIS......................................................................................................................................20
MICRO CONTROLLER U701 .................................................................................................................20
Operating Program..............................................................................................................................21
Clock Circuitry ...................................................................................................................................21
Display Interfacing..............................................................................................................................21
RF Board Interfacing..........................................................................................................................21
Audio Signal Processor Control..........................................................................................................21
Address Demultiplexing .....................................................................................................................21
Address Decoding and Processor Control Outputs.............................................................................22
FLASH EEPROM U703............................................................................................................................22
RAM U707 ................................................................................................................................................22
MODEM U702..........................................................................................................................................22
High-Speed Data Conversions............................................................................................................23
Address Demultiplexing .....................................................................................................................23
Address Decoding...............................................................................................................................23
Reset Logic.........................................................................................................................................23
Clock Circuitry ...................................................................................................................................23
SERIAL NUMBER ROM U706................................................................................................................23
AUDIO SIGNAL PROCESSOR U804......................................................................................................24
Receive Audio Paths...........................................................................................................................24
EDACS & Conventional RX Audio Modes.................................................................................24
High-Speed Data Limiter.............................................................................................................24
Low-Speed Tone/Data Decoding.................................................................................................24
GE-MARC Mode RX Audio.......................................................................................................24
GE-MARC Tone Decoding.........................................................................................................25
Receive Noise Squelch ................................................................................................................25
Receive Alert Tones ....................................................................................................................25
Transmit Audio Paths .........................................................................................................................26
High-Speed Data Encoding .........................................................................................................26
GE-MARC Busy Tone Encoding ................................................................................................26
DTMF Tone Encoding.................................................................................................................27
5-VOLT REGULATOR U801...................................................................................................................27
DISPLAY BOARD THEORY OF OPERATION 650-170-0001.....................................................................27
DESCRIPTION.................................................................................................................................................27
CIRCUIT ANALYSIS...............................................................................................................................27
Control Switches.................................................................................................................................27
Liquid Crystal Display (LCD) ............................................................................................................27
PERSONALITY EEPROM U104.............................................................................................................28
DTMF ENCODER U803...........................................................................................................................28

AE/LZB119 1647 R1A
6
MICROPHONE AND SPEAKER.............................................................................................................28
INTERNAL/EXTERNAL SPEAKER/MIC. SWITCH .............................................................................28
DISASSEMBLY...............................................................................................................................................28
FRONT PANEL ASSEMBLY REMOVAL AND REPLACEMENT.......................................................28
To remove the front panel assembly: ..................................................................................................28
To replace the front panel assembly:...................................................................................................28
DIGITAL PRINTED CIRCUIT BOARD REMOVAL AND REPLACEMENT......................................29
To remove the Printed Circuit Board:.................................................................................................29
MICROPHONE AND SPEAKER REMOVAL AND REPLACEMENT .................................................29
To remove the microphone and speaker:.............................................................................................29
KEYPAD BOARD REMOVAL AND REPLACEMENT.........................................................................29
To remove the Keypad Board:............................................................................................................29
RF BOARD REMOVAL AND REPLACEMENT....................................................................................29
To remove RF board:..........................................................................................................................29
PTT Switch Assembly Removal and Replacement:............................................................................30
TROUBLESHOOTING....................................................................................................................................30
VOLTAGE CHART..........................................................................................................................................34
BATTERY CHARGING AND CARE..............................................................................................................37
FOR BEST PERFORMANCE...................................................................................................................37
PARTS LIST.....................................................................................................................................................38
COMPONENT PINOUT ..................................................................................................................................45
SYSTEM WIRING DIAGRAM .......................................................................................................................47
KEYPAD/DISPLAY BOARD SERVICE OUTLINE ......................................................................................48
SCHEMATIC DIAGRAMS:
PTT SWITCH BOARD .............................................................................................................................49
KEYPAD/DIGITAL BOARD....................................................................................................................50
RF BOARD.......................................................................................................................................................51
DIGITAL BOARD (2 SHEETS) ......................................................................................................................52
BLOCK DIAGRAM .........................................................................................................................................54

AE/LZB 119 1647 R1A
7
SPECIFICATIONS
Input Voltage: 7.5 VDC (Nominal)
Dimensions (Typical) (HxWxD): Less Antenna
7” x 2.5” x 1.5”
(17.78 x 6.35 x 3.81 cm)
Weight Radio with Medium Capacity Battery: 23.03 oz (653 g)
Ambient Temperature Range: -22°F to +140°F
(-30°C to +60°C)
Relative Humidity: 95% at 122°F (50°C)
Altitude:Operational: 15,000 ft (4,572 m)
In Transit: 55,000 ft (16,764 m)
Display: 7 Character Alphanumeric
Memory Levels: 16, 128 EDACS Systems/Groups
9 Areas/9 Groups GE•MARC V
Programming: PC, IBM®, or IBM compatible
TRANSMITTER
Frequency Range (MHz): 806-824 851-869 Talk Around
Frequency Separation (MHz)
(No Degradation) 18
RF Power (Watts): 2 (±10%)
Modulation Limiting (kHz): 5 max
FM Hum And Noise (dB): -40 (companion Rx)
Conducted Spurious (dB): -65 (-30 dbm)
Frequency Stability (PPM): ≤1.5
Channel Spacing (kHz): 25 / 12.5 (NPSPAC)
Audio Response: EIA
Audio Distortion: ≤5%
RECEIVER
Frequency Range (MHz): 851-869
Frequency Separation (MHz): 18
Sensitivity (12 dB SINAD) (dBM): -116 (0.35µV)
Selectivity
@ 25 kHz (dB): -65
@ 12.5 kHz (dB) NPSPAC: -20
Intermodulation (dB): -65
Spurious Response Image Rejection: (dBc) -65
Frequency Stability (PPM): ≤1.5
Channel Spacing (kHz): 25 / 12.5 (NPSPAC)
Audio Output (mW): 400
Distortion (at Rated Audio): ≤10%

