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HP 204C, Technical Manual, Page: 56 / 57

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Summary of Contents for 204C

Page 1: ...This is a reproduction of a library book that was digitized by Google as part of an ongoing effort to preserve the information in books and make it universally accessible https books google com ...

Page 2: ...ERSITY OF MINNESOTA GOVERNMENT PUBLICATIONS LIBRARY JAN 12 1989 U S DEPOSITORY PROPERTY U S G P O D 295 OPERATOR S ORGANIZATIONAL DIRECT SUPPORT GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL HEWLETT PACKARD OSCILLATOR MODEL 2040 HEADQUARTERS DEPARTMENT OF THE ARMY NOVEMBER 1971 GP STORAGE ...

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Page 4: ...NTS Section I INTRODUCTION 1 1 Scope 1 2 Indexes 1 3 Forms and Records 1 4 Technical Characteristics 1 5 Description 1 10 Options Available 1 12 Items Comprising an Operable Equipment Page 1 1 1 1 1 1 1 2 1 3 1 3 1 3 2 5 Section II INSTALLATION 2 1 Introduction 2 3 Initial Inspection Power Requirements 2 8 Grounding Requirements 2 11 Installation 2 13 Bench Mounting 2 15 Rack Mounting 2 17 Combina...

Page 5: ...ge and Amplifier 4 10 Peak Comparator 4 12 AGC 4 14 600 Ohm Attenuator Page 4 1 4 1 4 1 4 1 4 2 4 2 4 2 Section V MAINTENANCE 5 1 Introduction 5 4 Performance Checks 5 6 Dial Accuracy Check 5 7 Flatness Check 5 8 Distortion Check 5 9 Output Voltage and Impedance Check 5 10 Output Control Check 5 11 Sync Output Check 5 12 Sync Input Check 5 13 Balance Check 5 14 Hum and Noise Check 5 15 Adjustment ...

Page 6: ...1589 15 1 TABLE OF CONTENTS CONT Section VI CIRCUIT DIAGRAMS 6 1 Introduction 6 3 Schematic Diagrams 6 5 Component Location Diagrams Page 6 1 6 1 6 1 6 1 Appendix A REFERENCES A 1 B MAINTENANCE ALLOCATION A 2 iii ...

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Page 8: ...UNSATISFACTORY EQUIPMENT Use equipment forms and records in accordance with instructions in TM 38 750 b REPORTS OF PACKAGING AND HANDLING DEFICIENCIES Fill out and forward DD Form 6 Report of Packaging and Handling Deficiencies as prescribed in AR 700 58 Army NAVSUP Publication 378 Navy AFR 71 4 Air Force and MCO P4030 29 Marine Corps C DISCREPANCY IN SHIPMENT DISREP SF361 Fill out and forward Dis...

Page 9: ...re 40 C to 75 C Power Standard AC Line 115V or 230 V 10 50 Hz to 400 Hz 4W Opt 01 Mercury batteries 300 hours opera tion Opt 02 Line Rechargeable batteries 115V or 230V 10 50 Hz to 400 Hz 4W 40 hours operation per recharge NORMAL MODE LOW DIST SODE 0 35 Dimensions 6 3 32 high 5 1 8 wide 8 deep 155 x 130 1 x 203 2 mm 0 1 100 200 PORQUENCY Weight Net 6 lbs 2 7 kg Shipping 8 lbs 3 6 kg Hum and Noise ...

Page 10: ... isolated battery oper ated instrument or better than 40 dB below 20 k lz with an instrument having an ac line connection 1 9 The standard Model 204C contains an ac power supply that can be operated from 115 230 volts ac 50 to 400 Hz The instrument is also available with a mercury battery power supply as an Option 01 or with a rechargeable nickel cad mium battery power supply as an Option 02 The v...

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Page 12: ...el 204C will operate from any source of 115 or 230 volts 10 at 50 to 400 Hz With the instrument disconnected from the ac power source move the voltage selector switch located on the rear panel so the desig nation appearing on the switch matches the nominal voltage of the power source to be used Power dissipation is less than 5 watts 2 7 Line voltage requirements for Option 02 Rechargeable Nickel C...

