Electro-Metrics EM-2115 Manuale utente

INSTRUCTION MANUAL

INTERFERENCE

ANALYZER

MODEL EM-2115

(EMC-30)

INSTRUCTION MANUAL

THIS INSTRUCTION MANUAL AND ITS

ASSOCIATED INFORMATION IS PRO-

PRIETARY. UNAUTHORIZED REPRO-

DUCTION IS FORBIDDEN.



2002 ELECTRO-METRICS CORP.

INTERFERENCE ANALYZER

ELECTRO-METRICS

MODEL EM-2115

(EMC-30)

SERIAL NO: N/A

ELECTRO-METRICS CORPORATION

231 Enterprise Road, Johnstown, New York 12095

Phone: (518) 762-2600 Fax: (518) 762-2812

EMAIL: [email protected] WEB: http://www.electro-metrics.com

MANUAL REV. NO: EM2115-0102 ISSUE DATE: JANUAERY 01 2002

WARRANTY

This Model EM-2115 Interference Analyzer is warranted for a pe-

riod of 12 months (USA only) from date of shipment against defec-

tive materials and workmanship. This warranty is limited to the

repair of or replacement of defective parts and is void if unauthor-

ized repair or modification is attempted. Repairs for damage due to

misuse or abnormal operating conditions will be performed at the

factory and will be billed at our commercial hourly rates. Our esti-

mate will be provided before the work is started.

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

)

TABLE OF CONTENTS

SECTION TITLE PAGE

0.1 Installation 0-1

0.1.1 Benchtop Operation 0-1

0.1.2 Rack Mounting 0-1

I Introduction And Specifications S1-1

1.1 Introduction S1-1

1.2 Receiver Specifications S1-2

II Operating Instructions S2-1

2.1 Operational Precautions S2-1

2.1.1 Power Source Selector S2-1

2.1.2 Tuning Mode Selection Switch S2-1

2.1.3 Input Signal Limits S2-1

2.2 Power Supply S2-2

2.2.1 Power Requirements S2-2

2.2.2 Power Source Selector S2-2

2.2.3 Fuse Specifications S2-3

2.2.4 Optional EM-2126 Battery/Charger Module S2-3

2.3 Operating Procedures S2-3

2.3.1 Initial Power Up Procedure S2-3

2.3.2 Pre-Operational Calibration S2-4

2.3.2.1 CW Calibration S2-4

2.3.3 Pre-Operational Check S2-4

2.4 Local Mode Of Operation S2-6

2.4.1 Amplitude And Frequency Measurement S2-6

2.4.2 Amplitude Accuracy Correction Factor S2-6

2.4.3 Input Attenuation Selection S2-8

2.4.3.1 Input Attenuation Selection Criteria S2-8

2.4.4 IF Bandwidth Selection S2-8

2.4.4.1 Bandwidth Selection Criteria S2-9

2.4.5 Signal Measurements S2-10

2.4.6 Detector Mode Selection S2-11

2.4.6.1 Peak Detector S2-12

2.4.6.2 Quasi-Peak Detector S2-14

2.4.6.2.1 Quasi-Peak Measurement Technique S2-15

2.4.6.3 RMS Detector S2-16

2.4.6.3.1 RMS Measurement Technique S2-17

2.4.6.3.2 RMS Value Of Radiation Field S2-17

2.4.6.4 Average Detector S2-18

2.4.6.4.1 Average Measurement Technique S2-18

2.4.6.5 Slideback Detector S2-18

2.4.6.5.1 Slideback Detector Aural (Audio)

Measurement Technique S2-19

2.4.7 Broadband/Narrowband Determination S2-20

2.5 Computer Operation S2-21

2.5.1 Equipment Setup S2-21

2.5.2 Bus Address S2-22

2.5.3 Remote Mode Of Operation S2-22

2.5.4 Local/Local Lockout Commands S2-23

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

)

