Datron TW7201I Service guide

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TW7201I-MS

TW7201I

DHSL Remote Control Head Operator/Technical Manual

Datron World Communications Inc.

Manual Part No. TW7201I-MS

Release Date: January 2008

Revision: E

3030 Enterprise Court

Vista, CA 92081, U.S.A.

Phone: (760) 597-1500 Fax: (760) 597-1510

E-Mail: sales@dtwc.com

www.dtwc.com

Change Description

Date of Revision

Revision Letter

Description of Changes

Pages Affected

01/08 E Change ISDN designation to DHSL. All

TW7201I-MS i

Datron World Communications, Inc.

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, 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

TW7201I-MS 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 ST ATED 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 Worl d Communications Inc., 3030 Enterprise Court, Vista, California 92081. 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 W orld Communications Inc., 3030 Enterprise Court, Vista, California 92081; 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 ener gy 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 TW7201I-MS

Chapter 1: Introduction

1.1 The TW7201I DHSL Remote Control Head. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.3 TW7000 Series Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.4 Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.5 Referenced Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2: Installation

2.1 Installation Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 The TW7000 Transceiver and 7000RI Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.3 Audio Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Table 2-1 Audio Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-1 TW7201I Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-2 Microphone Jack J9 and J10 Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Table 2-2 Microphone Connector (J9) and (J10) Pin Assignments . . . . . . . . . . . . . . . . . . . . . 2-3

2.4 Rear Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-3 TW7201I Rear Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-4 AC Voltage Selector Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-5 DB9 Remote Connector Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-6 DB Accessory Connector Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Table 2-3 ACC 1 Accessory Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Table 2-4 ACC 2 Accessory Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Chapter 3: Operation

3.1 Powering the TW7201I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

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

3.2 Using Knobs, Buttons and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.3 VSWR Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.4 Using Menus to Change Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Table 3-1 Alpha Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Table 3-2 ALE Submenu - ALPHA 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

3.5 Programming Channels and Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

3.6 Scanning (for TA/TC only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

3.7 Placing an ALE Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

3.8 Placing a TransAdapt, Transcall or Selcall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

3.9 Activating the Noise Blanker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

3.10 Activating Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

3.11 Activating Voice Enhancement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

TW7201I-MS v

Chapter 4: Theory of Operation

4.1 TW7201I Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Figure 4-1 TW7201I Remote System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 Front panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Figure 4-2 Front Panel Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Table 4-1 Jumper Block J11 Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.3 Rear Panel Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Figure 4-3 Power Supply/Interface Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Figure 4-4 DHSL Modem Board Block Diagram (Remote Head). . . . . . . . . . . . . . . . . . . . . . . 4-9

4.4 7000RI Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Figure 4-5 DHSL Modem Board Block Diagram (Transceiver) . . . . . . . . . . . . . . . . . . . . . . . 4-12

Chapter 5: Testing and Troubleshooting

Table 5-1 TW7201I Subassemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1 Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3 Component Locations, Pin Assignments, Schematics and Part Lists . . . . . . . . . . . 5-6

Table 5-2 Front Panel Processor J1 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-3 Front Panel Processor J3 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-4 Front Panel Processor J4 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-5 Front Panel Processor J5 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-6 Front Panel Processor J6 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-7 Front Panel Processor J7 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Table 5-8 Front Panel Processor J8 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Table 5-9 Front Panel Processor J9 and J10 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Figure 5-1 Front Panel Processor Board Component Locations (738207 Rev. J) . . . . . . . . . . 5-10

Figure 5-2 Front Panel Processor Board Schematic Diagram (994359 Rev. E). . . . . . . . . . . . 5-11

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E) . . . . . . . . . . . . . . . . . 5-13

Table 5-11 DHSL Modem J1 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Table 5-12 DHSL Modem J2 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Table 5-13 DHSL Modem J3 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Table 5-14 DHSL Modem J4 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Table 5-15 DHSL Modem J11 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Table 5-16 DHSL Modem J12 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Table 5-17 DHSL Modem Board Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23

Figure 5-3 DHSL Modem Board Component Locations (738248 Rev. E) . . . . . . . . . . . . . . . 5-24

Figure 5-4 DHSL Modem Board Schematic Diagram (994184 Rev. E) . . . . . . . . . . . . . . . . . 5-25

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L). . . . . . . . . . . . . . . . . . . . . . . 5-27

Table 5-19 Power Supply/Interface Board J1 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 5-33

Table 5-20 Power Supply/Interface Board J2 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 5-33

Table 5-21 Power Supply/Interface Board J3 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 5-33

Table 5-22 Power Supply/Interface Board J5 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 5-34

Table 5-23 Power Supply /Interface Board J6 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 5-35

Table 5-24 Power Supply /Interface Board J7 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 5-36

Table 5-25 Power Supply /Interface Board J8 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 5-37

Table 5-26 Power Supply /Interface Board J9 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 5-37

Table 5-27 Power Supply /Interface Board J10 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . 5-37

Figure 5-5 Power Supply/Interface Board Component Locations (738277 Rev. B) . . . . . . . . 5-38

Figure 5-6 Power Supply/Interface Board Schematic Diagram (994222 Rev. D) . . . . . . . . . . 5-39

Table 5-28 Power Supply/Interface Board Parts List (003-03005 Rev. G) . . . . . . . . . . . . . . . 5-41

vi TW7201I-MS

Figure 5-7 Switching Board Component Locations (738195 Rev. B) . . . . . . . . . . . . . . . . . . . 5-44

Figure 5-8 Switching Board Schematic Diagram (994149 Rev. A). . . . . . . . . . . . . . . . . . . . . 5-45

Table 5-29 Switch Board Parts List (001-00110 Rev. A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-47

TW7201I-MS vii

CHAPTER 1

INTRODUCTION

1.1 The TW7201I DHSL Remote Control Head

The TW7201I is the Datron High Speed Link (DHSL) remote control unit that uses a high speed modem to provide remote operation of the TW7000 series transceivers configured with the 7000RI option over a two-wire line. The TW7201I includes a DHSL modem that communicates with its DHSL counterpart (7000RI modem option) in the TW7000(F) transceiver.

The TW7201I is microprocessor controlled and features one full-duplex digitized voice channel and two full-duplex data channels.

The TW7201I remote control head includes the following features:

• Full remote control and operation of TW7000 series transceivers

• Dual front panel microphone jacks

• Front panel LCD

• Alphanumeric keypad and function buttons

• Dual rear panel accessory connectors

• AC and DC power source support

TW7201I-MS 1-1

1: Introduction

1.2 Specifications

Note: All specifications subject to change without notice or obligation.

Characteristic Description General

Transmission type High speed modem and audio. Modem channels 2 data channels, 1 voice channel. Range 2 km (maximum). Control Controls TW7000 series HF transceivers with

Display Front panel LCD. Audio Internal loudspeaker (2W output). Input power

AC DC

7000RI option.

120 VAC or 240 VAC.

13.8 Vdc.

Protection Fused for AC and DC, overvoltage and reverse

polarity.

Modem

Format High speed slave modem (MC145426) in remote

head, master modem (MC145422) in transceiver. Data 256 kHz modified differential phase shift burst. Channels

voice

One full-duplex 64 kb/second digitized voice

channel.

data

Two full-duplex 9600 baud data channels. Remote interface 2-wire (maximum distance 2 km).

Physical

Size (HWD) 10.16 cm x 33.02 cm x 15.24 cm.

(4 in. x 13 in. x 6 in.). Weight 3.175 kg (7 lbs.).

Environmental

Temperature

operating storage

–30° C to +60° C.

–40° C to +70° C.

1-2 TW7201I-MS

1.3 TW7000 Series Family

The TW7000 series is a complete family of RF communications equipment that includes the following components:

• Transceivers (TW7000, TW7000F)

• Internal options

• External options

• Accessories

• Remote control devices The TW7201I modem operates in conjunction with an DHSL modem (7000RI

option) installed in a TW7000 series transceiver. The two modems connect through a 2-wire remote line.

1.3.1 Front Panel

Control

When using transceivers such as the TW7000 that include front panel controls, the transceiver controls are the master. In this case, the transceiver controls are live from the transceiver and TW7201I. For security and limited operation applications, the key functions can be inhibited at either the transceiver or TW7201I control panels. Two variations of the TW7000 series transceivers, the TW7000E and TW7000C, do not include control panels.

1: Introduction

1.3.2

7000RI Option The TW7000 series transceiver must have a 7000RI option installed to

communicate with the TW7201I remote head. The 7000RI option includes the DHSL Modem board, and a dual UART chip and two jumpers that must be installed on the transceiver Processor board.

1.3.3 TW7201I

DHSL Remote Control

Voice Channel The TW7201I provides one voice channel. The voice audio is digitized before

Data Channels The TW7201I provides two data channels, using one channel for

The TW7201I includes a DHSL Modem board that communicates with the DHSL Modem board (7000RI option) installed in the transceiver through a remote line using a high speed data packet format. The information is compressed and sent between the master (transceiver) and slave (remote head). Line loss and balance variations do not effect the system performance. The DHSL modem requires wide bandwidth so it does not work over standard analog telephone channel. This system is ideal for distances of 1.6 or less (2

being sent over the modem link. This provides excellent voice quality even with poor line conditions and requires no adjustment even when line conditions change.

communications between the transceiver and the remote head. The other data channel is a spare, normally used by accessory equipment or other special functions. The second channel is typically used for an external computer

km max.) over a 2-wire pair.

km (1 mile)

TW7201I-MS 1-3

1: Introduction

control device. This configuration allows for full computer control of the transceiver at the remote control head. Both channels are high speed data channels with a 9600 N81 standard interface.

Operating Modes The TW7201I is designed to be a high speed modem link to the transceiver for

both voice and data. The high speed characteristic allows for a wide variety of voice and data capabilities. The TW7201I supports all standard operating modes including USB, LSB, CW, PCS, and AME.

1.3.4 Options and

Accessories

The TW7201I supports the following accessories:

• PM palm microphone for voice operation

• DM desk microphone for voice operation

• KEY CW key

• EPL lightweight headset

• TW7201MM mobile mounting kit

• TW7201RM rack mounting kit The TW7201I is supported with the following optional maintenance and

service items:

• TW7201I-TK tool kit

• TW7201I-MRK module repair kit

• TW7201I-MK module kit

• TW7201I-PSK spare parts kit

1.3.5 Accessory

Equipment

The TW7201I supports the following optional external devices through the rear panel accessory connectors:

• Telephone couplers

• Data terminals

• Voice encryptors

• External speaker

1.4 Manual Conventions

Bold type denotes all items that appear in the display and for any button, knob or switch on the front panel. For example:

• Press ALPHA 17, then press E.

• Press 1 to set the status to OFF.

1-4 TW7201I-MS

1.5 Referenced Manuals

• RC2-MSOP Radio Control 2 Operator Manual

• 7000ENCR-MSOP 7000-Series High-level Encryption Operator Manual

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

1: Introduction

TW7201I-MS 1-5

CHAPTER 2

INSTALLATION

2.1 Installation Types

The TW7201I can be installed in the following configurations:

• Desktop

• Mobile

• Rack The desktop model is the standard configuration for the TW7201I and requires

no additional mounting hardware. For vehicle and marine applications, the TW7201I can be ordered with mobile

mounting brackets (TW7201MM) that are designed for either top or bottom mounting.

For rack mount applications, the TW7201I can be ordered with the rack mount kit (TW7201RM).

For local operation, the TW7201I requires a 2-wire line between the remote head and the transceiver. The line connections are transformer-coupled at each end. The line length is limited by the time delay of the high speed packets as they travel from each end. Datron offers the C992307 10m (33 ft.) DHSL interface cable.

Datron offers an unterminated remote cable (C992309) for connecting to pre-existing wiring system. T wo C992309 cables would be required: one for the transceiver; the other for the TW7201I.

2.2 The TW7000 Transceiver and 7000RI Option

To use the TW7201I with a TW7000 series transceiver, the transceiver must have the 7000RI option installed. This option includes the DHSL Modem board, a serial dual UART IC and jumpers that are installed on the transceiver Processor board. The remote system uses a 2-wire cable between the transceiver and the remote head.

TW7201I-MS 2-1

2: Installation

2.3 Audio Connections

The TW7201I front panel hosts two 6-pin microphone connectors. These two connectors are wired in parallel and are compatible with various audio accessories. The input impedance is 150 ohms (nominal). The TW7201I supports most dynamic, ceramic and magnetic microphones.

Part Number Description

DM Dynamic desk microphone PM Heavy-duty hand microphone HP Headphones, twin EP Headphones EPL Lightweight headphones KEY CW key (Morse key)

All Datron audio accessories have the correct mating connector . Datron of fers mating adapters for other low-level audio accessories.

Table 2-1 Audio Devices

OPTIONS

STATUS

PRICALLSCAN TUNE

POWER

AUDIO CONNECTORS

OFF

Figure 2-1 TW7201I Front Panel

Figure 2-2 Microphone Jack J9 and J10 Pinouts

J K

S T

/ \

P Q

S P

E F

CLAR (PUSH)

2-2 TW7201I-MS

Table 2-2 Microphone Connector (J9) and (J10) Pin Assignments

Pin Description Pin Description

1 GND 4 TX AUDIO 2 RX AUDIO 5 CW 3 PTT 6 +12 Vdc

2.4 Rear Panel Description

The rear panel provides the AC and DC power connections and fuse blocks, accessory connectors and the remote line connector to the transceiver.

2: Installation

13.8VDC DC INPUT

AC INPUT

Fuse

Pull

ACCESSORY 1

ACCESSORY 2

FUSE

GND

REMOTE

Figure 2-3 TW7201I Rear Panel

2.4.1

Input Power The TW7201I can accept input power from either an AC or DC power source.

AC Power The rear panel includes a standard IEC AC power connector that can be

configured for 120 or 240 VAC. A standard AC power cable is included with the TW7201I (769004 IEC320 to NEMA 5-15). The AC connector includes a fuse holder and the AC voltage selector card. The AC fuse should be a 1A slow blow 3AG fuse (550014).

The AC power voltage selector card must be configured for the intended power source. The AC power is preconfigured for the AC power level in the area where it is shipped.

CAUTION: Always verify the correct AC power setting on the AC voltage selector card before applying AC power.

To reconfigure the AC power setting:

1. Move the clear plastic fuse cover to the left so that it covers the AC power connector. The AC voltage selector card is located just below the fuse. The current AC power setting is visible on the voltage selector card.

TW7201I-MS 2-3

2: Installation

2. Pull the fuse ejector tab toward you and to the left. This forces the fuse partially out of the fuse holder.

3. Remove the fuse.

4. Using a long nose pliers, remove the AC voltage selector card.

5. Orient the card to the correct AC level to be used. The voltage selector card has two numbers on each side corresponding to AC power levels, 100 and 220 on one side, and 120 and 240 on the other side. To get the correct setting, hold the voltage selector card toward the AC connector/fuse holder, with the correct setting facing you as shown in Figure 2-4 below. In this example the TW7201I is configured for 220 VAC.

Fuse

Pull

Figure 2-4 AC Voltage Selector Card

6. Insert the card below the fuse holder, install the fuse and push the fuse extractor handle back into the fuse holder.

7. Slide the fuse cover to the right to cover the fuse holder. Install the AC power cable into the AC power connector.

DC Power The TW7201I rear panel also includes a DC power connector and fuse holder.

The DC input circuitry is designed for 13.8 Vdc with a typical current requirement of approximately 300

Vdc to 16 Vdc. An optional 2m (6.5 ft.) 3-conductor DC power cable is

is 12

mA. The recommended DC voltage range

available (C991829). One end of the DC power cable is left without a plug for convenient connection to a variety of DC power sources.

The DC fuseholder should include a 3A 250VAC fast 3AG fuse (550003) and a spare fuse of the same rating. To access the fuse, push to the left on the fuseholder cover and pull out.

2.4.2 Remote

Connector

The TW7201I communicates with the TW7000 series transceiver through a 10m (33 ft.) remote cable (C992307). The remote cable connects to the TW7201I through the rear panel 9-pin D Submini socket. The FSK remote head uses the same remote cable.

2-4 TW7201I-MS

2: Installation

The 2-wire DHSL system uses the DHSL1 and DHSL2 lines to communicate between the remote head and the transceiver. The following table provides the pin assignments for the remote connector.

Note: Datron offers an unterminated remote cable (C992309) for connecting to pre-existing wiring system. Two C992309 cables would be required: one for the transceiver; the other for the TW7201I.

Note: The C992307 remote cable is actual ly a 9-conductor cable. The DHSL modem in the remote head uses only two of the nine wires to communicate with the transceiver DHSL modem.

2.4.3 Accessory

Connectors

Figure 2-5 DB9 Remote Connector Pinout

Pin Signal Pin Signal

1 GND 6 DHSL2 2 Not used 7 REMRXA (not used) 3 Not used 8 REMTXA (not used) 4 Not used 9 Not used 5 DHSL1

The rear panel hosts two DB25 accessory connectors ACC 1 and ACC 2 (refer to T able 2-3 on page 2-7 and Table 2-4 on page 2-8) that support the following accessories:

• External encryption devices

• Audio interface devices

• Data terminal equipment (DTE)

• External speaker

Encryption Devices

Audio Interface Devices

An external encryption device can connect to either connector ACC 1 or

ACC 2.

Audio interface devices such as Datron’ s ACU1000 and ACU-T can use either accessory connector.

DTEs The TW7201I can interface with data terminal equipment (computers)

through accessory connector

ACC 1. The TW7201I includes two data

channels—the main channel provides full transceiver control; the spare channel is designed to interface with a computer (DTE) (data transmission only) so it can use RC2 or DatronLINK to operate and control the TW7000.

