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SECTION III. OPERATING INSTRUCTIONS (Cont.). Para Page
Crosstalk measurements...................................................................................................3-53 3-10
Identifying noise characteristics.........................................................................................3-57 3-10
Measurements in DBC ......................................................................................................3-64 3-11
Measurement procedures..................................................................................................3-67 3-12
150 BAL conversion..........................................................................................................3-69 3-12
IV. THEORY OF OPERATION
Introduction.......................................................................................................................4-1 4-1
Block diagram description.................................................................................................4-7 4-1
Detailed circuit description.................................................................................................4-16 4-2
Range attenuator A2 .........................................................................................................4-18 4-3
Input amplifier A3..............................................................................................................4-20 4-3
Filters................................................................................................................................4-25 4-4
Meter amplifier..................................................................................................................4-30 4-7
Detector............................................................................................................................4-32 4-7
Power supply and series regulator.....................................................................................4-37 4-8
V. MAINTENANCE
Introduction.......................................................................................................................5-1 5-1
Factory selected values.....................................................................................................5-4 5-1
150 BAL conversion..........................................................................................................5-6 5-1
Performance Checks.........................................................................................................5-7 5-2
Adjustment and calibration procedure................................................................................5-14 5-8
Assembly removal.............................................................................................................5-25 5-10
Troubleshooting procedures..............................................................................................5-27 5-10
Factory selected values.....................................................................................................5-39 5-15
VI. REPLACEABLE PARTS
Introduction.......................................................................................................................6-1 6-1
Ordering information.........................................................................................................6-4 6-1
VII. CIRCUIT DIAGRAMS
Introduction.......................................................................................................................7-1 7-1
Functional block diagrams.................................................................................................7-3 7-1
Schematic diagrams .........................................................................................................7-5 7-1
APPENDIX A. REFERENCES.................................................................................................................. A-1
APPENDIX B. MAINTENANCE ALLOCATION
SECTION I. Introduction....................................................................................................................... B-1
Il. Maintenance allocation chart for Meter, Audio Level TA-885/U........................................... B-3
III. Tool and test equipment requirements for Meter, Audio Level TA-883/U ............................ B-4
IV. Remarks (Not applicable)
APPENDIX C. MANUAL BACKDATING CHANGES.................................................................................. C-1
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