Datron TW-7000 Service manual

TW7000MS

TW7000

HF Transceiver

Technical Manual

Datron World Communications Inc.

Manual Part No. TW7000MS

Release Date: June 2007

Revision: F

3030 Enterprise Court

Vista, CA 92081, U.S.A.

Phone: [phone] Fax: [phone]

E-Mail: [e-mail]

www.dtwc.com

Change Description

Date of
Revision

Revision
Letter

Description of Changes

2/2005 E Information regarding updated boards, schematics,

part lists including the new Processor board,
Ref/Control board and the High Stability option.

6/2007 F Removal of references to LCD/driver board,

information for the FALC option and updates as
required to boards, schematics and part lists.

Pages
Affected

All

All

TW7000MS i

© 2003 Datron World Communications (Datron)
All rights reserved.

Datron World Communications

This manual, as well as the software described in it, is
furnished under license and may only be used or copied
in accordance with the terms of such license. The information
in this manual is furnished for informational use
only, is subject to change without notice, and should not
be construed as a commitment by Datron. Datron
assumes no responsibility or liability for any errors or
inaccuracies that may appear in this book.
Except as permitted by such license, no part of this publication
may be reproduced, stored in a retrieval system,
or transmitted, in any form or by any means, electronic,
mechanical, recording, or otherwise without the prior
written permission of Datron.

Software License Agreement and Warranty

This software is licensed to the user (licensee) under the
express terms and conditions of Datron’s software
licensing policies and agreement as outlined below. By
receiving and installing this software package the user
(licensee) has indicated acceptance of the terms and conditions
of this agreement presented herewith.
As used in this document, the term “Software” shall
mean the application or control software in machine readable
format and the hardware protection key, along with any or all
supporting documentation, as well as all updated or enhanced
versions of the program supplied to the user at later date(s).
This software license does not include source code, and there­fore, no license is granted with respect to source code of any
kind utilized directly or indirectly in any Datron or Datron
supplied third party product. Note, in some cases, covered
software may be included in Datron products in RAM or
ROM, and/or forms of machine readable code, not readily
accessible to the user or licensee.
In consideration of the terms and conditions of this
agreement, Datron grants the user a non-exclusive, nontrans­ferable license to install and operate one copy of the program.
Licensee agrees not to attempt, aid, authorize, or direct any
effort, either directly or indirectly to reverse engineer or
reverse compile the Software. Licensee further agrees they or
their agents are not authorized to
make derivative versions or changes to the Software.
Title to and ownership of the Software shall at all times
remain with Datron and/or its licensors. Further, no
license is granted to copy or reproduce in any form whatsoever
the Software supplied without the express written permission
of Datron, prior to any such contemplated action.
Datron may terminate this agreement and discontinue
further warranty coverage at any time due to failure to
comply with the terms and conditions of this agreement.
In such an event, Datron will provide the user
with written notice of such a “failure-to-comply” and the
user will have 10 days to demonstrate that a remedy has
been implemented. If the user fails to perform, the
agreement will be terminated by further written notice
from Datron. Upon termination, the user shall immediately

return all original Software, documentation, and
any copies of each to Datron.
This Software is licensed “AS IS” and Datron provides a war­ranty that covers the media upon which the Software is embed­ded for a period of 30 days from receipt of the product. Under
this warranty policy Datron’s sole obligation shall be to
replace or repair, at Datron’s discretion, any such media that in
Datron’s opinion proves defective.
The user is obligated to provide Datron with a detailed
description of possible defects along with sample material
such that Datron can reproduce the identified defects.
By receipt and use, user (licensee) acknowledges that
certain software developed or distributed by Datron is
controlled by one or more governmental agencies. The
user (licensee) herewith acknowledges they will take all
necessary actions to comply with applicable regulations
concerning the use of licensed software. Further, Datron
is under no obligation to supply source code or documentation
of its software for any reason.
Datron makes no representation, express or implied, with
respect to any Software licensed under this document as to its
fitness for any particular purpose or intended use.
Furthermore, Datron shall have no liability under this
agreement for any incidental, special, or consequential
damages arising out of the use of any supplied software
programs. Datron reserves the right to make periodic
changes in it’s software for any purpose without any
obligation to notify users.

One Year Limited Warranty and Remedies

Datron warrants that its equipment is free from defects in
design, materials, and workmanship for a period of 12
months from the date of installation of the equipment,
but in no event later than 15 months from the date of
shipment. If the equipment does not provide satisfactory
service due to defects covered by this warranty, Datron
will, at its option, replace or repair the equipment free of
charge.
Should it be impractical to return the equipment for
repair, Datron will provide replacements for defective
parts contained in the equipment for a period of 12
months from the date of installation of the equipment,
but in no event later than 15 months from the date of
shipment.
This warranty is limited to the original purchaser and is
not transferable. Repair service performed by Datron is
warranted for the balance of the original warranty or 90
days, whichever is longer.

Exclusive Warranty: There are no other warranties
beyond the warranty as contained herein. No agent,
employee, or representative of Datron has any authority
to bind Datron to any affirmation, representation, or warranty
concerning the equipment or its parts that is not in
conformity with the warranties contained herein.
EXCEPT AS EXPRESSLY SET FORTH ABOVE, NO
OTHER WARRANTIES, EITHER EXPRESS OR
IMPLIED, ARE MADE WITH RESPECT TO THE
EQUIPMENT OR THE PARTS CONTAINED

TW7000MS iii

THEREIN, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, AND
DATRON EXPRESSLY DISCLAIMS ALL WARRANTIES
NOT STATED HEREIN.
Limitations of Warranty: This warranty does not
cover:
Physical damage to the equipment or its parts that does
not involve defects in design, material, or workmanship,
including damage by impact, liquids, temperature, or
gases.
Damage to the equipment or its parts caused by lightning,
static discharge, voltage transients, or application
of incorrect supply voltages.
Defects or failures caused by unauthorized attempts to
repair or modify the equipment.
Defects or failures caused by Buyer abuse or misuse.
Return of Equipment - Domestic: To obtain performance
of any obligation under this warranty, the equipment
must be returned freight prepaid to the Technical
Support Services. Datron World Communications Inc.,
3030 Enterprise Court, Vista, California 92083. The
equipment must be packed securely. Datron shall not be
responsible for any damage incurred in transit. A letter
containing the following information must be included
with the equipment.
a. Model, serial number, and date of installation.
b. Name of dealer or supplier of the equipment.
c. Detailed explanation of problem.
d. Return shipping instructions.
e. Telephone or fax number where Buyer may be contacted.
Datron will return the equipment prepaid by United Parcel
Service, Parcel Post, or truck. If alternate shipping is
specified by Buyer, freight charges will be made collect.
Return of Equipment - International: Contact Datron or
your local Representative for specific instructions. Do
not return equipment without authorization. It is usually
not possible to clear equipment through U.S. Customs
without the correct documentation. If equipment is
returned without authorization, Buyer is responsible for
all taxes, customs duties, clearance charges, and other
associated costs.
Parts Replacement: The following instructions for the
supply of replacement parts must be followed:
a. Return the parts prepaid to “Parts Replacement”
Datron World Communications Inc., 3030 Enterprise
Court, Vista, California 92083; and
b. Include a letter with the following information:

1. Part number

2. Serial number and model of equipment

3. Date of installation
Parts returned without this information will not be
replaced. In the event of a dispute over the age of the
replacement part, components date-coded over 24
months previously will be considered out of warranty.
Remedies: Buyer’s sole remedies and the entire liability
of Datron are set forth above. In no event will Datron be
liable to Buyer or any other person for any damages,
including any incidental or consequential damages,

expenses, lost profits, lost savings, or other damages
arising out of use of or inability to use the equipment.
1/95

Safety Considerations

This product and manual must be thoroughly understood
before attempting installation and operation. To do so
without proper knowledge can result in equipment failure
and bodily injury.
Caution: Before applying ac power, be sure that the
equipment has be properly configured for the available
line voltage. Attempted operation at the wrong voltage
can result in damage and voids the warranty. See the
manuals section on installation. DO NOT operate equipment
with cover removed.
Earth Ground: All Datron products are supplied with a
standard, 3-wire, grounded ac plug. DO NOT attempt to
disable the ground terminal by using 2-wire adapters of
any type. Any disconnection of the equipment ground
causes a potential shock hazard that could result in personal
injury. DO NOT operate any equipment until a suitable ground
has been established. Consult the manual section on ground­ing.
Servicing: Trained personnel should only carry out servicing.
To avoid electric shock, DO NOT open the case
unless qualified to do so.
Various measurements and adjustments described in this man­ual are performed in ac power applied and the protective
covers removed. Capacitors (particularly the
large power supply electrolytics) can remain charged for
a considerable time after the unit has been shut off. Use
particular care when working around them, as a short circuit
can release sufficient energy to cause damage to the equipment
and possible injury.
To protect against fire hazard, always replace line fuses
with ones of the same current rating and type (normal
delay, slow-blow, etc.). DO NOT use higher value
replacements in an attempt to prevent fuse failure. If
fuses are failing repeatedly this indicates a probable
defect in the equipment that needs attention.
Use only genuine Datron factory parts for full performance
and safety of this product.

Made in the USA

iv TW7000MS

CONTENTS

Chapter 1: Introduction

1.1 The TW7000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 Transceiver Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.3 Internal Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.4 TW7000 Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.5 Input Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.6 Antenna Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.8 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.9 Referenced Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2: Installation

2.1 Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 Preinstallation Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.3 Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.4 Front Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.5 Rear Panel Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-1. TW7000 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Table 2-1. Pinouts for Accessory Connector 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Table 2-2. Pinouts for Accessory Connector 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Table 2-3. Pinouts for Accessory Connector 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-2. Power Cabling Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-3. RF Cabling Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-4. Control Cabling Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Chapter 3: Theory of Operation

3.1 Transceiver Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 Power Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Figure 3-1. System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-2. Power Distribution Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Table 3-1. Transceiver Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-3. Transceiver Frequency Generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Figure 3-4. Transceiver Frequency Mixing Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.3 Frequency Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

3.4 Receiver Signal Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-5. Transceiver Receive Path Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

3.5 Transmit Signal Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.6 Receive and Transmit Path Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-6. Transceiver Transmit Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

TW7000MS v

3.7 Transceiver Control Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

3.8 Mainframe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-7. Mainframe Wiring Schematic Diagram (994126 Rev. K) . . . . . . . . . . . . . 3-15

Chapter 4: Technical Description

4.1 Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Table 4-1. Power Supply Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Figure 4-1. Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Figure 4-2. Power Supply Board Component Locations (738223 Rev. G) . . . . . . . . . . 4-6

Figure 4-3. Power Supply Board Schematic Diagram (994158 Rev. M) . . . . . . . . . . . . 4-7

Table 4-2. Power Supply Board Parts List (001-00410 Rev. AA) . . . . . . . . . . . . . . . . 4-9

4.2 Reference/Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Table 4-3. Reference/Control Board Interconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Figure 4-4. Reference/Control Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Figure 4-5. Reference/Control Board Component Locations (738341 Rev. A) . . . . . . 4-16

Figure 4-6. Reference/Control Board Schematic Diagram (994487 Rev. A) . . . . . . . . 4-17

Table 4-4. Reference/Control Board Parts List (001-00206 Rev. E). . . . . . . . . . . . . . 4-19

4.3 Synthesizer Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

Table 4-5. Synthesizer Board Interconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

Figure 4-7. Synthesizer Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Figure 4-8. Synthesizer Board Component Locations (738351 Rev. F) . . . . . . . . . . . . 4-28

Figure 4-9. Synthesizer Board Schematic Diagram (994304 Rev. C) . . . . . . . . . . . . . 4-29

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P) . . . . . . . . . . . . . . . . . . . 4-31

4.4 VSWR Detector Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40

Figure 4-10. VSWR Detector Board Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40

Figure 4-11. VSWR Detector Board Component Locations (738293 Rev. F) . . . . . . . 4-42

Figure 4-12. VSWR Detector Board Schematic Diagram (994240 Rev. D) . . . . . . . . . 4-43

Table 4-7. VSWR Detector Board Parts List (001-00201 Rev. J). . . . . . . . . . . . . . . . 4-45

4.5 RF Filter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46

Figure 4-13. RF Filter Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47

Figure 4-14. RF Filter Board Component Locations (738228 Rev. K) . . . . . . . . . . . . . 4-48

Figure 4-15. RF Filter Board Schematic Diagram (994139 Rev. N) . . . . . . . . . . . . . . . 4-49

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V) . . . . . . . . . . . . . . . . . . . . . 4-51

4.6 RF Power Amplifier Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57

Figure 4-16. RF Power Amplifier Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 4-57

Figure 4-17. RF Power Amplifier Board Component Locations (738587 Rev. A) . . . . 4-58

Figure 4-18. RF Power Amplifier Board Schematic Diagram (994182 Rev. E) . . . . . . 4-59

Table 4-9. RF Power Amplifier Board Parts List (004-00311 Rev. A) . . . . . . . . . . . . 4-61

Table 4-10. RF Amplifier Assembly Parts List (004-12260 Rev. P). . . . . . . . . . . . . . . 4-63

4.7 75 MHz IF Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-64

Table 4-11. 75 MHz IF Board Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-65

Figure 4-19. 75 MHz IF Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-67

Figure 4-20. 75 MHz IF Board Component Locations (738332 Rev. G) . . . . . . . . . . . . 4-68

Figure 4-21. 75 MHz IF Board Schematic Diagram (994292 Rev. H) . . . . . . . . . . . . . . 4-69

Table 4-12. 75 MHz Board Parts List (001-00710 Rev. U). . . . . . . . . . . . . . . . . . . . . . 4-71

4.8 5 MHz IF Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78

Table 4-13. 5 MHz IF Board Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79

Figure 4-22. 5 MHz IF Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-81

Figure 4-23. 5 MHz IF Board Component Locations (738208 Rev. J). . . . . . . . . . . . . . 4-82

Figure 4-24. 5 MHz IF Board Schematic Diagram (994136 Rev. K) . . . . . . . . . . . . . . . 4-83

vi TW7000MS

Table 4-14. 5 MHz IF Board Parts List (001-00800 Rev. AA) . . . . . . . . . . . . . . . . . . . 4-85

4.9 Audio Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-95

Table 4-15. Audio Board Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-96

Figure 4-25. Audio Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-99

Figure 4-26. Audio Board Component Locations (738211 Rev. G) . . . . . . . . . . . . . . . 4-100

Figure 4-27. Audio Board Schematic Diagram (994157 Rev. I) . . . . . . . . . . . . . . . . . 4-101

Table 4-16. Audio Board Parts List (001-00600 Rev. U) . . . . . . . . . . . . . . . . . . . . . . 4-103

4.10 Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-110

Figure 4-28. Front Panel Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-112

Table 4-17. Front Panel Interconnections to Motherboard . . . . . . . . . . . . . . . . . . . . . 4-113

Table 4-18. Front Panel Interconnections to Display . . . . . . . . . . . . . . . . . . . . . . . . . 4-114

Table 4-19. Front Panel Interconnection to Switch Board. . . . . . . . . . . . . . . . . . . . . . 4-115

Table 4-20. Front Panel Interconnection to Power/Volume Control . . . . . . . . . . . . . . 4-115

Table 4-21. Front Panel Interconnections to Clarifier . . . . . . . . . . . . . . . . . . . . . . . . . 4-116

Table 4-22. Front Panel Interconnection to Microphone. . . . . . . . . . . . . . . . . . . . . . . 4-116

Figure 4-29. Front Panel Assembly Component Locations (738207 Rev. J) . . . . . . . . 4-118

Figure 4-30. Front Panel Assembly Schematic Diagram (994130 Rev. R) . . . . . . . . . 4-119

Table 4-23. Front Panel Assembly Parts List (001-00143 Rev. P) . . . . . . . . . . . . . . . 4-121

Figure 4-31. Switch Board Component Locations (738195 Rev. B) . . . . . . . . . . . . . . 4-128

Figure 4-32. Front Panel Switch Board Schematic Diagram (994149 Rev. A) . . . . . . 4-129

Table 4-24. Switch Board Parts List (001-00110 Rev. A1). . . . . . . . . . . . . . . . . . . . . 4-131

4.11 Processor Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-132

Figure 4-33. RX Audio Distribution Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4-138

Figure 4-34. TX Audio Distribution Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4-138

Table 4-25. Enable Line Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-139

Table 4-26. Parallel Printer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-140

Table 4-27. Processor Board Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-141

Figure 4-35. Main Processor Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-146

Figure 4-36. Processor Board Component Locations (738562 Rev. A) . . . . . . . . . . . . 4-147

Figure 4-37. Processor Board Schematic Diagram 1 of 4 (994510 Rev. A) . . . . . . . . . 4-149

Figure 4-38. Processor Board Schematic Diagram 2 of 4 (994510 Rev. A) . . . . . . . . . 4-151

Figure 4-39. Processor Board Schematic Diagram 3 of 4 (994510 Rev. A) . . . . . . . . . 4-153

Figure 4-40. Processor Board Schematic Diagram 4 of 4 (994510 Rev. A) . . . . . . . . . 4-155

Table 4-28. Processor Board Parts List (001-01101 Rev. C). . . . . . . . . . . . . . . . . . . . 4-157

Chapter 5: Maintenance

5.1 Subassembly Breakdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 Internal Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.3 Board Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Figure 5-1. Board Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Figure 5-2. Final Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Figure 5-3. Front Panel Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Figure 5-4. Rear Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-1. Subassemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

5.4 Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

5.5 Basic Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

5.6 Detailed Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Table 5-2. Detailed Performance Test Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5.7 Subassembly Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

TW7000MS vii

Table 5-3. BITE Line Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

5.8 Main Processor Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Table 5-4. Troubleshooting the Processor Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

5.9 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

Table 5-5. Jumper Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

Table 5-6. COM2 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Table 5-7. COM1 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Chapter 6: Internal Options

6.1 Additional Channel Option (7000ACH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Figure 6-1. Additional Channel Jumper Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.2 Automatic Link Establishment (7000ALE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Figure 6-2. ALE Jumper Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Figure 6-3. ALE Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Figure 6-4. ALE Board Component Locations (738215 Rev. A) . . . . . . . . . . . . . . . . . . 6-8

Figure 6-5. ALE Board Schematic Diagram (994166 Rev. D). . . . . . . . . . . . . . . . . . . . 6-9

Table 6-1. ALE Board Parts List (010-00200 Rev. G . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

Figure 6-6. ALE Interface Component Locations (738229 Rev. C) . . . . . . . . . . . . . . . 6-14

Figure 6-7. ALE Interface Schematic Diagram (994159 Rev. A). . . . . . . . . . . . . . . . . 6-15

Table 6-2. ALE Interface Parts List (001-01301 Rev. E) . . . . . . . . . . . . . . . . . . . . . . 6-17

6.3 Clock Option (7000CLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

Figure 6-8. Clock Option Component and Jumper Placement . . . . . . . . . . . . . . . . . . . 6-18

6.4 Data Interface Option (7000RS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19

Figure 6-9. Data Interface Component and Jumper Placement. . . . . . . . . . . . . . . . . . . 6-19

6.5 Encryption Option (7000ENCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

6.6 Fast ALC (7000FALC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

Figure 6-10. Fast ALC Board Component Locations (738341 Rev. A) . . . . . . . . . . . . . 6-22

Figure 6-11. Fast ALC Board Schematic Diagram (994074 Rev. A) . . . . . . . . . . . . . . . 6-23

Table 6-3. Fast ALC Parts List (001-00207 Rev. B) . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

6.7 FSK Remote Control Option (7000RF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

Figure 6-12. FSK Remote Control Jumper Placement . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29

Figure 6-13. FSK Remote Control Component Locations (738232 Rev. D) . . . . . . . . . 6-30

Figure 6-14. FSK Remote Control Schematic Diagram (994162 Rev. C) . . . . . . . . . . . 6-31

