ATS 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.
ATS MODEL 1225 TRANSCEIVER TECHNICAL MANUAL produced by: APPLIED TECHNOLOGY SOLUTIONS, INC. 4200-F Technology Court Chantilly, VA 20151 Document: FCC1225manual.
APPLIED TECHNOLOGY SOLUTIONS, INC. TABLE OF CONTENTS SECTION TITLE PAGE ONE INTRODUCTION ...................................................................................................................................1 1.0 GENERAL ...............................................................................................................................................1 1.1 SPECIFICATIONS..........................................................................................................
APPLIED TECHNOLOGY SOLUTIONS, INC. 4.0 TROUBLESHOOTING ..........................................................................................................................9 4.1 MAINTENANCE ....................................................................................................................................9 4.2 REPAIRS .................................................................................................................................................
APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION ONE INTRODUCTION 1.0 GENERAL 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.
APPLIED TECHNOLOGY SOLUTIONS, INC. RF CHARACTERISTICS RF Channels: 2, Crystal Controlled Normal Mode: Transmit/Receive Channel A or B Repeater Mode: Transmit Channel A, Receive on Channel B Transmit 900 mW Power Output: Emissions Spurious: Out Of Band: Freq.
APPLIED TECHNOLOGY SOLUTIONS, INC. 1.2 CONTROLS, INDICATORS, USER I/O This section describes the user interfaces and indicators provided by the Model 1225 Hand Held Transceiver. USER CONTROLS VOLUME Dual function rotary switch. It is the power on/off switch plus volume control CHAN The channels are A, B and R where R refers to repeater operation. CODE A two position switch allowing selection of either the common (C) or private (P) code.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION TWO OPERATION 2.0 GENERAL The ATS Model 1225 Hand Held Transceiver is one of the System 1200 devices. The System 1200 devices were designed to provide secure communications to law enforcement agencies. This section describes the operation of the Model 1225 with the other units in the System 1200 family. 2.1 ATS 1200 SYSTEM COMPONENTS The ATS System 1200 includes the Model 1245 monitor Station and the Series 1250 Transmitters. 2.
APPLIED TECHNOLOGY SOLUTIONS, INC. 1. 2. Hold the radio so that the antenna is away from the face and body, minimally 2-3", when transmitting and, Minimize transmit time to approximately 1 ½ minute duration over a 15 minute interval. 2.3 EARPIECE/MICROPHONE ASSEMBLY Optionally, the Model 1230-04 Surveillance Microphone/Earpiece Assembly can be used with the Model 1225 Hand Held Transceiver. This assembly includes a covert PTT microphone and a covert earpiece that can be hooked over the ear.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION THREE THEORY OF OPERATION 3.0 GENERAL The Model 1225 Hand Held Transceiver is a push-to-talk, spread spectrum transceiver. It uses digitized audio. The digital data stream is scrambled before modulation for security. The combination of spread spectrum modulation and scrambled, digitized audio give the Model 1225 its low probability of detection and interception characteristics. 3.
APPLIED TECHNOLOGY SOLUTIONS, INC. descrambler removes the scrambler key stream from the baseband data signal to recover the CVSD RX data signal. This signal is output from the FPGA to the CVSD decoder. The decoder converts this data stream to an analog audio signal. 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.
APPLIED TECHNOLOGY SOLUTIONS, INC. mixers. The state of the CHANNEL logic signal from the FPGA causes the local oscillator to output the appropriate frequency for either Channel A or Channel B operation. 3.2 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.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION FOUR MAINTENANCE 4.0 TROUBLESHOOTING When supplied with power, the top panel PWR LED should light. If the PWR LED blinks, the battery is low and must be replaced or recharged. If the PWR LED does not illuminate at all, verify LED operation by keying the transmitter and verifying the TX indicator lights. If the TX LED does not illuminate, attach different battery pack and retry. If the LED still does not illuminate return the unit for repair.
APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.
APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.
APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.
APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.
APPLIED TECHNOLOGY SOLUTIONS, INC. Document: FCC1225manual.