TW7201I-MS 2-5

2: Installation

Note: DatronLINK is a proprietary data network management and messaging program designed to automate message file transfers over radio links, LANs and through the Internet.

External Speaker The TW7201I includes a standard speaker mounted on the inside of the front

panel. An external loudspeaker can be added to the transceiver through the

ACC 2 accessory connector.

Note: If using the optional external speaker, turn off the internal speaker

(push the SPKR button; the status icon displayed on the LCD above the SPKR button should be set to OFF).

2-6 TW7201I-MS

14 25

2: Installation

Figure 2-6 DB Accessory Connector Pinout

Table 2-3 ACC 1 Accessory Connector Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 COM1RXD Receive data line for DTE connection 3 NC No connection 4 COM1TXD Transmit data line for DTE connection 5 NC No connection 6 BALRXA1 Balanced line receive audio 1 7 BALRXA2 Balanced line receive audio 2 8 BALTXA1 Balanced line transmit audio 1 9 BALTXA2 Balanced line transmit audio 2 10 EXAUDPTT\ External audio PTT (active low) 11 NC No connection 12 NC No connection 13 +12V ACC +12 Vdc supply for the accessory devices 14 EXTCWKEY External CW key 15 NC No connection 16 DCD Not used 17 FPWSP1 Front panel spare port (not used) 18 NC No connection 19 NC No connection 20 NC No connection 21 NC No connection 22 NC No connection 23 NC No connection 24 NC No connection 25 NC No connection

TW7201I-MS 2-7

2: Installation

Table 2-4 ACC 2 Accessory Connector Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 GND Chassis ground 3 PWRON\ Remote power on/off (active low) 4 NC No connection 5 NC No connection 6 BALRXA1 Balanced line receive audio 1 7 BALRXA2 Balanced line receive audio 2 8 BALTXA1 Balanced line transmit audio 1 9 BALTXA2 Balanced line transmit audio 2 10 EXAUDPTT\ External audio PTT (active low) 11 NC No connection 12 NC No connection 13 +12V ACC +12 Vdc supply for the accessory devices 14 GND Chassis ground 15 NC No connection 16 DCD Not used 17 NC No connection 18 NC No connection 19 NC No connection 20 TC/SCALM Transcall/Secall alarm 21 NC No connection 22 EXTSPKR External speaker audio 23 NC No connection 24 +12V ACC +12 Vdc supply for the accessory devices 25 +12V ACC +12 Vdc supply for the accessory devices

2-8 TW7201I-MS

CHAPTER 3

OPERATION

The procedures discussed in this chapter use the TW7201I front panel to program the TW7000 series transceiver.

Note: The TW7000 transceiver must be powered on to program the

transceiver from the TW7201I.

To program the transceiver from a computer, refer to the Radio Control 2 Operator Manual (RC2-MSOP); the 7000ALE option must be installed in the radio.

3.1 Powering the TW7201I

To turn the TW7201I and TW7000 (or TW7000F) on, turn the PWR OFF/VOL knob clockwise until an audible click is heard. Power is off in the full counterclockwise position. When the transceiver is turned on, the LCD displays the software version level.

Display: TW7000 VER 701xx (where xx is the version level)

The BITE system runs automatically and verifies that the boards are functional.

Display: TW7000 OK

MODULES

The BITE system searches for any installed options. The LCD displays the following information:

• Options

• Current channel number (upper left corner)

• Channel frequency (upper center)

• Clarifier offset (if any, below the frequency).

TW7201I-MS 3-1

3: Operation

Channe

Atten-

uator

Call

xterna

Amplifier

Squelch

Tune

Priority

Alpha

Speaker

Send

Internal

Options

RF Power

Level

Scan

Group

Scan

Mode

Select

Figure 3-1 TW7000 Front Panel

Keypad

Power/

Volume

Clarifier

3.2 Using Knobs, Buttons and Indicators

Front panel knobs, buttons and displayed indicators provide TW7201I function control and status including access to advanced features from menus. For the knob, button and indicator locations, refer to Figure 3-1 above.

3.2.1

Power/Volume The PWR/VOL knob provides power to the TW7201I. It also provides volume

control for the internal speaker. To increase volume, turn the knob clockwise.

3.2.2

Clarifier The CLAR knob provides frequency fine tuning by adjusting the channel

frequency to clarify the signal. The knob has continuous rotation and provides a maximum of -600 Hz and +600 Hz offset in 10 Hz steps. Turn the knob counterclockwise for negative offset and clockwise for positive offset (USB mode). The offset value is displayed on the right side of the LCD and is nulled by turning the knob until the offset reads +000 Hz, or by pressing the knob (off). When the clarifier is off, no clarifier information is displayed. Pressing the knob a second time restores the previous offset and refreshes the display.

PWR OFF/VOL

CLAR

3-2 TW7201I-MS

3.2.3

Keypad The keypad provides the following operations:

• Enters numeric or alpha characters

• Saves data

• Selects channels and frequencies

• Scrolls within menus

3: Operation

Entering Numbers

Entering Text

To enter numbers:

1. Press the desired keypad number. The display has a permanent decimal and comma in the frequency field.

2. If a value is entered that is below

10.000000 MHz, use the decimal button.

Alpha characters are entered using a combination of two buttons. For example:

1. On the keypad, press the top bracketed button, then 1 to enter character A.

2. Press the middle bracketed button, then 1 to enter character B.

3. Press the bottom bracketed button, then 1 to enter character C.

Scroll up Scroll left

Scroll dow Scroll right

Enter

Frequency

Channel

Editing Text To enter a space, press any bracketed button, then 0.

To delete a character, use the left and right arrows to position the cursor, then press the C button. All trailing characters move to the left.

Menu Navigation To scroll through the menu selections, use the up and down arrow buttons.

These arrows convert to left and right scrolling when editing in the text message mode. The scrolling rate remains constant while an arrow button is held down. The arrows remain active until another control function is selected.

Channel and Frequency Selection

The C, F, and E buttons enter channel and frequency information into memory. To select a channel:

1. Press the C button.

2. Enter the channel number using the keypad.

TW7201I-MS 3-3

3: Operation

3. Press E to enter the channel selection.

To select a frequency:

1. Press the F button.

2. Enter the frequency.

3. Press E to enter the frequency into memory.

3.2.4 Function

Buttons

The TW7201I front panel includes preprogrammed function buttons such as

CALL, SEND, TUNE and ALPHA. The LCD displays the icons at the left and

bottom section of the LCD.

Alpha The ALPHA button provides access to the Alpha menu. The Alpha button is in

the group of five buttons immediately to the right of the LCD. The ALPHA button is the fourth from the top.

1. Press the ALPHA button to access the Alpha Menu.

2. To exit the menu, press ALPHA again.

Call The CALL button initiates a call sequence in the ALE option or in the

Transcall, Selcall, TransAdapt option. If these options are not installed or if they are turned off, this button is disabled.

For information on placing ALE calls, refer to Section 3.7 “Placing an ALE Call” on page 3-22. For information on placing Transcall, Selcall or TransAdapt calls, refer to Section 3.8 “Placing a TransAdapt, Transcall or Selcall” on page 3-23.

External RF Amplifier

The EXT AMP button transfers PTT control to an external amplifier connected to the TW7000 ACC 3 accessory connector.

1. To automatically set and lock RF power in the H (high power) position, set it to

ON.

2. To restore control, set it to OFF and the TW7000 no longer requires an external amplifier.

Priority Channel The PRI button sets the TW7000 to a channel defined as the priority channel.

The priority channel is preset to channel 001. To change the number of the priority channel, refer to Section 3.4 “Using Menus to Change Settings” on page 3-7.

RF Power Level The RF PWR button allows scrolling through the L (low), M (medium), and H

(high) power settings. Default settings for the three RF power levels are listed in the following table.

RF Power Level Factory Preset ALPHA 5 Setting

L (low) 10W (average power) 10 M (medium) 25W (average power) 30

3-4 TW7201I-MS

3: Operation

RF Power Level Factory Preset ALPHA 5 Setting

H (high) 100W (average power) 200

To change these values, refer to Section 3.4 “Using Menus to Change Settings” on page 3-7.

RX Attenuator The ATTN button reduces a strong receive signal by 20 dB by changing the

status of the input receiver attenuator from ON (+20 dB input RX pad) to OFF.

Scan The SCAN button initiates the function that searches the channels in the

selected scan group for a clear frequency.

1. Press the SCAN button to begin scanning the channels in the selected scan group.

2. Press SCAN a second time to terminate the scan sequence and revert the TW7000 to the last channel scanned.

For more information, refer to Section 3.6 “Scanning (for TA/TC only)” on page 3-20.

Scan Group A scan group is a collection of channels grouped together. After defining the

scan groups, use the SCAN GROUP button to select a scan group. For more information on scan groups, refer to Section 3.6 “Scanning (for T A/TC only)” on page 3-20.

Send The SEND button sends an ALE call to the last station with an established link.

Press the SEND button to send an ALE call. For a more detailed description, refer to Section 3.7 “Placing an ALE Call” on page 3-22.

Speaker The SPKR button switches the internal speaker on and off. To mute the

speaker, press the SPKR button (located beneath the SPKR icon on the lower right side of the display). The status of the speaker (ON or OFF) is displayed under this icon.

Squelch The SQ button changes the status of the squelch circuit from ON to OFF, or

vice versa. In the

ON setting, background noise is muted.

Tune The TUNE button activates the tune cycle when using automatic antenna

tuners like the RAT1000C with the TW7000.

Mode The MODE buttons, located beneath the mode icon on the lower left side of the

display , select an operational mode. Press the up or down arrow

MODE buttons

to scroll through the following choices.

Mode Description

USB Upper sideband voice: Standard voice grade IF filter and

voice AGC time constants.

LSB Lower sideband voice: Standard voice grade IF filter and

voice AGC time constants.

TW7201I-MS 3-5

3: Operation

Mode Description

USB/LSB DATA

USB/LSB AME

FSK AGC time constants, optional USB/LSB wideband data filter, 300-3300 Hz bandwidth.

Same as USB/LSB mode with addition of carrier in transmit mode at a level of -6 dB relative to PEP.

USB PCS Same as USB mode with addition of carrier in transmit

mode at a level of -16 dB relative to PEP.

USB/LSB

Optional narrowband filter with 500 Hz bandwidth.

Note: The LCD only displays these modes if a mode option is installed

(7000WB1 or 7000CW). The mode buttons are disabled if the Lockout or Frequency Blank functions are turned on. For information on these functions, refer to Section 3.4 “Using Menus to Change Settings” on page 3-7.

3.2.5

Internal Options The OPTION and STATUS buttons change the status of the following installed

options.

Option Displayed Icon

FED-1045 ALE ALE Transcall/Selcall TC/SC TransAdapt TA Noise Blanker NB Voice Enhancement OPT Encryption ENCR

When an option is installed in the TW7000, a corresponding icon is displayed on the outer edge of the LCD. The LCD displays the icon and the option’s current status (

ON or OFF).

To change the status of an installed option:

1. Press OPTION or STATUS. The icon of the last entered option flashes.

2. If you want a different option, press OPTION until the desired icon flashes.

3. Press STATUS to toggle between ON and OFF.

Note: If you press a button other than OPTION and STATUS, the icon

stops flashing and the radio performs the function of that button. The icon also stops flashing after a time-out of 10 seconds.

3-6 TW7201I-MS

3.3 VSWR Feature

VSWR is a measurement of how much power is delivered to the antenna system. A high VSWR reading indicates a significant impedance mismatch between the transceiver and the antenna system. A low VSWR reading indicates a good impedance match resulting in more power transferred to the antenna system.

When the microphone is keyed, the LCD displays the VSWR on the second text line (except when using ALE, TA/TC/SC and tune). If there is adequate power transfer from the radio to accurately measure VSWR and VSWR is less than 9:1, the LCD displays VSWR n-1, where n is the ratio n:1. If the ratio is 9:1 or higher, the LCD displays VSWR 9+. If the power out is too low for a reliable determination of VSWR, the LCD displays VSWR ----.

Modes USB/LSB DATA are not available for selection unless the 5 MHz IF board includes the 7000WB1 or 7000CW options.

Note: The VSWR feature requires that firmware 701AU (or later version) and

Reference/Control board 001-00206 are installed.

3: Operation

3.4 Using Menus to Change Settings

The TW7000 provides two menus for adjusting settings. The Alpha menu is for changing settings specific to the 7000TC option (Transcall, Selcall, and TransAdapt). The Alpha menu also provides access to the ALE submenu, which includes a set of functions for changing settings specific to the ALE option.

To access the Alpha menu:

1. Press ALPHA to display the first function on the menu.

2. Press the number of the desired function.

3. Press E to enter the selection.

4. After selecting and entering a function, use the arrow buttons on the keypad to scroll through any further selections within that function.

5. Press E to enter a selection.

For example, press ALPHA 17, then press E to access the ALE submenu.

TW7201I-MS 3-7

3: Operation

3.4.1 Alpha Menu

Table 3-1 Alpha Menu

ALPHA Function

Description

1 OPTION (not used) 2 SCAN SET CHANNEL (for non ALE) 3 SCAN RATE (for non ALE) 4 PRIORITY CHANNEL 5 RF POWER (TX) 6 FREQ BLANK (blanks LCD frequency and disables mode

changes) 7 LOCKOUT (disables frequency and mode changes 8 RECEIVE SET Rx ONLY (disables TX operation) 9 SET CLOCK (if option installed) 10 ALARM TIMER ON/OFF 11 SET ALARM 12 Time and date display 13 TA/TC/SC Rx ADDR (TransAdapt/Transcall/Selcall rec eive

address) 14 TRANSADAPT BER NUM (TA bit error rate) 15 SCAN GROUP NUMBER (for non ALE) 16 TA/TC/SC/ Tx ADDR (TransAdapt/Transcall/Selcall trans mit

address) 17 ALE Submenu (access to the ALE functions in Table 3-2 on

page 3-13.) 18 RECEIVE SET Rx/Tx (activated TX operation) 19 RF POWER ATU SET (tune power set) 20 BITE TEST INITIATED 21 OPTION 1 TYPE (Voice Enhancement Modulation) 22 COM 1 BAUD (comport configuration). 23 COM 2 BAUD (comport configuration). 24 BACKLITE OUT (ON/OFF). 25 FREQ INC HZ (frequency increment from 1 Hz to 10 MHz). 26 TEST REAR PANEL I/O (factory test). 27 ENC PASSWORD (Encryption menu). 28 PTT TIMER (sets maximum PTT time).

3-8 TW7201I-MS

Table 3-1 Alpha Menu (continued)

3: Operation

Alpha Menu Descriptions

ALPHA Function

Description

29 PRINTER. 30 CLONE RADIO. 31 GLOBAL POSITION SYSTEM (optional). 32 CW HOLD TIME. 33 SPLIT SITE (2 radios: TX and RX). 34 CLARIFIER ON/OFF. 35 100 CHANS

Note: These functions only apply if the 7000TC option is installed. The

exception is function Alpha 17 which allows access to the 7000ALE option.

(1) OPTION Not currently available. (2) SCAN SET CHANNEL

For customizing the selected scan group (selected with

ALPHA 15). For more information on how to use this

function, refer to Section “Customizing a Scan Group” on page 3-21.

(3) SCAN RATE For setting the rate at which channels within a selected

scan group are scanned. Enter a speed between 1 and 30 seconds per channel.

(4) PRIORITY CHANNEL

For changing the number of the priority channel. The default is channel 1. To change the priority channel:

1. Press ALPHA 4 and E. The existing priority channel

is displayed.

2. Enter the new priority channel number, then press E. The new priority channel number is displayed.

3. Press the PRI button to set the new priority channel.

(5) RF POWER For changing RF power output settings of the TW7000.

The defaults for the three power output levels are 10, 30, and 200. To change a value:

1. Connect a power meter to the antenna connector on the rear of the TW7000.

TW7201I-MS 3-9

3: Operation

2. Press RF PWR (refer to Figure 3-1 on page 3-2)) until the desired level (L, M, or H) is displayed.

3. Press ALPHA 5, then E. The LCD displays the current power level.

4. CW key the TW7000, then scroll to the power level indicated on the power meter. When the LCD displays the desired power level, press E.

5. Adjust the other two levels in the same manner.

6. Press E twice to exit this mode.

(6) FREQ BLANK For blanking the frequency on the LCD so that only the

channel number is displayed. Each time you press

ALPHA 6 the selection toggles between ON and OFF.

Note: Setting to ON disables the mode select buttons.

(7) LOCKOUT Prohibits changing any of the channel frequencies.

Every time you press ALPHA 7, the selection toggles between ON and OFF.

Note: Setting to ON disables the mode select buttons.

(8) RECEIVE SET Rx ONLY

For making the displayed channel a receive-only channel by locking out the PTT. The status is automatically set to ON whenever you press ALPHA 8. Press ALPHA 18 (TX) to reverse the receive-only state.

(9) SET CLOCK To set the internal clock (if installed) starting from the

year, down to the second. Enter the year, date, hour, minute and second pressing

(10) ALARM TIMER To automatically change the status of the timer from

OFF to ON whenever ALPHA 10 is pressed. In the ON

position, you can set the alarm using

(11) SET ALARM Sets a time for the sounding of the internal alarm. Turn

the alarm

ON using ALHPA 10. Enter the year, date,

hour, and minute pressing

(12) TIME AND DATE Automatically displays the setting of the internal clock. (13) TA/TS/SC Rx ADDR

E after each value.

