Plan/Design/Layout of Satellite Communications Systems

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Plan/Design/Layout of Satellite Communications Systems
Plan/Design/Layout of Satellite Communications Systems
Subcourse Overview
Table of Contents
Table of Contents-cont.
Lesson 1: Overview and Capabilities of a Satellite Communications
Learning Event 1: Requirements for Improved Communications
Learning Event 2: Requirements for A Military Communications System
Invulnerability.
Learning Event 3: Limitations of Present Long-Distance Trunking System
VHF and UHF limitations.
Learning Event 4: Advantages of Satellite Communications
Learning Event 5: Application to the Defense Communications System
Learning Event 6: Past Efforts and Results in Space Communications
Project Westford.
Project SYNCOM.
Learning Event 7: Appkications of Satellite Communications
Learning Event 8: Satellite Communications System Concept
Telegraph multiplexing.
Total distortion.
Learning Event 9: Digitized Communications System
Figure 14. Vocoder applied to telephone channels of a satellite communications system.
Disadvantages
Figure 1-3. Securing all channels with a single device.
Signal quality
Learning Event 11: Communications Via Satellites
Table 1-1. Altitude versus orbital speed.
Learning Event 13: Passive Communications Satellite System
Figure 1-5. A passive satellite communications system.
Figure 1-7. A satellite tracking antenna.
Learning Event 14: Active-Repeater-Orbital Satellite Communications
Doppler shift.
Learning Event 16: System Characteristics
Real-time repeater system.
Store-and-forward system.
Near-synchronous system.
Learning Event 17. Radio Links Between Ground Terminals and a Synchronous Satellite
Figure 1-9. A synchronous satellite link communications system.
Learning Event 18: Block Diagram of a Synchronous Communications Satellite
Assigned frequencies
Telemetry.
Learning Event 19: Near-Synchronous Communications Satellite
Stabilization.
Lesson 1 Practice Exercise
Lesson 1 Practice Exercise Answer Key and Feedback
Lesson 2: Transmitting Systems and RF Components
Section 1: Waveguide Principles
Figure 2-1. Waveguide transformer.
Figure 2-2. Twisted section of waveguide.
Figure 2-4. Sharp bends.
Figure 2-5. Flexible waveguide.
Section 2: Antenna Feed Systems
Figure 2-7. Dipole termination of a waveguide.
Figure 2-8. Tapered horn antenna.
Figure 2-9. Reflector feed systems.
Figure 2-10. Cassegrainian antenna.
Section 3: Modulator Analysis
Figure 2-13. Simplified modulator unit.
Section 4: Indirect-Angle-Modulated Transmitter
Learning Event 17: Baseband Circuits
Section 5. Direct-Angle-Modulated Transmitter
Figure 2-15. Direct-angle-modulated transmitter.
Learning Event 28: Power Amplifier
Section 6. Transmitter Analysis
Figure 2-16. Frequency generator subsystem.
Figure 2-17. Transmitter subsystem.
Learning Event 35: Power Amplifier
Learning Event 36: Fault Detection-cont.
Lesson 2 Practice Exercise
Lesson 2 Practice Exercise Answer Key and Feedback
Lesson 3: Receive Systems and Parameters
Section 1. Interference
Learning Event 4: Seasonal
Learning Event 7: Internal and Manmade
Section 2. Noise Measurements
Table 3-1. Temperature conversion factors.
Learning Event 9: Noise Figure
Learning Event 10: Equivalent Noise Temperature
Learning Event 11: Factor Method of Determining Noise Contribution
Section 3. Noise Measuring Techniques
Section 4. Parameter Control
Learning Event 16: Improvement Factor-cont.
Figure 3-1. S/N versus C/N for frequency modulation.
Section 5. receiver Control Circuits
Figure 3-2. FMFB block diagram.
Learning Event 18: Frequency-Modulation Feedback-cont.
