ATS SERIES 1250 TRANSMITTER TECHNICAL MANUAL produced by: APPLIED TECHNOLOGY SOLUTIONS, INC. 4200-F Technology Court Chantilly, VA 22021 This manual contains information proprietary to Applied Technology Solutions, Inc. and may not be re-produced without expressed permission.
ATS SERIES 1250 TRANSMITTER TECHNICAL MANUAL produced by: APPLIED TECHNOLOGY SOLUTIONS, INC. 4200-F Technology Court Chantilly, VA 22021 DOCUMENT: fcc1250MAN.
APPLIED TECHNOLOGY SOLUTIONS, INC. TABLE OF CONTENTS SECTION TITLE PAGE ONE INTRODUCTION ...................................................................................................................................1 1.0 INTRODUCTION ...................................................................................................................................1 1.1 SPECIFICATIONS.................................................................................................................
APPLIED TECHNOLOGY SOLUTIONS, INC. 4.1.1 4.1.2 Audio/Digital Section................................................................................................................7 IF/RF Section ............................................................................................................................8 4.2 RF CHARACTERISTICS .......................................................................................................................8 FIVE MAINTENANCE .......................
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION ONE INTRODUCTION 1.0 INTRODUCTION This document is the Operating Manual for the Series 1250 Transmitters, produced by Applied Technology Solutions, Inc. The Series 1250 includes the Models 1252 and 1253. Functionally and mechanically, both are identical with the exception being their transmit frequency assignment. As such, the use in this document of the terminology Series 1250, refers to both models in the series.
APPLIED TECHNOLOGY SOLUTIONS, INC. RF CHARACTERISTICS POWER Channels: One (1), Factory set Channel Options Compatibility Channel A: Direct and repeater Channel B: Direct RF Power Output: 25 mW Frequency Stability: Naked Flatpack Power Source: ±100 ppm @ -25° C to +68° Stand Alone Power Source: Operating Time: One Mallory 7K-6V alkaline battery 1.5 hours, typical Power Source: Operating Time: 4 AAA alkaline battery 6.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION TWO INSTALLATION 2.0 GENERAL The Series 1250 Transmitters are designed for body worn or concealment applications. The Series 1250 Transmitters include an internal microphone and have connectors for antenna and power as well an external microphone. In its basic, or Naked, configuration, the user must connect antenna and power to the unit using the connectors. 2.1 CHANNEL SELECTION Channel Selection for the Series 1250 Transmitters are factory pre-set.
APPLIED TECHNOLOGY SOLUTIONS, INC. ATS has developed two antennas for use with the Series 1250 Transmitters and the Model 1250-04 J Battery Holder. The Model 1250-02 Antenna was developed for use with Models 1252 and 1253. The antennae are low profile and incorporate a connector to mate with the transmitter connector. The antenna also contains a captured screw which fastens into the transmitter. Use of these antennas provides a compact, integral unit.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION THREE OPERATION 3.0 GENERAL The Series 1250 Transmitters are one device in a family of devices designed to provide secure communications and surveillance capabilities to law enforcement agencies. This section describes the operation of the Series 1250 Transmitters with the other units in the VPLPD System 1200. 3.1 SYSTEM 1200 COMPONENTS The System 1200 components include the Model 1245 Monitor Station and the Model 1225 Hand-Held Transceiver. 3.1.
APPLIED TECHNOLOGY SOLUTIONS, INC. Model 1240. If the LOAD FAIL indicator lights, the key load sequence did not succeed. If this occurs, check the setting of the KEY NUMBER switches to ensure that it is not set above 300. Verify that the interface plug on the Model 1260 cable is fully seated into the KEY LOADER connector on the Key Load Adapter. Continuing LOAD FAIL indications mean that either the Model 1260 or the Series 1250 is defective and should be returned for repair.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION FOUR THEORY OF OPERATION 4.0 GENERAL The Series 1250 devices are miniaturized, transmit-only devices. They use spread spectrum modulation and low power output to provide LPI/LPD characteristics. The devices were designed for body worn applications but may also be planted or hidden in other objects.
APPLIED TECHNOLOGY SOLUTIONS, INC. the spread data signal, which along with the PN sequence, is biphase modulated by the clock signal from the modulator clock generator. Further processing of these signals occurs outside the FPGA. Two clock generator circuits are included in the FPGA, both being driven from the same crystal oscillator stage. The data clock generator has three outputs, the PN clock, the scrambler clock and the CVSD clock.
APPLIED TECHNOLOGY SOLUTIONS, INC. Figure 4-1 Series 1250 Block Diagram DOCUMENT: fcc1250MAN.
APPLIED TECHNOLOGY SOLUTIONS, INC. Digital Board Schematic DOCUMENT: fcc1250MAN.
APPLIED TECHNOLOGY SOLUTIONS, INC. RF Board Schematic DOCUMENT: fcc1250MAN.
APPLIED TECHNOLOGY SOLUTIONS, INC. SECTION FIVE MAINTENANCE 5.0 TROUBLESHOOTING When supplied with power, the Series 1250 devices should be actively transmitting. This can be verified using one of the other System 1200 devices to receive the transmitted signal. a. b. c. d. e. Verify that the antenna is properly connected to the antenna jack. Verify the shorting plug, or external microphone, is firmly in place.
