HP TM 11-6625-2779-14&P Return Loss Check, Filter Response Checks MSG, Program, Carrier 600 BAL

Page 53

PERFORMANCE CHECK TEST CARD (Cont'd)

RETURN LOSS CHECK

 

600 ohms

 

900 ohms

VF/Nm

 

 

 

 

 

 

 

30Hz to 20kHz

 

 

 

 

 

 

>30dB

CARRIER

 

 

 

 

 

 

 

600 ohms, 1kHz to 150kHz

 

 

 

 

 

 

>26dB

135 ohms, 1kHz to 600kHz

 

 

 

 

 

 

> 26dB

75 ohms, 1kHz to 3MHz

 

 

 

 

 

 

>30dB

 

 

 

 

 

 

 

 

FILTER RESPONSE CHECKS

 

 

 

 

 

 

 

C-MSG

 

 

 

 

 

 

 

60Hz

 

 

 

 

 

 

-55.7dBm ±2dBm

200Hz

 

 

 

 

 

 

-25dBm ±2dBm

500Hz

 

 

 

 

 

 

-7.5dBm ±1dBm

1kHz

 

 

 

 

 

 

0dBm (Ref)

2kHz

 

 

 

 

 

 

-1.3dBm ±1dBm

2.5kHz

 

 

 

 

 

 

-1.4dBm ±2dBm

4kHz

 

 

 

 

 

 

-14.5dBm ±3dBm

5kHz

 

 

 

 

 

 

-28.5dBm ±3dBm

3kHz FLAT

 

 

 

 

 

 

 

60Hz

 

 

 

 

 

 

0dBm ±1.75dBm

250Hz

 

 

 

 

 

 

0dBm ±1dBm

1kHz

 

 

 

 

 

 

0dBm (Ref)

2kHz

 

 

 

 

 

 

-0.5dBm ±1.75dBm

2.5kHz

 

 

 

 

 

 

-1.5dBm ±2dBm

3kHz

 

 

 

 

 

 

-3dBm ±3dBm

15kHz FLAT

 

 

 

 

 

 

 

60Hz

 

 

 

 

 

 

0dBm ±1.75dBm

250Hz

 

 

 

 

 

 

0dBm ±1dBm

1kHz

 

 

 

 

 

 

0dBm (Ref)

5kHz

 

 

 

 

 

 

0dBm ±1dBm

10kHz

 

 

 

 

 

 

-0.5dBm ±1.75dBm

12.5kHz

 

 

 

 

 

 

-1.5dBm ±2dBm

15kHz

 

 

 

 

 

 

-3dBm ±3dBm

PROGRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

200Hz

 

 

 

 

 

 

-17.3dBm ±2dBm

500Hz

 

 

 

 

 

 

-6.6dBm ±1dBm

1kHz

 

 

 

 

 

 

0dBm (Ref)

2kHz

 

 

 

 

 

 

+4.8dBm ±2dBm

4kHz

 

 

 

 

 

 

+6.5dBm ±2dBm

5kHz

 

 

 

 

 

 

+6.5dBm ±2dBm

6kHz

 

 

 

 

 

 

+6.4dBm ±3dBm

8kHz

 

 

 

 

 

 

+4dBm ±3dBm

10kHz

 

 

 

 

 

 

-8.5dBm ±4dBm

BRIDGING LOSS CHECK

 

 

 

 

 

 

 

VF/Nm 900 BAL, 1kHz

 

 

 

 

 

 

0.3dBm

VF/Nm 600 BAL, 1kHz

 

 

 

 

 

 

<0.3dBm

CARRIER 600 BAL, 10kHz

 

 

 

 

 

 

<.05dBm

INPUT BALANCE CHECK

 

 

 

 

 

 

 

VF/Nm 600 BAL

 

 

 

 

 

 

 

60Hz

 

 

 

 

 

 

>80dB

6kHz

 

 

 

 

 

 

>70dB

20kHz

 

 

 

 

 

 

>50dB

CARRIER 600 BAL

 

 

 

 

 

 

 

1kHz to 10kHz

 

 

 

 

 

 

>70dB

1kHz to 100kHz

 

 

 

 

 

 

>60dB

1kHz to 600kHz

 

(3)

 

 

 

 