TABLE OF CONTENTS

SECTION TITLE PAGE

2.5.5 EM-2115 Device Dependent Commands S2-23

2.5.6 Frequency Tuning S2-25

2.5.7 Amplitude And Frequency Read S2-25

2.5.8 Computer Software Available for EM-2115 S2-26

2.6 External X-Y Recorder Operation S2-26

2.6.1 EM-2115/X-Y Recorder Calibration S2-26

2.6.2 EM-2115/X-Y Recorder Operation S2-27

2.7 External Oscilloscope Operation S2-29

2.7.1 EM-2115 Oscilloscope Output Connectors S2-29

2.7.2 EM-2115/Oscilloscope Operation S2-30

III Performance Check S3-1

3.1 Introduction S3-1

3.2 When To Use Test Procedures S3-1

3.3 Preliminary S3-1

3.3.1 Precautions S3-1

3.3.2 Control Settings S3-2

3.3.3 Frequency Check Points S3-2

3.3.4 Signal Amplitude And Frequency Accuracy S3-3

3.4 Performance Test Procedures S3-3

3.4.1 CW Voltage Accuracy S3-3

3.4.2 Broadband Voltage Accuracy S3-4

3.4.3 Frequency Accuracy S3-5

3.4.4 Attenuator Accuracy S3-6

3.4.5 CW Sensitivity S3-7

3.4.6 Impulse Sensitivity S3-8

3.4.7 Bandwidth (3 dB) S3-9

3.4.8 Image Rejection S3-10

3.4.9 IF Rejection S3-12

3.4.10 Spurious Response S3-12

IV Service, Maintenance, And Calibration S4-1

4.1 Precautions S4-1

4.2 Instrument Access/Disassembly/Assembly S4-2

4.2.1 Top/Bottom Cover Removal S4-2

4.2.1.1 Top Cover Removal S4-2

4.2.1.2 Bottom Cover Removal S4-2

4.2.2 RF Tuner Assembly (A2) Removal S4-2

4.2.2.1 RF Tuner Top Cover Removal S4-3

4.2.3 Submodule Assembly Removal S4-4

4.2.3.1 Submoduel Assembly Disassembly/Assembly S4-5

4.2.4 Front Panel Assembly (A1) Removal S4-5

4.2.5 Prescaler Module (A12) Removal S4-6

4.2.6 Power Supply Assembly (A14) Removal S4-6

4.3 Preliminary S4-7

4.3.1 Work Conditions S4-7

4.3.2 Control Settings S4-7

4.4 Calibration/Alignment Procedures S4-8

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

iii

)

TABLE OF CONTENTS

SECTION TITLE PAGE

4.4.1 Power Supply Verification S4-8

4.4.1.1 Regulated DC Voltage Checks S4-8

4.4.1.2 Power Supply Board A14A1 Adjustments S4-9

4.4.2 Detection/Metering Circuitry Adjustment/Verification S4-10

4.4.2.1 Signal Amplitude Digital Meter Adjustment/Verification S4-10

4.4.2.2 Detector Board A8 Verification S4-11

4.4.3 Log Detector Module A4 Adjustment/Verification S4-12

4.4.4 Narrowband (0.1) Filter Module A6

Adjustment/Verification S4-15

4.4.5 IF Amplifier Module A3 Adjustment/Verification S4-16

4.4.5.1 IF Amplifier Bandwidth Check/Adjustment S4-17

4.4.5.2 IF Amplifier Gain Check/Adjustment S4-19

4.4.6 Preamplifier Board A2A16A2 Adjustment/Verification S4-20

4.4.7 Tune Control Bd (A10) Adjustment/Verification S4-22

4.4.8 Tuning Regulator Board A2A16A2

Adjustment/Verification S4-23

4.4.9 Sweep Board A11 Adjustment/Verification S4-25

4.4.10 Frequency Display and Prescaler Verification S4-26

4.4.11 RF Tuner A2 Adjustment/Verification S4-29

4.4.11.1 Local Oscillator Level Adjustment S4-30

4.4.11.2 Stator Board A2A16A1 Mixer Adjustment/Verification S4-30

4.4.11.3 RF Frequency Bands 1-9 (A2A1-A2A9)

Adjustment/Verification S4-31

4.4.11.4 Mixer Null RF Frequency Ranges 1-9 S4-34

4.4.11.5 RF Frequency Bands 10-15 (A2A10-A2A15) S4-35

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

)