Table 6-4. FSK Remote Control Parts List (001-01402 Rev. M) . . . . . . . . . . . . . . . . 6-33

6.8 High-Stability Option (7000HS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-41

Figure 6-15. High Stability Component Locations (738341 Rev. A) . . . . . . . . . . . . . . . 6-42

Figure 6-16. High Stability Schematic Diagram (994487 Rev. A) . . . . . . . . . . . . . . . . . 6-43

Table 6-5. High Stability Parts List (001-01022 Rev. C) . . . . . . . . . . . . . . . . . . . . . . 6-45

6.9 High Stability Fast ALC (7000HS-FALC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-49

Figure 6-17. High Stability Fast ALC Component Locations (738341 Rev. A). . . . . . . 6-50

Figure 6-18. High Stability Fast ALC Schematic Diagram (994074 Rev. A) . . . . . . . . 6-51

Table 6-6. High Stability Fast ALC Parts List (001-01023 Rev. A) . . . . . . . . . . . . . . 6-53

6.10 ISDN Remote Control Option (7000RI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-56

Figure 6-19. ISDN Remote Control Component Placement. . . . . . . . . . . . . . . . . . . . . . 6-57

Figure 6-20. ISDN Remote Control Component Locations (738248 Rev. E) . . . . . . . . 6-58

Figure 6-21. ISDN Remote Control Schematic Diagram (994184 Rev. E) . . . . . . . . . . 6-59

Table 6-7. ISDN Remote Control Parts List (001-01403 Rev. L) . . . . . . . . . . . . . . . . 6-61

6.11 Narrowband CW Filter (7000CW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-68

viii TW7000MS

Figure 6-22. Narrowband CW Component Placement . . . . . . . . . . . . . . . . . . . . . . . . . . 6-68

6.12 Noise Blanker Option (7000NB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-69

Figure 6-23. Noise Blanker Component Locations (738233 Rev. C) . . . . . . . . . . . . . . . 6-70

Figure 6-24. Noise Blanker Schematic Diagram (994163 Rev. B). . . . . . . . . . . . . . . . . 6-71

Table 6-8. Noise Blanker Parts List (001-01202 Rev. E) . . . . . . . . . . . . . . . . . . . . . . 6-73

6.13 Recorder Option (7000RCDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-75

Figure 6-25. Recorder Jumper Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-75

6.14 Selcall, Transcall, TransAdapt Option (7000TC) . . . . . . . . . . . . . . . . . . . . . . . . . 6-76

Figure 6-26. Selcall, Transcall and TransAdapt Component Placement . . . . . . . . . . . . 6-76

6.15 Voice Enhancement Option (7000VEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-77

6.16 Wideband 1 Option (7000WB1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-77

Figure 6-27. Wideband 1 Component Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-78

Chapter 7: System Variations

7.1 Computer Control (TW7000C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2 Extended Front Panel Control (TW7000E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Figure 7-1. TW7000E Connector Transition Component Locations (738256 Rev. C) . 7-2
Figure 7-2. TW7000E Connector Transition Schematic Diagram (994187 Rev. B) . . . 7-3

Table 7-1. TW7000E Connector Transition Parts List (002-01003 Rev. F) . . . . . . . . . 7-5

7.3 Pre/Postselector (TW7000PP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Figure 7-3. TW7000PP Internal Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

Figure 7-4. TW7000PP Cabling Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

7.4 FSK Remote Control (TW7000RF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7.5 ISDN Remote Control (TW7000RI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7.6 Receiver Only (TW7000RX). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7.7 Transmitter Only (TW7000TX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

TW7000MS ix

CHAPTER 1

INTRODUCTION

1.1 The TW7000

The Datron World Communications Inc. (DWC) TW7000 is an advanced HF
transceiver providing a complete range of both voice and data operation over
the entire 1.6 to 30 MHz HF spectrum. The TW7000 uses multiple
microprocessors, direct digital synthesis (DDS), and offers built-in options
such as automatic link establishment (ALE), high-speed data transmission
and encryption.

The TW7000 is part of an overall family of equipment offering a complete
selection of accessories, including power supplies, antenna tuners, high
power amplifiers, data terminal equipment, etc. DWC offers systems using
the TW7000 configured in a variety of ways to solve communication
requirements.

1.2 Transceiver Configurations

The TW7000 is offered in a fixed station package, in a rack mount version
using the DWC rack mount kit, or in a number of remote and extended
control configurations. The front panel of a standard TW7000 can easily be
removed for remote control up to 50 feet from the equipment. Full function,
modem-based remote control heads using either FSK or ISDN signaling
protocols are also available for long distance, 2-wire remote operation.

TW7000MS 1-1

1: Introduction

1.3 Internal Options

The following internal options are available in the TW7000. Chapter 6 is
devoted to these options.

7000ACH Additional channels. Increases operational channel capacity to

7000ALE FED-STD-1045 compatible adaptive system. Provides

7000CLK Internal clock keeps and displays the time and includes alarm

7000CW Narrowband filter with 500 Hz bandwidth for CW operation.

7000ENCR High-level voice encryptor uses enhanced domain transform

7000FALC Fast ALC loop for use with linear amplifiers like the

1000.

complete 1045 capability, including link quality analysis,
auto-linking, sounding, and orderwire message transmission
and reception.

features.

(EDT) ciphering techniques providing long-term security.

TW1000D that utilize peak detection ALC.

7000HS High-stability reference oscillator allows 0.1 parts per million

frequency stability.

7000HS-FALC

High Stability reference oscillator and fast ALC loop
operation.

7000NB Impulse-type noise blanker used in high-noise environments.

7000RCDR Combines receive and transmit audio and routes them to

Accessory 2.

7000RF Internal modem allows remote contact from the TW7201F

FSK controller.

7000RI Internal modem allows remote contact from the TW7201I

ISDN controller.

7000RS Modem interface board configures a second serial port

(RS422/485) to provide data protocol for external control of
the radio through a computer. This is in addition to the
standard RS232 interface.

7000TC Digital selective calling system plus automatic path

evaluation. Combines all functions of Transcall, Selcall, and
TransAdapt.

1-2 TW7000MS

7000VEM DSP-based voice enhancement provides superior voice

7000WB1 Wideband data filter providing 300 to 3300 Hz with tailored

TW7000AIRSELCALL

1.4 TW7000 Variations

This manual provides information necessary to operate any variation of the
TW7000. Options described here may not be available on your transceiver.
For more information about these variations, contact DWC. Chapter 7 is
devoted to these variations.

1: Introduction

recognition and signal-quality improvement in noisy
environments.

group delay characteristics for data operation.

Operating with N-1304A (or equivalent) SELCALL devices
and Datron power amplifiers, it adds a secondary control line
to the radio and allows use of the ICAO-mandated ground-to­air SELCALL 3-tone system.

TW7000C Designed for computer control. A blank front panel replaces

the standard front panel.

TW7000E Designed for extended control use. A line driver panel

replaces the standard front panel. It is used with the TW7201E
control head for remote operation up to 15m (50 ft.).

TW7000PP Allows the addition of the TW5830 Pre/Postselector and

TW5830INST installation kit for co-sited operation.

Note: The TW5830 requires the TW7000 to have both the
TW7000PP and the TW5830INST. The TW7000 is not field
upgradeable to a TW7000PP.

TW7000RF Designed for long distance remote-only use beyond

2 km. A blank front panel replaces the standard front panel.
An internal modem card (7000RF) is installed. For full
function FSK remote control, use with the TW7201F.

TW7000RI Designed for remote-only use up to 2 km. The standard front

panel is replaced with a blank front panel. An internal modem
card (7000RI) is installed. For full function, real time, ISDN
remote control, use with the TW7201I.

TW7000RX Receiver only. It includes the full receiver functions of the

TW7000, excluding transmit features.

TW7000TX Transmitter only. It includes the full transmitter functions of

the TW7000, excluding receiver features.

TW7000MS 1-3

1: Introduction

1.5 Input Power Requirements

The TW7000 is powered from a nominal +12 Vdc. Good performance is
achieved when the input voltage is between the range of 11V and 15.5V.

1.6 Antenna Requirements

The TW7000 has an RF output impedance of 50 ohms and is used with either
broadband or narrowband antennas, in conjunction with an automatic antenna
tuner.

1.7 Accessories

The TW7000 interfaces with a variety of accessory equipment to create
systems to meet the most complex of communication requirements. For more
information on accessories, refer to the "Accessory Connections" section on

page 2-4.

1.8 Technical Specifications

Note: Specifications are subject to change without notice or obligation.

Characteristic Specification

General

Frequency Range 1.6 to 30 MHz (TX); 100 Hz to 30 MHz (RX);

10 Hz channel spacing

Preset Channels 256 standard, 1000 optional

Scanning Multiple scan groups, operator selectable scan

rates

Channel
Programming

Frequency Stability 0.5 ppm

Modes USB, LSB, CW, AME; simplex or half-duplex

Input Power 11 to 15.5 Vdc

Input Power
Protection

Antenna Port SO-239

Antennas 50 ohms or automatic antenna tuner (AT7000,

From front panel or remotely via computer or
dedicated remote control console

Reverse polarity, transient and under/over voltage

RAT1000C)

Interface Control: two RS32 COM ports; compatible with

EIA RS422/423/485 with option.
Audio: 600 ohms, balanced and isolated

1-4 TW7000MS

1: Introduction

Characteristic Specification

Mechanical, Environmental

Size (H x W x D) 3.5 in. x 13 in. x 17 in.

(8.9 cm x 33 cm x 43 cm)

Weight 21 lbs. (9.5 kg)

Cooling On-demand fan (internal)

Temperature -30°C to +60°C, operating

Shock, Vibration Per MIL-STD-819

Transmitter

RF Power Output 125W PEP, 100W average

Duty Cycle Continuous service, all modes

Harmonics -60 dB (2 to 30 MHz) nominally

Receiver

Sensitivity 10 dB SINAD for 0.5µV input (2 to 30 MHz)

Attenuator +20 dB, operator switchable

Audio 5W into 4 ohm; 0 dBm into 600 ohms

1.9 Referenced Manuals

• TW7000 Operator Manual (TW7000-MSOP)

• 7000ALE Radio Control Program Operator Manual (7000ALE-MSOP)

• 7000-Series Encryption Operator Manual (7000ENCR-MSOP)

• TW7201I ISDN Remote Control Head Technical Manual (TW7201I-MS)

• TW7201F FSK Remote Control Head Technical Manual (TW7201F-MS)

TW7000MS 1-5

CHAPTER 2

INSTALLATION

2.1 Unpacking and Inspection

When unpacking the TW7000, carefully remove the equipment from its
container and inspect it for any possible damage. If anything is damaged, notify
DWC.

Check the equipment against the packing list. Save the original container and
packing materials for storage or reshipping purposes.

2.2 Preinstallation Check

The TW7000 is completely aligned and tested prior to shipment. However, to
insure proper functioning prior to installation, perform an operations check. For
more information, refer to the "Basic Performance Test" section on page 5-8.

2.3 Location Considerations

The TW7000 can be deployed successfully in various locations, in a number of
different configurations, depending on whether remote or extended control is
used. Information in this section pertains to the main body of the TW7000,
whether it is controlled locally or from a remote site.

2.3.1
Fixed Station Unless otherwise specified when ordered, the TW7000 is shipped ready for

operation. It is also available for mounting in a rack, provided the appropriate
rack kit is ordered.

Make sure the temperature at the location is within the specified range, and that
there is adequate ventilation around the rear of the TW7000 to allow for air
flow. The TW7000 uses an on-demand fan for cooling the internal heat sink
during periods of prolonged transmit operation. The intake and exhaust vents
for this fan are located on the rear panel. Provide sufficient space during
installation for the cooling air to circulate properly.

To prevent unwanted noise, locate the TW7000 as far away as possible from
electrostatic and magnetic field-generating equipment.

When attaching external cables to the TW7000, allow for sufficient slack in the
cables. This prevents damage from sharp bends and ensures easy disconnection.

TW7000MS 2-1

2: Installation

2.3.2
Vehicular or

Marine

To operate the TW7000 in a particular vehicle or shipboard location, DWC
offers rack, mobile and shock mount kits suitable for most installations.

2.4 Front Panel Connections

Two 6-pin microphone connectors on the front panel are wired in parallel and
suitable for use by various audio accessories. Low-level audio accessories for
use with the TW7000 include the following:

Part Number Description

PM Heavy-duty palm microphone
DM Dynamic desk microphone
KEY Morse key
EP Headphones
EPL Lightweight headphones

The input impedance is a nominal 150 ohm. Most dynamic, ceramic, or
magnetic microphones operate satisfactorily with the TW7000. All DWC­supplied audio accessories have the correct mating connector on them. To use
other low-level audio accessories, the correct mating connector can be
obtained from DWC. The pin assignments for the two connectors are as
follows:

Pin Number Description

1 Ground

2 RX audio (unmuted)

3PTT

4 TX audio

5 CW key line

6 +12 Vdc

2.5 Rear Panel Connections

The rear panel of the TW7000 is fabricated from aluminum sheet metal and
attached to the rear panel bezel by 6 screws. The pattern of punched holes on
right-side is the air intake for the internal heat sink. The left-side hole pattern

2-2 TW7000MS

2: Installation

is the air exhaust. Between them are the rear panel connectors and the fuse
holder. Behind the panel is an input power protection circuit board. Ribbon
cables connect the rear panel to the motherboard.

2.5.1
Power to the

TW7000

Accessory 3

Accessory 2

Accessory 1

Antenna

Input Power

Ground Remote

Figure 2-1. TW7000 Rear Panel

Input power is nominally 13.8 Vdc, with a maximum current requirement of
approximately 25A. The recommended operational voltage range of the
TW7000 is 11 to 15.5 Vdc. The 12VDC INPUT connector on the rear panel is
a 2 pin 25A circular receptacle having a square mounting flange with 2 male
pins. The mating plug is attached to the input DC power cable (C991829)
supplied with the TW7000. This cable has two 12 AWG conductors, is 6.5 ft.
long, and open-ended for convenient connection to a variety of +12 Vdc
sources. For specific connections, refer to the "Power Cabling Accessories"

figure on page 2-12.

The pin assignments for the input power connector are as follows:

Pin Number Description

1 12 Vdc return (ground)

2 12 Vdc

The DC power connection between the TW7000 and its power source should
be as short as possible. If a DWC power cable is not available, use a 14 AWG
cable for runs up to 3 feet, a 12 AWG cable for runs to 9 feet, or a 10 AWG
cable for longer runs.

TW7000MS 2-3

2: Installation

2.5.2
Antenna

Connection

Three DC power supplies, available from DWC, are recommended for use
with the TW7000 when a +12 Vdc primary power source is not available.

PS7000: Voice duty cycle supply. Operates from either 110 or 220 VAC
(strapable), 50/60 Hz, and designed for non-continuous duty operation.
Connects to the TW7000 using cable C991829.

PF7000: Heavy duty FSK power supply permits continuous duty operation.
Runs off 110/220 VAC, 50/60 Hz, with universal input. It requires a C991879
cable.

PF3000: Heavy duty power supply permits continuous duty operation. Runs
off 110/220 VAC, 50/60 Hz, with switchable input range. Requires a C991829
cable.

The fuse holder (pin 346877) on the rear panel contains a 25A, 3-AG fuse, and
a spare fuse of the same value.

The TW7000 is designed to work into a 50 ohm RF impedance. The output
RF antenna connector is a type SO-239 connector. Broadband antennas and
dipoles can be connected directly to this output, while high-power amplifiers
and antenna tuners use specially-designed DWC cables. For specific
connections, refer to the "RF Cabling Accessories" figure on page 2-13.

2.5.3
Accessory

Connections

A variety of external accessories are available from DWC for use with the
TW7000. For some of these accessories and their control cabling, refer to the

"Control Cabling Accessories" figure on page 2-14. For more information on

any individual accessory, refer to the manual for that piece of equipment.

There are three accessory connectors on the rear panel, each with different pin
assignments. If multiple accessories are required that share one or more of the
accessory connectors, an external accessory combiner box (TW7000IOX) can
be attached to any of these connectors. Each of the three connectors on the
rear panel is a D-Submini socket with 25 pins. For the location of these
connectors, refer to the "TW7000 Rear Panel" figure on page 2-3.

2-4 TW7000MS

Table 2-1. Pinouts for Accessory Connector 1

Pin Number Description

1 Ground

2 COM1RXD (RX data)

3 COM1CTS (clear to send)

4 COM1TXD (TX data)

5 COM1RTS (ready to send)

6 BALRXA1 (balanced RX audio)

7 BALRXA2 (balanced RX audio)

8 BALTXA1 (balanced TX audio)

9 BALTXA2 (balanced TX audio)

10 AUXPTT\

11 Select

12 Busy

13 +12V ACC

2: Installation

14 EXTCWKEY (external CW key)

15 Strobe

16 Data 0

17 Data 1

18 Data 2

19 Data 3

20 Data 4

21 Data 5

22 Data 6

23 Data 7

24 ACK (acknowledge)

25 DI/OSEL

TW7000MS 2-5

2: Installation

Table 2-2. Pinouts for Accessory Connector 2

Pin Number Description

1 Ground

2 Ground

3PWRON\

4 ATUINIT (tune initiate)

5 ATUKEY\ (tuner key line)

6 BALRXA3 (balanced RX audio)

7 BALRXA4 (balanced RX audio)

8 BALTXA3 (balanced TX audio)

9 BALTXA4 (balanced TX audio)

10 AUXPTT\

11 COM2RXD COM2 (RX data)

12 COM2TXD COM2 (TX data)

13 +12V ACC

14 EXTCWKEY (external CW key)

15 Spare

16 ACHKTUNE (tuner check tune)

17 ADATA (tuner data)

18 ACLOCK (tuner clock)

19 ASTROBE (tuner strobe)

20 TC/SCALM (alarm)

21 RETX\ (retransmit)

22 EXTSPKR (speaker audio)

23 SQA (squelch audio)

24 +12V ACC

25 +12V ACC

2-6 TW7000MS

Table 2-3. Pinouts for Accessory Connector 3

Pin Number Description

1 Ground

2 Ground

3FILTG\

4 AMPALC (external amplifier ALC line)

5 AMPPTT\ (external amplifier PTT line)

6 FLTA (low-pass filter select lines)

7 FLTB (low-pass filter select lines)

8 FLTC (low-pass filter select lines)

9 FLTD (low-pass filter select lines)

10 FLTE (low-pass filter select lines)

11 FLTF (low-pass filter select lines)

12 FLTG (low-pass filter select lines)

13 +5V

2: Installation

External
Encryption

14 Ground

15 Ground

16 EXTCLK (external clock)

17 EXTRXD (external RX data)

18 EXTTXD (external TX data)

19 ATURX (tuner RX data)

20 ATUTX (tuner TX data)

21 EXTEN1

22 EXTEN2

23 EXTIN1

24 +12V ACC

25 +12V ACC

The TW7000 has provision for an embedded encryption board, the
7000ENCR option. External encryption can also be used with the TW7000
and connected to Accessory 1 or Accessory 2 using the following pins:

TW7000MS 2-7

2: Installation

Pin Number Description

1 Ground

6 BALRXA3 (balanced RX audio)

7 BALRXA4 (balanced RX audio)

8 BALTXA3 (balanced TX audio)

9 BALTXA4 (balanced TX audio)

10 AUXPTT/

13 +12V ACC

Telephone
Couplers

EIA Data
Interface
Standards

Telephone couplers like the TW5810 or TW5850 use either Accessory 1 or
Accessory 2. The appropriate pins are as follows:

Pin Number Description

1 Ground

6 BALRXA3 (balanced RX audio)

7 BALRXA4 (balanced RX audio)

8 BALTXA3 (balanced TX audio)

9 BALTXA4 (balanced TX audio)

10 AUXPTT\

13 +12V ACC

The TW7000 interfaces with a variety of data communications equipment
(DCE) or data terminal equipment (DTE) using EIA standards RS232, RS422
or RS485. Accessory 1 is configured to provide the standard I/O port (COM1)
for these interfaces. The RS232 protocol is standard; all others are optional. It
is necessary to order the 7000RS option and to specify the required protocol
so the appropriate interface chip is inserted into the processor. Pins on
Accessory 1 are:

Pin Number Description

1 Ground

2 COM1RXD (RS422/RS485)

3 COM1CTS (comport 1 clear-to-send)

4 COM1TXD (RS422/RS485)

5 COM1RTS (comport 1 request-to-send)

If the 7000RS option is installed, the COM1TXD and COM2RXD becomes a
2-wire bidirectional RS422/485 interface.

