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Table of Contents
Summary of Contents for ATS 1225
- Page 1 MODEL 1225 TRANSCEIVER TECHNICAL MANUAL produced by: APPLIED TECHNOLOGY SOLUTIONS, INC. 4200-F Technology Court Chantilly, VA 20151 This manual contains information proprietary to Applied Technology Solutions, Inc. and may not be re-produced without expressed permission.
- Page 2 MODEL 1225 TRANSCEIVER TECHNICAL MANUAL produced by: APPLIED TECHNOLOGY SOLUTIONS, INC. 4200-F Technology Court Chantilly, VA 20151 Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: ii...
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Page 3: Table Of Contents
TITLE PAGE INTRODUCTION ...........................1 GENERAL ...............................1 SPECIFICATIONS..........................1 CONTROLS, INDICATORS, USER I/O....................3 OPERATION............................4 GENERAL ...............................4 ATS 1200 SYSTEM COMPONENTS....................4 MODEL 1225 OPERATION ........................4 2.2.1 Safety Considerations........................4 EARPIECE/MICROPHONE ASSEMBLY....................5 BATTERY ...............................5 ANTENNA ..............................5 PRIVACY CODES..........................5 THREE THEORY OF OPERATION ........................6 GENERAL ...............................6 FUNCTIONAL DESCRIPTION......................6... - Page 4 APPLIED TECHNOLOGY SOLUTIONS, INC. TROUBLESHOOTING ..........................9 MAINTENANCE ............................9 REPAIRS ..............................9 Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: iv...
- Page 5 APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: v...
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Page 6: One Introduction
This document is the Operating Manual for the Model 1225 Hand Held Transceiver produced by Applied Technology Solutions, Inc. The Model 1225 is one component of the Voice Privacy Low Probability of Detection (VPLPD) System 1200. Other System 1200 components include the Model 1245 Monitor System and the Series 1250 Transmitters. - Page 7 APPLIED TECHNOLOGY SOLUTIONS, INC. RF CHARACTERISTICS VOICE DATA SCRAMBLING RF Channels: 2, Crystal Controlled Type: Synchronous Key Stream Normal Mode: Transmit/Receive Channel A Key Generation: External, Hand Held, Model or B 1260 Key Loader Repeater Mode: Transmit Channel A, Receive Key Storage: Internal, non-volatile memory on Channel B...
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Page 8: Controls, Indicators, User I/O
A rear panel connector accessed by sliding the door. Connecting the Model 1260 Key Loader to this port, privacy codes can be downloaded from the loading device to the Model 1225 where they are stored in non-volatile memory. Operating power for the Model 1260 is supplied from this connector. -
Page 9: Two Operation
The Model 1225 Hand Held unit only transmits when the PTT switch is depressed. The integral, side panel mounted PTT is a momentary switch and must be held down for the duration of the transmit interval. The Model 1225 also includes an integral microphone and speaker. The microphone is sensitive and should be held several inches away from the mouth when transmitting. -
Page 10: Earpiece/Microphone Assembly
To load a P code into the Model 1225, use the Model 1230-03 Adapter Cable to connect the Model 1260 Key Loader to the key loader connector located on the bottom of the Model 1225. The POWER indicator on the Model 1260 should light (providing the Model 1225 is powered on). -
Page 11: Three Theory Of Operation
Model 1225 its low probability of detection and interception characteristics. FUNCTIONAL DESCRIPTION The Model 1225 block diagram can be divided into two sections. The upper half contains the digital and audio signal processing functions. The lower half contains the IF and RF signal processing functions. -
Page 12: Rf/If Section
The audio output from the CVSD decoder is lowpass filtered to remove high frequency switching components. The Model 1225 has two audio amplifiers. One drives the internal speaker, while the other is used with the external speaker/microphone. A common volume control sets the gain of both amplifiers. The power on/off switch is integrated with the volume control. -
Page 13: Rf Characteristics
Channel A or Channel B operation. RF CHARACTERISTICS In rural areas, the Model 1225 provides line-of-site communication range with a practical limit of approximately 3 miles over normal terrain. Suburban communication range is affected by reflections and fading with a 0.5 mile radius being typical. -
Page 14: Four Maintenance
Return the unit to the factory for repair. MAINTENANCE The Model 1225 is designed for simple installation and use. There are no user maintenance requirements. KEY LOADER If the LOAD FAIL indicator lights, the key load sequence did not succeed. If the this occurs... - Page 15 APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: 10...
- Page 16 APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: 11...
- Page 17 APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: 12...
- Page 18 APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: 13...
- Page 19 APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.wpd issued: jan99 revised: July 27, 1999 page: 14...
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