APPENDICES

APPENDIX TITLE PAGE

4A Troubleshooting Microprocessor Assembly A1A3 4A-1

4A-1.0 Introduction 4A-1

4A-2.0 Failure Diagnosis 4A-1

4A-3.0 Troubleshooting Techniques 4A-1

A Description Front Panel Controls A-1

A-1.0 Control Function A-1

A-2.0 Attenuator A-1

A-2.1 Attenuation Switches A-1

A-2.2 Attenuation Indicator A-1

A-3.0 Frequency Control A-2

A-3.1 Main Tuning Control A-2

A-3.2 Fine Tune Control A-2

A-3.3 Frequency Display A-2

A-3.4 Range Selector Switches A-2

A-3.4.1 Frequency Range Indicator A-2

A-4.0 AFC Switch A-2

A-5.0 Sweep Function Controls A-3

A-5.1 Scan Mode Switch A-3

A-5.1.1 Scan Mode Indicator A-3

A-5.2 Start Switch A-3

A-5.3 Scan Width Control A-4

A-5.4 Scan Rate Control A-4

A-5.5. Marker Switch A-5

A-6.0 Bandwidth Switch A-5

A-6.1 Bandwidth Indicator A-6

A-7.0 Detection Switch A-6

A-7.1 Detector Indicators A-7

A-8.0 Amplitude Indication A-7

A-8.1 Digital Meter A-8

A-8.2 Analog Meter A-8

A-9.0 Calibration Function A-8

A-9.1 CAL Switch A-8

A-10.0 Audio Function A-8

A-10.1 Audio Switch A-9

A-10.1.1 Audio Indicators A-9

A-10.2 Audio Volume Control A-9

A-11.0 Local Switch A-9

A-11.1 Remote Indicators A-10

A-12.0 Power Switch A-10

B Description Front/Rear Panel Connectors B-1

B-1.0 Description Front Panel Connectors B-1

B-1.1 Input Connector A1J1 B-1

B-1.2 Audio Output A1J2 B-1

B-2.0 Rear Panel Connectors B-1

B-2.1 PRE-IF Connector A13J10 B-1

B-2.2 POST IF Connector A13J10 B-1

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

)