2-8 TW7000MS

2: Installation

A 3-wire RS232 interface is also available on Accessory 2. Pins on Accessory
2 are:

Pin Number Description

1 Ground

11 COM2RXD

12 COM2TXD

Automatic
Antenna Tuners

The TW7000 interfaces with the complete line of DWC automatic antenna
tuners. This includes the older AT100 and RAT100 as well as the newer
AT7000B, RAT7000B and RAT1000C.

The AT100, RAT100 and RAT1000C connect to Accessory 2 using the
following pins:

Pin Number Description

1 Ground

2 Ground

4 ANUINIT (tune initiate)

5 ATUKEY\

16 ACHKTUNE (tuner check tune)

17 ADATA (tuner data)

18 ACLOCK (tuner clock)

19 ASTROBE (tuner strobe)

24 +12V ACC

The AT7000B and RAT7000B uses Accessory 3 with the following pins:

Pin Number Description

14 Ground

15 Ground

19 ATURX (tuner RX data)

20 ATURX (tuner RX data)

24 +12V ACC

25 +12V ACC

TW7000MS 2-9

2: Installation

Data Terminal
Interface

The TW7000 interfaces with its own line of data terminals or to other external
units using Accessory 1. Pins on Accessory 1 are:

Pin Number Description

1 Ground

2 COM1RXD (RS422/RS485)

4 COM1TXD (RS422/RS485)

6 BALRXA1 (balanced RX audio)

7 BALRXA2 (balanced RX audio)

8 BALTXA1 (balanced TX audio)

9 BALTXA2 (balanced TX audio)

10 AUXPTT\

14 EXTCWKEY (external CW key)

External Printers A standard parallel printer connects to Accessory 1 to obtain a hard copy of

text messages stored in the TW7000. Pins on Accessory 1 are as follows:

Pin Number Description

1 Ground

ALE/Transcall/
Selcall Alarm

11 Select

12 Busy

15 Strobe

16 Data 0

17 Data 1

18 Data 2

19 Data 3

20 Data 4

21 Data 5

22 Data 6

23 Data 7

24 ACK (acknowledge)

The external ALE/Transcall/Selcall alarm driver is available on Accessory 2
using the following pins:

Pin Number Description

14 EXTCWKEY

20 TC/SCALM (alarm)

2-10 TW7000MS

2: Installation

External Speaker An external speaker attaches to the TW7000 at Accessory 2 using the

following pins:

Pin Number Description

1 Ground

22 EXTSPKR (speaker audio)

External High­Power Amplifiers

The TW7000 interfaces with all existing DWC high-power RF booster
amplifiers using Accessory 3 with the following pins:

Pin Number Description

1 Ground

2 Ground

3FILTG\

4 AMPALC (external amplifier ALC line)

5AMPPTT\

6 FLTA (low-pass filter select line)

7 FLTB (low-pass filter select line)

8 FLTC (low-pass filter select line)

9 FLTD (low-pass filter select line)

10 FLTE (low-pass filter select line)

11 FLTF (low-pass filter select line)

12 FLTG (low-pass filter select line)

TW7000MS 2-11

2: Installation

Figure 2-2. Power Cabling Accessories

2-12 TW7000MS

AT7 000 B

2: Installation

C991559

C991620

To Front

Panel

Connector

RAT1000C

DC

IN

RF

REMOTE

ACC#3

ACC#2

ACC#1

C991507

C991539

F1 F2

C991505

GND

TW1000D

RF

RF

IN

OUT

C991505

OUT

IN

C991539

TW500D

RF

GND

RF

OUT

IN

F1 F2

OUT

IN

Figure 2-3. RF Cabling Accessories

TW7000MS 2-13

2: Installation

To Fro n t

Panel

Connector

AT7000B

C991938

C991552

RAT1000C

ACC#3

DC

IN

RF

TW7000

REMOTE

ACC#2

ACC#1

C991906

C992216

TW1000D

RAT1000P

TW7201

ACC#1

ACC#2

C991830

C992094 C991964

C992307

REMOTE

TW7201E

REMOTE

C991897

DC

IN

C992216

TW5300

C992161

TW5810

TW5850

F1 F2

OUT

IN

F1 F2

OUT

IN

C992361 C992377

DT5300 DT110DT9400

GND

GND

RF

IN

TW500D

RF

IN

RF

OUT

OUT

RF

Figure 2-4. Control Cabling Accessories

2-14 TW7000MS

2: Installation

2.5.4
Remote Control The TW7000 can be controlled remotely using a computer, an extended front

panel, or a remote control head.

Computer
Control

Extended Front
Panel Control

FSK and ISDN
Remote Control

You can control the TW7000 remotely from a standard computer using
Accessory connectors 1 or 2 on the rear panel. A custom software program is
available from Datron that runs on any PC using Windows™. For the
connections to use, refer to the "EIA Data Interface Standards" section on

page 2-8.

You can remove the front panel of the TW7000 from the body of the TW7000
and replace it with a line driver panel (TW7000E) to control it remotely. This
special version of the radio is used to control operations from distances up to
50 feet.

You can control the TW7000 remotely from longer distances using the
TW7201F and the TW7201I remote control heads. Both control heads require
that you install modem interface boards (7000RF or 7000RI) inside the
TW7000. The TW7201F uses FSK and is for long-range remote requirements,
while the TW7201I uses ISDN and is for real-time control up to 2 km.

These modem-based remote control units connect to the TW7000 via the
remote connector on the rear panel. This connector is a circular MIL-C 10
with 9 pins.

Pin Number Description Remote Head

1 Ground FSK, ISDN

2 +12V UNREG FSK, ISDN

3 +12V ACC

4 Spare (REMSP)

5ISDN1 ISDN

6ISDN2 ISDN

7REMRXA FSK

8REMTXA FSK

9 PWRON\ FSK, ISDN

For a complete description of these pins, refer to the TW7201F FSK Remote
Control Head (TW7201F-MS) technical manual or the TW7201I ISDN
Remote Control Head (TW7201I-MS) technical manual.

TW7000MS 2-15

CHAPTER 3

THEORY OF OPERATION

This chapter describes the functional operation of the system from the
viewpoint of power distribution, frequency generation, receive and transmit
paths, and control signals. Operating principles of the individual boards and
subassemblies explain functional behavior only.

3.1 Transceiver Boards

A total of twenty boards can occupy the TW7000 including standard boards
and option boards. Many of these boards occupy plug-in slots that can be
easily intalled and serviced. For the location of these boards, refer to the

"Board Locations" figure on page 5-3.

Most of the wiring between assemblies in the TW7000 is on the motherboard;
there is no harnessing. Other connections between the individual boards, front
and rear panel controls, and connectors, are made using a combination of
coaxial cable and ribbon cable assemblies.

For more information on these boards, refer to the "System Diagram" figure

on page 3-3.

3.2 Power Distribution

Figure 4-2 and Table 4-1 explain the power distribution in the TW7000. The
TW7000 receives its primary power via the 12/28VDC INPUT connector on
the rear panel. This power is routed to the Power Supply board and enters
connector J26. The PWRON line from the front panel (J21-7) activates a relay
on the board, turning the TW7000 on and allowing the distribution of power
to the other subassemblies. Voltages derived from the primary +12 Vdc input
include the following:

Voltage Description

+12V PA Unregulated, unswitched, raw input power to the RF

+12V
UNREG

+12V ACC Regulated, switched, filtered +12 Vdc provides power to

Power Amplifier board

Unregulated, switched input power to the front panel
assembly and the remote control devices via the
REMOTE rear panel connector

all of the rear panel connectors

TW7000MS 3-1

3: Theory of Operation

Voltage Description

+12V FAN Unregulated, switched, filtered +12 Vdc drives the heat

+12V Regulated, switched, filtered +12 Vdc provides power to

+5V Regulated, switched, filtered +5 Vdc for the Processor

sink fan

all internal subassemblies in the TW7000 except the front
panel

board, accessory 3 connector, and the ALE option slot

3-2 TW7000MS

Audio

3: Theory of Operation

Keypad

Squelch

001-00600

001-01200

001-00800

5 MHz IF

001-00710

75 MHz IF

Amplifier

RF Filter Power

001-00901

Synthesizer

HS Option

Control

(

001-01022)

001-00206

Reference/

Keypad

001-00130

Assembly

Microphone

Control

Signals

FP

001-01100

Processor

+5V

+12V

+12V PA

+12V UNREG

+12V ACC

Processor

001-00143

Switch

Front Panel

Assembly

Controls

Front Panel

Speaker

VSWR

Antenna

001-00201 001-00320 001-00310

Power

Supply

001-00410

12 Vdc Input

LCD

Display

Drivers

001-00121

Figure 3-1. System Diagram

TW7000MS 3-3

PWRON

J21-7

12 Vdc Input

1

2+

3

Fuse

25A

+12V Fan

Fan

J26-1 1

J26-2

J26-3

+12 VPA

GRD

+12V ACC

+12V UNREG

+12V

+5V

GRD

J24-2

J24-1

E2

E1

J20-6, 7, 18, 19

J20-9, 10, 21, 22

J20-4, 5, 16, 17

J20-12, 13, 24, 25

J20-1, 2, 3, 14, 15

J21-1, 14

2

Power Supply

001-00410

Figure 3-2. Power Distribution Diagram

3-4 TW7000MS

3: Theory of Operation

Table 3-1. Transceiver Power Distribution

Voltage Distribution Connector

+12V PA RF Power Amplifier board

+12V ACC Rear panel assembly

Remote Pin 3

Accessory 1 Pin 13

Accessory 2 Pins 13, 24, 25

Accessory 3 Pins 24, 25

+12V UNREG Front panel assembly J1-3, 4

Rear panel assembly

Remote Pin 2

+12V Processor board J14-A31, B31; J15-A31, B31

Reference/control board J3-2

RF Filter board J22-3, 4

Synthesizer board J4-2, 15

75 MHz IF board J6-2, 15

5 MHz IF board J5-2, 15

Audio board J7-2, 15

ECU/RCU board J11-2, 15

ALE board J13-2, 15

Option slot 1 J9-2, 15

Option slot 2 J10-2, 15

Noise Blanker/FM board J2-2, 15

+5V Rear panel assembly

Accessory 3 Pin 13

Processor board J15-A29, A30, B29, B30

ALE board J13-6, 18

PWRON Front panel assembly J1-26

Rear panel assembly

Remote Pin 9

Accessory 2 Pin 3

TW7000MS 3-5

3: Theory of Operation

d

(J59)

75 MHz IF Board

5 MHz IF Board

(J54)

5 MHz IF Boar

(J55)

J59

1st LO

Reference

J61

J61

Reference

J54

2nd LO

+12V

J4-2, 15

J55

Ground

J4-1, 14

3rd LO

Board

001-00901

Synthesizer

Board

001-00206

+12V

J3-2

Ground

J3-1

Reference/Control

Figure 3-3. Transceiver Frequency Generation

3-6 TW7000MS

3: Theory of Operation

MH

IF B

d

Audio

Transceiver

3rd LO (BFO)

oar

z

5

(5.000-5.0036 MHz)

75 MHz IF Board

Channel

Transceiver

Frequency

(.1-30 MHz)

2nd LO

(70 MHz)

1st LO

(RX: 75-105 MHz)

(TX: 76.6-105 MHz)

Figure 3-4. Transceiver Frequency Mixing Schematic

TW7000MS 3-7

3: Theory of Operation

3.3 Frequency Generation

For a diagram of the boards used in frequency generation, refer to the

"Transceiver Frequency Mixing Schematic" figure on page 3-7. All

frequencies are tied to the reference oscillator located in the Reference/
Control board. This oscillator has a frequency of 16.777216 MHz, and
connects between the Reference/Control and Synthesizer boards via an
internal coaxial cable (J61 on both boards). The synthesizer takes the
reference frequency input and generates the three local oscillator (LO) output
frequencies in the TW7000 mixing scheme. These are as follows:

Frequency Value Level

First LO 75.1 to 105 MHz

0 dBm ± 2 dB (50 ohm)

(10 Hz steps)

Second LO ≈ 70 MHz 0 dBm ± 2 dB (50 ohm)

Third LO 5.000 MHz (LSB, voice)

0 dBm ± 2 dB (50 ohm)

5.003 MHz (USB, voice)

5.0036 MHz (USB, data)

These LO frequencies result in intermediate frequencies (IF) of 75 MHz and
5 MHz. The beat frequency oscillator (BFO) has different values depending
on the mode selected. This allows the use of only one sideband filter instead
of the usual two (USB and LSB), giving the transceiver both modes as
standard equipment. The third value of BFO (5.0036 MHz) is for USB
operation when the optional wideband data filter is installed. The first LO is
offset by 3 kHz in USB mode with the standard voice-grade filter, and by

3.6 kHz in USB mode with the optional data-grade filter. A few examples:

Channel frequency = 1.6 MHz, USB, voice, 1 kHz modulation

First LO = 75 MHz + channel frequency + 3 kHz

= 75 MHz + 1.6 MHz + 3kHz

= 76.603 MHz

First IF = First LO - input frequency

= 76.603 MHz - (1.6 MHz + 1 kHz)

= 75.002 MHz

Second IF = First IF - second LO

= 75.002 MHz - 70 MHz

= 5.002 MHz

Output
Audio

= BFO - second IF

= 5.003 MHz - 5.002 MHz

= 1 kHz

3-8 TW7000MS

3: Theory of Operation

Channel frequency = 1.6 MHz, LSB, voice, 1 kHz modulation

First LO = 75 MHz + channel frequency

= 76.6 MHz

First IF = 76.6 MHz - (1.6 MHz - 1 kHz)

= 75.001 MHz

Second IF = 75.001 MHz - 70 MHz

= 5.001 MHz

Output
Audio

Channel frequency = 1.6 MHz, USB, data, 1 kHz modulation

First LO = 76.6036 MHz

First IF = 75.0026 MHz

Second IF = 5.0026 MHz

Channel frequency = 1.6 MHz, USB, data, 1 kHz modulation

Output
Audio

3.4 Receiver Signal Flow

For a block diagram of the receive path in the TW7000, refer to the

"Transceiver Receive Path Diagram" figure on page 3-11. The receive signal

(channel frequency) enters the radio via the 50 ohm antenna connector on the
rear panel, passes through the VSWR board (E4), and goes to the RF Filter
board at J50. In the RF Filter board, the signal is low-pass filtered before
exiting and going to the 75 MHz IF board at J52.

= BFO - second IF

= 5.000 MHz - 5.001 MHz

= -1 kHz

= BFO - second IF

= 5.0036 - 5.0026

= 1 kHz

In the 75 MHz IF board, the channel frequency is mixed with the first LO to
form the first IF at 75 MHz, then filtered and amplified before going to the 5
MHz IF board at J53. The signal is mixed with the fixed 70 MHz second LO
to obtain the second IF at 5 MHz, then filtered, amplified, and mixed with the
third LO (BFO) to get to baseband audio.

The demodulated audio (DEMODA) exits the 5 MHz IF at J5-21 and goes to
the Audio board (J8-21). In the Audio board, audio is processed, passed
through the squelch gate, and sent out as unbalanced squelched audio via J8-7
to the front panel (J1-30) to drive the speaker, or to Accessory 2 (pin 22).
Unbalanced squelched audio is provided at J8-6, J18-19 to both accessory 2
and accessory 3 (pins 6 and 13) connectors.

TW7000MS 3-9

3: Theory of Operation

The Squelch is a syllabic squelch circuit that interfaces with the Audio board.
The squelch circuit is activated via a signal from the Processor board and is
controlled by the squelch on/off switch on the front panel. The receiver’s
automatic gain control (AGC) is generated and the threshold set in the 5 MHz
IF board.

3-10 TW7000MS

3: Theory of Operation

M

HzI

F

A

(

)

75

(001-00710)

RF Filter

(001-00320)

J53

J52

J52

J50

75 MHz IF

RX RF

RX RF

ANT RF

1st

LO

J59

J53J5-21J8-21

75 MHz IF

5 MHz IF

(001-00800)

DEMODA

DEMODASQA

Audio

(001-00600)

J8-7

BALRXA 1, 2

BALRXA 3, 4

J8 11, 24

J8 6, 19

LO

2nd

J54

J55

LO

3rd

Squelch

J8-23

RRXA

J8-17

RRXA

J8-4

J14-A22

J15-B26

J14-A26

Processor

001-01101

ANT RF

VSWR

(001-00201)

J49 J50

Accessory 2 (Z, a)

ANT

Accessory 1 (Z, a)

Front Panel (J1-20)

ntenna

Figure 3-5. Transceiver Receive Path Diagram

TW7000MS 3-11

3: Theory of Operation

3.5 Transmit Signal Flow

For a diagram of the transceiver transmit path, refer to the "Transceiver

Transmit Path" figure on page 3-13. Primary unbalanced audio comes from

the microphone connectors on the front panel (J1-25) and is routed to the
Audio board at J8-20. Balanced 600 ohm audio is obtained from accessory 1
or 2 (pins 15, 17), and enters the Audio board at J8-5,18. Modulated audio
(MODA) is sent to the 5 MHz IF board where it is mixed with the third LO
(BFO) to form the IF at 5 MHz. It is filtered and amplified, then mixed with
the second LO to form the IF at 75 MHz before routed to the 75-MHz IF
board. The signal is amplified and filtered, and mixed with the first LO to
form the low-level TX channel frequency RF. It is amplified again in the TX
exciter circuitry before sent to the RF power amplifier.

In the power amplifier, the signal is amplified to its final output power level
and routed to the RF Filter board. The RF Filter board provides the necessary
harmonic filtering before the signal reaches the antenna port. Just prior to this,
the signal passes through the VSWR circuit where it is sampled by a forward
and reflected power detector. These RF samples are fed back to the Reference/
Control board where they are processed to make up the transmitter automatic
level control (ALC) circuit and VSWR measurement. The raw ALC voltage is
sent back to the 75 MHz IF board where it controls the gain of the low-level
exciter amplifier.

3.6 Receive and Transmit Path Subassemblies

Standard subassemblies in the receive/transmit path include the following:

• VSWR circuit

• RF Filter board

• RF Power Amplifier board

• 75 MHz IF board

• 5 MHz IF board

• Audio board

• Squelch board

3-12 TW7000MS

3: Theory of Operation

A

J53

(LOW)

(LOW)

(HI)

(HI)

LO
1st

J59

J6-12

RAWALC

J3-12

75 MHz IF

75 MHz IF

(001-00710)

RF Amplifier

(12V 001-00310)

TX RF

TX RF

TX RF

J12 J10 J60

TX RF

5 MHz IF

Audio Board

(001-00800)

(001-00600)

J53J5-8

J54

LO

75 MHz IF

MODA

J8-8

PRIMICA

J8-20

2nd

J55

LO

3rd

BALTXA 1,2

BALTXA 3,4

J8 12,25

J8 5,18

Control

RF Filter

(001-00320)

ANT RF

J50 J51

J50

ANT RF

VSWR

(001-00201)

ANT RF

J49

Reference/

J3-14

J3-15

FWDPWR

REVPWR

J19-3 J19-2

001-00206

1,2 (15,17)

Accessories

Front Panel (J1-25)

ntenna

Figure 3-6. Transceiver Transmit Path

TW7000MS 3-13

3: Theory of Operation

3.7 Transceiver Control Path

The transceiver is controlled by two microprocessors: the main controller on the
Processor board, and a secondary controller in the front panel assembly. The
secondary controller processes all of the commands from the front panel such as
clarifier, volume, switch closures, and keypad entry. It relays them to the main
processor to initiate the appropriate action in the radio. The main processor
controls all radio operation and processes any commands received from the rear
panel accessory connectors. For more information regarding the main
processor, refer to the "Processor Board" section on page 4-132.

