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Electro-Metrics EMC-11 Analyzer
Hersteller:
Modell:
EMC-11
Datum:
1985
Kategorie:
Gruppe:
Beschreibung:
Interference Analyzer

Informationen

EMC-11 INTERFERENCE Analyzer The EMC-11 Interference Analyzer is designed to perform emission and susceptibility testing to MIL-STD-461A/B, -462, -285 plus other applicable military, government, and commercial — both domestic and international — standards from 20 Hz to 50 kHz. The receiver incorporates a differential front end with a Twinax connector to eliminate ground loop problems and permit balanced or floating measurements. In addition, the receiver has four selectable input impedances, nine selectable detection bandwidths plus two selectable low pass and four selectable high pass input filter networks. A voltage controlled Oscillator is used for tuning the receiver with the tuned frequency indicated by a liquid crystal display. A dual metering system, with digital and analog output meters, is used to indicate the input signal level. The digital meter (liquid crystal display) circuitry automatically adds the total receiver attenuation to the meter indication. In addition, there is a provision for displaying the actual attenuation level on the same meter when required. Meter functions include AVERAGE (CARRIER), RMS, PEAK, QUASI-PEAK, and SLIDEBACK PEAK. The receiver is amplitude calibrated using an automatic calibration circuit which eliminates the requirement for a manual IF/RF gain control function. Five OUTPUT functions, available at the front panel OUTPUT connector and selected by the OUTPUT FUNCTION Switch, are BFO, RESTORED, LINEAR VIDEO, IF, and TRACK. Rear panel connectors are provided for the X-Y plotter outputs, REMOTE CONTROL inputs/outputs plus the horizontal and vertical outputs for CRT presentations. The majority of the receiver functions can be remotely controlled using either a programmer or computer/calculator system. An IEEE Interface Bus option is also available on special request.

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Bedienungsanleitung
Dokumenttyp:
Bedienungsanleitung
Seitenanzahl:
76
Dateigröße:
4.18 Mbytes (4380123 Bytes)
Sprache:
english
Revision:
Dokument-ID:
843-2600
Datum:
01 August 1985
Qualität:
Gescanntes Dokument, alles ist lesbar.
Upload Datum:
16 August 2017
MD5:
85d7a4124206aebaf8b397a2d4f2fa36
Downloads:
281

