HP TM 11-6625-2779-14&P manual List of Illustrations, List of Tables, Iii

Page 4

Model 3555B

 

 

Table of Contents

 

 

LIST OF ILLUSTRATIONS

 

 

Number

Page

Number

 

Page

1-1.Model 3555B Transmission and

 

 

 

 

 

 

Noise Measuring Set

1-1

4-7.

Simplified Peak Detection

4-7

2-1.

Power Plugs

2-1

5-1.

Balanced BNC to 310 Plug

5-2

3-1.Front Panel Controls, Indicators,

 

5-2.

Level Accuracy Check

5-2

 

and Connectors

3-2

5-3.

+20dBm and +30dBm Level

 

 

3-2.Side Panel Controls and Connectors

3-4

 

Accuracy Check

5-4

3-3.Impedance Matching 3555B to Recorder

...... 3-8

5-4.

Return Loss Test Set-Up

5-5

3-4.

Recorder Compatibility Chart

3-9

5-5.

Filter Response Test Set-Up

5-5

3-5.Simplified Send/Receive Test Set-Up

3-9

5-6.

Bridging Loss Test Set-Up

5-6

3-6.Typical Test Set-Up for Measuring

 

5-7.

Input Balance Test Set-Up

5-7

 

Insertion Loss

3-10

5-8.

Troubleshooting Tree

5-11

3-7.Test Set-Up for Measuring

 

7-1.

Functional Block Diagram

7-3/7-4

 

Crosstalk Coupling Loss

3-11

7-2.

A1 Function Assembly Schematic and

 

 

3-8.Simple Test for Inductive and

 

 

Component Location

7-5/7-6

 

Capacitive Coupling

3-12

7-3.

A2 Range Attenuator and A3 Input

 

 

4-1.

Simplified Block Diagram

4-1

 

Amplifier Schematic and Component

 

 

4-2.Simplified DIAL BAT Function

4-2

 

Location

7-7/7-8

4-3.

Simplified NG Function

4-3

7-4.

A4 Filter Schematic and Component

 

 

4-4.

Simplified Average Detection

4-4

 

Location

7-9/7-10

4-5.3kHz FLAT and PROGRAM

 

7-5.A3 Meter Amplifier, Detector and Series

 

 

 

Weighting Curves

4-5

 

Regulator Schematic and Component

 

 

4-6.C-MSG and 15kHz FLAT

 

 

Locations

7-11/7-12

 

Weighting Curves

4-6

 

 

 

 

 

 

LIST OF TABLES

 

 

 

Number

Page

Number

 

Page

1-1

Specifications

1-0

5-1

Required Test Equipment

5-1

1-2

Accessory Equipment Supplied

1-2

5-2

75 UNBAL Carrier Accuracy Check

5-3

2-1

Suitable Batteries Meeting

 

5-3Carrier 600 BAL and 135 BAL Level

 

 

 

NEDA 202 Specifications

2-1

 

Accuracy Check

5-3

3-1Front, Side and Rear Panel Controls,

 

5-4VF/Nm Level Accuracy Checks 600 BAL

 

 

 

Indicators and Connectors

3-3/3-5

 

and 900 BAL -80 dBm Through +30 dBm

..... 5-4

3-2

Crosstalk Correction Factor

3-10

5-5

Filter Response Checks

5-6

3-3

Level Measurement

3-13

5-6

Front Panel Trouble Analysis

5-12/5-13

3-4

Noise Metallic Measurements

3-13

5-7

Function Troubleshooting

5-14

3-5

Noise-to-Ground Measurements

3-14

5-8

FUNCTION Switch Resistance Values

5-15

3-6

Balance Measurement

3-14

5-9

Range Attenuation and Amplifier Gain

5-16

3-7

Recorder Calibration

3-14

5-10

Resistance Checks

5-16

3-8

Transmission Loss Measurement

3-14

5-11

Factory Selected Values

5-16

4-1Range Attenuation and Amplifier Gain

4-4

6-1

Replaceable Parts

6-2

 

 

 

6-2Part Number-National Stock Number

 

 

 

 

 

 