3.8 Mainframe

The mainframe schematic that follows displays all of the interconnect wiring
between the front panel, rear panel, and motherboard. This schematic traces
signals between assemblies. Most signal lines have arrows that help determine
the direction of the signal flow.

3-14 TW7000MS

01-15-93

03-11-93

03-22-93

04-22-93

RELEASE

J16-2 WAS GND

ADD SQ & DSP

REV OPTION MODULE

7000-017

7000-093

7000-037

7000-044

ABCDEFGHJ

REV ECN DESCRIPTION DATE APPR

ACCESSORY 2ACCESSORY 1

K

11

Rev:

Sheet of

3030 Enterprise Ct.

Vista, CA 92083

08-90-93

10-15-93

01-14-94

08-10-95

08-22-96

12VDC

ANT RF

J50

ENABLES

CLOSURE

FILTER BAND G

ACCESSORY 3

GND

AMPALC

FILTG

FLTA

FLTB

FLTC

FLTD

FLTE

FLTF

FLTG

+5V

GND

EXTCLK

EXTRXD

EXTTXD

ATURX

ATUTX

EXTEN1

EXTEN2

EXTIN1

+12VACC

ADDED TW7000C CONN.

ADD AMP28V

ISOLATE AUDIO DEL 28V

SEE ECN

DEL -9V

7000-070

7000-091

7000-124

7000-209

7000-254

K 03-0099 SEE ECO 07-29-04BB

J15-B1, B32
J15-A1, A32
J14-B1, B32

J14-A1, A32

J15-A28, B28

+12VACC

+12VACC

SQA

EXTSPKR

RETX

TC/SCALM

ASTROBE

ACLOCK

ADATA

ACHKTUNE

SPARE

EXTCWKEY

+12VACC

COM2TXD

COM2RXD

AUXPTT

BALTXA4

BALTXA3

BALRXA4

BALRXA3

ATUKEY

ATUINIT

PWRON

GND

GND

DI/OSEL

ACK

DATA7

DATA6

DATA5

DATA4

DATA3

DATA2

DATA1

DATA0

STROBE

EXTCWKEY

+12VACC

BUSY

SELECT

AUXPTT

BALTXA2

BALTXA1

BALRXA2

BALRXA1

COM1RTS

COM1TXD

COM1CTS

COM1RXD

GND

N/C

26

24

25

22

24

20

23

18

22

16

21

14

20

12

19

10

18

8

17

6

16

4

15

2

14

25

13

23

12

21

11

19

10

17

9

15

8

13

7

11

6

9

5

7

4

5

3

3

2

1

1

J17

N/C

26

24

25

22

24

20

23

18

22

16

21

14

20

12

19

10

18

8

17

6

16

4

15

2

14

25

13

23

12

21

11

19

10

17

9

15

8

13

7

11

6

9

5

7

4

5

3

3

2

1

1

J16

J15-A30, B30

J15-A29, B29

J15-A31, B31

J14-A31, B31

J15-A18

J15-B19

J15-A3

J15-B4

J15-B5

J15-A5

J15-A20

J15-A17

J15-B18

J15-A4

J15-A21

J15-A9

J15-A8

J25-B25

J15-A25

J15-B25

J15-A24

J15-B23

J15-A23

J15-B22

J15-A22

J15-B8

J15-B10

J15-B9

J15-B11

J15-B6

J15-A6

J15-B7

J15-A7

GND

FWDPWR

RVSPWR

321

J19

EN8

J14-B9

FILTG

J15-A16

AMPPTT

J15-B15

EXTCLK

J15-B16

EXTRXD

J15-A15

EXTTXD

J15-A14

ATURX

J15-B14

ATUTX

J15-A13

EXTEN1

J15-B3

EXTEN2

J15-A2

EXTINT

J15-B2

EXTBITE

J14-A12

RVSPWR

J14-A11

VSWRALM

J14-B20

PWRLVL

J14-A20

EN7

J14-A2

EN10

J14-B2

EN11

J14-B6

EN5

J14-B5

EN4

J14-A4

EN3

J14-B4

EN2

J14-A3

EN1

PROCESSOR MODULE

J14-B3

ALCLVL

J14-B18

AGC

GND

SPARE 1

RETX

ADATA

BUSY

SELECT

AUXPTT

FPRXD

J14-A19

J14-B19

J14-B10

EN6

J14-A5

TSENSE

J15-A11

ALETXD

J14-B10

ALERXD

J14-A10

EN13

J14-A8

TC/SCALM

ASTROBE

ACLOCK

OPTTXD

J14-B16

ACHKTUNE

OPTRXD

J14-A16

SPIRXD

J14-B15

EXTCWKEY

SPITXD

J14-B14

SPICLK

J14-B13

COM2TXD

COM2RXD

ENCRPTTO

J14-B17

ENCRPTTI

J14-A17

BITE

J14-B12

PTT

J14-B11

ATUKEY

ATUINIT

EN9

J14-A6

DSPPRXA

J15-B26

DSPRRXA

J15-A26

DSPPTXA

J15-B27

DSPRTXA

J15-A27

SQUELCH

J14-A22

CWKEY

J14-B23

TCRXA1

J14-A23

TCTXAO

J14-B24

STROBE

EN15

J14-B7

EN14

J14-A7

RMTTXD

J14-B25

RMTRXD

J14-A24

SER2RXD

J14-A25

SER2TXD

J14-B26

SER1RXD

J14-A26

COM1RTS

SER1TXD

J14-B27

COM1TXD

EN12

J14-B8

COM1CTS

SYNC

J14-A27

COM1RXD

RMTWR

J14-B28

RMTCLK

J14-A28

RMTDATA

J14-B29

RMTA2

J14-A29

FPTXD

RMTA1

J14-B30

RMTA0

J14-A30

123456789

J25

13579111315171921232524681012141618202224

GND

GND

FILTG

EN8

J21-13

FILTG

J21-25

AMPPTT

J21-23

EXTCLK

J21-12

EXTRXD

J21-11

EXTTXD

J21-10

ATURX

J21-22

J21-9

EXTEN1

J21-21

EXTEN2

J21-8

EXTIN1

J21-20

RVSPWR

J3-14

FWRPWR

J3-15

VSWRALM

J3-11

PWRLVL

J3-23

EN7

J3-13

REF/CTRL

MODULE

EN10

J3-25

PTT

+12V

GND

REF

J3-5

SPICLK

J3-4

J3-2

J3-1

J61

J61

J4-4

EN5

J4-11

REF

EN4

J4-24

SPICLK

EN3

J4-12

EN2

J4-25

EN1

J4-13

PTT

J4-5

ALETXD

J13-8

ALERXD

J13-7

EN13

J13-13

+12V

+5V

J13-2, 15

J13-6, 18

J7-2, 15

EN9

+12V

J7-13

DSPPRXA

J8-17

DSPRRXA

J8-4

DSPPTXA

J8-16

DSPRTXA

J8-3

SQUELCH

J8-23

CWKEY

J8-10

TCTXAI

J8-22

TCTXAO

J8-9

101112131415161718192021222324

FLTA

FLTB

FLTC

FLTD

FLTE

AMPALC

AMPPTT

AMPALC

J21-24

FLTTST

J3-10

RXOVLD

TRSW

FB7

AMPALC

FB6

FB5

FB4

FB3

FB2

FB1FB1

SPITXD

SPIRXD

RAWALC

BITE

J3-12

J3-17

J3-3

J3-16

J4-16

J4-3

SPITXD

SPIRXD

3RD L/O

+12V

GND

J4-1, 14

J4-2, 15

ALE MODULE

GND

BITE

PTT

SPICLK

J13-5

J13-4

J13-17

J13-1, 14

J7-17

J7-5

J8-1, 14

J7-1, 14

GND

PTT

BITE

BALTXA4

BALTXA3

BALRXA4

BALRXA3

BALTXA2

BALTXA1

BALRXA2

J8-5

J8-6

J8-25

J8-12

J8-24

J8-11

J8-18

+5V

FLTF

FLTG

J22-14

J22-14

J22-14

J22-14

J22-14

J22-14

J22-14

J22-14

J22-14

J22-14

SYNTH

2ND L/O

J54

J55

SPITXD

SPIRXD

J13-3

J13-16

J7-4

J7-16

J7-3

SPICLK

SPITXD

SPIRXD

BALRXA1

J18-19

GND

EXTCLK

EXTRXD

EXTTXD

FLTTST

J22-6

RXOVLD

J22-8

TRSW

J22-10

FB7

J22-5

FB6

J22-12

FB5

J22-11

FB4

J22-9

FB3

J22-7

FB2

J22-13

J22-14

J22-3, 4

1ST L/O

MODULE

BITE

ALERXA1

ALERXA2

ALETXA1

ALETXA2

J13-11

J13-12

J13-23

J13-24

J7-11

J7-12

J7-23

J7-24

ALERXA1

ALERXA2

ALETXA1

ALETXA2

AUDIO MODULE

PRMICA

SQA

J8-7

J8-20

J12-25

J12-13

J12-12

J12-11

J12-10

J12-9

J11-13

J12-8

J12-7

J12-6

J12-5

J12-4

J12-3

J12-2

+12VACC

25

26

ATURX

J50

ANT RF

+12V

OPTTXD

J13-10

EN12

N/C

ATUTX

EXTEN1

EXTEN2

EXTIN1

+12VACC

+12VACC

FILTER

MODULE

J51

TXRFHI

J52

RX RF

GND

J22-1, 2

J59 J59

J4-17

OPTRXD

J13-22

DEMODA

MODA

ENCRTXA2

ENCRTXA1

ENCRRXA2

ENCRRXA1

OPTTXA2

OPTTXA1

OPTRXA2

OPTRXA1

ECRXA

ECTXA

J7-10

J7-22

J11-10

J11-22

RMTTXD

RMTRXD

ECTXA

ECRXA

SER2RXD

SER2TXD

SER1RXD

SER1TXD

STNC

RMTWR

RMTCLK

RMTDATA

RMTA2

RMTA1

RMTA0

BITE

PTT

SPICLK

SPIRXD

MODULE

SPITXD

ECU/RCU INTFC

INPUT

20A

123

VS

Figure 3-7

Mainframe Wiring Schematic

J26-1

J26-3

J26-2

VS

GND

12VDCPWR

MODULE

POWER SUPPLY/

EXT AMP INTFC

SPARE 1

+5V

+12V

+12UNREG

+12VACC

J20-11, 23

J20-4,5,16,17

J20-6,7,18,19

J20-9,10,21,22

J20-12,13,24,25

3

2

1

J23

J52

J6-12

J6-19

EN11

J6-13

J6-17

T12

RX RF

RAWALC

1ST L/O

BITE

75 MHz IF

MODULE

75 MHz IF

AGC

ALCLVL

PTT

J6-6

J6-5

EN6

PTT

BITE

DEMODA

J5-21

J8-21

J8-8

J7-21

J7-20

J7-19

J7-18

J7-9

J7-8

J7-7

J7-6

J11-17

J11-5

J11-4

J11-16

J11-3

J53

J6-18

J55

J54

J53

J5-18

AGC

2ND L/O

3RD L/O

75 MHz IF

MODA

J5-8

PWRON

J21-7

SPIRXD

J21-3

SPITXD

J21-16

SPICLK

J21-4

+12VFAN

J24-2

FAN

FAN

J24-1

GND

+12VPA

GND

E2

E1

J21-1, 14

2

1

J24

J20-1,2,3,14,15

GND

J12

+12VPA

TXRFHI

P.A.

MODULE

T12

TXRFLOW

J10

J25

J60

J6-4

J6-16

J6-3

SPICLK

SPITXD

SPIRXD

TXRFLOW

GND

+12V

NB/FM IF

J6-1, 14

J6-2, 15

J5-2, 15

J5-2, 14

GND

+12V

NB/FM IF

5 MHz IF

MODULE

SPICLK

SPITXD

SPIRXD

J5-4

J5-3

J5-16

BITE

J10-17

J10-21

J10-20

J10-19

J10-18

OPTTXA2

J10-9

OPTTXA1

J10-8

OPTRXA2

J10-7

OPTRXA1

J10-6

EN15

+12V

J10-13

J10-2, 15

BITE

J10-17

J10-21

J10-20

J10-19

J10-18

OPTTXA2

J10-9

OPTTXA1

J10-8

OPTRXA2

J10-7

OPTRXA1

J10-6

EN14

+12V

J9-13

J9-2, 15

J2-17

BITE

J56 J56

ENCRTXA2

ENCRTXA1

ENCRRXA2

ENCRRXA1

ENCRTXA2

ENCRTXA1

ENCRRXA2

ENCRRXA1

J2-2, 15

+12V

NB/FM

MODULE

FM RF

NB IF

FMDEMA

FMMODA

FMEN

J2-12

J2-11

J2-24

J2-25

J57

J57

J58 J58

J5-12

J5-11

J5-24

J5-25

NB IF

FMEN

FM RF

FMDEMA

FMMODA

ENCRPTTI

J10-22

ENCRPTTO

J10-10

PTT

J10-5

SPICLK

J10-4

SPIRXD

J10-16

SPITXD

J10-3

MODULE

OPTION 2

OPTRXD

J10-23

OPTTXD

J10-11

+5V

SPARE 1

GND

J10-1, 14

J10-25

J10-12, 24

ENCRPTTI

J9-22

ENCRPTTO

J9-10

PTT

J9-5

SPICLK

J9-4

SPIRXD

J9-16

SPITXD

J9-3

OPTRXD

J9-23

MODULE

OPTION 1

OPTTXD

J9-11

+5V

SPARE 1

GND

J9-1, 14

J9-25

J9-12, 24

[phone]

Time:

994126

29-Mar-2007 15:05:25994126K.SCH

3-15

Diagram (994126 Rev. K)

J2-1, 14

GND

NBEN

NB/FMTST

BITEEN

PTT

J2-9

J2-5

J2-10

J5-10

J5-7

NBEN

BITEEN

NB/FMTST

Date:File:

08-29-97

Date:

Date:

Schematic

Appr:

Drawn:

TW7000 MAINFRAME WIRING

D

Title:

Size: Dr awing Number:

N/C

10

8

9

PWRON

6

8

REMTXA

4

7

REMRXA

2

6

ISDN2

9

5

ISDN1

7

4

REMSP

REMOTE

+12V ACC

+12V UNREG

GND

REAR PANEL

5

3

3

2

1

1

J18

J1-31

J1-27

CONNECTOR

CONNECTOR

FRONT PANEL

J1-32

FPRXD

EXTSPKR

FPTXD

FRONT

PANEL

J1-25

PRMICA

AUXPTT

J12-20

REMTXA

J12-15

REMRXA

J12-16

ISDN2

J12-17

ISDN1

J12-19

REMSP

J12-18

+12V

GND

J12-1, 14

J11-1, 14

J11-2, 15

J1-26

J1-22

J1-15

J1-29

J1-28

J1-34

J1-33

J1-23

J1-21

J1-24

J1-20

J1-19

J1-17

J1-18

J1-16

J1-14

J1-13

J1-12

J1-11

J1-10

J1-9

J1-8

J1-7

J1-6

J1-30

J1-1,2

J1-3,4

GND

SQA

+12UNREG

J1-5

FB0

FB1

FB2

FB3

FB4

FB5

FB6

FB7

FPCWA

FPCWKEY

ENA

FPSP3

FPSP2

FPPTT

FPSPIRXD

FPSP1

FPBITE

ISDNMSEL

FPTCALM

FPSPICLK

FPSPITXD

MODEM EN

J33

123

4

GND

PWRON

PWRON

FPWSP2

FPWSP1

+12UNREG

TW7000MS

CHAPTER 4

TECHNICAL DESCRIPTION

This chapter contains detailed information on each of the TW7000 boards. It
should be read prior to servicing or adjusting the TW7000.

Remove a board by pulling it out of its card slot. To service it in the radio,
mount it on the appropriate extender card, and replace it in the slot for
servicing. The following kits are available to help service and make
adjustments to these boards.

• 7000EXT extender kit

• TW7000TK tool kit

4.1 Power Supply Board

The Power Supply board consists of the power supply and its heat sink. The
board is mounted to its heat sink and then mounted on the vertical chassis
bracket located immediately behind the main heat sink, facing the inside of
the rear panel. The Power Supply board is connected to the rear panel via the
DC power cable which plugs into the 3-pin connector J26.

In addition to containing the regulators to generate the various DC voltages
used throughout the radio, the power supply contains reverse polarity and
over/under-voltage protective circuits. It has decoder and line driver circuitry
that takes the serial harmonic filter band-switching data from the Processor
board and translates it into parallel data for use with external high-power RF
amplifiers. This information is sent via connector J25 directly to the
Accessory 3 connector on the rear panel.

The TW7000 has an on-demand cooling fan controlled by a thermal sensor
located on the RF Power Amplifier board heat sink. This sensor sends a signal
to the processor when the heat sink temperature exceeds a predetermined
level. The Processor board sends a signal on the serial data line to the BITE
decoder circuit which turns on the fan.

The following table provides the interconnections between the Power Supply
board and the rest of the TW7000.

Note: There are several other lines that pass through this board, going
between J21 (processor) and J25 (Accessory 3 on the rear panel). Table 5-1
lists only those lines that actually interface with the circuitry on the Power
Supply board.

TW7000MS 4-1

4: Technical Description Power Supply Board

4.1.1
Inter-

connections

The following table provides the interconnections between the Power Supply
board and the rest of the TW7000.

Table 4-1. Power Supply Interconnections

Connector J26 Description

1 Ground

2 12 Vdc PWR

3VS

Connector J25 Description

1, 2, 3, 4 Ground

11 FLTA

13 FLTB

15 FLTC

17 FLTD

19 FLTE

21 FLTF

23 FLTG

Connector J20 Description

1, 2, 3, 14, 15 Ground

4, 5, 16, 17 +12V

6, 7, 18, 19 +12V ACC

9, 10, 21, 22 +12V UNREG

12, 13, 24, 25 +5V

Connector J21 Description

4 SPICLK

7PWRON

13 EN8

4-2 TW7000MS

Power Supply Board 4: Technical Description

4.1.2
Test Procedure This test procedure requires the following equipment:

• Multimeter

• Power supply 0 to 20 Vdc minimum

• 3 Jumper cables

Ohm Meter Test 1. Check the following points for shorts to ground: J26-2, J20-9, J20-4, J20-

6, J20-12, and J20-11(if shorted, repair before applying power).