Informationen

I INTRODUCTION AND SPECIFICATIONS ... 1-1 1.1 Introduction ... 1-1 1.2 EMC-11 Interference Analyzer ... 1-1 1.3 Unpacking ... 1-1 1.4 Electronic Shipping Damage ... 1-1 1.5 Installation ... 1-1 1.6 Receiver Specifications ... 1-2 1.7 Mechanical Construction ... 1-2 1.8 References ... 1-2 II OPERATING INSTRUCTIONS ... 2-1 2.1 General ... * ... 2-1 2.2 Operational Precautions ... 2-1 2.2.1 Power Source Selector ... 2-1 2.2.2 Tuning Mode Switch ... 2-1 2.2.3 Input Voltage ... 2-1 2.3 Control Functions ... 2-1 2.3.1 Filter Switches ... * ... 2-1 2.3.11 Low Pass Filter Switch ... 2-1 2.3.1.2 High Pass Filter Switch ., ... — ... 2-1 2.3.2 Impedance Switch ... 2-1 2.3.3 Frequency Control ... 2-1 2.3.3.1 Tuning Control ... 2-1 2.3.3.2 Fine Tune Control ... 2-1 2.3.3.3 Frequency Display ... ... ... 2-1 2.3.3.4 Frequency Scale Selector Switch ... 2-4 2.3.3.5 Tuning Mode Switch ... 2-4 2.3.3.5 AFC Switch ... 2-4 2.3.4 Sweep Function Controls ... 2-4 2.3.4.1 Sweep Width/Rate Control ... 2-4 2.3.4.2 Sweep Start Switch ... 2-4 2.3.5 Bandwidth Switch ... 2-4 2.3.6 Detection Switch ... 2-4 2.3.6.1 Average (Carrier) ... 2-4 2.3.6.2 RMS ... 2-4 2.3.63 PEAK ... 2-4 2.3.6.4 QUASI-PEAK ... 2-4 2.3.6.5 SUDEBACK ... 2-5 2.3.6.5.1 Threshold Control ... 2-5 2.3.7 Amplitude Indication ... 2-5 2.3.7.1 Digital Meter ... 2-5 2.3.7.2 Analog Meter ... 2-5 2.3.8 Attenuation Circuit ... 2-5 2.3.8.1 Attenuation Switches ... 2-5 2.3.8.2 Attenuation Display Switch ... 2-5 2.3.9 Calibration Function ... 2-5 2.3.9.1 Cal Switch ... 2-5 2.3.10 Output Function Switch ... 2-5 2.3.10.1 IF ... 2-5 2.3.10.2 BFO ... 2-5 2.3.10.3 RESTORED ... 2-6 2.3.10.4 TRACK ... 2-6 2.3.10.5 LINEAR VIDEO ... 2-6 2.3.10.6 Output Level Control ... 2-6 2.3.11 Audio Function ... 2-6 2.3.11.1 Audio Volume Control ... 2-6 2.3.12 Power Switch ... 2-6 2.3.13 Battery Indicator ... 2-6 2.3.13.1 Battery Test Switch ... 2-6 2.3.13.2 Charge Indicator ... 2-6 2.4 Front Panel Connectors ... 2-6 2.4.1 Input Connector ... 2-6 2.4.2 Probe Connector ... 2-6 2.4.3 Output Connector ... 2-6 2.4.4 Audio Output ... 2-6 2.5 Rear Panel Connectors ... * ... 2-6 2.5.1 Scope Connectors ... 2-6 2.5.2 X-Y Plotter Connector ... 2-6 2.5.3 Remote Connector ... 2-6 2.5.4 AC Power Connector ... 2-6 2.5.5 External DC Input Connector ... 2-6 2.6 Power Supply ... 2-6 2.6.1 Power Requirements ... 2-6 2.6.2 Power Source Selector ... 2-6 2.6.3 Fuse Specifications ... 2-7 2.6.4 Battery Operation (Optional) ... 2-7 2.6.5 Battery Power Supply ... 2-7 2.6.6 Charging the Battery ... 2-7 2.6.7 Battery Protection Circuits ... 2-7 2.6.7.1 Overcharging ... 2-7 2.6.7.2 Excessive Discharge ... 2-10 2.6.8 External PC Operation ... 2-10 2.7 Remote Operation ... 2-10 2.8 Operating Procedures ... 2-10 2.8.1 Initial Power Up Procedure.. ... 2-10 2.8.2 CW Calibration ... 2-10 2.8.2.1 Calibration Accuracy ... 2-11 2.8.3 Signal Measurements ... 2-11 2.8.3.1 Conducted Signal Measurement Considerations ... 2-11 2.8.3.2 Electric Field Strength Measurement ... 2-12 2.8.3.2.1 PEF-10A Operational Use ... 2-13 2.8.3.2.2 PEF-10A Calibration Procedure ... 2-13 2.8.3.2.3 Calibration Signal Level Check ... 2-14 2.8.3.3 Overload and Noise Indications ... 2-14 2.8.4 Tuning the EMC-11 ... 2-14 2.8.4.1 Signal Amplitude Measurement ... 2-14 2.B.4.2 Signal Frequency Measurement ... 2-14 2.8.4.3 Tuning A Specific Frequency ... 2-15 2.8.5 EMC-11/X-Y Recorder Operation ... 2-15 2.8.5.1 General ... 2-15 2.8.5.2 EMC-11/X-Y Recorder Calibration ... 2-15 2.8.5.3 EMC-11/X-Y Recorder Operation ... 2-15 2.8.6 EMC-11/Oscilloscope Operation ... 2-16 2.8.6.1 General ... 2-16 2.8.6.2 Operation ... 2-16 III PERFORMANCE CHECK ... 3-1 3.1 General ... 3-1 3.2 When To Use Test Procedures ... 3-1 3.3 Preliminary ... 3-1 3.3.1 Precautions ... 3-1 3.3.2 Control Settings ... 3-2 3.3.3 Frequency Check Points ... 3-2 3.3.4 Signal Amplitude and Frequency Accuracy ... 3-2 3.4 Performance Test Procedures ... 3-2 3.4.1 CW Voltage Accuracy ... 3-2 3.4.2 Frequency Accuracy ... 