>40dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 52 Page 54
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Page 52 Page 54
Contents HEADQUARTERS, Department of the Army TM 11-6625-2779-14&P Reporting Errors and Recommending ImprovementsTechnical Manual Headquarters Department of the Army NSNReplaceable Parts Iii List of IllustrationsList of Tables Scope Maintenance Forms, Records, and ReportsSection Introduction Reporting Equipment Improvement Recommendations EIR Administrative StorageDestruction of Army Electronics Materiel Items Comprising an Operable Equipment Voice Frequency Level Measurements 20Hz to 20kHz SpecificationsSection General Information Introduction SectionAccessory Equipment Supplied Accessory Equipment SuppliedInstrument Identification BAL ModificationWarranty Exception Section Installation InspectionPower Requirements BatteryCover Removal Installation and Removal of BatteryBattery Controls Connectors IndicatorsSection Operating InstructionsFront Panel Controls, Indicators, and Connectors Front, Side and Rear Pane Side Panel Controls and Connectors Level Measurements Level and Noise MeasurementsPage Noise Measurement Applications Recorder CompatibilityRecorder Compatibility Chart Transmission Loss Measurements Identifying Noise CharacteristicsCrosstalk Measurements Crosstalk Correction FactorMeasurements in DBC 0dBm Reinstall the set in its caseInput jacks are connected in parallel. If a 600 ohm 135 BALLevel Measurement Noise Metallic Measurements Step ProcedureRecorder Calibration Noise-to-Ground Measurements Balance MeasurementExample Transmission Loss MeasurementSection Theory of Operation Introduction Block Diagram DescriptionSimplified Dial BAT Function Detailed Circuit DescriptionRange Attenuator A2 Input Amplifier A3. Schematic NoFILTERS. Schematic No Setting AttenuationRange Attenuator Pads UsedKHz Flat and Program Weighting Curves C-MSG and 1SkHz Flat Weighting Curves DETECTOR. Schematic No Meter AMPLIFIER. Schematic NoPower Supply and Series Regulator Schematic No Instrument Recommended Type Required Characteristics Model Section Maintenance IntroouctionFactory Selected Values BAL ConversionLevel Accuracy Checks Performance ChecksFunction CARRIER, 75 Unbal TMS, TermRange Unbal Carrier Accuracy CheckFrequency 30Hz to 1MHz 100Hz to 600kHz 1MHz to 3MHz20Hz to 20kHz 40Hz to 15kHz 100Hz to 20kHz 100Hz to 15kHz Return Loss CheckReturn Loss Test Set-Up MSG dBm 3kHz Flat dBm 15kHz Flat dBm Program dBm Filter Response ChecksFilter Response Checks Bridging Loss Input BalanceTMS Brdg Input TMS BrdgPower Supply Check Adjustment and Calibration ProcedureUnbal Calibration Attenuator CalibrationBalance Check Frequency Response AdjustmentCommon Mode Adjustment Filter Calibration Assembly RemovalTroubleshooting Procedures Troubleshooting Tree Dial BAT Front Panel Trouble AnalysisFunction Troubleshooting Front Panel TroubleshootingRange Troubleshooting Front Panel Trouble Analysis ContdFilter Troubleshooting Troubleshooting Input AmplifierTroubleshooting the Meter Amplifier and Detector Defective FunctionFunction Input Jacks DIAL/AC MON Jacks Function Switch Resistance ValuesTip to Ring Tip to Ground Ring to Ground Brdg TermRange dBm Pin 1 to Pin 2 to 11. Factory Selected Values10. Resistance Checks Description Check Performance Check Test CardCarrier 75 Unbal Level Accuracy Check Carrier 135 BAL Level Accuracy CheckCarrier 600 BAL Level Accuracy Check Performance Check Test Card ContdFilter Response Checks MSG Return Loss CheckProgram Bridging Loss CheckOrdering Information Section Replaceable Parts Introduction03555-66507 PC Board Assy function Replaceable Parts03555-66508 Board Assy amplifier Replaceable Parts ContdA3 Contd 03555-66506 PC Board Assy filter A4 Contd Chassis Mounted Components Miscellaneous Chassis Mounted Components ContdMiscellaneous Contd Part Number National Stock Number Cross Reference Index Replacement National Part Stock Number FscmFscm National Stock NumberPage Model 3555B Appendix a Code List of Manufacturers Functional Block Diagram Circuit DiagramsSchematic Diagrams Reference DesignationsSection Model 3555B 7-4 Functional Block Diagram7-6 A1 Function Assembly Schematic and Component Location7-8 7-10 A4 Filter Schematic and Component Location11/7-12 References Appendix aMaintenance Function Maintenance Allocation Section I. Introduction GeneralAppendix B Column EntriesRemarks Sec Tool and Test Equipment Requiremen ts SecAudio Level Meter TA-885/U REF Code Number TM 11-7725-2779-14&PTransmission and Noise Measuring SET Appendix CManual Backdating Changes Government Printing Office 1980-603-128/66 Delete CR6 across M1Chief of Staff General, United States ArmyMajor General, United States Army Adjutant General Active ArmyPage PIN
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