Introduction to Circuit Conditioning

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Introduction to Circuit Conditioning
Introduction to Circuit Conditioning
General
General (continued)
Table of Contents
Table of Contents (Cont)
Description of the Improvements Made in Communication Circuits Over the Last Decade
Lesson 1. Communication Circuit Quality
Learning Event 2: Effect of Noise
Learning Event 3: Suppression of Manmade Noise
Learning Event 4: Improving the Signal-to-Noise Ratio
Techniques.
Radio receiver.
Peak limiters.
Learning Event 5: Interference
Learning Event 6: Distortion
Learning Event 7: Long-distance communications networks
Equalization.
Learning Event 9: Telegraph Signal Quality
Sources of telegraph distortion.
Data-transmission.
Serial-Parallel transmission.
Figure 1. Serial-parallel conversion, block diagram.
Learning Event 10: Communications control
Learning Event 12: Standards for Noise Measurement
Units of noise measurement.
Calculations.
Practice Exercise
Practice Exercise (cont)
Practice Exercise (cont)
Practice Exercise (cont)
Practice Exercise (cont)
Practice Exercise (cont)
Lesson 1. Communication Circuit Quality
Lesson 2. Concepts of Circuit Conditioning
Figure 2. Basic conditions for circuit conditioning, block diagram.
DCA circuit specifications.
Read and study.
Impedance matching.
Learning Event 4: Precautions in Tesing DC Circuits
Circuit categories.
Enclosure 1
24 tests listed in DCAC 300-175-9 Extract
Frequency response (insertion loss).
Frequency response (insertion loss). (Cont)
Listing of characteristics.
Learning Event 6: Expanded Circuit Parameters
Practice Exercise
Practice Exercise (Cont)
Practice Exercise (Cont)
Practice Exercise (Cont)
Practice Exercise (Cont)
Practice Exercise (Cont)
Lesson 2. Concepts of Circuit Conditioning
Lesson 3. Circuit Conditioning Test Sets
Learning Event 2: Corrective Devices
Figure 3. Transmission Impairment Measuring Set (TIMS) HP Model 4940A
Operational controls.
Digital display.
Measurement switch.
Transmitter controls.
15 push button switches
Noise filter.
Display key.
Nonlinear distortion.
Learning Event 4: TIMS Replacement
Figure 4. Telephone Test Set AN/USM-181.
Learning Event 6: Noise-Level-VU Measuring Set, Model TTS-37B.
Sensitivity.
Figure 5. Measuring set noise-level-VU, Model TTS-37B and TTS-37BR
Learning Event 7: Tektronix Oscilloscope AN/USM-281C.
Figure 6. Oscilloscope, AN/USM-281C.
Learning Event 8: Delay Equalizer Group, OA-880/FTC (UE-5).
Figure 7. Delay equalizer group, OA-880/FTC (UE-5)
Practice Exercise
Practice Exercise (Cont)
Practice Exercise (Cont)
Practice Exercise (Cont)
Lesson 3. Conditioning test Set
TM Extract Lesson 2
Table 1. DCS Technical Schedules for Government-Owned Circuits
Table 1. DCS Technical Schedules for Government-Owned Circuits (Cont)
Table 1. DCS Technical Schedules for Government-Owned Circuits (Cont)
Table 1. DCS Technical Schedules for Government-Owned Circuits (Cont)
Table 1. DCS Technical Schedules for Government-Owned Circuits (Cont)
Table 1. DCS Technical Schedules for Government-Owned Circuits (Cont)
Table 2. DCS Technical Schedules for Government-Owned Circuits (Circuit Parameters)
Table 2. DCS Technical Schedules for Government-Owned Circuits (Circuit Parameters) (Cont)
Table 2. DCS Technical Schedules for Government-Owned Circuits (Circuit Parameters) (Cont)
Table 2. DCS Technical Schedules for Government-Owned Circuits (Circuit Parameters) (Cont)
Table 2. DCS Technical Schedules for Government-Owned Circuits (Circuit Parameters) (Cont)
Table 3. DCS Technical Schedules for Government-Owned Circuits Group Bandwidth Circuits - FDM or Data Derived
Table 3. DCS Technical Schedules for Government-Owned Circuits Group Bandwidth Circuits - FDM or Data Derived (cont)
Table 3. DCS Technical Schedules for Government-Owned Circuits Group Bandwidth Circuits - FDM or Data Derived (cont)
Table 4. DCS Technical Schedules for Government-Owned Circuits Z1, Z2, Z3 Technical Schedules
Table 4. DCS Technical Schedules for Government-Owned Circuits Z1, Z2, Z3 Technical Schedules (Cont)
Footnotes to Table 4
Table 5. Cross-Reference Between Description of DCS Service Item Number and Applicable Circuit Parameter Code
TM Extracts Lesson 3
Table 8-1. Controls, Jacks and Switches
Table 8-1. Controls, Jacks and Switches (Cont)
TM Extracts Lesson 3
Figure
Figure 3-1. Oscilloscope controls, indicators, devices and connectors
Table 3-1. Controls, indicators, devices and connectors
Table 3-1. Controls, indicators, devices and connectors (Cont)
Table 3-1. Controls, indicators, devices and connectors (Cont)
Table 3-1. Controls, indicators, devices and connectors (Cont)
Practice Exercise/Solution Sheet
Practice Exercise/Solution Sheet (Cont)
Practice Exercise/Solution Sheet (Cont)
Practice Exercise/Solution Sheet (Cont)
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Introduction to Circuit Conditioning

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