Cross Reference Index

6-10

iii

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Contents HEADQUARTERS, Department of the Army Reporting Errors and Recommending Improvements TM 11-6625-2779-14&PTechnical Manual Headquarters Department of the Army NSNReplaceable Parts List of Tables List of IllustrationsIii Section Introduction Maintenance Forms, Records, and ReportsScope Destruction of Army Electronics Materiel Administrative StorageReporting Equipment Improvement Recommendations EIR Items Comprising an Operable Equipment Specifications Voice Frequency Level Measurements 20Hz to 20kHzSection Section General Information IntroductionAccessory Equipment Supplied Accessory Equipment SuppliedInstrument Identification BAL ModificationSection Installation Inspection Warranty ExceptionPower Requirements BatteryInstallation and Removal of Battery Cover RemovalControls Connectors Indicators BatterySection Operating InstructionsFront Panel Controls, Indicators, and Connectors Front, Side and Rear Pane Side Panel Controls and Connectors Level and Noise Measurements Level MeasurementsPage Noise Measurement Recorder Compatibility ApplicationsRecorder Compatibility Chart Identifying Noise Characteristics Transmission Loss MeasurementsCrosstalk Measurements Crosstalk Correction FactorMeasurements in DBC Reinstall the set in its case 0dBmInput jacks are connected in parallel. If a 600 ohm 135 BALStep Procedure Level Measurement Noise Metallic MeasurementsNoise-to-Ground Measurements Balance Measurement Recorder CalibrationExample Transmission Loss MeasurementBlock Diagram Description Section Theory of Operation IntroductionDetailed Circuit Description Simplified Dial BAT FunctionInput Amplifier A3. Schematic No Range Attenuator A2Setting Attenuation FILTERS. Schematic NoRange Attenuator Pads UsedKHz Flat and Program Weighting Curves C-MSG and 1SkHz Flat Weighting Curves Meter AMPLIFIER. Schematic No DETECTOR. Schematic NoPower Supply and Series Regulator Schematic No Section Maintenance Introouction Instrument Recommended Type Required Characteristics ModelFactory Selected Values BAL ConversionPerformance Checks Level Accuracy ChecksFunction CARRIER, 75 Unbal TMS, TermUnbal Carrier Accuracy Check RangeFrequency 30Hz to 1MHz 100Hz to 600kHz 1MHz to 3MHzReturn Loss Check 20Hz to 20kHz 40Hz to 15kHz 100Hz to 20kHz 100Hz to 15kHzReturn Loss Test Set-Up Filter Response Checks Filter Response ChecksMSG dBm 3kHz Flat dBm 15kHz Flat dBm Program dBm Input Balance Bridging LossTMS Brdg Input TMS BrdgAdjustment and Calibration Procedure Power Supply CheckUnbal Calibration Attenuator CalibrationCommon Mode Adjustment Frequency Response AdjustmentBalance Check Troubleshooting Procedures Assembly RemovalFilter Calibration Troubleshooting Tree Front Panel Trouble Analysis Dial BATFront Panel Troubleshooting Function TroubleshootingRange Troubleshooting Front Panel Trouble Analysis ContdTroubleshooting Input Amplifier Filter TroubleshootingTroubleshooting the Meter Amplifier and Detector Defective FunctionFunction Switch Resistance Values Function Input Jacks DIAL/AC MON JacksTip to Ring Tip to Ground Ring to Ground Brdg Term10. Resistance Checks 11. Factory Selected ValuesRange dBm Pin 1 to Pin 2 to Performance Check Test Card Description CheckCarrier 75 Unbal Level Accuracy Check Carrier 135 BAL Level Accuracy CheckPerformance Check Test Card Contd Carrier 600 BAL Level Accuracy CheckReturn Loss Check Filter Response Checks MSGProgram Bridging Loss CheckSection Replaceable Parts Introduction Ordering InformationReplaceable Parts 03555-66507 PC Board Assy functionReplaceable Parts Contd 03555-66508 Board Assy amplifierA3 Contd 03555-66506 PC Board Assy filter A4 Contd Chassis Mounted Components Chassis Mounted Components Contd MiscellaneousMiscellaneous Contd Replacement National Part Stock Number Fscm Part Number National Stock Number Cross Reference IndexFscm National Stock NumberPage Model 3555B Appendix a Code List of Manufacturers Circuit Diagrams Functional Block DiagramSchematic Diagrams Reference DesignationsSection Model 3555B Functional Block Diagram 7-4A1 Function Assembly Schematic and Component Location 7-67-8 A4 Filter Schematic and Component Location 7-1011/7-12 Appendix a ReferencesMaintenance Allocation Section I. Introduction General Maintenance FunctionAppendix B Column EntriesTool and Test Equipment Requiremen ts Sec Remarks SecAudio Level Meter TA-885/U TM 11-7725-2779-14&P REF Code NumberManual Backdating Changes Appendix CTransmission and Noise Measuring SET Delete CR6 across M1 Government Printing Office 1980-603-128/66General, United States Army Chief of StaffMajor General, United States Army Adjutant General Active ArmyPage PIN
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