ALPHA 11.

E after each value.

For selecting a self ID. The LCD briefly displays the current self ID. Use numbers from 000 to 255. This number is usually the last three digits of a serial number.

3-10 TW7201I-MS

(14) TRANSADAPT BER NUM

For setting the bit error rate (BER) to evaluate channel performance. The higher number corresponds to the better performing channel. The default is 70.

(15) SCAN GROUP NUMBER

For selecting a scan group. This is the scan group when using ALPHA 2 and ALPHA 3. The default is scan group

00.

Note: Also use the SCAN GROUP icon on the front

panel to select a 7000TC scan group (provided ALE is

OFF or not installed).

(16) TA/TC/SC Tx ADDR

For identifying the address for the station being called. Numbers from 000 to 255 are available. This number is usually the last three digits of a serial number.

3: Operation

(17) ALE Submenu For configuring the ALE system. For information about

the ALE submenu and how the system is configured, refer to Section “ALE Submenu Descriptions” on page 3-14.

(18) RECEIVE SET Rx/Tx

For automatically configuring the displayed channel to an RX and TX channel. Entering ALPHA 8 changes the setting back to an RX channel.

(19) RF POWER ATU SET

For entering an RF power to use during the tune cycle for an external automatic antenna tuner. The default is

12. Enter a level from 0 to 33.

(20) BITE TEST INITIATED

Automatically starts the TW7000 BITE system.

(21) OPTION 1 TYPE For activating the Voice Enhancement option if the

7000VEM is installed in the option card slot. For more information, refer to Section 3.11 “Activating Voice Enhancement” on page 3-26.

(22) COM 1 BAUD For configuring the TW7000 COM1 port for

communicating with a computer . Use the arrow buttons to scroll through and enter the baud rate, data bits, stop bits, and parity.

TW7201I-MS 3-11

3: Operation

(23) COM 2 BAUD For configuring the TW7000 COM2 port for

communicating with a computer . Use the arrow buttons to scroll through and enter the baud rate, data bits, stop bits, and parity.

(24) BACKLITE Automatically toggles the LCD backlight ON and OFF. (25) FREQ INC HZ For setting the amount frequency increases or decreases

when the arrow button is pressed to change frequency. The default is 100 Hz. Increments can be set from 1 Hz to 10 MHz.

(26) TEST REAR P ANEL I/O

For manufacturing use only.

(27) ENC PASSWORD To access the Encryption menu for configuration, if the

7000ENCR option is installed. For detailed information, refer to the 7000-series High-level Encryption Operator Manual (7000ENCR-MSOP).

(28) PTT TIMER For changing the internal PTT time-out. It can be set

from one second to one hour. Entering 0 sets it to OFF (no time-out). The default is 300 seconds.

(29) PRINTER For automatically printing complete channel

information for the TW7000, if connected to an external printer.

(30) CLONE RADIO For cloning another transceiver by downloading all

frequency and channel settings.

(31) GLOBAL POSITION SYSTEM

For configuring an external GPS device.

(32) CW HOLD TIME For setting the continuous wave hold time, in

milliseconds.

(33) SPLIT SITE For configuring two radios: receive only (master),

transmit only (slave). The receive radio controls the transmitter.

• Polling is set to 1 (OFF) or 2 (ON).

• Alarm timer sets the interval in minutes between system polling from the receiver to the transmitter.

• FP alarm activates the internal alarm when loss of communication occurs. Set to

3-12 TW7201I-MS

1 (OFF) or 2 (ON).

3.4.2 ALE Menu

3: Operation

• External alarm activates the external alarm when loss of communication occurs. Set to 1 (OFF) or 2 (ON).

(34) CLARIFIER For toggling the clarifier between ON and OFF

(primarily for the RT7000 which does not have an off/on clarifier switch on the front panel).

(35) 100 CHANS Supports the RAT1000 (1 kW tuner with 14 memory

channels) or the RAT1000C with 100 memory channels). Selecting this feature toggles it ON or OFF.

Table 3-2 ALE Submenu - ALPHA 17

ALE Function

Description

1 SCAN RATE 2 SCAN GRP (scan group) 3 TUNE GRP (tune group) 4 Rx SELCT (tune select) 5 SELF ADRS (self address) 6 SELF NAME 7 OTHR ADRS (other address) 8 OTHR NAME (other name) 9 MOD GRP (modify scan group) 10 SND SELCT (sound select) 11 SND ADRS (sound address) 12 SND LEN (sound length) 13 SND INT (sound interval) 14 CALL LIM (call limit) 15 SLF TMOUT (self time-out) 16 OTR TMOUT (other time-out) 17 AUTO FILL 18 LQA EXCNG (Link Quality Analysis exchange) 19 LQA DECAY (Link Quality Analysis decay) 20 BER THRSD (BER threshold) 21 GOLAY THD (Golay threshold) 22 ERR THRSD (error threshold)

TW7201I-MS 3-13

3: Operation

Table 3-2 ALE Submenu - ALPHA 17 (continued)

ALE Submenu Descriptions

ALE Function

Description

23 MESSG OUT (message out) 24 NEW MESSG (new message) 25 MESSG IN (message in) 26 HANDSHAKE 27 NET ADRS (network address) 28 NET NAME (network name) 29 NET SLOT (network slot) 30 NET OTHER (network other) 31 SET TO 32 GET LQA 33 EXIT MENU

To access ALE functions, enter ALPHA 17 from the Alpha menu. Navigate through the ALE menu in one of two ways:

• Press the desired function number, then press E or

• Use the arrow buttons to scroll through the menu to the function, then press E.

For information on placing an ALE call, refer to Section 3.7 “Placing an ALE Call” on page 3-22. For detailed ALE operating instructions, refer to the 7000ALE Radio Control Program Operator Manual (7000ALE-MSOP).

(1) SCAN RATE For selecting the rate at which scanning proceeds. The

arrow buttons toggle between 2 and 5 channels per second. The number to the left of the scan rate refers to option 1 (two seconds per channel) or option 2 (five seconds per channel).

(2) SCAN GRP For selecting an ALE scan group (from 0 to 9). This

becomes the specified scan group when using

GRP

and (9) MOD GRP.

(3) TUNE GRP For automatically tuning an ALE scan group (from 0 to

(3) TUNE

9). This tunes all the channels in the selected scan group.

(4) Rx SELCT For selecting a receive type:

• 1 for normal ALE receive/transmit (Rx/Tx)

• 2 for receive only (Rx ONLY)

3-14 TW7201I-MS

3: Operation

• 3 for channel setup (CH Rx/Tx) of the RC2 software.

(5) SELF ADRS For selecting an address number to review, change, or

add for this station (from 00 to 19).

1. To enter a new self address, enter the number.

2. To change an existing address, scroll to the number, then enter a new one.

(6) SELF NAME For entering a new self address name for the address

number selected in (5) SELF ADRS. Any existing address name is briefly displayed.

1. Use the alpha characters on the keypad to enter from 3 to 15 characters (no spaces or punctuation).

2. To delete a name enter three periods (...).

(7) OTHR ADRS For selecting an address number to review, change or

add for a station where messages are sent (from 00 to

99).

1. To enter a new other address, enter the number.

2. To change an existing address number, scroll to the number, then enter a new one.

(8) OTHR NAME For entering a new or different name for the other

address selected in (7) OTHR ADRS. Any existing other address is briefly displayed.

1. Use the alpha characters on the keypad to enter from 3 to 15 characters (no spaces or punctuation).

2. To delete a name enter three periods (...).

(9) MOD GRP For modifying or defining channels to include in a scan

group.

1. Scroll to the channel to set.

2. To include a channel in a scan group, enter 1 (ON).

3. To remove a channel from a group enter 2 (OFF).

(10) SND SELCT For enabling or disabling sounding. Enter 1 for

sounding

(11) SND ADRS For setting the sounding feature to the self address

selected in

OFF and 2 for sounding ON.

(5) SELF ADRS.

(12) SND LEN For setting the length of each sounding transmission.

The recommended sounding length is 5 or 10 seconds.

(13) SND INT For setting the time intervals for sounding. Enter from

1 minute to 24 hours (0001 to 1439 minutes).

TW7201I-MS 3-15

3: Operation

(14) CALL LIM For limiting the number of attempts made on each

channel when trying to establish an ALE link (00 to 99).

(15) SLF TMOUT For setting the length of time this (self) transceiver

remains linked after the transmission of all outgoing messages (000 to 600 in 15-second intervals).

(16) OTR TMOUT For setting the length of time the other radio remains

linked when there are no incoming responses (000 to 600 in 15-second intervals).

(17) AUTO FILL For enabling the transceiver to automatically add the

address of any station ALE hears to the list of approved other addresses. Enter 1 for OFF and 2 for ON, or use the arrows to toggle between OFF and ON.

(18) LQA EXCNG For requesting that a calling or called station exchange

a measurement of the link quality received on the other end. Enter 1 for OFF (no request) or 2 for ON (yes request), or use the arrows to toggle between OFF and

ON.

(19) LQA DECAY For entering the time period in which an LQA memory

cell linearly decays from a state of perfect (30) to a state of dead (0). Selectable in periods of 0, 1, 2, 4, or 8 hours.

(20) BER THRSD For entering the acceptable bit error rate threshold

(00 to 48) for received ALE words. A threshold of 00 allows for no errors; a threshold of 48 is the maximum amount of allowable errors. The default is 48 allowable errors.

(21) GOLAY THD For controlling the error correcting capability threshold

(0 to 4). A value of 0 allows for no corrections while a value of 4 is the maximum amount of corrections allowable. The default is three allowable errors.

(22) ERR THRSD For controlling the number of errors allowed before a

word is rejected (0 to 4). A value of 0 allows for no errors while a value of 4 is the maximum amount of errors allowable. The default is three allowable errors.

(23) MESSG OUT For assigning a number to an outgoing message (from 0

to 9). Enter a new assigned number or an existing number to review or change. T o enter a new or different message, use

(24) NEW MESSG.

3-16 TW7201I-MS

3: Operation

(24) NEW MESSG For creating a new outgoing message for the number

assigned in (23) MESSG OUT. Any existing message is briefly displayed. Use the alpha characters on the keypad to create a new message up to 90 characters.

(25) MESSG IN For selecting an incoming message for review (from 0

to 9). Messages are deleted when a tenth message is received.

(26) HANDSHAKE For setting the message exchange compatibility with

other radios. Enter 1 for NO Tx, or 2 for NO Rx.

(27) NET ADRS For assigning a number to a network address.

1. Enter a new number or an existing number to review or change.

2. To enter a new or different address name, use (28)

NET NAME

(28) NET NAME For entering a new network address for the number

assigned in (27) NET ADRS. The address you last entered is briefly displayed.

1. Use the alpha characters on the keypad to enter up to 15 characters.

2. To delete a name enter three periods (...).

(29) NET SLOT For assigning network timing slots to stations for

network call responses (01 to 16).

Note: You must set (27) NET ADRS and (28) NET NAME

first.

(30) NET OTHER For indicating whether a station is part of the network.

1. Scroll to find and display the ID number of the station.

2. Enter 1 for ON (part of the network) or 2 for OFF (not part of the network).

(31) SET TO For selecting a Other station (address) to determine its

LQA score for each of its channels (applies to radios with software version 701BD or later).

1. Use the up and down arrow buttons on the keypad to scroll through the Other Addresses until the desired other station is found. Or, enter the number using the keypad.

2. Press E to enter the selection (the Other ID and Other Address line goes blank).

TW7201I-MS 3-17

3: Operation

3. Select (32) GET LQA to view the LQA score for each channel for that address.

(32) GET LQA For viewing the LQA score of the channels for the

Other Address selected using (31) SET TO. The radio displays the LQA score for the first channel of the selected address. There are two score positions for each channel. The first score position is an analysis of the Other address by this radio with a range of 1 to 9. The second score position is an analysis of this radio with a possible range of 1 to 9. Scroll through the channels to view their scores.

(33) EXIT Exits the ALE Submenu.

3.5 Programming Channels and Frequencies

The TW7000 associates a frequency , mode, clarifier status, and offset value (if on) to each channel number. These can be different for each channel and can be viewed whenever that channel number is entered. Once frequencies are set to channels, you can assign channels to scan groups.

3.5.1 Selecting a

Channel and Scrolling

3.5.2 Entering a

Channel Frequency

Note: Scan groups are defined by channel number, not by frequency.

Changing the frequency of a channel also changes the frequency of that channel within each scan group.

1. Press C.

2. Enter the desired 3-digit channel number.

3. Press E. The channel number with its frequency and the clarifier offset is displayed.

4. Use the arrows on the keypad to scroll through the channel numbers.

Acceptable transceiver frequencies range from 0.100000 MHz to

30.000000 MHz in the receive mode and 1.6 MHz to 30.000000 MHz in the

transmit mode. Simplex operation uses identical RX and TX frequencies and must be in the transmit mode range.

Enter semi-duplex (split frequency) as an RX frequency first and then as a TX frequency. If you enter a frequency that is out of range, an error message is displayed and the previous frequency is restored.

When you enter a frequency , always include the decimal point unless there are all zeros after the decimal point. You do not need to enter leading or trailing zeros.

3-18 TW7201I-MS

3: Operation

Entering a frequency between 0.100000 MHz and 1.6 MHz in the simplex mode makes the radio receiver-only (PTT inhibited).

Entering a Simplex Frequency

Entering a Semi-duplex Frequency

To select a channel and assign a new frequency:

1. Press C, then enter the 3-digit channel number.

2. Press E.

3. Press F, then enter the frequency in MHz, including the decimal point.

4. Press E. The channel number updates with the new frequency.

Example: To change the frequency of channel 041 from

13.330,000 MHz to 8.572,000 MHz:

1. Press C, then press 041, then E. Display: CH FREQ

041 13.330,000 MHz Rx

2. Press F, then press 8.572, then E. Display: CH FREQ

041 8.572,000 MHz Rx

To select a channel and assign a new frequency:

1. Press C, then enter the 3-digit channel number.

2. Press E, then F. Display: xx. xxx, xxx

3. Enter the receive frequency.

4. Press F again. Display: xx. xxx, xxx

5. Enter the transmit frequency, then press E. The LCD displays the new channel frequency.

6. Press F to toggle between the receive and transmit frequencies.

Example: To enter an RX frequency of 21.2 MHz and a TX frequency of

29.3

MHz on channel 041:

1. Press C, then press 041, then E.

TW7201I-MS 3-19

3: Operation

Display: CH FREQ 041 xx.xxx,xxx (where xx.xxx,xxx is the

existing channel frequency)

2. Press F, then 21.2. Display: 041 21.200,000

3. Press F, then press 29.3, then E. Display: 041 29.300,000

Note: If you enter any numbers after pressing F, the existing frequency

changes.

Assigning RX Only Channels

Using the Manual Channel

To automatically limit a channel to a receive-only operation:

1. Enter ALPHA 8.

2. To convert the channel back to a standard RX/TX channel, enter

ALPHA 18.

To change a displayed frequency:

1. Press F.

2. Use the up arrow button to increase the frequency and the down arrow button to decrease the frequency.

3. Press E to store the new frequency in channel memory.

Note: The default frequency increment is 100 Hz for scrolling. To change

this increment, access ALPHA 25.

The manual channel allows you to create frequencies without worrying about overwriting a frequency on another channel. This channel is defined as channel 000. Frequency settings on the manual channel can be copied to a fixed channel.

To copy the channel 000 data to another channel:

1. Press C, then enter the 3-digit channel number to indicate where data is stored.

2. Press C, then E. This copies data from the manual channel to the new channel. Data is retained in the manual channel.

3.6 Scanning (for TA/TC only)

Scan groups are arranged in the TW7000 according to number. You can have up to 32 different scan groups in the radio at one time, each one having a different scan group number. Each scan group can have up to 64 channels.

3-20 TW7201I-MS

3.6.1 Creating or

Selecting a Scan Group

3: Operation

Because the TW7000 scans channels, not frequencies, you must assign a channel number to all desired frequencies in a scan group. Channel numbers are not exclusive to a particular scan group; the same channel can be used in different scan groups.

1. Do one of the following:

•If ALE is ON, press the SCAN GROUP button or select (2) SCAN GRP

from the ALE submenu.

•If ALE is OFF, press the SCAN GROUP button or ALPHA 15. Display: SCAN GRP xxx

2. Use the arrow buttons to scroll to a scan group number for identifying the group, or use the keypad to enter a scan group number.

3. Press E. The display briefly indicates the new scan group number. Display: SCAN GRP xxx (where xxx is the new scan group)

3.6.2 Customizing a

Scan Group

This becomes the specified scan group when using menu functions.

Customizing a scan group includes reviewing the contents of an existing scan group, adding and deleting channels from a scan group, and selecting the channels in that group to scan.

1. Press ALPHA 2.

2. Press E. Display: SCAN SET CHANNEL x NNN

(where x is the channel status and NNN is the 3-digit channel number)

Review channels in a scan group by pressing the arrow buttons to scroll through them. Channels are displayed in numerical order. Change scan group channels by deleting existing channels and adding new ones.

To delete existing channels from the group:

1. Use the arrow buttons to locate the channel to delete.

2. Using the alpha characters on the keypad, press D (delete).

3. Press E.

To add new channels to the group:

1. Use the up arrow to scroll past the highest numbered channel until xxx is displayed.

2. Enter the number of the channel to add, then press E.

TW7201I-MS 3-21

3: Operation

3. Continue adding channels as necessary.

4. Press E to exit this mode.

You can delete and enter a different single-digit channel at the same time by writing over the contents of an existing channel.