AE/LZB119 1647 R1A SPECIFICATIONS
8
ENVIRONMENTAL SPECIFICATIONS U.S. Military Spec 810C U.S. Military Spec 810D
Standard Methods & Procedures Methods & Procedures
Low Pressure 500.1/1 500.2/1,2
High Temperature 501.1/1 501.2/1,2
Low Temperature 502.1/1 502.2/2
Temperature Shock 503.1/1 503.2/1
Solar Radiation 505.1/1 505.2/2
Humidity 507.1/2 507.2/2
Blowing Dust 510.1/1 510.2/1
Vibration 514.2/8,10 514.3/1
Shock 516.2/1,2, & 5 516.3/1,4
REGULATORY DATA
Frequency Range (MHz) 806-870
FCC Type Acceptance F3JETP4800
RF Output 2 Watts
FCC Rules 22, 90
DOC Type Number 287 195 105A

AE/LZB 119 1647 R1A
9
INTRODUCTION
The EDACS Monogram Portable Radio is a rugged,
lightweight unit which is housed in a molded Lexan front
assembly and an aluminum rear casting. The radio provides
reliable service in the 800 MHz band and contains new Dual
Format technology that enables the radio to operate within a
GE-MARC trunked system and an EDACS trunked system.
The radio normally transmits in the 806-824 MHz band and
receives from 851-869 MHz. The radio is able to transmit
from 851-869 MHz for Talk-Around in the GE-MARC
system.
The Dual Format EDACS Monogram radio is offered
with several packages available with respect to the number
of systems/groups programmed and the EDACS feature set
allowed. The radio is also capable of Conventional
operation. The Radio is programmed using a Personal
Computer and an Interface Box connected to the UDC
connector on the top panel of the radio. This allows the
radio to be tailored to meet the requirements of the
individual user and of the System(s) it is operating within.
Figure 1 - Portable Radio
STANDARD RADIO FEATURES
Carrier Control Timer (CCT)
The CCT is programmable on a per channel basis and
prevents unnecessary channel traffic and radio damage if the
transmit timer is exceeded. If the programmed timer times
out during a transmission, the radio will beep and stop
transmitting. The beeping tone will continue until the
operator releases the PTT button.
Audio Alert Beeps
The radio generates a number of alert tones to indicate
various events.
Low Battery Alert
When the battery is low and needs to be recharged, the
B will displayed and a low pitch tone will sound every 130
seconds.
Power Up Self Test
Each time the radio is turned on it will perform a
power-up self test. After successful completion of the test,
an optional tone will sound and the current System and
Group/Channel will be displayed. If the unit does not pass
the self test, an error message will be displayed.
CONVENTIONAL FEATURES
Channel Guard provides a means of restricting calls to
specific radios through the use of a Continuous Tone Coded
Squelch System. (CTCSS), or a multi-code Digital Squelch
System (DCG). Tone frequencies range from 67 Hz to 210.7
Hz. There are 83 standard programmable digital codes.
Refer to Table 1 and Table 2.
Manual DTMF Operation
Telephone interconnect calls can be made using the 12-
button keypad. This keypad is enabled when a DTMF
programmed channel is selected and PTT button is pressed.

AE/LZB119 1647 R1A
10
Table 1 - Standard 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.
Table 2 - Digital Channel Guard Tones
PRIMARY
CODE EQUIVALENT CODE PRIMARY CODE EQUIVALENT CODE PRIMARY CODE EQUIVALENT CODE
023 340 766 251 236 704 742 632 123 657
025 261 227 567 565 307 362
026 566 263 213 736 654 163 460 607
031 374 643 265 171 426 662 363 436 443 444
032 271 427 510 762 664 344 471 715
043 355 306 147 303 761 703 150 256
047 375 707 311 330 456 561 712 136 502
051 520 771 315 321 673 723 235 611 671
054 405 675 331 372 507 731 447 473 474 744
065 301 343 324 570 732 164 207
071 603 717 746 346 616 635 724 734 066
072 470 701 351 353 435 743 312 515 663
073 640 364 130 641 754 076 203
074 360 721 365 107 036 137
114 327 615 371 217 453 530 053
115 534 674 411 117 756 122 535
116 060 737 412 127 441 711 145 525
125 173 413 133 620 212 253
131 572 702 423 234 563 621 713 225 536
132 605 634 714 431 262 316 730 246 542 653
134 273 432 276 326 252 661
143 333 445 222 457 575 255 425
152 366 415 464 237 642 772 266 655
155 233 660 465 056 656 274 652
156 517 741 466 144 666 325 550 626
162 416 553 503 157 322 332 433 552
165 354 506 224 313 574 356 521
172 057 516 067 720 446 467 511 672
174 142 270 532 161 345 452 524 765
205 135 610 546 317 614 751 454 513 545 564
223 350 475 750 606 153 630 455 533 551
226 104 557 612 254 314 706 462 472 623 725
243 267 342 624 075 501 523 647 726
244 176 417 627 037 560 526 562 645
245 370 554 631 231 504 636 745
NOTE: Primary codes in bold are unique Ericsson codes.