Miteq D-9301, Руководство по эксплуатации и обслуживанию, Страница: 6 / 86

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TABLE OF CONTENTS (Cont.)
SECTION 4
PRINCIPLES OF OPERATION
4.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . 4-1
4.2 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . 4-1
4.3 SUBSYSTEMS AND COMPONENTS FUNCTIONAL DESCRIPTION . 4-5
4.3.1 SIGNAL PATH . . . . . . . . . . . . . . . . 4-5
4.3.1.1 Input Filter, Isolators
(A2A1, A2A2, A2A3) . . . . . . . . . .
4-5
4.3.1.2 Mixer, First Conversion (A2A4) . . . . . 4-6
4.3.1.3 Amplifier, Isolator, Filter
(A2A5 to A2A7) . . . . . . . . . . . . 4-7
4.3.1.4 Downconverter Module (A2A8) . . . . . . 4-9
4.3.2 LOCAL OSCILLATOR . . . . . . . . . . . . . . 4-10
4.3.2.1 5 MHz Reference (A3A1) . . . . . . . . . 4-10
4.3.2.2 Frequency Synthesizer (A3A2) . . . . . . 4-11
4.3.2.3 1170 MHz Phase Locked Source (A3A6) . . 4-12
4.3.3 CONVERTER CONTROLLER . . . . . . . . . . . . 4-14
4.3.4 POWER SUPPLY, LOW PASS FILTER . . . . . . . 4-15
SECTION 5
MAINTENANCE
5.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . 5-1
5.2 PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . 5-1
5.2.1 DC VOLTAGE . . . . . . . . . . . . . . . . . 5-1
5.2.2 GAIN OF THE CONVERTER . . . . . . . . . . . 5-3
5.2.3 FREQUENCY MEASUREMENT . . . . . . . . . . . 5-3
5.2.4 LOCAL OSCILLATOR PHASE LOCK TEST POINT
(PHASE VOLTAGE) . . . . . . . . . . . . . 5-3
5.3 CORRECTIVE MAINTENANCE . . . . . . . . . . . . . . 5-4
5.3.1 POWER SUPPLY MALFUNCTION . . . . . . . . . . 5-4
5.3.2 LOCAL OSCILLATOR . . . . . . . . . . . . . . 5-4
5.3.3 CONVERTER, SIGNAL CHAIN . . . . . . . . . . 5-4