1. Scroll to the channel.

2. Press the single-digit number of the channel to add.

3. Press E.

3.6.3 Starting and

Stopping Scanning

1. Press SCAN to start scanning within the selected scan group. Scanning begins with the first channel in the scan group and continues in numerical order as each channel number is displayed.

2. Press SCAN again to stop the scanning process.

3.7 Placing an ALE Call

The ALE option automatically selects frequencies that support communication traffic between stations in a network. This section does not cover the ALE option in detail. For detailed instruction on ALE operations, refer to the 7000ALE Radio Control Program Operator Manual (7000ALE-MSOP).

To initiate an ALE call:

1. Press OPTION until the ALE icon flashes.

2. Press STATUS to turn the option ON.

3. Press CALL.

4. Scroll to find the desired calling option:

THIS IS: Creates a link, exchanges messages, and remains linked. THIS WAS: Creates a link, exchanges messages, then terminates the link. RE-LINK: Automatically chooses the best possible channel using the

information from a prior THIS IS call.

POLLING: Automatically completes a THIS WAS call on each of the scan

group channels. Link quality information is recorded for each channel.

5. Press CALL to make the selection.

6. Scroll to the type of call to make: INDIVIDUAL or NET.

7. Press CALL to make the selection. Display: To:xx nnnn (where xx is the destination address

number and nnnn is the address name)

8. Scroll to the destination address.

3-22 TW7201I-MS

3: Operation

9. Press CALL. Display: FR-xx (where xx is the self address number)

10. Scroll to display the self address.

11. Press CALL. Display: AMD message (Automatic Message Display)

12. Scroll to an existing message number, or select NO AMD MSG if you are not sending a message.

Note: To create a message, refer to the ALE submenu, function 24.

13. Press CALL to attempt the ALE call. Display: ALE LINK xxx (where xxx is the channel selected)

If you press CALL immediately after the message is sent, the call terminates and CALL TERM is displayed.

14. To initiate an ALE call to the last station with an established link, press

SEND.

15. Before attempting another call, terminate the previous link.

If the link quality on a THIS IS call is poor:

1. Press CALL immediately to end it.

2. Press CALL again and select RE-LINK.

3. Press CALL a third time and the TW7000 tries the link again using the second best channel.

4. Repeat this for subsequent channels until the link quality is acceptable.

3.8 Placing a TransAdapt, Transcall or Selcall

The TW7000 is capable of supporting the following selective call systems: TransAdapt (TA), Selcall (SC), and Transcall (TC). Selcall is the basic, single-channel calling system. Transcall is a more advanced system that determines the best channel in a scan group for communications. TransAdapt is a faster system that determines if the selected channel is acceptable for voice-quality communications, not necessarily the best.

3.8.1

Call Setup Before you initiate a call, turn on the appropriate option as follows:

1. Press OPTION until the correct icon flashes (either TCSC or TA).

2. Press STATUS to turn the option ON.

TW7201I-MS 3-23

3: Operation

Note: You can only select one call system at a time; You cannot turn the

TCSC option on until the TA option is off.

Before initiating TCSC operations, assign the TW7000 a call code (001 to

225). This is the call code that other stations use to contact this transceiver.

1. Press ALPHA 13.

2. Press E. Display: TA/TC/SC

Rx ADDR xxx

3. Enter the receive call code and press E. The number must be from 001 to 255 and not assigned to another transceiver.

Display: xxx (briefly shows the new receive code)

3.8.2

Selcall To start a Selcall, set the TW7000 to a fixed channel (not scanning).

1. Press OPTION until the TCSC icon flashes.

2. Press STATUS to turn the option ON.

3. Press C, then enter the channel from which to call.

4. Select the appropriate channel on the transceiver.

5. Press CALL to initiate the call.

6. Display: Tx ADDR xxx

7. Enter the Selcall code of the transceiver to call (001 to 255). A call to all channels (Allcall) is code 000.

8. Press CALL again. The TW7000 begins the call sequence. If the call is successful, a link alarm sounds.

Display: SC LINK If the call is unsuccessful, calling discontinues and NO LINK is briefly

displayed.

3.8.3

Transcall To start a Transcall, place the TW7000 in scan mode:

1. Press OPTION until the TCSC icon flashes.

2. Press STATUS to turn the option ON.

3. Press SCAN.

4. Press CALL to initiate the call.

5. Enter the Transcall code of the transceiver to call (001 to 255). A call to all channels (Allcall) is code 000.

3-24 TW7201I-MS

3: Operation

6. Press CALL again. The TW7000 is now under full control of the Transcall circuit.

The TW7000 starts transmission on each of the ten channels until it is synchronized with the station to call. When synchronized, both transceivers step through each channel by making a short transmission until the best available channel is reached. Once the best channel is reached, the TW7000 sounds an alarm indicating a successful Transcall connection.

Display: TC LINK If the call is unsuccessful, calling discontinues and NO LINK is briefly

displayed.

7. To break the connection, press SCAN.

8. To stop the call before connecting, press CALL.

Note: When scanning in T r anscall, the receiving station also responds to

a valid Selcall.

3.8.4

Tran sAd apt The TW7000 can be on a fixed channel or in scan mode. If it is set on a fixed

channel, TransAdapt operates the same as Selcall. If used in scan mode, TransAdapt locates the first usable frequency, which may not be the best.

1. Press OPTION until the TA icon flashes.

2. Press STATUS to turn the option ON.

3. Press SCAN.

4. Press CALL to initiate the call.

5. Enter the code of the transceiver to call (001 to 255). A call to all channels (Allcall) is code 000.

6. Press CALL again. The TW7000 is now under full control of the TransAdapt circuit.

The TW7000 starts transmission on each of the ten channels until it is synchronized with the station called.

Display: TA LINK If the call is unsuccessful, calling discontinues and NO LINK is briefly

displayed.

7. To break the connection, press SCAN.

8. To stop the call before connecting, press CALL.

TW7201I-MS 3-25

3: Operation

3.9 Activating the Noise Blanker

The Noise Blanker option (7000NB) eliminates impulse-type interference in high-noise environments.

1. Press OPTION until the NB icon flashes.

2. Press STATUS to turn the option ON.

3.10 Activating Encryption

The Encryption option (7000ENCR) provides high-level security.

1. Press OPTION until the ENCR icon flashes.

2. Press STATUS to toggle between 1 and OFF. The 1 position turns the Encryption option on.

For detailed information on this security option, refer to the 7000-Series High-Level Encryption Operator Manual (7000ENCR-MSOP).

3.11 Activating Voice Enhancement

The DSP-based Voice Enhancement option (7000VEM) suppresses various types of noise and interference on voice communications.

The 7000VEM has two modes of operation. Mode 1 is for adaptive peaking and reduces atmospheric noise and static normal with HF signals. Mode 2 adds the ability to remove man-made interferences like ignition and power line noises.

1. Press OPTION until the OPT icon flashes.

2. Press STATUS to turn the option ON.

3. Press ALPHA 21, then press E. Display: OPTION 1

TYPE x (briefly displays last mode entered)

4. Enter the mode (1 or 2) for this transceiver, then press E.

Note: To verify that the 7000VEM option is installed, look for

OPT 1 MODULE to display during start-up.

3-26 TW7201I-MS

CHAPTER 4

THEORY OF OPERATION

The TW7201I is a remote control unit that uses a high speed digital modem to transmit and receive voice and data. The modem communicates using two data channels and one voice channel. The modem sends a packet of 10 bits over a 2-wire line. The packets from each side of the modem network are synchronized so they do not collide. This system is limited by line length between the transmit and receive packets. The DHSL system includes DHSL Modem board that consists of a master modem in the TW7000 transceiver and slave modem in the TW7201I remote control head connected by a DHSL interface cable (C992307).

4.1 TW7201I Assemblies

The TW7201I consists of six board assemblies:

ABB100A(B) ANTENNA

• Front Panel Processor board

• Display board

• Switch board

• Keypad

• DHSL Modem board

• Power supply/Interface board

13.8VDC DC INPUT

ANTENNA

TW7201I REMOTE

CONTROL

HEAD

TW000 TRANSCEIVER WITH 7000RI OPTION

FUSE

REMOTE

GND

C992307 DHSL INTERFACE CABL

CCESSORY 1

CCESSORY 2

REMOTE

CCESSORY 1

CCESSORY 2

CCESSORY 3

GND

FUSE

13.8VDC DC INPUT

C INPUT

Fuse

Pull

Figure 4-1 TW7201I Remote System

TW7201I-MS 4-1

4: Theory of Operation

4.2 Front panel Assembly

The front panel assembly includes the die-cast front panel and four PC boards (refer to the Figure 4-2 below) and is connected to the DHSL Modem board by a ribbon cable through connector J1.

PWR

OFF

VOL.

CNTL.

MIC.

INPUT

J10

MIC.

INPUT

CLAR.

DHSL

MODEM

BOARD

3 2 1

+ 12V UNREG

3, 4

24 25

26 27 30

SQA

1 2 3 4 5

PWR ON EXT. SPKR

HANDSET AUDIO

MIC. AUDIO

HANDSET AUDIO

VOGAD

U17

8-BIT DATA BUS

FPTCALM PRMICA

U14

SPKR

BUTTON

K1B

AUDIO

AMP

RX AUDIO

FRONT

PANEL

PROCESSOR

BOARD

SWITCH

Q7/Q8

AUDIO

PROCESSOR

CIRCUITRY

U13

+ 12V

TC/TA/SC

VOLTAGE

REG.

U15

MULTIPLEX

U11

ALARM

8-bit DATA BUS

+ 5V

BACKLITE

DRIVER

DS1

MULTIPLEX

LATCH

U12

DISPLAY

BOARD

DISPLAY

DRIVER

CUSTOM

LCD

DISPLAY

DRIVER

LCD

SERIAL

DRIVER

SWITCH BOARD

SWITCH MATRIX

CRCCC RRR

J11

KEYPAD

BOARD

CCCC

R R R R

INTERNAL

PEAKER

Figure 4-2 Front Panel Assembly Block Diagram

4-2 TW7201I-MS

4.2.1 Front Panel

Processor Board

4: Theory of Operation

The main function of the Front Panel Processor board is to process commands and interact with the transceiver through the DHSL modem. It also provides transmit and receive paths for front panel audio processing.

Front Panel Connections

The Front Panel Processor board connects directly to the microphone connectors (J9, J10),

CLAR control (J8), PWR OFF/VOL switch (J7), LCD

board (J3 and J4), Switch Matrix board and Keypad (J6) and DHSL Modem board (J1).

Transmit Audio The Front Panel Processor board receives transmit audio from the front panel

microphone through connectors J9 or J10 pin 4. The transmit audio goes to the voice operated gain adjusting device (VOGAD) U17 which also provides speech compression. The transmit audio continues through switch Q7 and is output to the DHSL Modem board through J1 pin 25 (PRMICA).

Receive Audio The Front Panel Processor board inputs receive audio from the DHSL Modem

board as squelch audio (SQA) through J1 pin 30. It then goes to the top of volume control (J7 pin 3) and returns through the volume wiper (J7 pin 4). The receive audio goes to the audio amplifier U14 that amplifies the audio signal and outputs it to the speaker through J5. Switching relay K1 connects the receive audio to the speaker. The receive audio is also routed to microphone jacks J9 and J10 pin 2.

External Speaker and Alarm

External speaker audio is routed to J1 pin 27. The external speaker output goes through the DHSL Modem board and Power Supply/Interface board, then out the ACC 2 accessory connector on the rear panel. A separate call alarm buzzer (DS1) alerts the operator of incoming calls and links transcall (TC)/transadapt (TA) operation.

Wake-up Circuitry

Voltage Monitor, Clock and Data Busses

The Front Panel Processor board uses the parity tree device U5 to monitor input lines from the front panel (PTT, CW, clarifier and keypad) to the processor. When one of these input lines changes state (asserted), the output of U5 is asserted to trigger the one-shot multivibrator U4 which sends a 20 ms pulse to the processor interrupt line (pin 2) through Q1.

Voltage detector U16 monitors and conditions the on/off power line to the processor. At power up, U16 holds the processor in reset until the supply voltage reaches a percentage of the set voltage (5

Vdc). If the supply voltage drifts above or below the set voltage, U16 places the processor in reset until the VDD is within a percentage of the set voltage.

The crystal oscillator Y1 (2.3576 MHz) provides the internal clock for the processor at pins 42 (OSC1) and 43 (OSC2). The processor includes three 8-bit I/O data bus interfaces PA, PB and PC. The PB bus provides data to the Display board updating the display as required. The PB bus to the DHSL Modem board is not used. The PA bus provides specific signals to the DHSL Modem board while the PC bus provides specific signals to the Display board.

TW7201I-MS 4-3

4: Theory of Operation

Front Panel Keypad

Configuration Jumper Block

Pressing a key on the front panel Keypad asserts a row line that connects to multiplexer U11 and a column line connected to muliplexer U12. These muliplexers send a pulse to U12 pin 3 that stops the keypad oscillator U19C. The oscillator drives counter U9 which scans the row and column lines. When the keypad scanning stops, shift register U10 records the count at the point it stops; this corresponds to a unique key. After reading the key, the processor restarts the scanning loop by toggling U3 pin 7.

Jumper block J11 provides configuration settings for front panel functions. Multiplexer U2 converts the parallel settings to serial data that the processor reads at power up. Table 4-1 below lists the functions controlled by the J11 jumper block.

Table 4-1 Jumper Block J11 Default Settings

Jumper Function Default

1 All function lockout Off 2 Frequency change lockout Off 3 Frequency display lockout Off 4 Mode change lockout Off 5 Power change lockout Off 6 PTT lockout Off 7 CW lockout Off 8 TW7000 lockout Off 9 Not assigned Off 10 Not assigned Off

4.2.2

Switch Board The Switch Matrix board attaches to the front panel and provides an interface

for the keypad alphanumeric keys.

4.2.3

Keypad The Keypad attaches to the front panel and provides a way for the operator to

interface with the TW7000 transceiver through the TW7201I using alphanumeric keys.

4.2.4

Display Board The Display board attaches to the front panel and includes the LCD and

display drivers for the LCD. It also includes a serial to parallel driver that takes serial transmit data in U3 and provides parallel data for the display bar graph and other indicators.

The LCD is a high resolution back-lit alphanumeric display that provides channel number, channel frequency, time, clarifier offset, mode and relative signal strength/output power, as well as the status of available options. Two

4-4 TW7201I-MS

alphanumeric lines are also available for alphabetic characters (English) for BITE status, and submenus for composing and receiving ALE orderwire or data messages.

4.3 Rear Panel Assembly

4.3.1 Power Supply/

Interface

The TW7201I can be powered from an AC or DC power source. The AC input can be configured for 120 VAC or 240 VAC. The DC input is typically

13.8 Vdc. Refer to Figure 4-3 on page 4-6 for the TW7201I AC power distribution.

4: Theory of Operation

AC/DC Power Input

The power supply/interface module is mounted to the rear panel. The voltage input module/filter mounted on the rear panel provides connection to the AC power source. A voltage selector card configures the AC input for either 120 VAC or 240 VAC. The selector card places the transformer T1 primary windings in series for the 120 VAC position and in parallel for the 240 VAC position. The output of T1 is stepped-down and goes to the full-wave rectifier BR1. The rectifier bridge produces a DC output (typically 20 Vdc unloaded at TP1). Diode D2 provides overvoltage protection and D3 provides isolation for the DC input. A low voltage drop-out regulator consisting of transistors Q1, Q2, Q3 and U1 provides 12 Vdc at TP2. If the regulators fail, zener diode D4 provides overvoltage protection. Either the front panel PWR OFF/VOL switch or the rear panel power line can activate the power switch relay K1 to provide +12 Vdc to the other boards.

Audio Interface Voltage regulator U3 provides 8 Vdc to operational amplifier U2B which

supplies power (+4 Vdc) to op amp U2A, U2C and U2D. U2A functions as an accessory audio transmit input buffer. The nominal

balanced input from each accessory connector is 0 dBm at 600 ohms (2 Vpp). The ACC 1 connector audio transmit level can be adjusted using trimmer resistor R27. The

ACC 2 connector audio transmit level can be adjusted using

trimmer resistor R29. Buffer amplifier U2C provides a nominal 0 dBm at 600 ohms balanced

receive output at accessory connector ACC 1 which can be adjusted using R19.

Remote Line Interface

Buffer amplifier U2D provides a nominal 0 receive output at accessory connector

The Power Supply/Interface board provides an interface between the rear panel and the DHSL Modem board. The remote lines DHSL1 and DHSL2 run

dBm at 600 ohms balanced

ACC 2 which can be adjusted using R22.

through the Power Supply/Interface board to the DHSL Modem board at J10. The main interface to the modem board is connector J5. Connector J2 provides the power to the modem board.

TW7201I-MS 4-5

4: Theory of Operation

J5 - 16

J5 - 14

U2B

U2C

U2D

U2A

J6 - 11, 13

J7 - 11, 13

J6 - 15, 17

J7 - 15, 17

4.3.2 DHSL Modem

Board

J2 - 2

J2 - 3

Figure 4-3 Power Supply/Interface Block Diagram

The DHSL Modem board includes the following components:

• DHSL modem IC

• 2-wire interface

• Codec IC

• Analog interface circuits

4-6 TW7201I-MS

4: Theory of Operation

The DHSL modem transmits data in a 10-bit burst over a 2-wire line. Of the 10 bits, eight bits are digitized voice and two bits are data. The modem link is synchronous. The two data bits are separated and stacked by two data set interfaces (DSI) to give two digital channels. One digital channel provides transceiver control; the other channel is a spare.