3-2 3.4.3 Attenuation Accuracy ... 3-3 3.4.4 CW Sensitivity ... * ... 3-3 3.4.5 Input Filter Check ... 3-4 3.4.5.1 Low Pass Filter Check ... 3-4 3.4.Ö.2 High Pass Filter Check ... 3-4 3.4.6 Bandwidth (6 dB) ... 3-4 3.4.7 IF Rejection ... 3-5 3.4.8 Output Function Check ... 3-5 3.4.9 Spurious Response ... 3-6 3.4.10 Sweep Function Check ... 3-6 IV SERVICE, MAINTENANCE, AND CALIBRATION ... 4-1 4.1 General ... 4-1 4.2 Maintenance/Calibration/Repair ... 4-1 4.2.1 Maintenance ... 4-1 4.2.2 Calibration ... 4-1 4.2.3 Repair ... 4-1 4.2.4 Test Equipment Required ... 4-1 4.3 Precautions ... 4-1 4.4 Troubleshooting ... 4-1 4.4.1 Troubleshooting Procedure ... 4-1 4.4.2 Other Considerations ... 4-1 4.4.2.1 Control Settings ... 4-1 4.4.2.2 Operational Errors ... 4-2 4.4.2.3 Test Equipment Accuracy ... 4-2 4.4.2.4 Battery Test (Optional) ... 4-3 4.4.2.5 Remote Connector Voltages ... 4-3 4.5 Repair Procedures ... 4-3 4.5.1 Method ... 4-3' 4.5.2 Printed Circuit Board Precautions ... 4-3 4.6 Instrument Access/Disassembly/Assembty ... 4-3 4.6.1 Top/Bottom Cover Removal ... 4-3 4.6.1.1 Top Cover Removal ... 4-3 4.6.1.2 Bottom Cover Removal ... 4-3 4.6.2 Card Rack Assembly Cover Removal ... 4-4 4.6.3 Battery (A7) Removal ... 4*4 4.6.4 Power Supply Module (A4) Removal ... 4-4 4.6.5 Front Panel Assembly (A1) ... 4-4 4.7 Calibration/Alignment Procedures ... 4-4 4.7.1 General ... 4-4 4.7.2 Control Settings ... 4-4 4.7.3 Preliminary Precautions ... 4-4 4.7.4 Power Supply Verification ... 4-4 4.7.4.1 Regulated DC Voltage Checks ... 4-5 4.7.4.2 Power Supply Board A4A1 Adjustments ... 4-5 4.7.4.3 Battery Charger Adjustment ... 4-5 4.7.5 Sweep Circuitry Adjustment/Verification ... 4-6 4.7.5.1 Manual Tune Function Adjustment/Verification ... 4-6 4.7.5.2 Plotter Function Adjustment/Verification ... 4-6 4J.5.3 CRT Function Adjustment/Verification ... 4-6 4.7.6 Frequency Display Module Verification/Adjustment ... 4-7 4.7.7 VCO Adjustment/Verification ... 4-7 4.7.8 Preamplifier/Attenuator Adjustment/Verification ... 4-7 4.7.9 IF Amplifier Adjustment/Verification ... 4-7 4.7.9.1 IF #1 Board A2A5 Adjustment/Verification ... 4-8 V 4.7.9.2 IF #2 Board A2A6 Adjustment/Verification ... 4-8 4.7.9.3 IF #3 Board A2A7 AdjustmentA/erification ... 4-9 4.7.10 Detector Board A2A9 Adjustment/Verification ... 4-10 v 4.7.11 Log Circuitry Adjustment/Verification ... 4-11 4.7.12 Cal/Tracking A2A15 Adjustment/Verification ... 4-12 4.7.13 Cal Circuit Board A2A8 Adjustment/Verification ... 4-13 4.7.14 AFC Circuitry Adjustment/Verification ... 4-13 V THEORY OF OPERATION ... 5-1 5.1 General ... 5-1 5.2 EMC-11 Design Criteria ... 5-1 5.3 Synopsis Of Receiver Operation ... 5-1 5.4 Circuit Description ... 5-3 5.4.1 Card Rack Assembly A2 ... 5-3 5.4.1.1 A2A1 Input Switching Board ... 5-3 5.4.1.2 A2A2 Low Pass Filter Board ... 5-3 5.4.1.3 A2A3 High Pass Filter Board ... 5-3 5.4.1.4 A2A4 Preamplifier/Attenuator Board ... 5-3 5.4.1.5 IF Amplifier Boards: A2A5 IF #1, A2A6 IF #2, A2A7 IF #3 ... 5-4 5.4.1.5.1 A2A5 IF #1 Board ... 5-4 5.4.1.5.2 A2A6 IF #2 Board ... 5-4 5.4.1.5.3 A2A7 IF #3 Board ... 5-4 5.4.1.6 A2A8 Calibration Circuit Board ... 5-4 5.4.1.7 A2A9 Detector Board ... 5-5 5.4.1.8 Log Amplifier Circuit ... 5-5 5.4.1.9 A2A10 Voltage Controlled Oscillator (VCO) Board ... 5-5 5.4.1.10 A2A11 Switching Logic Board ... 5-5 5.4.1.11 A2A12 Sweep Board ... 5-5 5.4.1.12 A2A13 Sweep Control Board ... 5-6 5.4.1.13 A2A14 Audio Amplifier Board ... 5-6 5.4.1.14 A2A15 Cal/Tracking Board ... 5-6 5.4.2 A1A2 Frequency Display Module ... 5-7 5.4.3 A1A3 Digital Voltmeter Module ... 5-7 5.4.4 A4 Power Supply Module ... 5-7 VI ACCESSORY DATA ... 6-1 6.1 Introduction ... 6-1 6.2 EMC-11 Standard Accessory Items ... 6-1 6.3 EMC-11 Optional Accessory Items ... .6-1 VII REPLACEABLE COMPONENTS ... 7-1 7.1 General ... 7-1 7.2 Replaceable Assemblies ... .7-1 7.3 Replaceable Parts ... 7-1 VIII REFERENCE DATA ... 8-1 8.1 General ... 8-1

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