Page 13: ...h accepts various combinations of submodular units Being a full module unit it can be bench or rack mounted and is analogous to any full module unit 2 19 REPACKAGING FOR SHIPMENT 2 20 The following paragraphs contain a general guide for repackaging of the instrument for shipment Refer to Paragraph 2 21 if the original container is to be used 2 22 if it is not 2 21 If original container is to be us...

Page 14: ...ector switch on the rear panel to the value of available line voltage b Connect AC Power Receptacle to power line voltage c Switch RANGE switch from OFF to desired frequency range d Select desired frequency and voltage output with frequency dial and amp litude controls respectively 3 7 OPERATING CONSIDERATIONS 3 8 FLOATING OUTPUT 3 9 The Model 204C chassis can be isolated from ground by disconnect...

Page 15: ...s the Model 204C output NOTE THE MODEL 204C CAN BE SYNCHRONIZED TO ANY SIGNIFICANT HARMONIC OF AN EXTERNAL SIGNAL HOWEVER IF A NON SINUSOIDAL WAVEFORM IS USED TO SYNCHRONIZE THE MODEL 2040 SOME PORTION OF THE EXTERNAL SYNC SIGNAL WILL BE FED TO THE OUTPUT THIS SMALL SIGNAL WILL APPEAR AS DISTORTION THE AMOUNT OF THIS EXTERNAL DISTORTION WILL BE DIRECTLY PROPORTIONAL TO THE AMPLITUDE OF THE SYNC SI...

Page 16: ...Clo 20 NON CHANGE RCO Slow 1 LOO NORN Ost or S 10 SYNC 6 5 STANDARD POWER SUPPLY CHAROC RATC SLOW T01 7 eo NOTE CHANOC FREO SLOWLY 1 LOW NORM 019T WT CHANGE FRCO SLOWLY I LOW MORN DIST 10 10 OPTION OI POWER SUPPLY OPTION 02 POWER SUPPLY P O Figure 3 1 Description of Controls Indicators and Connectors 3 3 ...

Page 17: ...and amplitude determined by control settings 6 SYNC 1 Provides an input for an external sync signal 2 Provides an output sync signal of 1 7 volts rms 7 Ground Strap Connects the floating circuit chassis to ground 8 Voltage Selector Switch Selects line voltage of 115 volts or 230 volts ac 9 AC Power Receptacle Mates with AC power cord supplied with this instrument for line voltage connection 10 NOR...

Page 18: ...perate as long as the power cord is connected to a power source The resistor placed across the output of the power supply acts as a load in place of the oscillator section to maintain a constant charge rate through the batteries A diode in the output circuit prevents battery discharge when the oscillator is not connected to a power source 3 19 It is recommended that the power cord be connected to ...

Page 19: ...waveform If only one peak is clipped however check the BIAS voltage for proper setting See Para graph 5 21 for BIAS adjustment 3 25 To recharge batteries select either FAST or SLOW charge rate and 115V or 230V ac on rear panel and connect power cord to suitable power source The oscil lator can be used during recharging since the charge rate is the same whether the oscillator is off or operating 3 ...

Page 20: ...of 80 of the rated 225 milliampere hour capacity This is with a ten hour charge and discharge current of 22 5 milliamperes with discharge carried to the normal ten hour end voltage 1 10 volts cell x 5 5 50 volts battery on every cycle Under these conditions a cycle life in excess of 100 cycles can be expected 3 33 When used to power the Model 204C the batteries are discharged at approxi mately a 3...

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Page 22: ... of the block diagram 4 3 BLOCK DIAGRAM DESCRIPTION 4 4 BRIDGE AND AMPLIFIER 4 5 The oscillator bridge consists of two parts the frequency selective network and the amplifier negative feedback network The frequency selective network is CF RF CF and RF The negative feedback divider is Rf Rf and the AGC block BRIDGE CF ERF R AMPLIFIER FREQUENCY DIAL 600n ATTENUATOR OUTPUT Cf RF HE SYNC SRI AGC PEAK ...

Page 23: ...ATOR serves two functions It sets and maintains the AMPLIFIER output at 7 2V peak or 5V rms The output is set with the 7 2V refer ence The output is maintained by comparing the output to the 7 2V reference and feeding any difference voltage detected to the AGC circuit 4 12 AGC 4 13 The positive feedback to the input of the AMPLIFIER is not exactly one third nor is the oscillator gain exactly three...