Power and Ground

Power and ground are routed from the Power Supply/Interface board to the DHSL Modem board through the J2 connector. Connector J3 provides the remote line interface and the front panel interface is through J1. Connector J11 is used for the accessory connector interface. Voltage regulators U14 (5 Vdc), U17 (8 Vdc) and U12 (9 Vdc) provide regulated power to the various circuits.

Modem Clock Crystal oscillator Y1 (4.096 MHz) and associated logic (U10F, U10E, U10D,

U8 and U9) generate the modem clock that provides timing to the modem IC U7, CODEC IC U11 and the two DSI chips U3 and U4.

RS-232 Interface The TW7201I can communicate with a DTE using RS-232 receiver/driver U5.

U5 provides an RS-232 interface to both accessory connectors. The baud rate for the RS-232 interface is configured by the 8-position DIP switch S1 to 9600 through the data set interface (DSI) U3. DSI U4 provides a 9600 baud spare data channel between the TW7201I front panel and the transceiver. Alternatively, the spare channel can be used as a switch using Q6 as the output. The input is set by the 3-pin header JU9 set to the BC position.

Codec The codec U11 is a voice digitization and reconstruction device. In transmit

mode, the TW7201I uses the codec to digitize audio signals from the front panel microphone or an external transmit audio source connected to either of the rear panel accessory connectors. U11 then sends this audio to the DHSL modem U7 to transmit to the transceiver. In receive mode, the codec receives digital information from the modem and returns it to audio signals that are output to the front panel speaker through the Front Panel Processor board or to an external speaker connected to either of the accessory connectors.

DHSL Modem The DHSL modem U7 interfaces with the transceiver across a 2-wire remote

line coupled through transformer T1. U7 receives from and returns digitized audio to the codec U11. The modem receives digitized audio from the codec and digital control signals from the front panel, then transmits them to the transceiver and vice versa. It can also receive data from a DTE through DSIs U3 and U4.

Receive Path The DHSL Modem board receives digitized audio from the transceiver

through the 2-wire remote line, then sends it to the codec to be decoded to analog audio. The receive audio output from the codec is coupled via C30 to the audio amplifier U13D, then output to the front panel speaker (SQA) via output amplifier U15C. The receive audio can be routed to an external speaker via the 600 ohm accessory connectors (600RXA) driven by amplifier U13C. Refer to Figure 4-4 on page 4-9.

TW7201I-MS 4-7

4: Theory of Operation

Transmit Path U13A is the transmit audio amplifier with inputs from the front panel

(PRIMCA) and accessory connectors (600TXA). The 600 ohm accessory transmit audio can only be enabled using a rear panel key (EXAUDPTT) which enables switching FET Q3. The codec U11 receives the transmit audio, converts it to a digital information, then sends it to DHSL modem U7. The modem transmits the digitized transmit audio along with control data to the transceiver through the 2-wire remote line. Refer to Figure 4-4 on page 4-9.

CW Oscillator The CW 1 kHz oscillator circuit is optimized for a short rise time. Amplifier

U15A and U15B make up a side tone oscillator that is output at U15D pin 14 and summed in with the squelch audio at U15C.

4-8 TW7201I-MS

DATA IN J1 - 32

4: Theory of Operation

BALANCED

LINE

J3 - 5

DATA OUT J1 - 31

PRMICA (250 mVpp typ.) J1 - 25

600TXA (2 Vpp typ.) J11 -20

CW KEY J1 - 13

TX AMPLIFIER U13A

+ 12 VOLTS IN

J2 - 2

RX AMPLIFIER U13D

RX AMPLIFIER U13C

RX AMPLIFIER U15C

600RXA

J11 - 21

SQA

J1 - 30

J3 - 6

Figure 4-4 DHSL Modem Board Block Diagram (Remote Head)

TW7201I-MS 4-9

4: Theory of Operation

4.4 7000RI Option

The 7000RI option is the remote control DHSL Modem board in the transceiver. The 7000RI DHSL Modem board must be installed in a TW7000 or TW7000F transceiver to communicate with the TW7201I remote head.

The 7000RI consists of an DHSL Modem board installed in the transceiver’s FSK/DHSL slot. It also includes a serial dual UART chip and two jumpers that configure the transceiver’s processor. On the transceiver Processor board, jumpers must be installed on jumper/headers JU11B and JU12A.

The DHSL Modem board interfaces with the Front Panel Processor board through connectors J11 and J12 (J1 is not used in the transceiver DHSL Modem board).

4.4.1 Power and

Ground

Power and ground are routed to the modem board through the J11 connector. Connector J12 provides the remote line interface through the DC regulation and interface board; it also connects to the Processor board. Connector J1 is not used on the 7000RI DHSL Modem board. Connector J11 connects to the Audio board, and the DC regulation and interface board. Voltage regulators U14 (5 Vdc), U17 (8 Vdc) and U12 (9 Vdc) provide regulated power to the various circuits.

4.4.2

BITE Circuitry The BITE circuit consists of transistors Q4 and Q5. The 5V supply keeps Q5

biased on whenever the DHSL Modem board has power . If the DHSL Modem board loses power, Q5 turns off and Q4 turns on (active low) to indicate a BITE failure to the processor. Converter U1 output QB is set low to disable the BITE for certain tests.

4.4.3

Modem Clock Crystal oscillator Y1 (4.096 MHz) and associated logic (U10F, U10E, U10D,

U8 and U9) generate the modem clock that provides timing to the modem IC U6, codec IC U11 and the two data set interfaces U3 and U4.

4.4.4 RS-232

Interface

4.4.5

Codec The codec U11 is a voice digitization and reconstruction device. In transmit

The RS-232 interface is available for the remote control head DHSL Modem board but not the 7000RI DHSL Modem board.

mode, the 7000RI uses the codec to digitize an audio signal from the front panel microphone or an external microphone connected to one of the rear panel accessory connectors. The codec sends the transmit audio to the DHSL modem U6 to transmit to the TW7201I through a 2-wire remote cable.

4-10 TW7201I-MS

4: Theory of Operation

In receive mode, the DHSL Modem board receives digital information from the TW7201I, then sends the digitized audio on the voice channel to the codec to be reconstructed to analog audio. The codec outputs the audio to front panel speaker through the Audio board or to an external speaker connected to either of the rear panel accessory connectors.

4.4.6

DHSL Modem The DHSL modem IC U6 interfaces with the TW7201I across a 2-wire remote

line coupled through transformer T1. It also sends and receives digitized audio from the codec U11. The modem receives digitized audio from the codec and digital controls signals from the processor, then transmits them to the TW7201I and vice versa.

4.4.7

Transmit Path The 7000RI DHSL Modem board receives transmit audio from the Audio

board on the ECRXA line through audio amplifier U13A and outputs it to the codec. The codec digitizes the audio and sends it to the DHSL modem. Along with control signals from the Processor board, the modem sends the digital information to the TW7201I over the 2-wire remote line.

4.4.8

Receive Path The 7000RI DHSL Modem board receives digital information through the

DHSL Modem board from the TW7201I. The control signals go to the Processor board. The transmit audio from the TW7201I are routed to the codec for reconstruction to analog audio. The codec outputs the audio to the Audio board on the ECTXA line through the audio amplifier U13D.

TW7201I-MS 4-11

4: Theory of Operation

DATA IN J1 - 32

BALANCED

LINE

J12 - 19

DATA OUT J1 - 31

ECRXA J11 - 22

J11 - 13

J11 - 16

J11 - 4

SERIAL

PARALLEL

INTERFACE

TX AMPLIFIER U13A

+ 12 VOLTS IN

J2 - 2

RX AMPLIFIER U13D

RX AMPLIFIER U13C

ECTXA

J11 -10

BITE

J11 - 17

J12 - 17

Figure 4-5 DHSL Modem Board Block Diagram (Transceiver)

4-12 TW7201I-MS

CHAPTER 5

TESTING AND TROUBLESHOOTING

The following sections provide procedures for testing and troubleshooting the TW7201I system. The test procedures provide a quick and accurate method of evaluating the essential TW7201I operating characteristics to verify operational integrity. If a fault is detected, the troubleshooting procedures aid in determining the necessary intermediate action.

The TW7201I consists of a final assembly (002-03000) and an accessory kit (002-03001). Table 5-1 provides the main functional subassemblies and their respective circuit boards and cable assemblies.

Table 5-1 TW7201I Subassemblies

Subassemblies Description 001-03000

001-00110 Switch board 001-00120 LCD assembly 001-00130 Keypad 001-00141 Ribbon cable assembly 001-00142 Front panel software 001-03001 Front Panel Processor board 001-00150 Volume cable assembly 001-00161 Clarifier cable assembly 001-00170 Speaker assembly 001-00180 Microphone connector J9 assembly 001-00185 Microphone connector J10 assembly

002-03200 Rear Panel Assembly

001-00220 Ribbon cable assembly 25D 001-00230 Ribbon cable assembly 9D 001-00240 DC cable assembly 001-03210 AC cable assembly

Front Panel Assembly

TW7201I-MS 5-1

5: Testing and Troubleshooting

Table 5-1 TW7201I Subassemblies

Subassemblies Description

002-03005 Power Supply Board 002-03100 DHSL Modem Board

5.1 Test Procedures

This section includes test procedures for verifying the operation of various TW7201I functions.

5.1.1

Test Equipment The test procedures in this section require the following equipment:

• Attenuator

• Wattmeter

• Signal generator

• Frequency counter

• SINADDER

• Oscilloscope

• Power supply

• Multimeter

PF voltmeter

• Microphone

• CW key

5.1.2

Disassembly To troubleshoot the TW7201I, it is necessary to disassemble the TW7201I,

disconnect cable assemblies and remove circuit boards. To disassemble the TW7201I:

1. Remove the screws from the top and bottom cover.

2. Remove the two large screws from each side panel.

3. To remove the DHSL Modem board, disconnect connectors J1, J2, J3, J4

and J11, then remove the screws securing the DHSL Modem board to the front panel assembly.

4. To remove the Power Supply/Interface board, disconnect connectors J1

through J10, then remove the six screws securing the Power Supply/Interface board to the rear panel.

5-2 TW7201I-MS

5: Testing and Troubleshooting

5.1.3

Operational Test The operational test checks the overall operational integrity of the TW7201I

and should be performed during initial inspection, after the TW7201I has been repaired or any time there is a suspected degradation of performance.

To perform the operational test:

1. Turn the TW7000 transceiver on.

The TW7000 includes an internal BITE circuit that activates automatically at powerup. If a fault is detected, the front panel LCD indicates the fault. If the internal 7000RI option is present, the front panel LCD displays INSTALLED ISDN REMOTE during the BITE sequence.

2. Turn the transceiver PWR OFF/VOL switch on and adjust the knob until

audible noise can be heard in the speaker.

Check the LCD to make sure the internal speaker is enabled. If it is not, press the SPKR button below the icon to enable the speaker.

3. Select a known frequency (WWV for example) and monitor the receive

audio.

4. Change to a channel with a clear frequency. Push the PTT button on the

microphone and speak into the microphone. Receive audio should stop and the transceiver should transmit at the channel frequency.

5. Connect the TW7201I to the TW7000 transceiver using the remote cable

(C992307).

6. Turn the TW7201I on. The transceiver should begin to update the remote

head information (it takes about two seconds for the front panel to update).

7. Make sure the speaker is turned on at the TW7201I. Monitor the receiver

audio.

8. Install a microphone to the TW7201I. Change to a channel with a clear

frequency and push PTT on the microphone. The receive noise should stop and the transceiver should transmit at the channel frequency.

5.2 Troubleshooting

This section provides information for troubleshooting the TW7201I down to the subassembly level. The objective is to identify a faulty board in the remote head.

After replacing a faulty board, verify the fault no longer exists and perform the operational test described in the previous section.

TW7201I-MS 5-3

5: Testing and Troubleshooting

CAUTION: Use extreme caution when powering the TW7201I from an AC power source. Using AC power produces high voltage on the power supply board. Use a DC power source when performing testing and servicing.

5.2.1 Transceiver

7000RI

1. Power on the TW7000 transceiver.

2. Verify the transceiver detects and indicates the presence of the 7000RI

option on the front panel LCD.

3. Verify the correct remote cable wiring (where applicable).

5.2.2

Power If the TW7201I does not power up:

1. Verify the TW7201I is receiving the correct input power (13.8 Vdc or

110/220 VAC).

2. For AC input, verify the AC voltage selector card is set for the correct AC

input.

3. Check the fuses in the DC input/fuse block on the rear panel.

Note: If the fuse is blown, determine the reason and perform the

necessary repairs before continuing with further testing.

4. Verify the DC input voltage on the Power Supply/Interface board at test

points TP1 and TP2 is 12 Vdc.

5. Check the PWR OFF/VOL switch. Ground the PWRON line to verify

proper switch operation. The relay on the Power Supply/Interface board should activate.

6. Measure the following voltages on the Power Supply/Interface board: TP1

input voltage (source voltage), TP2 12 Vdc.

7. Check PWR OFF/VOL knob operation and backlight operation (ALPHA 24).

5.2.3

Receive Audio If there is no receive audio or noise at the TW7201I:

1. Verify the receiver signal/noise is present at the transceiver. Check for

correct DHSL Modem board configuration according to the system configuration.

Note: The audio is transmitted as digital data. If data information (for

example, front panel) is okay but there is no receive audio, check JU5, JU6, JU7 and JU8.

5-4 TW7201I-MS

5.2.4 Communication

Between TW7201I and TW7000

5: Testing and Troubleshooting

2. Check the audio signal received at the codec IC J11 on the DHSL Modem

board. The codec chip converts the audio to and from digital information (Rx on J11 pin 2 and Tx on J11 pin 5).

3. Check the audio signal transmitted from the DHSL Modem board at U15C

pin 8. This signal goes to the front panel speaker through the Front Panel Processor board.

4. Check the audio signal at the volume potentiometer and on the wiper (J7

pin 1 and 2).

5. Check for the audio signal at the audio amplifier output on the Front Panel

Processor board (U14 pin 4).

6. Check for the audio at the speaker on the Front Panel Processor board (J5

pin 2).

If there is no communication between the TW7201I and the TW7000 transceiver:

1. Verify the backlight and PWR OFF/VOL switch are operational. This

indicates the Front Panel Processor board is functional.

2. Cycle power to the transceiver and TW7201I. Verify the TW7201I is

receiving audio from the transceiver . If the remote head is receiving audio, this indicates the DHSL modems are communicating.

3. Check the transceiver DHSL Modem board, configuration and cable.

TW7201I-MS 5-5

5: Testing and Troubleshooting

5.3 Component Locations, Pin Assignments, Schematics and Part Lists

The following section provides component locations, schematics and parts lists for the Front Panel Processor board, DHSL Modem board and the Power Supply/Interface board.