Figure 3-3. RF carrier-to-noise threshold.
Figure 3-4. FMFB effects on carrier deviation.
Figure 3-5. Frequency-sensitive AFC circuit.
Figure 3-6. Phase-sensitive AFC loop.
Section 6. Frequency-Modulation Feedback Receiver
Figure 3-7. Simplified FMFB receiver block diagram.
Section 7. Phase-Lock Receiver
Figure 3-8. Simplified phase-lock receiver block diagram.
Learning Event 30: Converter
Learning Event 33: Demodulator
Learning Event 33: Demodulator-cont.
Learninf Event 34: Baseband Amplifier
Learning Event 36: Measuring Power Losses and Gains
Figure 3-9. Transmission line with 50 percent power loss.
Table 3-3. Logarithms.
Figure 3-10. Repeater providing power gain.
Table 3-4. Formulas.
Figure 3-12. The use of a reference level.
Figure 3-13. How dBm is used in a telephone system.
Figure 3-14. Use of oscillator and transmission measuring set.
Summary-cont.
Lesson 3 Practice Exercise
Lesson 3 Practice Exercise Answer Key and Feedback
Lesson 4: Single Channel Satellite Systems
Learning Event 2: Deployment
Learning Event 4: System Configuration
Learning Event 5: Antijamming and ECCM Techniques
Figure 4-1. Manpack system concept of operation.
Figure 4-2. Manpack system typical employments.
Figure 4-3. Special Forces BCS concept of operation.
Figure 4-4a. AN/PSC-3( ) with OA-8990( )/P DMGD.
Figure 4-4b. Radio set AN/PSC-3( ) components.
Figure 4-6. Medium-gain antenna AS-3567( )/PSC-3.
Figure 4-7. Hi- and low-gain (whip) antennas.
Lesson 4 Practice Exercise
Lesson 4 Practice Exercise Answer Key and Feedback
Lesson 5: Multichannel Satellite Communications Systems
Section 1. Multichannel Satellite Systems
Multipoint operations via satellite
Figure 5-1. Terminals in a point-to-point configuration.
Figure 5-3. Terminals in a mesh or hybrid configuration.
Learning Event 3: Employment
Learning Event 4: Control and Management
RSSC GMF manager.
Learning Event 5: System Configuration
Learning Event 6: Antijamming and ECCM Techniques
Learning Event 7: Data Entry
Operating parameters
Figure 5-4. Example of a GMF mission order for AN/TSC-85B.
Figure 5-5. Example of a GMF mission order for AN/TSC-93B.
Section 2. Multichannel Control System
Figure 5-6. Earth coverage areas of a five-satellite system.
Learning Event 10: Employment-cont.
Learning Event 10: Employment-cont.
Learning Event 11: Control and Management
Learning Event 11: Control and Management-cont.
Learning Event 12: System Configuration
Learning Event 13: Antijamming and ECCM Techniques
Learning Event 14: Data Entry
Learning Event 14: Data Entry-cont.
Figure 5-7. Sample SAR.
Figure 5-7. Sample SAR-cont.
Figure 5-7. Sample SAR-cont.
Figure 5-8. Sample SAA.
Figure 5-8. Sample SAA-cont.
Figure 5-8. Sample SAA-cont.
Figure 5-8. Sample SAA-cont.
Lesson 5 Practice Exercise
Lesson 5 Practice Exercise Answer Key and Feedback
Lesson 6: Special Communications Systems (SCS) and Military Strategic Tactical Relay (MILSTAR)
Section 1. Special Communications Systems
Learning Event 4: Control and Management
Learning Event 5: Antijamming and ECCM Techniques
Learning Event 7: Deployment
System characteristics.
Learning Event 9: Control and Management
TRANSEC/COMSEC management.
Lesson 6 Practice Exercise
Lesson 6 Practice Exercise Answer Key and Feedback
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Plan/Design/Layout of Satellite Communications Systems

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