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TM 11-6625-1576-15 DEPARTMENT OF THE ARMY TECHNICAL MANUAL ORGANIZATIONAL, DS, GS, AND DEPOT MAINTENANCE MANUAL DISTORTION ANALYZER HEWLETT-PACKARD MODELS 333A AND 334A HEADQUARTERS, DEPARTMENT OF THE ARMY MAY 1967 TM 11-6625-1576-15 WARNING DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT Be careful when working on the power supply and on the 115-volt ac line connections. DO NOT TAKE CHANCES ! This manual contains copyrighted material originally prcpared by the Hewlett-Packard Co. TM11-6625-1576-15 TECHNICAL MANUAL ) ) NO. 11-6625-1576-5 ) HEADQUARTERS DEPARTMENT OF THE ARMY Washington, D.C., 1 9 M a y 1 9 6 7 Organizational, DS, GS, and Depot Maintenance DISTORTION ANALYZER, HEWLETT-PACKARD MODELS 333A AND 334A Section I Page GENERAL INFORMATION . . . . . . . . . 1-2.1 1-A.1 Scope . . . . . . . . . . . . . . . . .1-2.1 l-A.2 Index of Publications. . . 1 - 2 . 1 l-A.3 Forms and Records . . . . . . . . . . . 1 - 2 . 1 l-1. Description . . . . . . . .1-3 1-6. Accessory Features . . . . . . . .1-3 1-8. Options Available . . . . . . . . .1-3 1-11. Modifications . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Page Section INSTALLATION . . . . . . . . . . . . . .2-1 II 2-1. Introduction . . . . . . . . . . . . . .2-1 2-3. Inspection . . . . . . . . . . . . . . 2-1 2-5. Power Requirements . . . . . . . . . . 2-1 2-7. Three-Conductor Power Cable . . . 2-1 2-10. Installation . . . . . . . . . . . . . . 2-1 2-12. Bench Installation . . . . . . . . . 2-1 2-14. Rack Installation . . . . . . . . . . 2-1 2-16. Repackaging for Shipment . . . . . . 2-1 Page Section OPERATING INSTRUCTIONS . . . . . . . 3-1 III 3-1. Introduction . . . . . . . . . . . . . 3-1 3-4. Controls and Indicators . . . . . . . 3-1 3-6. Adjustment of Mechanical Zero . . . 3-1 3-8. General Operating Information . . . 3-1 Input Connections . . . . . . . . . 3-1 3-9. 3-11. Voltmeter Characteristics . . . . . 3-1 3-14. Use of Output Terminals . . . . . . 3-1 3-16. Operating Procedures . . . . . . . . 3-2 3-18. Distortion Measurement . . . . . . 3-2 Page Section IV THEORY OF OPERATION . . . . . . . . . . 4-1 4-1. Overall Description . . . . . . . . 4-1 4-3. Block Diagram Description . . . . . 4-1 4-4. Distortion Measuring Operation . . 4-1 4-6. Distortion Measurement in AM . Carriers . . . . . . . . . . . . . 4-1 4-8. Voltmeter Operation . . . . . . . . 4-1 4-10. Schematic Theory . . . . . . . . . . 4-1 4-11. Impedance Converter Circuit . . . 4-1 4-14. Rejection Amplifier Circuit . . . . 4-2 4-36. High Pass Filter . . . . . . . . . . . 4-5 4-38. Meter Circuit . . . . . . . . . . . . 4-5 4-46. Power Supply Circuit . . . . . . . . . . 4-7 4-51. RF Detector Circuit (334A only) . l 4-7 Section Page V MAINTENANCE. . . . . . . . . . . . . 5-1 5-l. Introduction. . . . . . . . . . . 5-1 5-2. Test Equipment Required . . . . . 5-1 5-5. Performance Checks. . . . . . . . . 5-1 Section V (Cont `d) 5-9. Fundamental Rejection Check . . 5-10. Second Harmonic Accuracy Check 5-11. Distortion Introduced b