5.3.1

Front Panel Processor Board

Pin Signal Description

1 GND Chassis ground 2 GND Chassis ground 3 +12V Unregulated +12 Vdc input 4 +12V Unregulated +12 Vdc input 5 PB7 Data line for display drivers

Table 5-2 Front Panel Processor J1 Pin Assignments

6 PB6 Data line for display drivers 7 PB5 Data line for display drivers 8 PB4 Data line for display drivers 9 PB3 Data line for display drivers 10 PB2 Data line for display drivers 11 PB1 Data line for display drivers 12 PB0 Data line for display drivers 13 FPCWKEY CW key output to modem board (turns on

the CW oscillator) 14 FPCWA Not used 15 FPWSPI Not used (spare) 16 FPPTT Output to modem board that indicates a

front panel PTT 17 FPSPITXD Serial peripheral interface transmit data 18 FPSPIRXD Serial peripheral interface receive data 19 FPSPICLK Serial peripheral interface clock 20 FPBITE\ BITE input from DHSL Modem board

(active low) 21 ENA Enable line for serial data input to modem

board 22 FPWSP2 Spare port

5-6 TW7201I-MS

5: Testing and Troubleshooting

Table 5-2 Front Panel Processor J1 Pin Assignments

Pin Signal Description

23 DHSLMSEL DHSL modem select (high selects the

DHSL Modem board) 24 FPTCALM Transcall alarm tone 25 PRMICA Microphone audio output 26 PWR ON\ Power status (active low) 27 EXTSPKR External speaker audio 28 FPSP3 Not used 29 MODEM EN Modem enable line from Front Panel

Processor board 30 SQA Audio input from modem board 31 FPRXD Receive data from modem board 32 FPTXD Transmit data to modem board 33 FPSP1 Not used 34 EXAUDPTT\ External audio PTT input from modem

board (active low)

Table 5-3 Front Panel Processor J3 Pin Assignments

Pin Signal Description

1 PB0 Data line for display drivers 2 PB1 Data line for display drivers 3 PB2 Data line for display drivers 4 PB3 Data line for display drivers 5 PB4 Data line for display drivers 6 PB5 Data line for display drivers 7 PB6 Data line for display drivers 8 PB7 Data line for display drivers 9 +5V Regulated +5 Vdc output 10 GND Chassis ground 11 BKLIT1 Backlight driver 12 BKLIT2 Backlight driver

TW7201I-MS 5-7

5: Testing and Troubleshooting

Table 5-4 Front Panel Processor J4 Pin Assignments

Pin Signal Description

1 SYNC LCD sync pulse 2 WE\ Write enable (active low) 3 RE\ Read enable (active low) 4 READY Not used 5 +12V Heater 6 CS2 Chip select 2 7 CS1 Chip select 1 8 SPITXD Serial peripheral interface transmit 9 CLKDIS Not used 10 HEATER SW Heater switch 11 SENSE 1 Not used 12 CONTRAST Contrast adjust

Table 5-5 Front Panel Processor J5 Pin Assignments

Pin Signal Description

1 SPKR AUD Speaker audio 2 GND Chassis ground

Table 5-6 Front Panel Processor J6 Pin Assignments

Pin Signal Description

1 C0 Column matrix data 2 C1 Column matrix data 3 C2 Column matrix data 4 C3 Column matrix data 5 C4 Column matrix data 6 C5 Column matrix data 7 C6 Column matrix data 8 C7 Column matrix data 9 R0 Row matrix data 10 R1 Row matrix data 11 R2 Row matrix data

5-8 TW7201I-MS

5: Testing and Troubleshooting

Table 5-6 Front Panel Processor J6 Pin Assignments

Pin Signal Description

12 R3 Row matrix data 13 R4 Row matrix data 14 R5 Row matrix data 15 R6 Row matrix data

Table 5-7 Front Panel Processor J7 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 PWR ON\ Power status (active low) 3 SQA Squelch receive audio (top of pot.) 4 RXAUDVOL V o lume-controlled receive audio (wiper of

volume potentiometer) 5 GND Chassis ground

Table 5-8 Front Panel Processor J8 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 CLCA Clarifier control A 3 CLCB Clarifier control B

Table 5-9 Front Panel Processor J9 and J10 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 RX AUDIO Receive audio 3 PTT Press-to-talk signal 4 TX AUDIO Transmit audio 5 CW KEY CW key input 6 +12V Unregulated +12 Vdc

TW7201I-MS 5-9

5: Testing and Troubleshooting

R16

C75

U13

C67 D7 D8

D1 D4

J12

J10

C68

C31 C30

R14

C64

C62 C28

R54

C13

R69

R34

TP1

R36

C29

C25

C24

R27

R25

U17

R26

U15

R55

R53

R52

C10

C12

C56

33 34

U16

TP2

C76

C79

C43

C34

U21

C58

C27

R65

R66

U18

C66 R38 R37 R24

L11

C32

C26

C33C35

C63

C61

R39

R68

R56 R58

R45 R41

OFF

R17 R15

R57

PF1

D11

R13

R29

C72

C14 C82

C42

R51

C15

R11

R10

R12

R62

R8 R7

C69

R28

J11

738207 REV. J

+ +

C47

C51

C53

C70

R46

C73

C49

C54

R40

C71

C23

RP1

C44

C78

C45

R72

R49

R48

C48

R50

C46

C52

R47

U14

C50

DS1

R43 D10 R42

C1C3

R70

C77

R18

C80

U12

C17

U11

C16

U10

R31

C74

R71

R19

R30

U19

C36

C22

R20

C20

C18

C19

C81

R32

C65

R21

Figure 5-1 Front Panel Processor Board Component Locations (738207 Rev. J)

5-10 TW7201I-MS

CW KEY

MIC AUDIO

HANDSET AUDIO

MIC AUDIO

HANDSET AUDIO

MIC AUDIO

HANDSET AUDIO

PA4

PA3

CLARIFIER

ROTARY

ENCODER

COM

CLARIFIER

ON/OFF

MIC

CONNECTOR

+12V

PTT

GND

MIC

CONNECTOR

+12V

CW KEY

PTT

GND

TW7000F VERSION

+12V

CW KEY

PTT

GND

+5V +5V

R54

R52 100K

100K

R55

4.7K

REV ECN DESCRIPTION DATE APPR

A 7000-290 RELEASE 13MAY98

+12V

PF1

R24

1M C27

C29

2.2

R25 33K

C8 .01

R51

47 1/2W

C28

+5V

RE5VA21AC

U16

27P

2.4576

27P

6-50P

SPKR1

U6B

U6A

SL6270

C32

2.2

4093

C24

2.2

U17

+5V

47K

R63

100K

SPICLK

SPITXD

SPIRXD

SCITXD

SCIRXD

SPICLK

SPITXD

SPIRXD

R26

1.2K

+5V

DNP 93C06

VDD

MC14531B

VSS

+12V

R17 470 1/4W

C67 C82

+5V

R6 100K

C13

C10

2.2

.02

+5V

R9 100K

C12

.02

R62

10K

C75 .01

C44 470

C51

100

U14

VCC

TDA2002

C47

GND

C48 .001

.01 .01

+12V

R15 470 1/4W

C68 .01

VDD

RESET 1

MC14528

RESET 2

VSS VSS VSS

1815

C45

0.1

R50

220 1/4W

R48 220 1/4W

R47

2.2 1/4W

C50

1.0

R72

1.5 1/2W

C52

0.1

R49 10 1/4W

C78

0.1

C31

C30

0.1

+5V

R16 47K

R13

D12

+5V

C11

2.2

+12V

C46

0.1

C53

470

C54 .01

47K C15 .01

+5V

R14

4.7K

47K

R11

47K C14 .01

+12V +5V

47K

56K

PN2222A

K1B

J10

J12

CLAR-B

CLAR-A

R53

D10

D11

L11

C25

0.1

C33

.01

U13

444

VPP VDD

RESET

IRQ

OSC1

OSC2

TCAP

TCMP

MC68HC705C8

PD7

PD6

PD4/SCK

PD3/MOSI

PD2/MISO

PD1/TDO

PD0/RDI

VSS

VDD

GND

+5V

C26

0.1

R27 470K

C34

C35

.001

Figure 5-2

Front Panel

Processor Board

Schematic Diagram

(994359 Rev. E)

5-11

+5V

C16

U10

VCC

SER

SCK

SLOAD

LCK

GND

R18 220

+5V

C20

0.1 R20

4.7K

2.2

74HC589

+5V

C17

2.2

U11

VDD

4051

I/O

INH

VEE

VSS

U12

C18

VDD

2.2 13

4051

I/O

INH

VEE

VSS

SPICLK

R12 47K

R10 47K

+5V

2.2

+5V

R64

100K

PA7

PA6

PA5

PA4

PA3

PA2

PA1

PA0

PB7

PB6

PB5

PB4

PB3

PB2

PB1

PB0

PC7

PC6

PC5

PC4

PC3

PC2

PC1

PC0

+5V

C23

2.2

Q7 J310

+5V

R56 470K

C69

R29

100

R57

C70

470K

.01

+5V

74HC259

CS1

CS2

OFF

VCC

GND

2.2

+5V

2.2

VCC

GND

RP1 100K

74HC137

R60

100

R41

47K

PN2222A

R28

470K

4.7K

C71

+12V

R40

4.7K

C77

.01

+5V

R42

+5V

1N4148

R58 470K

K1A

1N4148

J11

VCC

I0 74HC251 DE

GND

R70 620K

D10

1N4148

+5V

R59

470K Q8 J310

C72

+12V

+5V

PN2222A

+5V

C37

R30

0.1

470K

U19D

4093

R31

1M C36 .015

R45

4.7K

+5V

C19

2.2

C22

+5V

120P

R71 270K

U7B 4013

C73 .01

+12V

D11

2.2

Y-

+5V

R43

4.7K

C38 470

PN2222A

R19

150K

U19C

4093

C80

0.1

R33

10 1/4W

U19B

4093

VDD

RSTA

QA1

ENA

QA2

CLKA

QA3

QA4

4520

RSTB

QB1

ENB

QB2

CLKB

QB3

QB4

VSS

+5V

Q U7A 4013

R32

4.7K

C39

0.1

PN2222A

+12V

R46 220

U19A

4093

C40 1000

C81 .001

DS1 TC/SC/TA ALARM

C49

0.1

R21 470K

B 99-0267 REVISED PER ECO TW

C 01-0539 U15 WAS 78L05 D 03-0101 C40 WAS 100 UF E 05-0099 DNPU8

+12V

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

+5V

PB7

PB6

PB5

PB4

PB3

PB2

PB1

PA1

PA0

SPITXD

SPIRXD

SPICLK

PA5

PA6

PA7

PD7

SCITXD

SCIRXD

C55

0.1

R133

10K

SYNC

READY

+12V (HEATER)

CS 2

CS 1

SPITXD

CLKDIS

HEATER SW

SENSE 1

CONTRAST

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

+5V

GND

BKLT 1

BKLT 2

GND

+12V

PB7

PB6

PB5

PB4

PB3

PB2

PB1

PB0

FPCWKEY

FPCWA

FPWSP1

FPPTT

FPSPITXD

FPSPIRXD

FPSPICLK

FPBITE

ENA

FPWSP2

DHSLMSEL

FPTCALM

PRMICA

PWRON

EXTSPKR

CWKEY

MODEM EN

SQA

FPRXD

FPTXD

FPSP1

EXAUDPTT

BB 10-23-01 BB 04-16-03 BB 11-4-05

DISPLAY

BOARD

DISPLAY

BOARD

MOTHER

BOARD

10K

POWER SWITCH

VOLUME CONTROL

TW7201I-MS

4 INDUCTANCE IS IN MICROHENRYS 3 DIODES ARE 1N4148 2 CAPACITANCE IS IN MICROFARADS 1 RESISTANCE IS IN OHMS

UNLESS OTHERWISE SPECIFIED

NOTES:

+5V

U6E 4093

+5V

U7C

C64

4013

2.2 7

+5V

U18C

CA3240

C65

2.2

+5V

U19E

C66

4093

2.2 7

U6D

4093

C74

2.2 U6C

4093

+12V

U15 7805

+5V

Vin

C56

C58

0.1

C60

C59

100

0.1 16V

GND

C61 470

C62 100 16V

+5V

C63

0.1

Schematic

Title :

TW7201 FRONT PANEL

Drawn:

Size: Drawing Number:

Appr:

A.MARTINEZ

Date:

13MAY98

Date:

Date:File:

4-Nov-2005 14:01:34994359E.sch

994359

Time:

3030 Enterprise Ct. Vista, CA 92083 (760)597-3777

Rev:

Sheet of

5: Testing and Troubleshooting

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Designator Part Number Description

C1 241020 CAP,2.2MF DIP TANTALUM C10 254203 CAP,0.02MF 10% MYLAR C11 241020 CAP,2.2MF DIP TANTALUM C12 254203 CAP,0.02MF 10% MYLAR C13 241020 CAP,2.2MF DIP TANTALUM C14 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C15 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C16 241020 CAP,2.2MF DIP TANTALUM C17 241020 CAP,2.2MF DIP TANTALUM C18 241020 CAP,2.2MF DIP TANTALUM C19 241020 CAP,2.2MF DIP TANTALUM C2 241020 CAP,2.2MF DIP TANTALUM C20 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C22 210121 CAP,120 PF DISC NPO C23 241020 CAP,2.2MF DIP TANTALUM C24 241020 CAP,2.2MF DIP TANTALUM C25 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C26 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C27 241100 CAP,10MF DIP TANTALUM C28 241100 CAP,10MF DIP TANTALUM C29 241100 CAP,10MF DIP TANTALUM C3 241020 CAP,2.2MF DIP TANTALUM C30 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C31 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C32 241020 CAP,2.2MF DIP TANTALUM C33 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C34 241100 CAP,10MF DIP TANTALUM C35 210102 CAP,.001UF Y5P 50V 20% 0.1LS C36 254153 CAP,0.015MF 100V MYLAR C37 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C38 231471 CAP,A,470UF,16V,20%,RA,.20SP C39 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C4 210270 CAP,27PF NPO 50V 5% 0.1LS DISC

TW7201I-MS 5-13

5: Testing and Troubleshooting

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Designator Part Number Description

C40 231103 CAPACITOR,16V,1000 UF 10X16 C44 231471 CAP,A,470UF,16V,20%,RA,.20SP C45 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C46 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C47 241100 CAP,10MF DIP TANTALUM C48 210102 CAP,.001UF Y5P 50V 20% 0.1LS C49 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C5 210270 CAP,27PF NPO 50V 5% 0.1LS DISC C50 241010 CAP,1.0 MF DIP TANTALUM C51 231101 CAP,100U,16V,20%,RADIAL,.1SP C52 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C53 231471 CAP,A,470UF,16V,20%,RA,.20SP C54 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C55 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C56 241100 CAP,10MF DIP TANTALUM C58 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C59 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C6 261600 CAP,6-50PF,TRIMMER,GREEN C60 231101 CAP,100U,16V,20%,RADIAL,.1SP C61 231471 CAP,A,470UF,16V,20%,RA,.20SP C62 231101 CAP,100U,16V,20%,RADIAL,.1SP C63 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C64 241020 CAP,2.2MF DIP TANTALUM C65 241020 CAP,2.2MF DIP TANTALUM C66 241020 CAP,2.2MF DIP TANTALUM C67 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C68 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C69 241100 CAP,10MF DIP TANTALUM C7 241020 CAP,2.2MF DIP TANTALUM C70 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C71 241100 CAP,10MF DIP TANTALUM C72 241100 CAP,10MF DIP TANTALUM C73 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

5-14 TW7201I-MS

5: Testing and Troubleshooting

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Designator Part Number Description

C74 241020 CAP,2.2MF DIP TANTALUM C75 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C77 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C78 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C8 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C80 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C81 210102 CAP,.001UF Y5P 50V 20% 0.1LS C82 214103 CAP,C,0.01U,50,10%,X,RA,.1SP C9 241020 CAP,2.2MF DIP TANTALUM D1 320002 DIODE, 1N4148/1N4150 DO-35 D10 320002 DIODE, 1N4148/1N4150 DO-35 D11 320002 DIODE, 1N4148/1N4150 DO-35 D12 320002 DIODE, 1N4148/1N4150 DO-35 D2 320002 DIODE, 1N4148/1N4150 DO-35 D3 320002 DIODE, 1N4148/1N4150 DO-35 D4 320002 DIODE, 1N4148/1N4150 DO-35 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 D9 320002 DIODE, 1N4148/1N4150 DO-35 DS1 710104 BUZZER,MICRO J1 620050 HEADER 34PIN RT ANGLE J10 610103 HEADER,MLX,6PIN,.100 J11 614017 HEADER,30 PIN MALE 3 X 10 J12 610103 HEADER,MLX,6PIN,.100 J3 613155 CONN,BOTTOM ENTRY,12 PIN,GOLD J4 613155 CONN,BOTTOM ENTRY,12 PIN,GOLD J5 610105 HEADER, 1X2 W/LB-LOCK 0.1 TH J6 613156 CONNECTOR,15 PIN BOTTOM ENTRY J7 610215 HEADER,PIN 1X5 MLX 0.1 W/LOCK J8 610103 HEADER,MLX,6PIN,.100 J9 610103 HEADER,MLX,6PIN,.100

TW7201I-MS 5-15

5: Testing and Troubleshooting

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Designator Part Number Description

K1 540077 RELAY,SP PCB MOUNT L1 459032 IND ASY,3T#30 MAGNET 1-490201 L11 459032 IND ASY,3T#30 MAGNET 1-490201 L2 459032 IND ASY,3T#30 MAGNET 1-490201 L3 459032 IND ASY,3T#30 MAGNET 1-490201 L4 459032 IND ASY,3T#30 MAGNET 1-490201 L5 459032 IND ASY,3T#30 MAGNET 1-490201 L6 459032 IND ASY,3T#30 MAGNET 1-490201 L8 459032 IND ASY,3T#30 MAGNET 1-490201 L9 459032 IND ASY,3T#30 MAGNET 1-490201 PF1 550042 FUSE,POLY RESISTOR 1.4 AMPS Q1 310057 XISTOR,NPN,PN2222A,TO92 Q2 310057 XISTOR,NPN,PN2222A,TO92 Q4 310057 XISTOR,NPN,PN2222A,TO92 Q5 310057 XISTOR,NPN,PN2222A,TO92 Q6 310057 XISTOR,NPN,PN2222A,TO92 Q7 310033 XSTR, J310 N-JFET TO92 Q8 310033 XSTR, J310 N-JFET TO92 R1 113105 RES,1M 1/8W 5% CARBON FILM R10 113473 RES,47K 1/8W 5% CARBON FILM R11 113473 RES,47K 1/8W 5% CARBON FILM R12 113473 RES,47K 1/8W 5% CARBON FILM R13 113473 RES,47K 1/8W 5% CARBON FILM R133 113103 RES,10K 1/8W 5% CARBON FILM R14 113473 RES,47K 1/8W 5% CARBON FILM R15 124471 RES,470 OHM 1/4W 5% CF R16 113473 RES,47K 1/8W 5% CARBON FILM R17 124471 RES,470 OHM 1/4W 5% CF R18 113221 RES,220 OHM 1/8W 5% CF R19 113154 RES,150K 1/8W 5% CARBON FILM R2 113473 RES,47K 1/8W 5% CARBON FILM R20 113472 RES,4.7K 1/8W 5% CARBON FILM R21 113474 RES,470K 1/8W 5% CARBON FILM

5-16 TW7201I-MS

5: Testing and Troubleshooting

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Designator Part Number Description