APPENDICES

APPENDIX TITLE PAGE

B-2.3 EM-2115 To Oscilloscope Connectors B-1

B-2.4 AM Video Connector A13J5 B-2

B-2.5 FM Video Connectors A13J6 B-2

B-2.6 X-Y Plotter Connector A13J3 B-2

B-2.8 Antenna Connector A13J1 B-2

B-2.7 GPIB Connector A13J4 B-2

B-2.9 Power Connector (A14J2 B-2

B-2.10 Battery Input Connector A14J3 B-3

C Function And Description C-1

C-1.0 Introduction C-1

C-2.0 Synopsis Of Receiver Operation C-1

C-3.0 Circuit Description C-2

C-4.0 A2 RF Tuner Module C-2

C-4.1 A2A16A6 RF Input Attenuator C-2

C-4.2 A2A16A5 IG Calibrator Assembly C-2

C-4.3 A2A16A1 Stator Board Assembly C-3

C-4.4 A2A1-A2A15 RF Frequency Range Bands C-3

C-4.5 A2A16A2 Preamplifier/Tuning Regulator Board C-4

C-4.6 A2A16A4 LO Amplifier Module C-5

C-5.0 A3 IF Amplifier Module C-5

C-6.0 A6 (0.1) Narrowband Filter Module C-7

C-7.0 A4 Log Detector Module C-7

C-8.0 A8 Detector Board C-8

C-9.0 A5 Discriminator Module C-9

C-10.0 A10 Tune Control Board C-10

C-11.0 A11 Sweep Board C-10

C-12.0 A9 Audio Amplifier Board C-11

C-13.0 A12 Prescaler Module C-12

C-14.0 A1A2 Front Panel Board C-12

C-15.0 A1A3 Microprocessor Board C-12

C-16.0 A16 Interface Board C-13

C-17.0 A15 Power Supply Filter Assembly C-14

C-18.0 A14 Power Supply C-14

D Broadband Conversion Factors D-1

E EM-2115 Accessory Items E-1

E-0.1 Standard Accessory Items E-1

E-1.0 Optional Accessory Items E-1

E-2.0 Antennas E-1

E-2.1 EM-6875 Remote Loop Antenna E-1

E-2.2 EM-6912A Biconical Antenna E-2

E-2.3 EM-6940 Log Conical Antenna E-6

E-2.4 EM-6950 Log Periodic Antenna E-7

E-2.5 EM-6960 Double Ridged Guide Antenna E-10

E-2.6 Em-6892 Remote Active Antenna E-11

E-2.7 EM-6893 Remote Vertical Antenna E-13

E-2.8 EM-6924 Tunable Dipole Antenna Set E-16

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

)

APPENDICES

APPENDIX TITLE PAGE

E-3.0 Probes E-18

E-3.1 EM-6981 Current Probe E-18

E-3.2 EM-6880/EM-6881/EM-6882 Magnetic Field Probes E-20

E-3.3 EM-6983 Line Probe E-22

E-3.4 Electrostatic Field Probe E-23

E-3.5 EM-6992 Near Field Probe Set E-23

E-4.0 Filters E-24

E-4.1 High/Low Pass Filters E-24

E-4.2 Tunable Rejection Filters E-25

E-5.0 Line Impedance Stabilization Networks E-25

E-5.1 LISNs Available For Use With EM-2115 E-25

E-6.0 CIG-25 E-26

E-7.0 EM-2116 Battery Pack/Charger E-27

E-8.0 EM-4206 Broadband Preamplifier E-28

E-9.0 EM-4205 Broadband Power Amplifier E-30

E-10.0 Additional Optional Accessory Items E-31

F Recommended Test Equipment F-1

G EM-2115 Replaceable Components G-1

G-1.0 Introduction G-1

G-2.0 Replaceable Assemblies G-1

G-3.0 EM-2115 Parts List G-2

G-3.1 Resistor Part Number Codes G-2

H Schematic Diagrams H-1

ELECTRO-METRICS EM-2115 TABLE OF CONTENTS

(EM2115-0.1-

vii

)

LIST OF TABLES

TABLE TITLE PAGE

1.1 EM-2115 Specifications S1-3

2.1 Typical Broadband Correction Factors Vs Bandwidth S2-11

2.2 Sample Time Control Settings Vs Dump Rate S2-13

2.3 CISPR Conversion Factors S2-15

2.4 IF Bandwidth Vs Frequency Difference For

Broadband/Narrowband Determination S2-21

2.5 Device Dependent Command Summary S2-23

4.1 Log Detector Signal Input Level Vs DC Output Voltage S4-14

4.2 Single Mode Sweep Times S4-26

4.3 ContinuousMode Sweep Times S4-26

4.4 Frequency Display Preset/LO Input Data S4-28

4.5 Microprocessor Board A1A3-J5 (Divide By 100)

Frequency Display Preset/LO Input Data S4-29

4.6 RF Frequency Ranges 1-9 Adjustments S4-33

4A.1 µP Common Failures: Symptoms VS Causes 4A-2

4A.2 µP Address Map 4A-5

4A.3 PIA Table Listing EM-2115 4A-6

G.1 Replaceable Assemblies G-1

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