448 pages | 225 B/W Illus.
Telemetering systems and applications have moved far beyond the space flight telemetry most people have heard of to cutting-edge uses across a broad range of disciplines, including industry, medicine, and meteorology. To fully understand and participate in the acquisition of data this technology makes possible, scientists in these fields along with engineers new to telemetering require some background in the concepts, hardware, and software that makes the technology so valuable.
Introduction to PCM Telemetering Systems, Second Edition summarizes the techniques and terminology used in sending data and control information between users and the instruments that collect and process the data. It gives an overall systems introduction to the relevant topics in three primary areas: system interfaces; data transport, timing, and synchronization; and data transmission techniques. The topics addressed include sensor characteristics, user interface design, data filtering, data framing, statistical analysis, telemetry standards, time code standards, modulation techniques, and radio propagation. To reinforce understanding, each chapter includes exercises.
Rather than focusing on design specifics, which can change so rapidly with evolving technologies, the author centers his discussions on concepts and standards. This edition incorporates the latest standards, LabVIEW-based examples of telemetry and command processing, and simulations using multiSim and Commsim.
Organization of the Text
SECTION I - SYSTEM INTERFACES
Representative Sensor Technology
Smart Sensor Technology
MODELING AND CALIBRATION
Least Squares Fitting
User Interface Systems
Sampled versus Continuous Data
Software Filter Design
SECTION II - DATA TRANSPORT, TIMING, AND SYNCHRONIZATION
TELEMETRY FRAMES AND PACKETS
Telemetry Frame Design
Data Networking Packets
Command Processor Interface
Formatting for Transmission
TELEMETRY DATA SYNCHRONIZATION
TIME AND POSITION DETERMINATION
Definition of Time
Time Code Formats
Global Positioning System: Determining Time and Position
Verify-and-Execute Command Protocol
Packet Command Systems
SECTION III - DATA TRANSMISSION TECHNIQUES
Digital Transmission with Analog Modulators
Free Space Propagation
Atmospheric, Sun, and Ground Effects
Rain Effects Modeling
Each chapter also contains References and Problems