R24 113105 RES,1M 1/8W 5% CARBON FILM R25 113333 RES,33K 1/8W 5% CARBON FILM R26 113122 RES,1.2K 1/8W 5% CARBON FILM R27 113474 RES,470K 1/8W 5% CARBON FILM R28 113474 RES,470K 1/8W 5% CARBON FILM R29 113101 RES,100 OHM 1/8W 5% CF R3 113473 RES,47K 1/8W 5% CARBON FILM R30 113474 RES,470K 1/8W 5% CARBON FILM R31 170213 RES,1M 20Y TRIMMER VRT R32 113472 RES,4.7K 1/8W 5% CARBON FILM R33 124100 RES,10 OHM 1/4W 5% CARBON FILM R4 113563 RES,56K 1/8W 5% CARBON FILM R40 113472 RES,4.7K 1/8W 5% CARBON FILM R41 113473 RES,47K 1/8W 5% CARBON FILM R42 113472 RES,4.7K 1/8W 5% CARBON FILM R43 113472 RES,4.7K 1/8W 5% CARBON FILM R45 113472 RES,4.7K 1/8W 5% CARBON FILM R46 113221 RES,220 OHM 1/8W 5% CF R47 124020 RES,2.2 OHM 1/4W 5% CF R48 124221 RES,220 OHM 1/4W 5% CF R49 124100 RES,10 OHM 1/4W 5% CARBON FILM R5 113473 RES,47K 1/8W 5% CARBON FILM R50 124101 RES,100 OHM 1/4W 5% CF R51 134470 RES,47 OHM 1/2W 5% CARBON FILM R52 113104 RES,100K 1/8W 5% CARBON FILM R53 113472 RES,4.7K 1/8W 5% CARBON FILM R54 113104 RES,100K 1/8W 5% CARBON FILM R55 113472 RES,4.7K 1/8W 5% CARBON FILM R56 113474 RES,470K 1/8W 5% CARBON FILM R57 113474 RES,470K 1/8W 5% CARBON FILM R58 113474 RES,470K 1/8W 5% CARBON FILM R59 113474 RES,470K 1/8W 5% CARBON FILM R6 113104 RES,100K 1/8W 5% CARBON FILM

TW7201I-MS 5-17

5: Testing and Troubleshooting

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Designator Part Number Description

R60 113101 RES,100 OHM 1/8W 5% CF R62 113103 RES,10K 1/8W 5% CARBON FILM R63 113104 RES,100K 1/8W 5% CARBON FILM R64 113104 RES,100K 1/8W 5% CARBON FILM R7 113472 RES,4.7K 1/8W 5% CARBON FILM R70 113624 RES,620K OHM 1/8W 5% R71 113274 RES,270K 1/8W 5% CARBON FILM R72 134015 RES,1.5 OHM 1/2W 5% CF R8 113472 RES,4.7K 1/8W 5% CARBON FILM R9 113104 RES,100K 1/8W 5% CARBON FILM RP1 182002 RES,9 X 100K PAK T1 410071 TRANSFORMER,50K/1K,CT,AUDIO U1 330348 IC,74HC259N U10 330381 IC,74HC589 U11 330194 IC CD4051BE U12 330194 IC CD4051BE U13 001-00144 SOFTWARE TW7000 FPNL PROC U14 330043 IC TDA2002-H TO220 U15 330015 IC, 7805 VREG 5V 1A 4% TO-220 U16 330341 IC, VOLTAGE DETECTOR U17 330029 IC, SL6270C VOGAD PREAMP DIP-8 U19 330342 IC,MC14093BCP U2 330349 IC, 74HC251N U3 330380 IC,74HC137 U4 330115 IC MC14528BCP U5 330130 IC,MC14531 PARITY TREE DIP16 U6 330342 IC,MC14093BCP U7 330040 IC,DIG,CD4013,DIP14,FLIP-FLOP U9 330057 IC CD4520BE XU13 621019 SOCKET, IC PLCC-44 XY1 364001 INSULATOR CRYSTAL HC25/U Y1 361085 XTAL,2.4576 MHZ

5-18 TW7201I-MS

5.3.2 DHSL Modem

Board

5: Testing and Troubleshooting

Table 5-11 DHSL Modem J1 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 GND Chassis ground 3 +12V Unregulated +12 Vdc 4 +12V Unregulated +12 Vdc 5 PB7 Parallel data input from fp processor 6 PB6 Parallel data input from fp processor 7 PB5 Parallel data input from fp processor 8 PB4 Parallel data input from fp processor 9 PB3 Parallel data input from fp processor 10 PB2 Parallel data input from fp processor 11 PB1 Parallel data input from fp processor 12 PB0 Parallel data input from fp processor 13 FPCWKEY CW key input (turns on the CW oscillator) 14 FPCWA Not used 15 FPSWP1 Not used (spare) 16 FPPTT Input from front panel processor that

indicates a front panel PTT 17 FPSPITXD Serial peripheral interface transmit data 18 FPSPIRXD Serial peripheral interface receive data 19 FPSPICLK Serial peripheral interface clock 20 FPBITE BITE output to transceiver processor 21 ENA Enable line for serial data input 22 FPSWP2 Spare port 23 DHSLMSEL DHSL modem select (high selects the

DHSL Modem board) 24 FPTCALM TC/SC/TA alarm output. Open collector

output from front panel. Goes to external

TC/SC/ TA alarm 25 PRMICA Processed microphone audio 26 PWRON\ Power on input (active low) 27 EXTSPKR External speaker output 28 CWKEY CW key line output

TW7201I-MS 5-19

5: Testing and Troubleshooting

Pin Signal Description

29 MODEM EN Modem enable line from Front Panel

30 SQA Audio (with squelch) output to speaker 31 FPRXD Receive modem data 32 FPTXD Transmit modem data 33 FPSP1 Not used 34 EXAUDPTT\ External audio PTT output to front panel

Pin Signal Description

1 GND Chassis ground

Table 5-11 DHSL Modem J1 Pin Assignments

Processor board

processor (active low)

Table 5-12 DHSL Modem J2 Pin Assignments

2 +12V +12 Vdc to DHSL Modem board 3 PWRON\ Power on line to DHSL Modem board

(active low)

Table 5-13 DHSL Modem J3 Pin Assignments

Pin Signal Description

1 REMRXA Not used 2 REMTXA Not used 3 GND Chassis ground 4 GND Chassis ground 5 DHSL1 DHSL modem line 1 6 DHSL2 DHSL modem line 2

Table 5-14 DHSL Modem J4 Pin Assignment

Pin Signal Description

1 GND Chassis ground 2 EXTSPKR External speaker output 3 TCALARM Alarm output

5-20 TW7201I-MS

5: Testing and Troubleshooting

Table 5-15 DHSL Modem J11 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 +12V No connection 3 SPIRXD No connection 4 SPICLK No connection 5 SPITXD No connection 6 RS232-2T RS-232 transmit line to ACC 1 7 RS232-2R RS-232 receive line to ACC 1 8 DCD\ DCD line to ACC 2 (active low) 9 NC CW key line to Power Supply/Interface

board 10 ECTXA Transmit audio to Audio board

(transceiver modem only) 11 NC No connection 12 NC No connection 13 EN12 No connection 14 GND Chassis ground 15 +12V No connection 16 SPITXD No connection 17 BITE No connection 18 RS232-1R RS-232 receive line to ACC 2 19 RS232-1T RS-232 transmit line to A CC 2 20 600TXA 600 ohm accessory transmit audio input

from either accessory connector 21 600RXA 600 ohm accessory receive audio output to

either accessory connector 22 ECRXA Receive audio from Audio board

(transceiver modem only) 23 EXAUPTT\ External audio PTT input from the Power

Supply/Interface board (active low) 24 FPWSP1 Spare channel to ACC 1 accessory

connector 25 FPWSP2 No connection

TW7201I-MS 5-21

5: Testing and Troubleshooting

Pin Signal Description

1 GND Chassis ground 2 RMTA0 Not used on TW7201I 3 RMTA1 Not used on TW7201I 4 RMTA2 Not used on TW7201I 5 RMTDATA Not used on TW7201I 6 RMTCLK Not used on TW7201I 7 RMTWR Not used on TW7201I 8 SYNC Serial synchronization line to processor 9 SER1TXD serial transmit line to processor

10 SER1RXD Serial receive line to processor

11 SER2TXD Serial transmit line to processor

Table 5-16 DHSL Modem J12 Pin Assignments

(transceiver). Handles control functions

(transceiver). Handles display data 12 SER2RXD Serial receive line to processor

(transceiver). Handles display data 13 RMTTXD Not used on TW7201I 14 GND Chassis ground 15 REMTXA Not used on TW7201I 16 REMRXA Not used on TW7201I 17 DHSL2 DHSL remote line to TW7201I 18 REMSP Not used on TW7201I 19 DHSL1 DHSL remote line to TW7201I 20 AUXPTT\ Auxiliary PTT line from transceiver ACC 1

ACC 2 connector (active low)

21 +12V +12 Vdc supply 22 NC No connection 23 LPB7 Not used 24 LPB6 Not used 25 RMTTXD Not used on TW7201I

5-22 TW7201I-MS

5.3.3 DHSL Jumper

Settings

5: Testing and Troubleshooting

Table 5-17 DHSL Modem Board Jumper Settings

Jumper Default Setting Jumper Default Setting Control Head Control Head

JU3 BC JU11 Not used JU4 AB JU12 Not used JU5 AB JU13 BC JU6 AB JU14 BC JU7 AB S1 1,2,5 on JU8 BC

3,4,6,7,8 off

JU9 AB U6 Not installed JU10 BC U7 Installed

Transceiver/master

JU3 BC JU11 Not used JU4 BC JU12 Not used JU5 BC JU13 BC JU6 BC JU14 BC JU7 BC S1 1,2,5 on JU8 BC

3,4,6,7,8 off

JU9 AB U6 Not installed JU10 BC U7 Installed

TW7201I-MS 5-23

5: Testing and Troubleshooting

C45

R55 R60

C4 C9 C7

C5 C8

U15

JU1

CBA

JU4

C18 C17

JU3

C12 C13

C10

C11 D6 D5

R11

R12

JU9 JU10

CBA

JU13

JU14

33 34

R8 R7 R6

R5 R4

C68

D17 R63

R64

R66 R67

C55

C53 C54

R32 R74 R71 R73

D21 D19

SW1

1 2 3 4 5 6 7 8

C52

R65 R70 R68

C61

R69

C57 C56

R72

C58C59

D22 D23 R13 R14

D8 D7

R16

D9 D10 R15 D12

738248 REV. E

D11

J12

C14

C22

R50

D16

R49

R76 D24

C46

R52

U14

C41

D15 R54 R53

C1 R2 R3 R1 R51

R38

R41 D14 R44 R42

R40 R39 D13

J11

C71

U17

C73

C50

C48

D1 D2

R22 R23

JU5 JU6 JU7 JU8

R34 R35

C37

C38

C72

C49

C70

R37 R36

C47

R59 R58

C40

R45 R43

C42

C31

C C36

C66

R29 R30

C25

R19

C51

R26 R28

C24

R57

U10

R56

C21

C23

D3 D4

R10

R78 R77

C29

C30

C27

U11

C26

U12

C28

R48 R46 R47

C44 R25 R24

U13

C35

R27

C67

R20

C69 C34

C33

C39

R31 D20 D18

C60

Figure 5-3 DHSL Modem Board Component Locations (738248 Rev. E)

5-24 TW7201I-MS

TW7201I-MS

Figure 5-4

DHSL Modem Board

Schematic Diagram

(994184 Rev. E)

5-25

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

(U14) 831403 WASHER INTERNAL LOCK #4 SS C1 241020 CAP,2.2MF DIP TANTALUM C10 241020 CAP,2.2MF DIP TANTALUM C11 241020 CAP,2.2MF DIP TANTALUM C12 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C13 241010 CAP,1.0 MF DIP TANTALUM C14 241010 CAP,1.0 MF DIP TANTALUM C17 241020 CAP,2.2MF DIP TANTALUM C18 241020 CAP,2.2MF DIP TANTALUM C21 210220 CAP,22PF NPO 50V 5% 0.1LS DISC C22 210220 CAP,22PF NPO 50V 5% 0.1LS DISC C23 241020 CAP,2.2MF DIP TANTALUM C24 241020 CAP,2.2MF DIP TANTALUM C25 241020 CAP,2.2MF DIP TANTALUM C26 241020 CAP,2.2MF DIP TANTALUM C27 241020 CAP,2.2MF DIP TANTALUM C28 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C29 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C3 241020 CAP,2.2MF DIP TANTALUM C30 241020 CAP,2.2MF DIP TANTALUM C31 241020 CAP,2.2MF DIP TANTALUM C32 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C33 241100 CAP,10MF DIP TANTALUM C34 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C35 241020 CAP,2.2MF DIP TANTALUM C36 241100 CAP,10MF DIP TANTALUM C37 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C38 241100 CAP,10MF DIP TANTALUM C39 241020 CAP,2.2MF DIP TANTALUM C4 241020 CAP,2.2MF DIP TANTALUM C40 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C41 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C42 214103 CAP,C,0.01U,50,10%,X,RA,.1SP

TW7201I-MS 5-27

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

C44 241020 CAP,2.2MF DIP TANTALUM C45 241100 CAP,10MF DIP TANTALUM C46 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C47 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C48 231101 CAP,100U,16V,20%,RADIAL,.1SP C49 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C5 241100 CAP,10MF DIP TANTALUM C50 231101 CAP,100U,16V,20%,RADIAL,.1SP C51 241100 CAP,10MF DIP TANTALUM C52 210102 CAP,.001UF Y5P 50V 20% 0.1LS C53 241100 CAP,10MF DIP TANTALUM C54 275101 CAP,ML NPO 100PF 100V 5% 0.2S C55 241100 CAP,10MF DIP TANTALUM C56 254153 CAP,0.015MF 100V MYLAR C57 254153 CAP,0.015MF 100V MYLAR C58 275101 CAP,ML NPO 100PF 100V 5% 0.2S C6 241100 CAP,10MF DIP TANTALUM C60 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C61 241020 CAP,2.2MF DIP TANTALUM C66 210102 CAP,.001UF Y5P 50V 20% 0.1LS C67 210102 CAP,.001UF Y5P 50V 20% 0.1LS C68 241020 CAP,2.2MF DIP TANTALUM C69 210102 CAP,.001UF Y5P 50V 20% 0.1LS C7 241020 CAP,2.2MF DIP TANTALUM C70 210102 CAP,.001UF Y5P 50V 20% 0.1LS C71 241100 CAP,10MF DIP TANTALUM C72 275104 CAP, 0.1UF X7R 50V 10% 0.1LS C73 231101 CAP,100U,16V,20%,RADIAL,.1SP C8 241100 CAP,10MF DIP TANTALUM C9 241100 CAP,10MF DIP TANTALUM D1 320002 DIODE, 1N4148/1N4150 DO-35 D10 320002 DIODE, 1N4148/1N4150 DO-35 D11 320002 DIODE, 1N4148/1N4150 DO-35

5-28 TW7201I-MS

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

D12 320002 DIODE, 1N4148/1N4150 DO-35 D13 320002 DIODE, 1N4148/1N4150 DO-35 D14 320002 DIODE, 1N4148/1N4150 DO-35 D15 320002 DIODE, 1N4148/1N4150 DO-35 D16 320002 DIODE, 1N4148/1N4150 DO-35 D17 320002 DIODE, 1N4148/1N4150 DO-35 D18 320002 DIODE, 1N4148/1N4150 DO-35 D19 320002 DIODE, 1N4148/1N4150 DO-35 D2 320002 DIODE, 1N4148/1N4150 DO-35 D20 320002 DIODE, 1N4148/1N4150 DO-35 D21 320002 DIODE, 1N4148/1N4150 DO-35 D22 320002 DIODE, 1N4148/1N4150 DO-35 D23 320002 DIODE, 1N4148/1N4150 DO-35 D24 320002 DIODE, 1N4148/1N4150 DO-35 D3 320002 DIODE, 1N4148/1N4150 DO-35 D4 320002 DIODE, 1N4148/1N4150 DO-35 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 D9 320002 DIODE, 1N4148/1N4150 DO-35 J1 620038 CONN HDR 2X17 SHROUDED PC MNT J11 613163 CONN,DB-25 RT ANGLE PC PLUG J12 613163 CONN,DB-25 RT ANGLE PC PLUG J2 610209 HEADER,MLX,3PIN,.156,POLAR J3 610197 HEADER,MLX,6PIN,.100 J4 610285 HEADER,PIN 1X3 MLX 0.1 W/LOCK JU1 620030 HEADER,3 PIN.025 SQ POST JU10 620030 HEADER,3 PIN.025 SQ POST JU13 620030 HEADER,3 PIN.025 SQ POST JU14 620030 HEADER,3 PIN.025 SQ POST JU3 620030 HEADER,3 PIN.025 SQ POST JU4 620030 HEADER,3 PIN.025 SQ POST

TW7201I-MS 5-29

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

JU5 614004 HEADER 3X4.1 LEAD SPACING JU6 614004 HEADER 3X4.1 LEAD SPACING JU7 614004 HEADER 3X4.1 LEAD SPACING JU8 614004 HEADER 3X4.1 LEAD SPACING JU9 620030 HEADER,3 PIN.025 SQ POST L3 459032 IND ASY,3T#30 MAGNET 1-490201 Q2 310052 XSTR, PN2907A PNP TO92 Q3 310033 XSTR, J310 N-JFET TO92 Q4 310057 XISTOR,NPN,PN2222A,TO92 Q5 310057 XISTOR,NPN,PN2222A,TO92 Q6 310057 XISTOR,NPN,PN2222A,TO92 Q7 310052 XSTR, PN2907A PNP TO92 R1 113101 RES,100 OHM 1/8W 5% CF R10 113104 RES,100K 1/8W 5% CARBON FILM R11 113103 RES,10K 1/8W 5% CARBON FILM R12 113474 RES,470K 1/8W 5% CARBON FILM R13 113472 RES,4.7K 1/8W 5% CARBON FILM R14 113472 RES,4.7K 1/8W 5% CARBON FILM R15 113221 RES,220 OHM 1/8W 5% CF R16 113221 RES,220 OHM 1/8W 5% CF R17 113102 RES, 1K, 1/8W, 5%, CF R18 113102 RES, 1K, 1/8W, 5%, CF R19 113106 RES,10M 1/8W 5% CARBON FILM R2 113101 RES,100 OHM 1/8W 5% CF R20 113472 RES,4.7K 1/8W 5% CARBON FILM R22 113103 RES,10K 1/8W 5% CARBON FILM R23 113103 RES,10K 1/8W 5% CARBON FILM R24 113103 RES,10K 1/8W 5% CARBON FILM R25 113103 RES,10K 1/8W 5% CARBON FILM R26 113103 RES,10K 1/8W 5% CARBON FILM R27 113103 RES,10K 1/8W 5% CARBON FILM R28 113103 RES,10K 1/8W 5% CARBON FILM R29 113103 RES,10K 1/8W 5% CARBON FILM