2. Check the following points for resistance; all readings should be 100
ohms ±5 ohms:

J25-5 to J21-25 J25-12 to J21-22

J25-6 to J21-12 J25-14 to J21-9

J25-7 to J21-24 J25-16 to J21-21

J25-8 to J21-11 J25-18 to J21-8

J25-9 to J21-23 J25-20 to J21-20

Voltage
Measurements

J25-10 to J21-10

1. Apply 13.8 Vdc to the radio. Turn the radio on and check the following
points for correct voltages:

J26-2, 13.8 Vdc ±.2 Vdc J20-6, 12.0 Vdc ±.6 Vdc

J26-1, 13.8 Vdc ±.2 Vdc J20-7, 12.0 Vdc ±.6 Vdc

J20-9, 13.8 Vdc ±.2 Vdc J20-18, 12.0 Vdc ±.6 Vdc

J20-10, 13.8 Vdc ±.2 Vdc J20-19, 12.0 Vdc ±.6 Vdc

J22-21, 13.8 Vdc ±.2 Vdc J20-22, 13.8 Vdc ±.2 Vdc

J20-4, 12.0 Vdc ±.6 Vdc J20-12, 5.0 Vdc ±.25 Vdc

J20-5, 12.0 Vdc ±.6 Vdc J20-13, 5.0 Vdc ±.25 Vdc

J20-16, 12.0 Vdc ±.6 Vdc J20-24, 5.0 Vdc ±.25 Vdc

J20-17, 12.0 Vdc ±.6 Vdc J20-25, 5.0 Vdc ±.25 Vdc

J24-2, 13.8 Vdc ±.5 Vdc

2. Check the voltage protect circuit. Connect the volt meter to
J20-4. 12.0 Vdc ±.6 Vdc should be present. Vary the power supply from

10.5 Vdc to 16 Vdc. The voltage at test point should drop to zero when
the power supply is at or below 10.0 Vdc and at or above 15.8 Vdc.

TW7000MS 4-3

4: Technical Description Power Supply Board

g

12V PA

E2J26

+12V Unre

J20-9, 10, 21, 22

+12V

J20-4, 5, 16, 17

+12 Vdc

+12V ACC

J20-6, 7, 18, 19

+12 Vdc

Regulator

Regulator

+5V

J20-12, 13, 24, 25

+5 Vdc

Regulator

Relay

Main Power

Fan

12 VDC PWR

J24-1

Interlock

Power Relay

Filter

Polarity

Reverse

Voltage

Detector

J21-7

PWR ON

J25-13

J25-11

FLT A

FLT B

External Amp

J25-15

FLT C

Decoder/

J25-17

FLT D

Fan

Driver

Decoder/

Driver

J25-19

FLT E

J25-23

J25-21

FLT F

FLT G

Amp

J21-13

EN 8

Figure 4-1. Power Supply Block Diagram

4-4 TW7000MS

4: Technical Description Power Supply Board

Figure 4-2. Power Supply Board Component Locations (738223 Rev. G)

4-6 TW7000MS

Figure 4-3

Schematic Diagram

Power Supply Board

4-7

(994158 Rev. M)

TW7000MS

Power Supply Board 4: Technical Description

Table 4-2. Power Supply Board Parts List (001-00410 Rev. AA)

Designator Part Number Description

C1 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C10 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C11 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C12 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C13 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C14 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C15 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C16 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C17 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C18 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C19 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C20 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C21 234470 CAP,47MF 35V ELECT VRT

C22 237101 CAP,100MF 16V ELECT VRT

C23 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C24 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C25 232100 CAP, 10UF AL 35V 20% 5X7 0.1LS

C26 232100 CAP, 10UF AL 35V 20% 5X7 0.1LS

C27 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C28 241226 CAP,T,22UF,25V,20%,RA,.1SP

C29 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C3 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C30 232100 CAP, 10UF AL 35V 20% 5X7 0.1LS

C31 232100 CAP, 10UF AL 35V 20% 5X7 0.1LS

C32 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C33 241226 CAP,T,22UF,25V,20%,RA,.1SP

C34 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C35 241476 CAP, 47UF TA 20V 20% 0.1LS

C36 232100 CAP, 10UF AL 35V 20% 5X7 0.1LS

C37 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C38 241226 CAP,T,22UF,25V,20%,RA,.1SP

C4 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C40 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

TW7000MS 4-9

4: Technical Description Power Supply Board

Table 4-2. Power Supply Board Parts List (001-00410 Rev. AA)

Designator Part Number Description

C41 275104 CAP, 0.1UF X7R 50V 10% 0.1LS

C43 234470 CAP,47MF 35V ELECT VRT

C5 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C6 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C9 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

D1 320420 DIODE,IN5822 3 AMP SCHOTTKY

D2 320002 DIODE, 1N4148/1N4150 DO-35

D4 320002 DIODE, 1N4148/1N4150 DO-35

D5 320002 DIODE, 1N4148/1N4150 DO-35

E1 860008 LUG TURRET KEYSTONE 1553-2

E2 860008 LUG TURRET KEYSTONE 1553-2

J20 613163 CONN,DB-25 RT ANGLE PC PLUG

J21 613163 CONN,DB-25 RT ANGLE PC PLUG

J24 610105 HEADER, 1X2 W/LB-LOCK 0.1 TH

J25 614021 HEADER,DIN,26PIN,.100,VERTICLE

J26 610209 HEADER,MLX,3PIN,.156,POLAR

K1 540079 RELAY,SPDT 12VDC 10 AMP

L1 450132 IND ASSY,3T#28 MGT 1-490201

L2 450132 IND ASSY,3T#28 MGT 1-490201

L3 450132 IND ASSY,3T#28 MGT 1-490201

L4 450132 IND ASSY,3T#28 MGT 1-490201

L5 450132 IND ASSY,3T#28 MGT 1-490201

L6 450132 IND ASSY,3T#28 MGT 1-490201

L7 450132 IND ASSY,3T#28 MGT 1-490201

L8 430048 CHOKE,68UH HEAVY DUTY HASH

Q1 310052 XSTR, PN2907A PNP TO92

Q2 310057 XISTOR,NPN,PN2222A,TO92

Q6 310138 XISTOR,FET,VN2222LL,TO92

R1 113101 RES,100 OHM 1/8W 5% CF

R10 113101 RES,100 OHM 1/8W 5% CF

R12 1118701 RES, 18.7K, 1/8W, 1%

R13 1111471 RES, 1.47K, 1/8W, 1%, MF

R14 1111651 RES, 1.65K, 1/8W, 1%, MF

4-10 TW7000MS

Power Supply Board 4: Technical Description

Table 4-2. Power Supply Board Parts List (001-00410 Rev. AA)

Designator Part Number Description

R15 113103 RES,10K 1/8W 5% CARBON FILM

R16 113103 RES,10K 1/8W 5% CARBON FILM

R18 113102 RES, 1K, 1/8W, 5%, CF

R19 1111210 RES,121 1/8W 1% METAL FILM

R2 113101 RES,100 OHM 1/8W 5% CF

R20 1111021 RES,1.02K 1/8W 1%

R21 1111210 RES,121 1/8W 1% METAL FILM

R22 1111021 RES,1.02K 1/8W 1%

R23 1111210 RES,121 1/8W 1% METAL FILM

R24 1113650 RES, 365ohm, 1/8W, 1%, MF

R3 1110000 RES,0 OHM,1/8W,1%

R31 113103 RES,10K 1/8W 5% CARBON FILM

R33 113100 RES,10 OHM 1/8W 5% FILM

R4 113101 RES,100 OHM 1/8W 5% CF

R5 113101 RES,100 OHM 1/8W 5% CF

R6 113101 RES,100 OHM 1/8W 5% CF

R7 1110000 RES,0 OHM,1/8W,1%

R8 1110000 RES,0 OHM,1/8W,1%

R9 113101 RES,100 OHM 1/8W 5% CF

U1 330384 IC,5821 8-BIT SER DRIVER DIP16

U2 330384 IC,5821 8-BIT SER DRIVER DIP16

U3 330398 IC,MC34161P VOLTAGE MONITOR

TW7000MS 4-11

4: Technical Description Reference/Control Board

4.2 Reference/Control Board

The Reference/Control board plugs into the motherboard at J3. It is located on
the right side of the radio, second slot from the front.

In addition to the 16.777216-MHz reference oscillator, this board contains the
transceiver ALC processing circuitry, the RF power level setting
potentiometers, and the serial-to-parallel decoders that drive the harmonic
filter band-switching circuits on the RF Filter board.

4.2.1
Inter-

connections

For the interconnect lines between the Reference/Control board and the rest of
the radio, refer to the table below. If the High Stability option is installed, the
optional oscillator mounts to this board and the board is given a new part
number.

Table 4-3. Reference/Control Board Interconnects

Connector J3 Description Comment

1 Ground

2 +12V input

3 No connection No connection

4 SPICLK Clock

5/PTTPTT

6 FB2 Filter band 2 control line

7 FB4 Filter band 4 control line

8 FB6 Filter band 6 control line

9 /TRSW T/R relay control line

10 AMPALC Input from external amplifier ALC

11 No connection No connection

12 RAWALC Transceiver ALC line

13 EN7 External amplifier filter band decoder

enable line

14 RVSPWR Reflected power indicator

15 FWDPWR Forward power indicator

16 SPITXD Serial TX data line

17 /BITE BITE line

18 FB1 Filter band 1 control line

19 FB3 Filter band 3 control line

20 FB5 Filter band 5 control line

21 FB7 Filter band 7 control line

22 No connection No connection

4-12 TW7000MS

Reference/Control Board 4: Technical Description

Table 4-3. Reference/Control Board Interconnects

Connector J3 Description Comment

23 PWRLVL RF power level status line

24 FLTTST RF Filter board status line

25 EN10 RF power level control enable

4.2.2
Test Procedures These test procedures require the following equipment:

• Frequency counter

• 100W Dummy load

• Wattmeter

• 250W slug

• Two-tone test box

• Extender card set

Input/Output
Signals

Adjustments and
Measurements

1. Reference the signal output at J61; frequency = 16.777216 MHz Level =

2 VPP.

2. Forward power input (FWDPWR) at J3-15.

3. Reverse power input (RVSPWR) at J3-14.

4. External amplifier ALC input (AMPALC) at J3-10.

5. ALC output (RAWALC) at J3-12.

6. Power level output (PWRLVL) at J3-23.

1. Measure the regulator voltage, U2 pin 16, +5 ±.25V, U5 output 8.0V ±.4.

2. Verify that the oscillator is stabilized.

3. Set the radio transmit frequency to 30.0 MHz and the radio mode to USB

AME.

4. Key the PTT, measure the RF output of the radio and adjust the oscillator

for 30.000000 MHz.

5. Verify the transmit frequency at 15.0 MHz and 2.0 MHz. The frequency

error should not exceed the specification for the installed oscillator
option.

6. Repeat the following adjustments to R1 and R22 until no further

adjustment is required:

• Adjust R1 (high power set) for a transmit output power of 100W
average, single tone at 14.75 MHz.

TW7000MS 4-13

4: Technical Description Reference/Control Board

• Adjust R22 (low power set) for 10W average, single tone at 14.75
MHz.

7. Remove the load from the wattmeter. Key the radio in high power and
adjust R29 (reverse power set) for 12W of reflected power.

Miscellaneous
Test

1. Verify the radio’s low pass filter select by setting it to the following
frequencies. The pin for the filter should be logic low with all other Filter
board pins logic high.

Frequency Filter Pin

1.6 MHZ FB1 18

2.74 MHZ FB1 18

2.75 MHZ FB2 6

3.99 MHZ FB2 6

4.0 MHZ FB3 19

6.24 MHZ FB3 19

6.25 MHZ FB4 7

8.99 MHZ FB4 7

9.0 MHZ FB5 20

13.49 MHZ FB5 20

13.5 MHZ FB6 8

20.99 MHZ FB6 8

21.0 MHZ FB7 21

30.0 MHZ FB7 21

2. Key the radio at 30 MHz and ground J3-10. The power out should reduce.

Digital TX Power
Adjustment

1. Key the radio in high power at 14.75 MHz.

2. Check for low power at approximately 10W, medium power at
approximately 25W, and high-power at approximately 100W with
Alpha 5 set to the default settings for each power level (refer to the
TW7000-MSOP operator manual for information on the Alpha menu and
function 5).

4-14 TW7000MS

Reference/Control Board 4: Technical Description

C

REF

J61

BITE

Circuit

OCXO

TCXO

(Option)

BITE

J3-17

PWRLVL

J3-23

RAWAL

J3-12

Amp

Amp

Pot

Digital

Control

J3-25

EN 10

J3-13

EN 7

J3-4

J3-16

SPITXD

Driver

Decoder/

SPICLK

J3-18

J3-6

J3-19

J3-7

J3-20

J3-8

J3-21

J3-24

FB6

FB1

FB2

FB3

FB4

FB7

FB5

FLTTST

Figure 4-4. Reference/Control Board Block Diagram

Amp

Amp

Amp

J3-14

J3-15

FWDPWR

J3-10

AMPALC

REVPWR

TW7000MS 4-15

4: Technical Description Reference/Control Board

Figure 4-5. Reference/Control Board Component Locations (738341 Rev. A)

4-16 TW7000MS

REV ECO DESCRIPTION DATE APPR

+12V

R17

A

11

Rev:

Sheet of

3030 Enterprise Ct.

Vista, CA 92083

[phone]

Figure 4-6

(994487 Rev. A)

Schematic Diagram

Reference/Control Board

R27

270K

C39

.01uF

A 02-0118 RELEASE 3-07-02

2

C29

COAXIAL CONNECTOR

J61

C10

.01uF

1

R71

150

GND

OUT

Y2

VCC

16.777216 MHz

180P

C28

L4

1UH

C30

0.1U

5

GND

4

OCXO

GND

3

700006

R58

150

180P

Q7

J310

C32

.01uF

S

R57

22K

R28

+5VC12

R26

47K

.01uF

R25

47K

2

OUT

Y1

VCC

TCXO

GND

1

361117

+5V

3

001-00206 ASSEMBLY ONLY 001-01022 ASSEMBLY ONLY

16.777216 MHz

L3

10uH

+5V

D13

4148

R30

1K

R38

7

U3B

LM2902

5

6

10K

R29

100K

8

R35

470K

U3C

9

47K

R32

C14

.01uF

R31

47K

R22

25K

R70

1K

+8V

POWER SET (L)

R15

47K

+5V

C2

0.1U

C7

2.2U

9

7

U2

Vcc

CLK

121311

DQ

354

16

NC

152

DS1267

+5V

1

6

GND

VB

/RST

COUT

SOUT

10

14

470K

10K

6.8K

R37

0.1U

R62

C16

.01uF

LM2902

C22

10

47K

R34

R48

100

+8V

R47

47K

+8V

R1

25K

POWERSET (H)

+8V

R46

R64

2.2K

100

R45

C3

0.1U

C1

2.2U

+5V

9

U1

8

NC

SER OUT

1

+5V

R44

75K

100

+5V

100

R65

R24

C11

.47UF

R69

270K

+12V

D9

6.8V

R23

2.2K

1

U3A

LM2902

10K

R67

47K

3

2

C9

0.1U

R19

75K

+8V

C37

10uF

C8

0.1U

1

78L08

+8V

GND

U5

Vin

C5

0.1U

8

C33

47uF

+5V

C36

47uF

C35

0.1U

1

78L05

+5V

U4

GND

Vin

8

C34

0.1U

100

R14

100

100

R10

R13

+5V

R40

470K

Q6

2907

D11

4148

R49

4.7K

C21

.01uF

27K

C20

.01uF

R11

47K

R2

10K

7

10

15

2

8

/G

RCK

SRCK

SER IN

VCC

O512O411O36O25O14O613O7

O0

3

14

D7

D6

D5

D4

D3

D2

D1

/CLR

GND

R42

R41

47K

12K

C18

0.1U

12

13

U3D

LM2902

14

R51

470

+5V

C13

0.1U

U6E

74HC02

7

VCC

GND

14

13

Schematic

74HC02

D10

4148

100

R43

TPIC6C595

16

U6D

11

R61

22K

R63

330

12

C19

47uF

Title:

GND

VCC

U3E

LM2902

C38

0.1U

+12V

C41

0.1U

Q5

2N7002

100

R16

Q4

C6

.01uF

R84

1.1K

Q14

R9

2N7002

464

+12V

Q3

4148

4148

4148

4148

4148

4148

4148

+5V

C4

0.1U

2N7002

R6

10KR810K

4

74HC02

U6B

5

6

10

1

74HC02

U6A

U6C

74HC02

8

9

2

+5V

3

R4

47K

R7

10K

4-17

Time:

994487

27-Jun-2007 11:03:53994487A.Sch

Date:File:

Date:

Date:

B BROOKS 02-19-02

Appr:

Drawn:

REF/CNTRL MODULE

B

Size: Drawing Number:

11 4

2N7002

100

R12

L2

10uH

GND

RVSPWR

+12V

FWDPWR

SPIRXD

SPITXD

SPICLK

/BITE

/PTT

FB1

FB2

FB3

FB4

FB5

FB6

FB7

/TRSW

RXOVLD

AMPALC

PWRLVL

VSWRALM

FLTTST

RAWALC

EN10

11421531641751861972082192210231124122513

J3

NC

NC

EN7

DB-25

NC

TW7000MS

Reference/Control Board 4: Technical Description

Table 4-4. Reference/Control Board Parts List (001-00206 Rev. E)

Designator Part Number Description

C1 022225000 CAP SM T 2.2U 16V 10% 3528

C11 021471003 CAP,0.47UF Y5V 16V 80/20% 0805

C12 021103000 CAP, 0.01UF X7R 50V 5% 0805

C13 021104000 CAP, 0.1UF X7R 25V 5% 0805

C14 021103000 CAP, 0.01UF X7R 50V 5% 0805

C16 021103000 CAP, 0.01UF X7R 50V 5% 0805

C18 021104000 CAP, 0.1UF X7R 25V 5% 0805

C19 022476000 CAP, 47UF TA 20V 20% 7343

C2 021104000 CAP, 0.1UF X7R 25V 5% 0805

C20 021103000 CAP, 0.01UF X7R 50V 5% 0805

C21 021103000 CAP, 0.01UF X7R 50V 5% 0805

C22 021104000 CAP, 0.1UF X7R 25V 5% 0805

C28 021181000 CAP 180PF NPO 100V 5% 0805

C29 021181000 CAP 180PF NPO 100V 5% 0805

C3 021104000 CAP, 0.1UF X7R 25V 5% 0805

C30 021104000 CAP, 0.1UF X7R 25V 5% 0805

C32 021103000 CAP, 0.01UF X7R 50V 5% 0805

C33 022476000 CAP, 47UF TA 20V 20% 7343

C34 021104000 CAP, 0.1UF X7R 25V 5% 0805

C35 021104000 CAP, 0.1UF X7R 25V 5% 0805

C36 022476000 CAP, 47UF TA 20V 20% 7343

C37 022106001 CAP, 10UF TA 16V 10% 6032

C38 021104000 CAP, 0.1UF X7R 25V 5% 0805

C39 021103000 CAP, 0.01UF X7R 50V 5% 0805

C4 021103000 CAP, 0.01UF X7R 50V 5% 0805

C41 021104000 CAP, 0.1UF X7R 25V 5% 0805

C5 021104000 CAP, 0.1UF X7R 25V 5% 0805

C6 021103000 CAP, 0.01UF X7R 50V 5% 0805

C7 022225000 CAP SM T 2.2U 16V 10% 3528

C8 021104000 CAP, 0.1UF X7R 25V 5% 0805

C9 021104000 CAP, 0.1UF X7R 25V 5% 0805

D1 037700005 DIODE, MMBD4148 SOT-23

D10 037700005 DIODE, MMBD4148 SOT-23

TW7000MS 4-19

4: Technical Description Reference/Control Board

Table 4-4. Reference/Control Board Parts List (001-00206 Rev. E)