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Page 25: ...ange 20 Hz to 600 kHz Dynamic Range 80 dB below OdB reference level Accuracy 0 2 Frequency Range 5 Hz to 1 2 MHz hp Model H02 11049A Thermal Converter Bucking Supply See Figure 5 2 for diagram a R fxd 650012 1 b R var 50082 5 C R var 5082 5 d Battery 1 34 V hp Part No 0811 0392 hp Part No 2100 0324 hp Part No 2100 1481 Mallory RM 42R 1 MHz Notch Filter See l igure 5 3 for diagram a R fxd 51052 5 b...

Page 26: ... These checks can be used for incoming inspection periodic maintenance checks and to verify performance after adjustment or repair 5 6 DIAL ACCURACY CHECK a Connect the Model 204C and the Frequency Counter as shown in Figure 5 1 Set the counter to measure frequency and check the Model 204C at the frequencies listed in Table 5 2 for the tolerances indicated Table 5 2 Dial Accuracy Check RANGE SWITC...

Page 27: ...record the THERMAL CONVERTER output as indicated on the DC NULL VOLTMETER d Adjust the BUCKING SUPPLY coarse and fine controls for a OV indication on the DC NULL VOLTMETER Do not readjust the BUCKING SUPPLY controls for the remainder of this check e Check the Model 204C flatness at the frequencies listed in Table 5 3 for the tolerances indicated NOTE The THERMAL CONVERTER is considered a square la...

Page 28: ...e DC NULL VOLTMETER indication by the THERMAL CONVERTER output voltage recorded in step c of this paragraph Multiply this value by 100 to get percent of output change Divide this percentage by the Calibration Report multiplier to obtain a percentage within the tolerances listed in Table 5 3 Example 100 kHz 5 mV Frequency THERMAL CONVERTER output DC NULL VOLTMETER reading Calibration Report multipl...

Page 29: ...lyzer b Set the Mode 204C controls as follows Dial RANGE AMPLITUDE NORM LOW DIST 1 X1K Full CW NORM C Set Distortion Analyzer controls as follows Dial FREQUENCY RANGE METER RANGE FUNCTION SENSITIVITY MODE 10 X100 ODB SET LE VEL MIN MANUAL d Increase the Distortion Analyzer SENSITIVITY to obtain a OdB indication on the meter e Switch Distortion Analyzer FUNCTION to DISTORTION and adjust Distor tion...

Page 30: ...1K X1K X10K X10K X100K X100K 54 dB 60 dB 60 dB 60 dB 60 dB 60 dB 60 dB 60 dB 50 dB i Connect the equipment as shown in Figure 5 3 j Set the Model 204C frequency dial to 10 and the RANGE switch to X10K Adjust the AMPLITUDE control for a 0dB indication on the AC Voltmeter k Switch to the X100K RANGE and adjust the frequency dial and notch filter control for a minimum indication on the AC Voltmeter 1...

Page 31: ... 204C without a 600 ohm load to the AC Voltmeter b Adjust the Model 204C AMPLITUDE to minimum C The meter indication should be less than 50 mV rms 5 11 SYNC OUTPUT CHECK a Connect the Model 204C SYNC output to the AC Voltmeter b The AC Voltmeter should indicate 1 7V rms 5 12 SYNC INPUT CHECK a Connect the Test Oscillator to the AC Voltmeter and adjust controls for 5V rms at 20 kHz b Connect the Mo...

Page 32: ...p at less than 18 6 kHz and greater than 21 4 kHz indicating a sync range of 7 at 5V rms 5 13 BALANCE CHECK a Connect the Model 204C with a 600 ohm load to the AC Voltmeter b Set controls as follows Model 204C Dial RANGE 2 X10K AC Voltmeter RANGE ODB C Adjust Model 204C AMPLITUDE for a meter indication of OdB d Remove the 600 ohm load and connect the equipment as shown in Figure 5 5 e Meter indica...