5-30 TW7201I-MS

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

R3 113101 RES,100 OHM 1/8W 5% CF R30 113103 RES,10K 1/8W 5% CARBON FILM R31 113103 RES,10K 1/8W 5% CARBON FILM R32 113103 RES,10K 1/8W 5% CARBON FILM R34 113103 RES,10K 1/8W 5% CARBON FILM R35 113103 RES,10K 1/8W 5% CARBON FILM R36 113102 RES, 1K, 1/8W, 5%, CF R37 113621 RES,620 OHM 1/8W 5% CF R38 113103 RES,10K 1/8W 5% CARBON FILM R39 113104 RES,100K 1/8W 5% CARBON FILM R4 113104 RES,100K 1/8W 5% CARBON FILM R40 113103 RES,10K 1/8W 5% CARBON FILM R41 113103 RES,10K 1/8W 5% CARBON FILM R42 113474 RES,470K 1/8W 5% CARBON FILM R43 113474 RES,470K 1/8W 5% CARBON FILM R44 113474 RES,470K 1/8W 5% CARBON FILM R45 113621 RES,620 OHM 1/8W 5% CF R46 113823 RES,82K 1/8W 5% CARBON FILM R47 113103 RES,10K 1/8W 5% CARBON FILM R48 113103 RES,10K 1/8W 5% CARBON FILM R49 113103 RES,10K 1/8W 5% CARBON FILM R5 113104 RES,100K 1/8W 5% CARBON FILM R50 113474 RES,470K 1/8W 5% CARBON FILM R51 1111502 RESISTOR 15K 1/8W 1% R52 113104 RES,100K 1/8W 5% CARBON FILM R53 113104 RES,100K 1/8W 5% CARBON FILM R54 113473 RES,47K 1/8W 5% CARBON FILM R55 113103 RES,10K 1/8W 5% CARBON FILM R56 113103 RES,10K 1/8W 5% CARBON FILM R57 113473 RES,47K 1/8W 5% CARBON FILM R58 113101 RES,100 OHM 1/8W 5% CF R59 113101 RES,100 OHM 1/8W 5% CF R6 113104 RES,100K 1/8W 5% CARBON FILM

TW7201I-MS 5-31

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

R60 113473 RES,47K 1/8W 5% CARBON FILM R61 113103 RES,10K 1/8W 5% CARBON FILM R62 113103 RES,10K 1/8W 5% CARBON FILM R63 113104 RES,100K 1/8W 5% CARBON FILM R64 113103 RES,10K 1/8W 5% CARBON FILM R65 113102 RES, 1K, 1/8W, 5%, CF R66 113103 RES,10K 1/8W 5% CARBON FILM R67 113103 RES,10K 1/8W 5% CARBON FILM R68 113103 RES,10K 1/8W 5% CARBON FILM R69 113103 RES,10K 1/8W 5% CARBON FILM R7 113104 RES,100K 1/8W 5% CARBON FILM R70 113273 RES,27K 1/8W 5% CARBON FILM R71 113152 RES,1.5K 1/8W 5% CARBON FILM R72 113104 RES,100K 1/8W 5% CARBON FILM R73 113272 RES,2.7K 1/8W 5% CARBON FILM R74 113473 RES,47K 1/8W 5% CARBON FILM R76 113104 RES,100K 1/8W 5% CARBON FILM R77 113104 RES,100K 1/8W 5% CARBON FILM R78 113104 RES,100K 1/8W 5% CARBON FILM R8 113104 RES,100K 1/8W 5% CARBON FILM R9 113104 RES,100K 1/8W 5% CARBON FILM S1 530010 SWITCH DIP 8 SECT SPST T1 410062 TRANSFORMER,DHSL U1 330273 IC 74HC595 U10 330482 IC,4069 HEX INVERTER U11 330485 IC, MC145503P U12 330484 IC,78LO9 9VOLT REGULATOR TO92 U13 330322 IC, MC33079 QUAD OP-AMP DIP-14 U14 330015 IC, 7805 VREG 5V 1A 4% TO-220 U15 330322 IC, MC33079 QUAD OP-AMP DIP-14 U17 330018 IC,VREG,78L08,TO94,8V U3 330489 IC,MC145428P U4 330489 IC,MC145428P

5-32 TW7201I-MS

5: Testing and Troubleshooting

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Designator Part Number Description

U5 330488 IC, MC145407P U6 621007 SOCKET, IC DIP-22 PIN U7 330487 IC,MC145426 80KBPS UDLT SLAVE U7 621007 SOCKET, IC DIP-22 PIN U8 330305 IC,74HC393 DBL RIPL CNTR DIP14 U9 330483 IC,74HC74 DUAL D FLIP FLOP Y1 360037 CRYSTAL HC18/U HOLDER 4.096MH

5.3.4 Power Supply/

Interface Board

Table 5-19 Power Supply/Interface Board J1 Pin Assignments

Pin Signal Description

1 DC IN DC input line (12 Vdc to 28 Vdc) 2 GND Chassis ground

Table 5-20 Power Supply/Interface Board J2 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 +12V +12 Vdc power line 3 PWR ON\ Power status (active low)

Table 5-21 Power Supply/Interface Board J3 Pin Assignments

Pin Signal Description

1 AC IN AC input line (120 VAC to 240 VAC) 2 AC IN Connected to pin 1 3 GND Chassis ground 4 T1 CTR TAP Transformer center tap to voltage selector

card

5 T1 CTR TAP Transformer center tap to voltage selector

card 6 AC RTN AC return line (neutral) 7 AC RTN Connected to pin 6

TW7201I-MS 5-33

5: Testing and Troubleshooting

Table 5-22 Power Supply/Interface Board J5 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 GND Chassis ground 3 +12V No connection 4 +12V No connection 5 SPIRXD No connection 6 SPITXD No connection 7 SPITCLK No connection 8 BITE\ No connection 9 PTT\ No connection 10 RS232-1R RS-232 receive line to ACC 2 11 RS232-2T RS-232 transmit line to ACC 1 12 RS232-1T RS-232 transmit line to ACC 2 13 RS232-2R RS-232 receive line to ACC 1 14 600TXA 600 ohm accessory transmit audio input

from either accessory connector 15 DCD\ Not used 16 600RXA 600 ohm accessory receive audio output to

either accessory connector 17 CWKEY CW key line to ACC 1 18 ECRXA No connection 19 ECTXA No connection 20 EXAUPTT\ External audio PTT output to modem board

(active low) 21 NC No connection 22 FPWSP1+ Spare channel to ACC 1 23 NC No connection 24 FPWSP2+ No connection 25 EN12 No connection 26 NC No connection

5-34 TW7201I-MS

5: Testing and Troubleshooting

Table 5-23 Power Supply /Interface Board J6 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 CWKEY CW key line to ACC 1 3 RS232-2R RS-232 receive line to ACC 1 4 NC No connection 5 NC No connection 6 DCD\ Not used 7 RS232-2T RS-232 transmit line to ACC 1 8 FPWSP1+ Modem receive audio input to ACC 1 9 NC No connection 10 NC No connection 11 BALRXA1 Balanced receive line to ACC 1 12 NC No connection 13 BALRXA2 Balanced receive line to ACC 1 14 NC No connection 15 BALTXA1 Balanced transmit line from ACC 1 16 NC No connection 17 BALTXA2 Balanced transmit line from ACC 1 18 NC No connection 19 EXAUPTT\ External audio PTT input from ACC 1

connector (active low) 20 NC No connection 21 NC No connection 22 NC No connection 23 NC No connection 24 NC No connection 25 12V +12 Vdc 26 12V +12 Vdc

TW7201I-MS 5-35

5: Testing and Troubleshooting

Table 5-24 Power Supply /Interface Board J7 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 GND Chassis ground 3 RS232-2R RS-232 receive line to ACC 2 4 NC No connection 5 PWRON\ Power status line (active low) 6 DCD\ Not used 7 NC No connection 8 NC No connection 9 NC No connection 10 NC No connection 11 BALRXA1 Balanced receive line to ACC 2 12 NC No connection 13 BALRXA2 Balanced receive line to ACC 2 14 TC/SC ALARM Transcall/Selcall alarm to external speaker

on ACC 2 15 BALTXA1 Balanced transmit line from ACC 2. 16 NC No connection. 17 BALTXA2 Balanced transmit line from ACC 2 18 EXTSPKR Speaker audio to external speaker to ACC 2

connector 19 EXAUPTT\ External audio PTT input from ACC 2

connector (active low) 20 NC No connection 21 RS232-1R RS-232 receive line to ACC 2 22 12V +12 Vdc supply 23 RS232-1T RS-232 transmit line to ACC 2 24 12V +12 Vdc supply 25 12V +12 Vdc supply 26 12V +12 Vdc supply

5-36 TW7201I-MS

5: Testing and Troubleshooting

Table 5-25 Power Supply /Interface Board J8 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 EXTSPKR Speaker audio to external speaker to

ACC 2

3 TC ALARM TC alarm to external speaker to ACC 2

Table 5-26 Power Supply /Interface Board J9 Pin Assignments

Pin Signal Description

1 GND Chassis ground 2 DHSL2 DHSL remote line to transceiver 3 12V +12 Vdc (strapped to pin 5) 4 REMRXA Not used on TW7201I 5 12V +12 Vdc 6 REMTXA Not used on TW7201I 7 REMSP No connection 8 PWR ON\ Power status line (active low) 9 DHSL1 DHSL remote line to transceiver 10 NC No connection

Table 5-27 Power Supply /Interface Board J10 Pin Assignments

Pin Signal Description

1 REMRXA Not used on TW7201I 2 REMTXA Not used on TW7201I 3 GND Chassis ground 4 GND Chassis ground 5 DHSL1 DHSL remote line to transceiver 6 DHSL2 DHSL remote line to transceiver

TW7201I-MS 5-37

5: Testing and Troubleshooting

C11

C10

C13

C12

738277 REV. B

C7 C8

BR1

TP1

J10

EBC

C33

C32

R33

R34

TP2

++++

C31

R32

R30

R29

C29

R31

FBFBFB

C34

C15

FBFB

C27

C17

C16

R13

R14

R23R28

R24

R21

R20

C30

C26

R22

R27

R19

2 J6

C22

C23

FBFB

C19

C28

Figure 5-5 Power Supply/Interface Board Component Locations (738277 Rev. B)

5-38 TW7201I-MS

TW7201I-MS

Figure 5-6

Power Supply/Interface Schematic Diagram

(994222 Rev. D) 5-39

5: Testing and Troubleshooting

Table 5-28 Power Supply/Interface Board Parts List (003-03005 Rev. G)

Designator Part Number Description

(T1) 876009 HIGH VOLTAGE LABEL RED/WHITE BR1 320502 BRIDGE RECT, 2A 600V C1 277104 CAP,C,0.1U,50,10%,X,AX,.25SP C10 233102 CAP, 1000UF 50V ELECT VRT C11 233102 CAP, 1000UF 50V ELECT VRT C12 277104 CAP,C,0.1U,50,10%,X,AX,.25SP C13 277103 CAP,C,0.01U,100,10%,X,AX,.25SP C14 277102 CAP,C,1000P,100,10%,X,AX,.25SP C15 277102 CAP,C,1000P,100,10%,X,AX,.25SP C16 241020 CAP,2.2MF DIP TANTALUM C17 241020 CAP,2.2MF DIP TANTALUM C19 277102 CAP,C,1000P,100,10%,X,AX,.25SP C2 241100 CAP,10MF DIP TANTALUM C22 277102 CAP,C,1000P,100,10%,X,AX,.25SP C23 277102 CAP,C,1000P,100,10%,X,AX,.25SP C26 241100 CAP,10MF DIP TANTALUM C27 277101 CAP,C,100PF,NPO,AX,5%,.25SP C28 277101 CAP,C,100PF,NPO,AX,5%,.25SP C29 241100 CAP,10MF DIP TANTALUM C3 277103 CAP,C,0.01U,100,10%,X,AX,.25SP C30 241100 CAP,10MF DIP TANTALUM C31 241100 CAP,10MF DIP TANTALUM C32 277102 CAP,C,1000P,100,10%,X,AX,.25SP C33 241100 CAP,10MF DIP TANTALUM C34 277103 CAP,C,0.01U,100,10%,X,AX,.25SP C35 241100 CAP,10MF DIP TANTALUM C4 232222 CAP,2200MF 35V ELECT C5 277103 CAP,C,0.01U,100,10%,X,AX,.25SP C6 231101 CAP,100U,16V,20%,RADIAL,.1SP C7 241020 CAP,2.2MF DIP TANTALUM C8 241020 CAP,2.2MF DIP TANTALUM C9 241020 CAP,2.2MF DIP TANTALUM D1 320101 DIODE, 1N4005 1A 600V DO-41

TW7201I-MS 5-41

Datron TW7201I Service guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Change Description

Safety Considerations

CONTENTS

INTRODUCTION

1.1 The TW7201I DHSL Remote Control Head

1.2 Specifications

1.3 TW7000 Series Family

1.4 Manual Conventions

1.5 Referenced Manuals

INSTALLATION

2.1 Installation Types

2.2 The TW7000 Transceiver and 7000RI Option

2.3 Audio Connections

Table 2-1 Audio Devices

Figure 2-1 TW7201I Front Panel

Figure 2-2 Microphone Jack J9 and J10 Pinouts

Table 2-2 Microphone Connector (J9) and (J10) Pin Assignments

2.4 Rear Panel Description

Figure 2-3 TW7201I Rear Panel

Figure 2-4 AC Voltage Selector Card

Figure 2-5 DB9 Remote Connector Pinout

Figure 2-6 DB Accessory Connector Pinout

Table 2-3 ACC 1 Accessory Connector Pin Assignments

Table 2-4 ACC 2 Accessory Connector Pin Assignments

OPERATION

3.1 Powering the TW7201I

Figure 3-1 TW7000 Front Panel

3.2 Using Knobs, Buttons and Indicators

3.3 VSWR Feature

3.4 Using Menus to Change Settings

Table 3-1 Alpha Menu

Table 3-2 ALE Submenu - ALPHA 17

3.5 Programming Channels and Frequencies

3.6 Scanning (for TA/TC only)

3.7 Placing an ALE Call

3.8 Placing a TransAdapt, Transcall or Selcall

3.9 Activating the Noise Blanker

3.10 Activating Encryption

3.11 Activating Voice Enhancement

THEORY OF OPERATION

4.1 TW7201I Assemblies

Figure 4-1 TW7201I Remote System

4.2 Front panel Assembly

Figure 4-2 Front Panel Assembly Block Diagram

Table 4-1 Jumper Block J11 Default Settings

4.3 Rear Panel Assembly

Figure 4-3 Power Supply/Interface Block Diagram

Figure 4-4 DHSL Modem Board Block Diagram (Remote Head)

4.4 7000RI Option

Figure 4-5 DHSL Modem Board Block Diagram (Transceiver)

TESTING AND TROUBLESHOOTING

Table 5-1 TW7201I Subassemblies

5.1 Test Procedures

5.2 Troubleshooting

5.3 Component Locations, Pin Assignments, Schematics and Part Lists

Table 5-2 Front Panel Processor J1 Pin Assignments

Table 5-3 Front Panel Processor J3 Pin Assignments

Table 5-4 Front Panel Processor J4 Pin Assignments

Table 5-5 Front Panel Processor J5 Pin Assignments

Table 5-6 Front Panel Processor J6 Pin Assignments

Table 5-7 Front Panel Processor J7 Pin Assignments

Table 5-8 Front Panel Processor J8 Pin Assignments

Table 5-9 Front Panel Processor J9 and J10 Pin Assignments

Figure 5-1 Front Panel Processor Board Component Locations (738207 Rev. J)

Table 5-10 Front Panel Processor Board Parts List (001-03001 Rev. E)

Table 5-11 DHSL Modem J1 Pin Assignments

Table 5-12 DHSL Modem J2 Pin Assignments

Table 5-13 DHSL Modem J3 Pin Assignments

Table 5-14 DHSL Modem J4 Pin Assignment

Table 5-15 DHSL Modem J11 Pin Assignments

Table 5-16 DHSL Modem J12 Pin Assignments

Table 5-17 DHSL Modem Board Jumper Settings

Figure 5-3 DHSL Modem Board Component Locations (738248 Rev. E)

Table 5-18 DHSL Modem Board Parts List (002-03100 Rev. L)

Table 5-19 Power Supply/Interface Board J1 Pin Assignments

Table 5-20 Power Supply/Interface Board J2 Pin Assignments