Designator Part Number Description

D11 037700005 DIODE, MMBD4148 SOT-23

D13 037700005 DIODE, MMBD4148 SOT-23

D2 037700005 DIODE, MMBD4148 SOT-23

D3 037700005 DIODE, MMBD4148 SOT-23

D4 037700005 DIODE, MMBD4148 SOT-23

D5 037700005 DIODE, MMBD4148 SOT-23

D6 037700005 DIODE, MMBD4148 SOT-23

D7 037700005 DIODE, MMBD4148 SOT-23

D9 037703002 DIODE, ZENER 6.8V SMD SOT-23

J3 613163 CONN,DB-25 RT ANGLE PC PLUG

J61 614024 CONN,RF PIN FEMALE JACK #45

L2 041103002 IND SM 10UH 15% 4825

L3 041103003 IND,SM,10uH,.7A,DTI608C-103

L4 041102000 INDUCTOR,CHIP,1UH,SMT,1210,10%

Q14 032005 XSTR, 2N7002 N-MOSFET SOT-23

Q3 032005 XSTR, 2N7002 N-MOSFET SOT-23

Q4 032005 XSTR, 2N7002 N-MOSFET SOT-23

Q5 032005 XSTR, 2N7002 N-MOSFET SOT-23

Q6 032006 XSTR,MMBT2907A PNP SOT-23EBC

Q7 032001 XSTR,J310,NFET,SOT-23

R1 170335 RES, 25K TRIM SIDE ADJ

R10 013101000 RES SM CF 100R 0.1W 5% 0805

R11 013473000 RES SM CF 47K 0.1W 5% 0805

R12 013101000 RES SM CF 100R 0.1W 5% 0805

R13 013101000 RES SM CF 100R 0.1W 5% 0805

R14 013101000 RES SM CF 100R 0.1W 5% 0805

R15 013473000 RES SM CF 47K 0.1W 5% 0805

R16 013101000 RES SM CF 100R 0.1W 5% 0805

R17 013101000 RES SM CF 100R 0.1W 5% 0805

R19 013753000 RES,SM CF 75K 0.1W 5% 0805

R2 013103000 RES SM CF 10K 0.1W 5% 0805

R22 170335 RES, 25K TRIM SIDE ADJ

R23 013222000 RES SM CF 2.2K 0.1W 5% 0805

4-20 TW7000MS

Table 4-4. Reference/Control Board Parts List (001-00206 Rev. E)

Designator Part Number Description

R24 013101000 RES SM CF 100R 0.1W 5% 0805

R25 013473000 RES SM CF 47K 0.1W 5% 0805

R26 013473000 RES SM CF 47K 0.1W 5% 0805

R27 013274000 RES SM CF 270K 0.1W 5% 0805

R28 013103000 RES SM CF 10K 0.1W 5% 0805

R29 170334 RES,100K TRIM SIDE ADJ

R30 013102000 RES, 1K OHM 1/8W 5% TK 0805

R31 013473000 RES SM CF 47K 0.1W 5% 0805

R32 013473000 RES SM CF 47K 0.1W 5% 0805

R34 013473000 RES SM CF 47K 0.1W 5% 0805

R35 013474000 RES SM CF 470K 0.1W 5% 0805

R37 013103000 RES SM CF 10K 0.1W 5% 0805

R38 013474000 RES SM CF 470K 0.1W 5% 0805

4: Technical Description

R4 013473000 RES SM CF 47K 0.1W 5% 0805

R40 013474000 RES SM CF 470K 0.1W 5% 0805

R41 013123000 RES, 12K OHM 1/8W 5% TK 0805

R42 013473000 RES SM CF 47K 0.1W 5% 0805

R43 013101000 RES SM CF 100R 0.1W 5% 0805

R44 013753000 RES,SM CF 75K 0.1W 5% 0805

R45 013101000 RES SM CF 100R 0.1W 5% 0805

R46 013273000 RES SM CF 27K 0.1W 5% 0805

R47 013473000 RES SM CF 47K 0.1W 5% 0805

R48 013101000 RES SM CF 100R 0.1W 5% 0805

R49 013472000 RES SM CF 4.7K 0.1W 5% 0805

R51 013471000 RES SM CF 470R 0.1W 5% 0805

R57 013223000 RES SM CF 22K 0.1W 5% 0805

R58 013151000 RES SM CF 150R 0.1W 5% 0805

R6 013103000 RES SM CF 10K 0.1W 5% 0805

R61 013223000 RES SM CF 22K 0.1W 5% 0805

R62 013682000 RES SM CF 6.8K 0.1W 5% 0805

R63 013331000 RES SM CF 330 0.1W 5% 0805

R64 013222000 RES SM CF 2.2K 0.1W 5% 0805

R65 013103000 RES SM CF 10K 0.1W 5% 0805

TW7000MS 4-21

4: Technical Description Reference/Control Board

Table 4-4. Reference/Control Board Parts List (001-00206 Rev. E)

Designator Part Number Description

R67 013473000 RES SM CF 47K 0.1W 5% 0805

R69 013274000 RES SM CF 270K 0.1W 5% 0805

R7 013103000 RES SM CF 10K 0.1W 5% 0805

R70 013102000 RES, 1K OHM 1/8W 5% TK 0805

R8 013103000 RES SM CF 10K 0.1W 5% 0805

R84 013110100 RES,SM TK 1.1KOHM 0.1W 1% 0805

R9 013464000 RES, 464 OHM 1/8W 1% TK 0805

U1 033087 IC,8BIT SHIFT,TPIC6C595,SO-16

U2 033305003 IC,DS1267S 10KX2 DIG POT SOW16

U3 033304000 IC,SM,LM2902D,QUAD-OP,SO-14

U4 033003 IC,VREG 78L05 5V 5% SOIC-8

U5 033002 IC,VREG 78L08 8V 5% SOIC-8

U6 033081 IC,MC74HC02AD, SO-14 751A-02

Y1 361117 TCXO 16.777216MHz, 0.5PPM

4-22 TW7000MS

Synthesizer Board 4: Technical Description

4.3 Synthesizer Board

The Synthesizer board plugs into the motherboard at J4. The main purpose of
this board is to take the reference frequency input (16.777216 MHz) from the
Reference/Control board and use it to generate the three local oscillator
frequencies. It uses direct digital synthesis (DDS) techniques, in combination
with standard phase locked loop (PLL) circuitry, in the implementation of the
LO scheme.

The heart of the synthesizer is the DDS, which generates an output of

5.95 MHz to 7.00 MHz, depending on the selected input channel frequency.

This is mixed with the output of the 70 MHz voltage controlled oscillator, then
filtered and mixed again with the output of the first LO in the feedback path of
the PLL which generates the first LO. The output of the first LO is 75MHz to
105 MHz in 10 Hz increments. The second LO is the fixed 70 MHz output of
the voltage controlled oscillator. The third LO is generated by another PLL
tied to the overall reference frequency of the radio and programmed to one of
three outputs, depending on the setting of the front panel mode switch.

4.3.1
Interconnections For the interconnect lines between the Synthesizer board and the rest of the

radio, refer to the table below. Data for all of the synthesizers in the board is
input in serial format, with all data clocked as required to update frequency
selection. It is then latched into the particular synthesizer device by the
appropriate enable line.

Table 4-5. Synthesizer Board Interconnects

Connector J4 Description Comment

1 GND Ground

2 +12V input +12V

3 SPIRXD Receive serial data line

4 SPICLK Clock line

11 EN5 Not used

12 EN3 First LO synthesizer enable

13 EN1 Third LO synthesizer enable

14 GND Ground

15 +12V input +12V

16 SPITXD Transmit serial data line

17 BITE BITE signal to processor

24 EN4 BITE enable

25 EN2 DDS enable

TW7000MS 4-23

4: Technical Description Synthesizer Board

4.3.2
Test Procedures These test procedures require the following equipment:

• Oscilloscope

• SINAD meter

• Frequency counter

• Multimeter

• Power supply 0-20 Vdc

• Wattmeter

• -30 dBm Attenuator dummy load

• Two-tone test box

• Signal generator

• Extender card set

Alignment 1. Set the power supply for 13.8 Vdc.

2. Place the scope probe (x10) on J54. Adjust L7 for a maximum signal
(approximately 480 mVAC, 70 MHz).

Miscellaneous
Test

3. Place the scope probe on the bottom of R15 above J55 and adjust L1 for
exactly 3 Vdc (ensure scope is set for DC).

4. Place the scope probe on U3, pin 3 (set the scope to a 10 mv scale, 20 ms
time). Adjust L13-L17 for a maximum signal (approximately130 mVPP
minimum).

5. Set the radio frequency to 30.00 MHz. Carefully adjust L5 for 10 Vdc
±.25 at U5, pin 1.

1. Measure the voltage at U5, pin 8 for 9 Vdc ±.5V.

2. Verify that the RX tone is present with the signal generator set at

-113 dBm and 8.001 MHz, and the radio at 8 MHz USB. SINAD should
be approximately 10 dB or better. At -75 dBm level, the audio should be
approximately 3V or better with maximum volume and the radio’s
speaker off.

3. At -113 dBm input, check SINAD at various frequencies from 1.6 to 30
MHz (this verifies that the synthesizer is locking).

4. With the signal generator set to 8.001 MHz +6 dBm level, turn carrier off,
then on. The RX tone should sound normal.

4-24 TW7000MS

Synthesizer Board 4: Technical Description

TX Test 1. Connect the dummy load to the oscilloscope (2V scale, .5ms time). At 8

MHz, key the radio with the test box (set to +10 dBm). The TX wave
should be approximately 100W with no distortion.

2. Key the radio again at 2 MHz and 29.999 MHz. TX wave should be
approximately 100W with no distortion.

Input/Output
Signals

1. The reference input signal at J61 should read 16,777,216 Hz. The level
should be 2 VPP.

2. The first LO output signal at J59 should read 75 to 105 MHz. The level
should be 0 dBm, ± 2 dBm.

3. The third LO (BFO) output signal at J55 should read 5.000 MHz and

5.003 MHz. The level should be 0 dBm, ±2 dBm.

4. The second LO output signal at J54 should read approximately 70.000
MHz. The level should be 0 dBm, ±2 dBm.

TW7000MS 4-25

4: Technical Description Synthesizer Board

O

EN4

BITE

1st LO

2nd L

63.00 to 64.05 MHz

Filter

J54

6

5

1

1

A

VCO

Amp

U1B

Loop

Filter

419

J4-24

J4-17

BITE

1

Decoder

J59

3, 4

1

8

2nd LO

A

Amp

Filter

10.95 to 44 MHz

Amp

VCO

Filter

5.95 to 7.00 MHz

17

DAC

20

VCO

Amp

3rd LO PLL

J55

3rd LO

(BFO)

U1A

BITE

Switch

Loop

Loop

1st LO PLL

Filter

12

10

7

12

15

Synthesizer

J61

REF

Amp

Amp

J4-13

Amp

EN1

Filter

NCO

2

6

15

16

7

8

11

1

Synthesizer

Amp

J4-12

EN3

J4-25

EN2

Figure 4-7. Synthesizer Board Block Diagram

4-26 TW7000MS

4: Technical Description Synthesizer Board

Figure 4-8. Synthesizer Board Component Locations (738351 Rev. F)

4-28 TW7000MS

C

11

Rev:

Sheet of

3030 Enterprise Ct.

Vista, CA 92083

07-25-96

07-25-05

BS

BB

Figure 4-9

A NONE NOT USED 06-20-96BSB 7000-246 RELEASE

C 05-0162 ADDE D C300 DNP

Q2 12JAN96

Q3 31JAN96

Q1 PROTO 21DEC95

REV ECN DESCRIPTION DATE APPR

3RD L/O

BFO

J55

E6

T21

2T 2T

C33

47P

.01

C126

L8

R28

R73

10

0.1

C112

R72

22

L10

+8V

C35

C87

47P

Q10

0.22

R24

47

2N5770

R68

4.7K

22K

.001

C31

.01

C125

R74

150

D

S

R27

470

Q9

G

J310

C29

C30

33P

33P

R35

330K

D8

C32

150P

D11

L7 12.5T

MV209

70 MHz (2nd LO) OSC

C119 10P

R34

4.7K

C10

.001

R70

47

.01

MAR2

100

L35

4

2

U12

1 3

R4

150R6180

R5

220

C9

0.1

C6

.01

R3

680

D

S

L1

J310

G

Q2

C3

C4

100P

C1

D

S

C7

.001

R2

J310

C8

10

G

Q1

+

L2

C28

.01

R71

4.7K
C25

C122

.47

.01

+

R69

2.4K

R59

1.5K
C118

.01

R57

1.5K

L3

+5V

C113

0.1

C124

.01

C17

10

+

C123

.01

8

VCC

U15

7

D1

C2

R1

330K

100P

D2

MV209

.001

C5

100

L40

C15

.01

R15

15K

C14

C107

.47

.01

+

R14

2.4K

R13

1.5K
C13

.01

R12

1.5K

R75

47K

R19

D9

1

19

12

17

14

LD210LD1

SW1

SW2

MC145149

PDout1

PDout2

18 13

Fin14MC1

Fin27MC2

VDD1 VDD2

U1

2

6

9

2

3

4

PUP

OUT

GND

MC12015

CNTL

IN+5IN-6VREG

1

C16

.001

R9

10K

C12

.001

R10

47K

E6

C116

100

+

+5V

+8V

C105

10

C106

10

+

GND

78L08

Vin +8V

U10

EN4

EN2

25

EN4\

EN2\

U11

LM317

L34

123456789

J4

GND

R55

ADJ

IN OUT

C103

10

+

C104

.001

SPICLK

+12V

SPIRXD

SPICLK

1.6K
C115

0.1

R56

8.2K

EN3

EN1

101112131415161718192021222324

EN5\

EN3\

EN1\

GND

+

GNDU97805

Vin +5V

BITE

SPITXD

+12V

BITE\

SPITXD

1ST L/O

J59

C26

.01

100

L36

R25

150

220P

0.1

220

L6

+8V

Q5

PN2907A

47K

D10

8

16

Oout

S/Rout

20 11

VSS1 VSS2

ENB3DATA5CLK

Oin

.01

15

E4

C11

E5

Q4

VN2222LL

R11

100

EN1

MAR2

4

2

U13

1 3

R26

180

R23

100

C27

0.1

C24

.01

R22

680

D

S

J310

7P

C111

C300

C22

C18

MV209

27

L18

R43

470

C77

R42

1K

C72

.001

C69

10

C68

+

E4

J61

REF

BITE

R54

R53

Q15

PN2222A

L5

7T

4T

33P

0.1
R21

C21

D

S

J310

G

Q6

D3

R20

330K

10P

C23

.001

1

100P

33078

2

C76

.01

R39

R40

2.2K

.001

R38

R37

2.2K

15

4

PH/R16PH/V

VDD

OIN1OUT2FIN8LE11DATA10CLK

U4

C109

C70

.001

E2

100

C108

.001

3.3K

R58

47K

DNP

470

U5A

3

C74

R41

2.2K

2.2K

3

FR13FV

.01

R61

T20

2T 8T

G

Q7

C19

0.1

C20

10

+

L4

D4

+5V

L26

D6

C88

1.0

+

R51

D5

R63

1K

15

1

QB

QA

OE13LCLK12SERIN

RST10SCLK

U14A

+5V

4-29

(994304 Rev. C)

Synthesizer Board

Schematic Diagram

U5C
8

C83

C82

+

L27

C79

+

8

V+

6

VCC

C1+7C1-1C2+2C2-

U6

+

C78

C80

47

+

C81

0.1

R66

220

100P

+8V

.01

C75

1K

.001

C73

12

5

7

LD

6

DOP

DOA

VSS

R76

47K

MB87086

9

1K

R44

10K

R45

47K

R50

47K

D7

16

8

+5V

U14B

10K

74HC595

3

7

5

9

QE4QF

QC2QD

QG6QH

SEROUT

74HC595

14

11

100

100

100

R52

R65

R64

EN4

SPICLK

SPITXD

E2

T17

1T 2T

C67

120p

C66

18p

L25

L24

R33

68

L22

C61

.01

4

L23

U3

+5V

L21

L20

4

33078

.001

10

47

4

V-

5

GND

MAX680

3

47

7

U5B

33078

6

5

R36

47K

Q12

PN2907A

2ND L/O

J54

Q13

VN2222LL

R46

100

EN3

L30

+5V

L29

C85

.001

10

C84

+

R62

1K

2511

VDD VDD

U7

R47

10K

R16

R67

47K

10K

2N5770

100

100

R17

R18

Q8

C110

.01

T19

2T 2T

C117

.01

E5

VN2222LL

Q3

C49

C47

C45

C43

+5V

L12

C37

.001

C41

10

C36

+

7

OUTA4OUTB

8

O-OUT

INA1INB

O-IN

U2

6

C34

.001

C38

.01

R29

R60

100

3.0

C101

68p

L33

2.7

C99

100p

L32

3.8

C97

20p

L31

C94

.001

C95

.01

10

C93

+

17

AOUT

18 19

CLK

AVCC DVCC

U8

10

20

28

CLK2WRSTB3RESET4SERIN5FRLD6PHLD7PHMOD08PHMOD19PHMOD2

2.2

C86

+

R48

10K

R49

EN2

C54

.001

C65

150p

C64

51p

C62

.001

MAR6

2

1 3

C60

.001

C58

18p

C56

51p

MX1

T18

E1E1

56p

C50

7p

1.8p

1.8p

2.2p

12p

C40

5

R32

C63

C59

C57

C55

2

GND

MIXER

RF

1

560

100p

R31

1.2K

Q11

MRF904

+5V

120p

L19

C53

.1

R30

150p

220

C52

.1

100p

T3

2T 5T

8

4

6

IF

LO

GND

SRA-1

IF

GND

GND

3

5

7

2T 2T

C51

180p

L17

L16

47p

C48

L15

47p

C46

L14

47p

C44

L13

47p

C42

.001

3

NE602

2

C39

.001

100

C102

220p

C100

270p

C98

300p

C96

270p

C92

.001

10

C91

+

14

16

REF1

REF2

MB40760

12 11

D1 (MSB)1D22D33D44D55D66D77D88D99D10 (LSB)

COMP

REFIN

AGND DGND

13

15

C90

.001

1.0

C89

+

14

16

13

O917O819O720O621O522O423O324O226O127O0

O1115O10

STEL-1179

SEROUT

MSBOUT

118

VSS VSS

10

100

[phone]

Time:

994304

30-Mar-2007 11:05:36994304C.SCH

Date:File:

21DEC95

Date:

Date:

Schematic

Appr:

Drawn:

SYNTHESIZER MODULE TW7000

D

Title:

Size: Dr awing Number:

UNLESS OTHERWISE SPECIFIED

4 INDUCTANCE IS IN MICROHENRYS

3 DIODES ARE 1N4148

2 CAPACITANCE IS IN MICROFARADS

1 RESISTANCE IS IN OHMS

NOTES:

TW7000MS

Synthesizer Board 4: Technical Description

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

C1 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C10 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C100 275271 CAP,ML NPO 270PF 100V 5% 0.2S

C101 275680 CAP,68 PF NPO MONOLITHIC

C102 276221 CAP,ML 220PF NPO 5% 100V 0.1S

C103 241100 CAP,10MF DIP TANTALUM

C104 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C105 241100 CAP,10MF DIP TANTALUM

C106 241100 CAP,10MF DIP TANTALUM

C107 241047 CAP,0.47MF 35V DIP TANT

C108 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C109 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C11 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C110 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C111 210070 CAP,7PF NPO 50V .5PF 0.1LS DSK

C112 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C113 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C115 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C116 231101 CAP,100U,16V,20%,RADIAL, .1SP

C117 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C118 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C119 277100 CAP, ML 10PF AXIAL NPO 5%

C12 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C122 241047 CAP,0.47MF 35V DIP TANT

C123 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C124 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C125 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