Page 33: ...kHz 620 kHz RESET 1 Hz C Adjust the Wave Analyzer COARSE for maximum meter indication and adjust the REF ADJ for a 0dB meter indication d Reset Wave Analyzer controls as follows BANDWIDTH FREQUENCY 10 Hz 25 Hz e Set the Wave Analyzer SWEEP to START and observe the meter indication as the Wave Analyzer sweeps to 400 Hz f Reset the SWEEP RATE and BANDWIDTH at the frequencies shown in Table 5 5 The m...

Page 34: ...ooting Procedures Paragraph 5 26 5 19 POWER SUPPLY 5 20 Before making any adjustments check the power supply voltages at test points 2 and 3 They should indicate 13V and 13V respectively If the voltages have decreased to 11 V and 11V the Model 204C may not meet distortion specifi cations 5 21 BIAS ADJUSTMENT a Connect the DC Voltmeter to TP4 BIAS b Adjust R20 BIAS for OV indication on the meter 5 ...

Page 35: ... readings Frequency AGC 10 kHz minus average found above 10 Hz 1 8 V 0 1 V Example X5 5 X10 1 X100 X1K 0 X10K 2 5 1 1 Most positive error Most negative error Average error 5 1 2 Adjust frequency for 9 800 Hz 10 Hz 55 2 5 24 HIGH FREQUENCY ADJUSTMENT a Set the Model 204C RANGE switch to X100K and set the Dial to exactly 10 b With the Model 204C connected to the Frequency Counter adjust C4 HIGH FREQ...

Page 36: ...ome cases the voltages are shown to the nearest tenth of a volt This does not mean that the voltages should be the exact value shown but rather they are meant to indicate the base to emitter voltage drop of the transistors 31 The inner cabinet provides the chassis ground path for C1 When the cabi et is removed for troubleshooting connect a short jumper lead from the bottom of MP26 see Figure 6 1 t...

Page 37: ...TM 11 6625 1589 15 1 CI 26 25 23 22 20 19 18 13 17 15 12 27 3 0 e 10 27 9 28 29 13 27 30 O 32 8 33 343 35 7 36 204C D 4 29Fi gu re 6 1 F ro nt Pa ne l o de d Vi ew 0 9 ...

Page 38: ...agrams 6 3 SCHEMATIC DIAGRAMS 6 4 The circuits contained within each assembly are shown in the schen atic dia grams These diagrams can be used to develop an understanding of the pzinciples of operacion and as an aid to troubleshooting 6 5 COMPONENT LOCATION DIAGRAMS Toded View 6 6 The component location diagrams show the physical location of each part mounted on an assembly Each part is identified...

Page 39: ...ERWISE NOTED RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS 3 I DENOTES POWER LINE GROUND 4 H DENOTES CHASSIS GROUND 5 DENOTES ASSEMBLY 6 DENOTES MAIN SIGNAL PATH 7 DENOTES FEEDBACK PATH 8 DENOTES FRONT PANEL MARKING 9 DENOTES REAR PANEL MARKING 10 DENOTES SCREWDRIVER ADJUST 11 O DENOTES FRONT PANEL CONTROL 12 DENOTES COMPONENTS NOT MOUNTED ON ASSEMBLY 13 OPTIMUM VALUE SELECTED AT FACTORY 14 DENOTE...

Page 40: ...IO R33 R25 R34 R37 RI2 CIO R40 CR3 CR2 R38 R42 R39 R43 CRI R27 R21 07 RIB R 13 R 16 R17 R 14 C 3 RI RIO 9 18 R4 R3 R2 R16 R 1 60 02 07 90 08 OS 04 03 GRN CR6 CR7 CRB R23 R26 C6 WHT C16 C19 C17 C21 R36 R28 R19 R29 C20 R9 RI 52 R30 R24 R20 R6 C4 C8 C2 R22 R8 8 A 204C 1903 AGC 1 3V ΔΕΙ BIAS SI AL hp Part No 00204 66505 Figure 6 2 A1 Component Location Diagram 6 3 ...

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Page 42: ...R7 R9 470K 2 4M R27 39K 13V R21 45303 IOV HE SIB F C6 2 3V IPF QI HE C5 IPF GRN NEGATIVE FEEDBACK CIB са 2 8PF 0 2V R223 4703 R28 549 we AGC FREQ CAL NOTES 1 FOR ALL INSTRUMENTS HAVING SERIAL NUMBERS 808 00201 AND ABOVE CHANGE VALUE OF AICIP TO 6 8 UF AND VALUE AIR25 TO 110 OHMS 2 FOR ALL INSTRUMENTS HAVING SERIAL NUMBERS 808 00501 AND ABOVE ADD CAPACITOR AIC22 20PF BETWEEN CHASSIS GROUND AND THE ...

