Datron TW7000MS User 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: [email protected]
www.dtwc.com

TW7000MS i
Change Description
Date of
Revision
Revision
Letter Description of Changes Pages Affected
2/2005 E Information regarding updated boards, schematics,
part lists including the new Processor board,
Ref/Control board and the High Stability option.
All
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.
All

TW7000MS iii
© 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 there-
fore, 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, nontrans-
ferable 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 war-
ranty that covers the media upon which the Software is embed-
ded 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

iv TW7000MS
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 ground-
ing.
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 man-
ual 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

TW7000MS v
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

vi TW7000MS
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

TW7000MS vii
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

viii TW7000MS
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

TW7000MS ix
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 1-1
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.

1: Introduction
1-2 TW7000MS
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
1000.
7000ALE FED-STD-1045 compatible adaptive system. Provides
complete 1045 capability, including link quality analysis,
auto-linking, sounding, and orderwire message transmission
and reception.
7000CLK Internal clock keeps and displays the time and includes alarm
features.
7000CW Narrowband filter with 500 Hz bandwidth for CW operation.
7000ENCR High-level voice encryptor uses enhanced domain transform
(EDT) ciphering techniques providing long-term security.
7000FALC Fast ALC loop for use with linear amplifiers like the
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: Introduction
TW7000MS 1-3
7000VEM DSP-based voice enhancement provides superior voice
recognition and signal-quality improvement in noisy
environments.
7000WB1 Wideband data filter providing 300 to 3300 Hz with tailored
group delay characteristics for data operation.
TW7000AIRSELCALL
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-to-
air SELCALL 3-tone system.
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.
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.

1: Introduction
1-4 TW7000MS
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
From front panel or remotely via computer or
dedicated remote control console
Frequency Stability 0.5 ppm
Modes USB, LSB, CW, AME; simplex or half-duplex
Input Power 11 to 15.5 Vdc
Input Power
Protection
Reverse polarity, transient and under/over voltage
Antenna Port SO-239
Antennas 50 ohms or automatic antenna tuner (AT7000,
RAT1000C)
Interface Control: two RS32 COM ports; compatible with
EIA RS422/423/485 with option.
Audio: 600 ohms, balanced and isolated

1: Introduction
TW7000MS 1-5
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)
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
Characteristic Specification

TW7000MS 2-1
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.

2: Installation
2-2 TW7000MS
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:
The input impedance is a nominal 150 ohm. Most dynamic, ceramic, or
magnetic microphones operate satisfactorily with the TW7000. All DWC-
supplied 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:
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
Part Number Description
PM Heavy-duty palm microphone
DM Dynamic desk microphone
KEY Morse key
EP Headphones
EPL Lightweight headphones
Pin Number Description
1 Ground
2 RX audio (unmuted)
3PTT
4 TX audio
5 CW key line
6 +12 Vdc