C126 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C13 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C14 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C15 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C16 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C17 241100 CAP,10MF DIP TANTALUM

TW7000MS 4-31

4: Technical Description Synthesizer Board

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

C18 277100 CAP, ML 10PF AXIAL NPO 5%

C19 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C2 221101 CAP,100PF DM5 MICA

C20 241100 CAP,10MF DIP TANTALUM

C21 275330 CAP,ML NPO 33PF 100V 5% 0.1S

C22 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C23 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C24 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C25 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C26 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C27 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C28 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C29 275330 CAP,ML NPO 33PF 100V 5% 0.1S

C3 221101 CAP,100PF DM5 MICA

C30 275330 CAP,ML NPO 33PF 100V 5% 0.1S

C31 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C32 275151 CAP,ML 15OPF NPO 100V 5% 0.1S

C33 275470 CAP,ML 47PF NPO 5% 100V 0.1SP

C34 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C35 275102 CAP,C,.001UF,100V,5%,N,RA,.1SP

C36 241100 CAP,10MF DIP TANTALUM

C37 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C38 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C39 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C4 221221 CAP. 220PF, MICA

C40 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C41 210120 CAP,12 PF DISC NPO

C42 275470 CAP,ML 47PF NPO 5% 100V 0.1SP

C43 210022 CAP,2.2PF NPO 50V 0.1LS DSK

C44 275470 CAP,ML 47PF NPO 5% 100V 0.1SP

C45 210018 CAP,1.8 PF NPO DISC

C46 275470 CAP,ML 47PF NPO 5% 100V 0.1SP

C47 210018 CAP,1.8 PF NPO DISC

4-32 TW7000MS

4: Technical Description

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

C48 275470 CAP,ML 47PF NPO 5% 100V 0.1SP

C49 210022 CAP,2.2PF NPO 50V 0.1LS DSK

C5 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C50 221560 CAP,56PF 5% DM5 MICA

C51 275181 CAP,ML 180PF NPO 5% 100V 0.1S

C52 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C53 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C54 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C55 221101 CAP,100PF DM5 MICA

C56 210510 CAP,51 PF 5% 50V DISC NPO

C57 275151 CAP,ML 15OPF NPO 100V 5% 0.1S

C58 275180 CAP,ML 18PF 5% 100V NPO 0.1 S

C59 275121 CAP,ML 120PF NPO 5% 100V 0.1S

C6 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C60 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C61 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C62 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C63 221101 CAP,100PF DM5 MICA

C64 210510 CAP,51 PF 5% 50V DISC NPO

C65 275151 CAP,ML 15OPF NPO 100V 5% 0.1S

C66 275180 CAP,ML 18PF 5% 100V NPO 0.1 S

C67 275121 CAP,ML 120PF NPO 5% 100V 0.1S

C68 241100 CAP,10MF DIP TANTALUM

C69 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C7 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C70 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C72 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C73 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C74 221101 CAP,100PF DM5 MICA

C75 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C76 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C77 221101 CAP,100PF DM5 MICA

C78 241476 CAP, 47UF TA 20V 20% 0.1LS

TW7000MS 4-33

4: Technical Description Synthesizer Board

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

C79 241476 CAP, 47UF TA 20V 20% 0.1LS

C8 241100 CAP,10MF DIP TANTALUM

C80 241476 CAP, 47UF TA 20V 20% 0.1LS

C81 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C82 241100 CAP,10MF DIP TANTALUM

C83 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C84 241100 CAP,10MF DIP TANTALUM

C85 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C86 241020 CAP,2.2MF DIP TANTALUM

C87 275470 CAP,ML 47PF NPO 5% 100V 0.1SP

C88 241010 CAP,1.0 MF DIP TANTALUM

C89 241010 CAP,1.0 MF DIP TANTALUM

C9 277104 CAP,C,0.1U,50,10%,X,AX,.25SP

C90 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C91 241100 CAP,10MF DIP TANTALUM

C92 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C93 241100 CAP,10MF DIP TANTALUM

C94 277102 CAP,C,1000P,100,10%,X,AX,.25SP

C95 277103 CAP,C,0.01U,100,10%,X,AX,.25SP

C96 275271 CAP,ML NPO 270PF 100V 5% 0.2S

C97 210200 CAP,20 PF DISC NPO

C98 221301 CAP, 300 PF DM5 MICA

C99 221101 CAP,100PF DM5 MICA

D1 320002 DIODE, 1N4148/1N4150 DO-35

D10 320002 DIODE, 1N4148/1N4150 DO-35

D11 320305A VARACTOR MV209,1099/TW2000

D2 320305A VARACTOR MV209,1099/TW2000

D3 320002 DIODE, 1N4148/1N4150 DO-35

D4 320305A VARACTOR MV209,1099/TW2000

D5 320002 DIODE, 1N4148/1N4150 DO-35

D6 320002 DIODE, 1N4148/1N4150 DO-35

D7 320002 DIODE, 1N4148/1N4150 DO-35

D8 320002 DIODE, 1N4148/1N4150 DO-35

4-34 TW7000MS

Synthesizer Board 4: Technical Description

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

D9 320002 DIODE, 1N4148/1N4150 DO-35

E1 769330-1 SEMI-RIGID CA,SYNTH,E1,TW7000

E2 769330-2 SEMI-RIGID CA,SYNTH,E2,TW7000

E4 769330-4 SEMI-RIGID CA,SYNTH,E4,TW7000

E5 769330-3 SEMI-RIGID CA,SYNTH,E5,TW7000

E6 769330-5 SEMI-RIGID CA,SYNTH,E5,TW7000

J4 613163 CONN,DB-25 RT ANGLE PC PLUG

J54 614026 CONN,RF FEMALE LOW-TYPE RECEPT

J55 614026 CONN,RF FEMALE LOW-TYPE RECEPT

J59 614026 CONN,RF FEMALE LOW-TYPE RECEPT

J61 614026 CONN,RF FEMALE LOW-TYPE RECEPT

L1 490146 INDUCTOR,12 UH VARIABLE

L10 459032 IND ASY,3T#30 MAGNET 1-490201

L12 459032 IND ASY,3T#30 MAGNET 1-490201

L13 490114 CORE 6.5T (MD) SQ LG PI CORE

L14 490114 CORE 6.5T (MD) SQ LG PI CORE

L15 490114 CORE 6.5T (MD) SQ LG PI CORE

L16 490114 CORE 6.5T (MD) SQ LG PI CORE

L17 490114 CORE 6.5T (MD) SQ LG PI CORE

L18 430013 INDUCTOR, FIXED 27 UHY

L19 459032 IND ASY,3T#30 MAGNET 1-490201

L2 459032 IND ASY,3T#30 MAGNET 1-490201

L20 459260 IND ASSY,8T#24 MAG 1-490032

L21 459261 IND ASSY,9T#24 MAG 1-490032

L22 459032 IND ASY,3T#30 MAGNET 1-490201

L23 459032 IND ASY,3T#30 MAGNET 1-490201

L24 459260 IND ASSY,8T#24 MAG 1-490032

L25 459261 IND ASSY,9T#24 MAG 1-490032

L26 459032 IND ASY,3T#30 MAGNET 1-490201

L27 459032 IND ASY,3T#30 MAGNET 1-490201

L29 459032 IND ASY,3T#30 MAGNET 1-490201

L3 459032 IND ASY,3T#30 MAGNET 1-490201

L30 459032 IND ASY,3T#30 MAGNET 1-490201

TW7000MS 4-35

4: Technical Description Synthesizer Board

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

L31 459232 IND ASSY 21T #26MAG 1-490060

L32 459230 IND ASSY 17T#26 MAG 1-490060

L33 459231 IND ASSY 18T#26 MAG 1-490060

L34 459032 IND ASY,3T#30 MAGNET 1-490201

L35 430014 INDUCTOR MOLDED MIN 100UH

L36 430014 INDUCTOR MOLDED MIN 100UH

L4 459032 IND ASY,3T#30 MAGNET 1-490201

L40 430014 INDUCTOR MOLDED MIN 100UH

L5 459259 IND,7T-TAP-4T#30 MAG 1-490068

L6 459032 IND ASY,3T#30 MAGNET 1-490201

L7 490109 COIL 12.5T (MD) SQ LG PI CORE

L8 430047 INDUCTOR,0.22 UH MOLDED

MX1 380006 MIXER MINI DOUBLE-BALANCED

Q1 310033 XSTR, J310 N-JFET TO92

Q10 310032 XISTOR,NPN,2N5770,TO92

Q11 310165 XSTR, BFY90 NPN RF TO-72

Q12 310052 XSTR, PN2907A PNP TO92

Q13 310138 XISTOR,FET,VN2222LL,TO92

Q15 310057 XISTOR,NPN,PN2222A,TO92

Q2 310033 XSTR, J310 N-JFET TO92

Q3 310138 XISTOR,FET,VN2222LL,TO92

Q4 310138 XISTOR,FET,VN2222LL,TO92

Q5 310052 XSTR, PN2907A PNP TO92

Q6 310033 XSTR, J310 N-JFET TO92

Q7 310033 XSTR, J310 N-JFET TO92

Q8 310032 XISTOR,NPN,2N5770,TO92

Q9 310033 XSTR, J310 N-JFET TO92

R1 113334 RES,330K 1/8W 5% CARBON FILM

R10 113473 RES,47K 1/8W 5% CARBON FILM

R11 113101 RES,100 OHM 1/8W 5% CF

R12 113152 RES,1.5K 1/8W 5% CARBON FILM

R13 113152 RES,1.5K 1/8W 5% CARBON FILM

R14 113242 RES,2.4K 1/8W 5% CARBON FILM

4-36 TW7000MS

Synthesizer Board 4: Technical Description

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

R15 113153 RES,15K 1/8W 5% CARBON FILM

R16 113103 RES,10K 1/8W 5% CARBON FILM

R17 113101 RES,100 OHM 1/8W 5% CF

R18 113101 RES,100 OHM 1/8W 5% CF

R19 113473 RES,47K 1/8W 5% CARBON FILM

R2 113221 RES,220 OHM 1/8W 5% CF

R20 113334 RES,330K 1/8W 5% CARBON FILM

R21 113471 RES,470 OHM 1/8W 5% CF

R22 113681 RES,680 OHM 1/8W 5% CF

R23 113101 RES,100 OHM 1/8W 5% CF

R24 113470 RES,47 OHM 1/8W 5% CARBON FILM

R25 113151 RES,150 OHM 1/8W 5% CF

R26 113181 RES,180 OHM 1/8W 5% CF

R27 113471 RES,470 OHM 1/8W 5% CF

R28 113223 RES,22K 1/8W 5% CARBON FILM

R29 113101 RES,100 OHM 1/8W 5% CF

R3 113681 RES,680 OHM 1/8W 5% CF

R30 113221 RES,220 OHM 1/8W 5% CF

R31 113122 RES,1.2K 1/8W 5% CARBON FILM

R32 113561 RES,560 OHM 1/8W 5% CF

R33 113680 RES,68 OHM 1/8W 5% CF

R34 113472 RES,4.7K 1/8W 5% CARBON FILM

R35 113334 RES,330K 1/8W 5% CARBON FILM

R36 113473 RES,47K 1/8W 5% CARBON FILM

R37 113222 RES,2.2K 1/8W 5% CARBON FILM

R38 113222 RES,2.2K 1/8W 5% CARBON FILM

R39 113222 RES,2.2K 1/8W 5% CARBON FILM

R4 113151 RES,150 OHM 1/8W 5% CF

R40 113222 RES,2.2K 1/8W 5% CARBON FILM

R41 113102 RES, 1K, 1/8W, 5%, CF

R42 113102 RES, 1K, 1/8W, 5%, CF

R43 113471 RES,470 OHM 1/8W 5% CF

R44 113103 RES,10K 1/8W 5% CARBON FILM

TW7000MS 4-37

4: Technical Description Synthesizer Board

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

R45 113473 RES,47K 1/8W 5% CARBON FILM

R46 113101 RES,100 OHM 1/8W 5% CF

R47 113103 RES,10K 1/8W 5% CARBON FILM

R48 113103 RES,10K 1/8W 5% CARBON FILM

R49 113101 RES,100 OHM 1/8W 5% CF

R5 113221 RES,220 OHM 1/8W 5% CF

R50 113473 RES,47K 1/8W 5% CARBON FILM

R51 113103 RES,10K 1/8W 5% CARBON FILM

R52 113101 RES,100 OHM 1/8W 5% CF

R53 113332 RES,3.3K 1/8W 5% CARBON FILM

R54 113101 RES,100 OHM 1/8W 5% CF

R55 113162 RES, 1.6K OHM 1/8W 5% CF

R56 113822 RES,8.2K 1/8W 5% CARBON FILM

R57 113152 RES,1.5K 1/8W 5% CARBON FILM

R58 113473 RES,47K 1/8W 5% CARBON FILM

R59 113152 RES,1.5K 1/8W 5% CARBON FILM

R6 113181 RES,180 OHM 1/8W 5% CF

R60 113101 RES,100 OHM 1/8W 5% CF

R61 113102 RES, 1K, 1/8W, 5%, CF

R62 113102 RES, 1K, 1/8W, 5%, CF

R63 113102 RES, 1K, 1/8W, 5%, CF

R64 113101 RES,100 OHM 1/8W 5% CF

R65 113101 RES,100 OHM 1/8W 5% CF

R66 113221 RES,220 OHM 1/8W 5% CF

R67 113473 RES,47K 1/8W 5% CARBON FILM

R68 113472 RES,4.7K 1/8W 5% CARBON FILM

R69 113242 RES,2.4K 1/8W 5% CARBON FILM

R70 113470 RES,47 OHM 1/8W 5% CARBON FILM

R71 113472 RES,4.7K 1/8W 5% CARBON FILM

R72 113220 RES,22 OHM 1/8W 5% CARBON FILM

R73 113100 RES,10 OHM 1/8W 5% FILM

R74 113151 RES,150 OHM 1/8W 5% CF

R75 113473 RES,47K 1/8W 5% CARBON FILM

4-38 TW7000MS

Synthesizer Board 4: Technical Description

Table 4-6. Synthesizer Board Parts List (001-00901 Rev. P)

Designator Part Number Description

R76 113473 RES,47K 1/8W 5% CARBON FILM

R9 113103 RES,10K 1/8W 5% CARBON FILM

T17 459258 XFMR,1T-2T#30 MAG 1-490316

T18 459237 XFMR 2T-2T#32 MAG 1-490316

T19 459265 XFMR,2T2T 32 AWG MAG 1-490351

T20 459238 XFMR 2T-8T #32 MAG 2-490201

T21 459237 XFMR 2T-2T#32 MAG 1-490316

T3 459239 XFMR 5T-2T#30 MAG 1-491301

U1 033304017 IC,PLL, DUAL,MC145149, SOG-20

U10 330018 IC,VREG,78L08,TO94,8V

U11 330343 IC, LM317LZ

U12 380013 IC,MAR-2 MONOLITHIC AMPLIFIER

U13 380013 IC,MAR-2 MONOLITHIC AMPLIFIER

U14 330273 IC 74HC595

U15 330105-1 IC, PRE, MC12015, 2 MOD

U2 330417 IC,NE602AN

U3 380011 IC, MAR-6+ RF AMP MICRO-X

U4 330639 IC, MB87086APF PLL SYN SOIC16

U5 330368 IC,MC33078

U6 330471 IC,MAX680

U7 330418 IC,STEL-1179,NCO

U8 ADAPTERBD2 ADAPTER ASSY,330470

U9 330015 IC,VREG,7805,TO220,5V

XL13 490067 INDUCTOR CAN

XL14 490067 INDUCTOR CAN

XL15 490067 INDUCTOR CAN

XL16 490067 INDUCTOR CAN

XL17 490067 INDUCTOR CAN

XL7 490067 INDUCTOR CAN

TW7000MS 4-39

4: Technical Description VSWR Detector Board

4.4 VSWR Detector Board

The VSWR Detector board is located on the rear panel. It is mounted to the
antenna connector and has a pendant 3-wire cable that plugs into the
motherboard at J19.

The board contains reflected and forward power detectors that sample the
transmit RF signal, and send indications of both powers back to the
Reference/Control board for use in the ALC circuitry. Although both transmit
and receive RF pass through this board, it is only used to process signals in the
transmit path.

Reflected

Antenna RF In/Out

Power

Dectector

E2 E1 E1 E3

J19

RVSPWR

2

2

GRD

1

FWDPWR

3

Connector J19 Description

GRD

RVSPWR - Reflected RF power sample
FWDPWR- Forward RF power sample

Forward

Power

Dectector

E4

E5

J2

Figure 4-10. VSWR Detector Board Block Diagram

4-40 TW7000MS

4: Technical Description VSWR Detector Board

Figure 4-11. VSWR Detector Board Component Locations (738293 Rev. F)

4-42 TW7000MS

D

11

Rev:

Sheet of

3030 Enterprise Ct.

Vista, CA 92083

[phone]

Time:

994240

30-Mar-2007 12:02:53994240d.SCH

Date:File:

Schematic

TW7000 VSWR DET

Title:

5-25-97

Date:

SAYLES

Drawn:

Size: Drawing Number:

Date:

Appr:

B

4-43

Figure 4-12

(994240 Rev. D)

Schematic Diagram

VSWR Detector Board

C TW7000-275 REV AND REDRAWN B S 5-25-97

D ECO 05-0457 C1-C4 was .01 RB 01-12-06

REV ECO DESCRIPTION DATE APPR

123

4

ANTENNA

5

R5

47K 1/4W

R4

100 1/4W

1T9T9T

T1

1

J2

2

R3

100 1/4W

C2

.001

C4

D2

1N4148

R7

1T

D1

1N4148

R2

100 1/2W

R1

100 1/2W

3

1K 1/4W

R6

1K 1/4W

C1

.001

J19

DNP

C3

DNP

1

2

3

1. INDUCTANCE IS IN MICROHENRYS

2. DIODES ARE 1N4148

3. CAPACITANCE IS IN MICROFARADS

NOTES: UNLESS OTHERWISE SPECIFIED

4. RESISTANCE IS IN OHMS, 1/8W.

TW7000MS

VSWR Detector Board 4: Technical Description

Table 4-7. VSWR Detector Board Parts List (001-00201 Rev. J)

Designator Part Number Description

C1 275102 CAP,C,.001UF,100V,5%,N,RA,.1SP

C2 275102 CAP,C,.001UF,100V,5%,N,RA,.1SP

D1 320002 DIODE, 1N4148/1N4150 DO-35

D2 320002 DIODE, 1N4148/1N4150 DO-35

J19 610285 HEADER,PIN 1X3 MLX 0.1 W/LOCK

R1 134101 RES,100 OHM 1/2W 5% FILM

R2 134101 RES,100 OHM 1/2W 5% FILM

R3 124101 RES,100 OHM 1/4W 5% CF

R4 124101 RES,100 OHM 1/4W 5% CF

R5 124473 RES,47K 1/4W 5% CARBON FILM

R6 113102 RES, 1K, 1/8W, 5%, CF

R7 113102 RES, 1K, 1/8W, 5%, CF

T1 459316 XFMR ASSY, 9T/9T#30 1-490061

TW7000MS 4-45

4: Technical Description RF Filter Board

4.5 RF Filter Board

The RF Filter board is located on the heat sink assembly and connects via
coaxial cable to the VSWR circuit (J50), the RF Power Amplifier board (J51),
and the 75 MHz IF board (J52). Control interconnects are to the motherboard
at connector J22.

A block diagram of the RF Filter board is shown below. It contains the seven
harmonic filters, the receive/transmit relay, and the receive overload
protection circuit. Connections to the rest of the radio are shown in the table
below.