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Page 44: ...8 2K 24V 24 6V R7 402 w 10 ΧΑΙ 1 13 6V Q5 SHORTING STRAP CR9 25V 94 R8 15 Q6 A2 STANDARD hp Part No 00204 66506 A2 OPTION O2 NICKEL CADMIUM BATTERY POWER SUPPLY ASSEMBLY 00204 66508 BT24 BT23 BT22 BT21 R21 4020 CR25 TAKOF B BT21 6 25I8T22 Ø C22 100 O Ø 6 25V BT23 T21 3 25I8T24 Kiot CR21 TO SIC R I CR22 R22 45 3K 6 25V Lot B WI JI 1 C21 65 32 4V R22 R23 R24 NOTE FOR ALL INSTRUMENTS HAVING SERIAL NU...

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Page 46: ...pment Modification Work Orders TB 746 10 Field Instructions for Painting and Preserving Electronics Command Equipment TB SIG 355 1 Depot Inspection Standard for Repaired Signal Equipment TB SIG 355 2 Depot Inspection Standard for Refinishing Repaired Signal Equipment TB SIG 355 3 Depot Inspection Standard for Moisture and Fungus Resistant Treatment TM 38 750 The Army Maintenance Management Systems...

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Page 48: ...etc This is accomplished with external test equip ment and does not include operation of the equip ment and operator type tests using internal me ters or indicating devices j OVERHAUL Normally the highest degree of maintenance performed by the Army in order to minimize time work in process is consistent with quality and economy of operation It consists of that maintenance necessary to restore an i...

Page 49: ...so includes authorization to per form that function at higher categories The codes used represent the various maintenance cate gories as follows Maintenance Category С Operator Crew 0 Organizational Maintenance F Direct Support Maintenance H General Support Maintenance D Depot Maintenance d Column 4 tools and test equipment Column 4 B 4 Explanation of Format of Table 1 Tool and Test Equipment Requ...

Page 50: ...TENAN CE ALLOCATIO N CHART MAINTENANC E FUNCTIONS GROUP NUMBER COMPONENT ASSEMBLY NOMENCLATURE TOOLS AND EQUIPMENT REMARKS 1 OSCILIA IOR H EWLETT PACKARD 204CF Visual H H 1 t hru 12 1 t hru 12 12 1 t hru 12 Replace fuses and knobs H B 3 5 ...

Page 51: ...ARD H O2 11049A 8 н BUCKING SUPPLY S EE NOTE 1 9 H 1 M HZ NOTCH FILTER S EE NOTE 2 10 BALANCE NETWORK S EE NOTE 3 11 H TERMINATING RESISTANCE H EWLETT PACKARD 0 757 1100 12 F H TOOL KIT E LECTRONIC EQUIPMENT TK 1 00 G 5180 605 0079 NOTES 1 BUCKING SUPPLY C ONSISTING OF 3 BALANCE NETWORK C ONSISTING OF RESISTOR F IXED 6500 OHMS 1 RESISTOR V ARIABLE 500 OHMS 15 RESISTOR V ARIABLE 50 OHMS 15 BATTERY ...

Page 52: ...A USA Depot Long Binh 8 Ft Huachuca 1 USA Depot Qui Nhon 8 OS Maj Comd 2 Units org under fol TOE USASTRATCOM 5 2cys each unit USASTRATCOM PAC 10 11 15 USASTRATCOM SIG GP T 5 11 45 USASTRATCOM CONUS 5 11 97 LOGCOMDS 5 11 98 Eighth USA 10 11 158 USARV 10 11 302 USASUOCOM CRB 5 11 303 USASUPCOM QN 5 11 347 USASUPCOM SGN 5 11 367 USARYIS 5 11 367 ICC 3 11 368 1st Sig Bde 10 11 377 Sig FLDMS PAC 1 11 5...

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Page 57: ...UNIVERSITY OF MINNESOTA 3 1951 DOO 855 929 S PIN 016270 000 ...

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