This manual contains copyrighted material originally
prcpared by the Hewlett-Packard Co.
TM11-6625-1576-15
TECHNICAL MANUAL
)
HEADQUARTERS
)
DEPARTMENT OF THE ARMY
NO. 11-6625-1576-5 )
Washington, D.C., 19
May 1967
Organizational, DS, GS, and Depot Maintenance
DISTORTION ANALYZER, HEWLETT-PACKARD MODELS 333A AND 334A
Section
Page
I 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
Section
Page
II
INSTALLATION . . . . . . . . . . . . . .2-1
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
Section
Page
III
OPERATING INSTRUCTIONS . . . . . . . 3-1
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
3-9.
Input Connections . . . . . . . . . 3-1
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
Section
Page
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 by Instru-
ment Check and Automatic
Control Loop Operation . . . .
5-12. Frequency Calibration Accuracy
Check . . . . . . . . . . . .
5-13. Input Resistance Check . . . . . .
5-14. Input Shunt Capacitance Check . .
5-15. Minimum Input Level Check . . .
5-16. DC Isolation Check . . . . . . . .
5-17. Voltmeter Accuracy Check . . . .
5-18. High Pass Filter Check . . . . . .
5-19. Voltmeter Frequency Response
Check . . . . . . . . . . . . . . . .
5-20. Residual Noise Check . . . . . . .
5-21. AM Detector Check (Model 334A
only) . . . . . . . . . . . . . . .
5-22. Adjustment and Calibration
Procedure. . . . . . . . . . . . . . .
5-25. Meter Mechanical Zero Set . . . .
5-27. Power Supply and Bias
Adjustments. . . . . . . . . . .
5-28. A3R16 and A3R30 Distortion
Adjust. . . . . . . . . . . . . .
5-29. Bridge Balance Adjustment (C3) .
5-30. Voltmeter Gain Adjustments . . .
5-31. Voltmeter Frequency Response
Adjustment . . . . . . . . . . .
5-32. Sensitivity Switch Calibration . . .
5-33. Troubleshooting Procedures . . . .
5-39. Bottom Shield Removal . . . . . .
5-41. Servicing Etched Circuit Boards .
5-44.
Servicing Rotary Switches . . . .
Page
5-1
5-2
5-2
5-3
5-4
5-4
5-4
5-4
5-5
5-5
5-6
5-6
5-6
5-7
5-7
5-7
5-9
5-9
5-10
5-10
5-10
5-11
5-11
5-11
5-13
Section
VI
SCHEMATIC DIAGRAMS
6-1. Schematic Diagrams
Page
6-1
6-1
iii
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