Connector J22 Description Comment

1, 2 Ground

3, 4 +12V input

5 FB7 Filter band 7 select line

6 FLTTST RF filter BITE line

7 FB3 Filter band 3 select line

9 FB4 Filter band 4 select line

10 TRSW T/R relay control line

11 FB5 Filter band 5 select line

12 FB6 Filter band 6 select line

13 FB2 Filter band 2 select line

14 FB1 Filter band 1 select line

4-46 TW7000MS

RF Filter Board 4: Technical Description

A

NTRF

J50

BND 7 Filter

21 to 30 MHz

.1 to 1.599999 MHz

BND 3 Filter

4.0 to 6.249999 MHz

BND 4 Filter

6.25 to 8.999999 MHz

BND 5 Filter

9.0 to 13.499999 MHz

BND 2 Filter

2.75 to 3.999999 MHz

BND 6 Filter

13.5 to 20.99999 MHz

BND 1 Filter

T/R

Relay

RX/

Overload

Detector

Relay

Driver

Filter
Band

Switch

Circuits

J51

J22-6

J22-8

J52

J22-5

J22-7

J22-9

J22-11

J22-13

J22-12

J22-14

J22-14

TXRFHI

RXRF

FLTTST

TRSW

FB7

FB6

FB5

FB4

FB3

FB2

FB1

Figure 4-13. RF Filter Board Block Diagram

TW7000MS 4-47

4: Technical Description RF Filter Board

Figure 4-14. RF Filter Board Component Locations (738228 Rev. K)

4-48 TW7000MS

N

11

Rev:

FLTTST

+12V

+12V

GND

GND

FB7

FB6

FB5

FB4

FB3

FB2

FB1

08-04-93

03-29-95

05-22-95

07-22-96

12-10-93

04-05-93B

AM

BS

REVERSE J22-8, J22-10

REV CAP VALUES

L20 WAS 14T IS 13T

SEE ECN

L18 7T WAS 8T

CHG K16 CKT

SEE ECN

REDRAWN IN PROTELTW7000-302 10-06-98

7000-040

7000-061

TW7000-186

TW7000-203

TW7000-250

7000-263

TW7000-259

A 7000- 011 RELEASE

CDE

F

GHJ

L C49 WAS 1600pFECO 01-0679 1-04-02BB

K C49 WAS 500pFECO 01-0611 11-16-01BB

M L18 was 7TECO 02-0030 1-29-02BB

REV ECN DESCRIPTION DATE APPR

N SEE ECO05-0061 3-02-05BB

C56

0.1uF

K2A

FB7FB3FB4FB5FB2FB6FB1

2

9

C62

0.1uF

K4A

2

9

C68

0.1uF

K6A

2

9

C74

0.1uF

K8A

2

9

C80

0.1uF

K10A

2

9

C86

0.1uF

K12A

2

9

C92

0.1uF

C98

0.1uF

L40

BEAD

C57

0.1uF

L25

BEAD

C63

0.1uF

L27

BEAD

C69

0.1uF

L29

BEAD

C75

0.1uF

L31

BEAD

C81

0.1uF

L33

BEAD

C87

0.1uF

L35

BEAD

C93

0.1uF

L39

BEAD

C58

0.1uF

C64

C70

C76

0.1uF

C82

C88

C94

C60

0.1uF

K1A

C59

0.1uF

C65

0.1uF

C71

C77

0.1uF

C83

0.1uF

C89

0.1uF

2

9

0.1uF
L26

BEAD

0.1uF
L28

BEAD

0.1uF
L30

BEAD

0.1uF
L32

BEAD

0.1uF
L34

BEAD

0.1uF
L36

BEAD

C61

0.1uF

C66

0.1uF

K3A

C67

0.1uF

2

9

C72

0.1uF

K5A

C73

0.1uF

2

9

C78

0.1uF

K7A

C79

0.1uF

2

9

C84

0.1uF

K9A

C85

0.1uF

2

9

C90

0.1uF

K11A

C91

2

9

0.1uF

C96

0.1uF

T\R\S\W\

14

J22

FB5

FB2

FB1

FB6

12345678910111213

CON14

TRSW

FB3

FB4

FB7

10uF

C105

C101

0.1uF

L41

BEAD

0.1uF

C100

L44

BEAD

+12V

L45

BEAD

+12

D2

+12

L43

BEAD

C103

0.1uF

J51

TXRFHI

J52

(FROM PA MODULE)

(TO 75 MHZ IF MODULE)

K16B

K15A

K16A

D7

MMBD4148

D4

MMBD4148

D6

MMBD4148

D3

MMBD4148

MMBD4148

R8

10K

R3

10K

U1A

2

R1

68K

D5

MMBD4148

MMBD4148

D1

RX RF

R4

K16C

LM2903

8

4

+12

U1C

7

U1B

SPARE GATES

R7

1

LM2903

5

6

Q1

MMB2907

R10

10K

R9

1.0K

PTT

Q2

MMB2907

1.0K

R2

68K

LM2903

3

R6

10K

C55

0.1uF

R5

2.2K,1/2W

2.2K,1/2W

R11

L24

22uH

Figure 4-15

RF Filter Board

Schematic Diagram

100

3030 Enterprise Ct.

Vista, CA 92083

[phone]

4-49

(994139 Rev. N)

Sheet of

Time:

994139

30-Mar-2007 13:18:25994139N.SCH

Date:File:

Date:

Date:

A. MARTINEZ 13 OCT94

Schematic

Appr:

Drawn:

RF FILTER MODULE, TW7000

C

Title:

Size: Drawing Number:

K14A

2

9

1.6-3 to 2.75 MHz 13.5 to 21.0 MHz 2.75 to 4.0 MHz 9.0 to 13.5 MHz 6.25 to 9.0 MHz 4.0 to 6.25 MHz 0 to 1.6 MHz, 21 to 30 MHz

+12V

1

10

K2B

5,6

C7

27pF

10T

39pF

L3

C6

C5

100pF

9T

56pF

L2

C4

C3

130pF

10T

12pF

L1

C2

C1

62pF

BAND 7

5,6

0 to 1.6 MHz, 21 to 30 MHz

1

10

K1B

C95

0.1uF

L37

BEAD

1

10

K4B

5,6

C14

200pF

10T

200pF

L6

C13

C12

500pF

10T

240pF

L5

C11

C10

620pF

10T

56pF

L4

C9

C8

300pF

BAND 3

5,6

4.0 to 6.25 MHz

1

10

K3B

K13A

2

9

L38

BEAD

1

10

K6B

5,6

C21

8T

150pF

L9

C20

C19

8T

180pF

L8

C18

C17

9T

39pF

L7

C16

C15

BAND 4

5,6

6.25 to 9.0 MHz

1

10

K5B

C97

0.1uF

1

10

1

10

K8B

130pF

6T

L12

390pF

6T

L11

430pF

8T

L10

200pF

9.0 to 13.5 MHz

10

K7B

K10B

5,6

C27

C25

C23

BAND 5

5,6

5,6

C28

100pF

10T

100pF

L15

C34

C26

270pF

11T

130pF

L14

C32

C24

270pF

13T

27pF

L13

C30

C22

150pF

BAND 2

5,6

2.75 to 4.0 MHz

1

10

1

K9B

T/R

RELAY

K15B

K15C

1

10

1

10

K12B

C35

330pF

8T

330pF

L18

C33

820pF

8T

390pF

L17

C31

910pF

6T

82pF

L16

1 2

C29

500pF

13.5 to 21.0 MHz

10

K11B

K14B

5,6

C41

C39

C37

BAND 6

5,6

5,6

C49

C42

62pF

62pF

C40

160pF

82pF

C38

180pF

15pF

C36

120pF

1

500pF

13T

470pF

L21

C48

C47

1200pF

13T

620pF

L20

C46

C45

1400pF

15T

130pF

L19

C44

C43

750pF

BAND 1

5,6

1.6-3 to 2.75 MHz

1

10

K13B

J50

ANT RF

TW7000MS

RF Filter Board 4: Technical Description

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V)

Designator Part Number Description

C1 220620 CAP,62PF DM15 MICA

C10 224621 CAP,620PF MICA DM19

C100 021104000 CAP, 0.1UF X7R 25V 5% 0805

C101 021104000 CAP, 0.1UF X7R 25V 5% 0805

C103 021104000 CAP, 0.1UF X7R 25V 5% 0805

C105 022106000 CAP, 10UF TA 35V 10% 7343-31

C11 224241 CAP,240PF DM19 MICA

C12 224501 CAP,500PF DM19 MICA

C13 224201 CAP,200PF DM19 MICA

C14 224201 CAP,200PF DM19 MICA

C15 224201 CAP,200PF DM19 MICA

C16 220390 CAP,39PF DM15 MICA

C17 220431 CAP,430PF DM15 MICA

C18 224181 CAP,180PF 5% DM19 MICA

C19 224391 CAP,390PF DM19 MICA

C2 220120 CAP,12PF DM15 MICA

C20 220151 CAP,150PF DM15 MICA

C21 224131 CAP,130PF DM19 MICA

C22 220151 CAP,150PF DM15 MICA

C23 220270 CAP,27PF 5% DM15 MICA

C24 224301 CAP,300PF DM19 MICA

C25 224131 CAP,130PF DM19 MICA

C26 224271 CAP,270PF 5% DM19 MICA

C27 220101 CAP,100PF DM15 MICA

C28 220101 CAP,100PF DM15 MICA

C29 224501 CAP,500PF DM19 MICA

C3 224131 CAP,130PF DM19 MICA

C30 220820 CAP,82PF DM15 MICA

C31 220911 CAP,910PF DM15 MICA

C32 224391 CAP,390PF DM19 MICA

C33 224821 CAP,820PF DM19 MICA

C34 224331 CAP,330PF DM19 MICA

C35 224331 CAP,330PF DM19 MICA

TW7000MS 4-51

4: Technical Description RF Filter Board

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V)

Designator Part Number Description

C36 220121 CAP,120PF 5% MICA DIPPED

C37 220150 CAP,15PF DM15 5% 500V MICA

C38 224181 CAP,180PF 5% DM19 MICA

C39 220820 CAP,82PF DM15 MICA

C4 220560 CAP,56PF DM15 MICA

C40 220161 CAP,160PF DM15 MICA

C41 220620 CAP,62PF DM15 MICA

C42 220620 CAP,62PF DM15 MICA

C43 224751 CAP, 750PF DM19 MICA

C44 224131 CAP,130PF DM19 MICA

C45 224142 CAP,1400PF DM19 MICA

C46 224621 CAP,620PF MICA DM19

C47 224122 CAP.1200PF MICA DM19

C48 224471 CAP,470PF DM19 MICA

C49 224501 CAP,500PF DM19 MICA

C5 220101 CAP,100PF DM15 MICA

C55 021104000 CAP, 0.1UF X7R 25V 5% 0805

C56 021104000 CAP, 0.1UF X7R 25V 5% 0805

C57 021104000 CAP, 0.1UF X7R 25V 5% 0805

C58 021104000 CAP, 0.1UF X7R 25V 5% 0805

C59 021104000 CAP, 0.1UF X7R 25V 5% 0805

C6 220390 CAP,39PF DM15 MICA

C60 021104000 CAP, 0.1UF X7R 25V 5% 0805

C61 021104000 CAP, 0.1UF X7R 25V 5% 0805

C62 021104000 CAP, 0.1UF X7R 25V 5% 0805

C63 021104000 CAP, 0.1UF X7R 25V 5% 0805

C64 021104000 CAP, 0.1UF X7R 25V 5% 0805

C65 021104000 CAP, 0.1UF X7R 25V 5% 0805

C66 021104000 CAP, 0.1UF X7R 25V 5% 0805

C67 021104000 CAP, 0.1UF X7R 25V 5% 0805

C68 021104000 CAP, 0.1UF X7R 25V 5% 0805

C69 021104000 CAP, 0.1UF X7R 25V 5% 0805

C7 220270 CAP,27PF 5% DM15 MICA

4-52 TW7000MS

RF Filter Board 4: Technical Description

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V)

Designator Part Number Description

C70 021104000 CAP, 0.1UF X7R 25V 5% 0805

C71 021104000 CAP, 0.1UF X7R 25V 5% 0805

C72 021104000 CAP, 0.1UF X7R 25V 5% 0805

C73 021104000 CAP, 0.1UF X7R 25V 5% 0805

C74 021104000 CAP, 0.1UF X7R 25V 5% 0805

C75 021104000 CAP, 0.1UF X7R 25V 5% 0805

C76 021104000 CAP, 0.1UF X7R 25V 5% 0805

C77 021104000 CAP, 0.1UF X7R 25V 5% 0805

C78 021104000 CAP, 0.1UF X7R 25V 5% 0805

C79 021104000 CAP, 0.1UF X7R 25V 5% 0805

C8 224301 CAP,300PF DM19 MICA

C80 021104000 CAP, 0.1UF X7R 25V 5% 0805

C81 021104000 CAP, 0.1UF X7R 25V 5% 0805

C82 021104000 CAP, 0.1UF X7R 25V 5% 0805

C83 021104000 CAP, 0.1UF X7R 25V 5% 0805

C84 021104000 CAP, 0.1UF X7R 25V 5% 0805

C85 021104000 CAP, 0.1UF X7R 25V 5% 0805

C86 021104000 CAP, 0.1UF X7R 25V 5% 0805

C87 021104000 CAP, 0.1UF X7R 25V 5% 0805

C88 021104000 CAP, 0.1UF X7R 25V 5% 0805

C89 021104000 CAP, 0.1UF X7R 25V 5% 0805

C9 220560 CAP,56PF DM15 MICA

C90 021104000 CAP, 0.1UF X7R 25V 5% 0805

C91 021104000 CAP, 0.1UF X7R 25V 5% 0805

C92 021104000 CAP, 0.1UF X7R 25V 5% 0805

C93 021104000 CAP, 0.1UF X7R 25V 5% 0805

C94 021104000 CAP, 0.1UF X7R 25V 5% 0805

C95 021104000 CAP, 0.1UF X7R 25V 5% 0805

C96 021104000 CAP, 0.1UF X7R 25V 5% 0805

C97 021104000 CAP, 0.1UF X7R 25V 5% 0805

C98 021104000 CAP, 0.1UF X7R 25V 5% 0805

D1 037700005 DIODE, MMBD4148 SOT-23

D2 037700005 DIODE, MMBD4148 SOT-23

TW7000MS 4-53

4: Technical Description RF Filter Board

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V)

Designator Part Number Description

D3 037700005 DIODE, MMBD4148 SOT-23

D4 037700005 DIODE, MMBD4148 SOT-23

D5 037700005 DIODE, MMBD4148 SOT-23

D6 037700005 DIODE, MMBD4148 SOT-23

D7 037700005 DIODE, MMBD4148 SOT-23

J22 620017 HEADER, 2X7 MLX 0.1 BOX PLAIN

J50 614026 CONN,RF FEMALE LOW-TYPE RECEPT

J51 614026 CONN,RF FEMALE LOW-TYPE RECEPT

J52 614026 CONN,RF FEMALE LOW-TYPE RECEPT

K1 540077 RELAY,SP PCB MOUNT

K10 540077 RELAY,SP PCB MOUNT

K11 540077 RELAY,SP PCB MOUNT

K12 540077 RELAY,SP PCB MOUNT

K13 540077 RELAY,SP PCB MOUNT

K14 540077 RELAY,SP PCB MOUNT

K15 540080 RELAY,DPDT 2 AMP SEALED

K16 540080 RELAY,DPDT 2 AMP SEALED

K2 540077 RELAY,SP PCB MOUNT

K3 540077 RELAY,SP PCB MOUNT

K4 540077 RELAY,SP PCB MOUNT

K5 540077 RELAY,SP PCB MOUNT

K6 540077 RELAY,SP PCB MOUNT

K7 540077 RELAY,SP PCB MOUNT

K8 540077 RELAY,SP PCB MOUNT

K9 540077 RELAY,SP PCB MOUNT

L1 459325 IND ASSY,10T,#20,1-490006

L10 451122 IND ASSY,8T#20 1-490008

L11 459424 IND ASSY,6T#20 1-490008 COMPRS

L12 459424 IND ASSY,6T#20 1-490008 COMPRS

L13 459119 IND ASSY, 13T#22 1-490009

L14 459103 IND ASSY,11T#22,AWG,1-490009

L15 459174 IND ASSY,10T#22 AWG 1-490009

L16 459131 IND ASSY, 6T#20 AWG 1-490008

4-54 TW7000MS

4: Technical Description

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V)

Designator Part Number Description

L17 451127 IND ASSY, 8T#20 1-490010

L18 459425 IND ASSY,8T#20 1-490010 COMPRS

L19 451115 IND ASSY,15T#22 1-490009

L2 459326 IND ASSY,9T,#20,2-490104

L20 459119 IND ASSY, 13T#22 1-490009

L21 459119 IND ASSY, 13T#22 1-490009

L24 041223000 IND SM 22UH 1210 10%

L25 045000001 BEAD, FERRITE Z=120 1206

L26 045000001 BEAD, FERRITE Z=120 1206

L27 045000001 BEAD, FERRITE Z=120 1206

L28 045000001 BEAD, FERRITE Z=120 1206

L29 045000001 BEAD, FERRITE Z=120 1206

L3 459325 IND ASSY,10T,#20,1-490006

L30 045000001 BEAD, FERRITE Z=120 1206

L31 045000001 BEAD, FERRITE Z=120 1206

L32 045000001 BEAD, FERRITE Z=120 1206

L33 045000001 BEAD, FERRITE Z=120 1206

L34 045000001 BEAD, FERRITE Z=120 1206

L35 045000001 BEAD, FERRITE Z=120 1206

L36 045000001 BEAD, FERRITE Z=120 1206

L37 045000001 BEAD, FERRITE Z=120 1206

L38 045000001 BEAD, FERRITE Z=120 1206

L39 045000001 BEAD, FERRITE Z=120 1206

L4 459134 IND ASSY, 10T#22 AWG 1-490008

L40 045000001 BEAD, FERRITE Z=120 1206

L41 045000001 BEAD, FERRITE Z=120 1206

L43 045000001 BEAD, FERRITE Z=120 1206

L44 045000001 BEAD, FERRITE Z=120 1206

L45 045000001 BEAD, FERRITE Z=120 1206

L5 459134 IND ASSY, 10T#22 AWG 1-490008

L6 459134 IND ASSY, 10T#22 AWG 1-490008

L7 459120 IND ASSY,9T#22 1-490008

L8 459105 IND ASSY, 8T#22 AWG 1-490008

TW7000MS 4-55

4: Technical Description RF Filter Board

Table 4-8. RF Filter Board Parts List (001-00320 Rev. V)

Designator Part Number Description

L9 459105 IND ASSY, 8T#22 AWG 1-490008

Q1 032006 XSTR,MMBT2907A PNP SOT-23EBC

Q2 032006 XSTR,MMBT2907A PNP SOT-23EBC

R1 013683000 RES,SM,CF,68K 0.1W 5% 0805

R10 013103002 RES,SM,TK,10K,1%,1/8W,0805

R11 013101002 RES, 100 OHM 1/8W 1% TK 0805

R2 013683000 RES,SM,CF,68K 0.1W 5% 0805

R3 013103002 RES,SM,TK,10K,1%,1/8W,0805

R4 019222002 RES,SM,2.2K,1/2W,5%,2010

R5 019222002 RES,SM,2.2K,1/2W,5%,2010

R6 013103002 RES,SM,TK,10K,1%,1/8W,0805

R7 013102002 RES, 1K OHM 1/8W 1% TK 0805

R8 013103002 RES,SM,TK,10K,1%,1/8W,0805

R9 013102002 RES, 1K OHM 1/8W 1% TK 0805

U1 033304061 IC,SM,LIN,COMPAR,DUAL,LM2903MX

4-56 TW7000MS