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432A Power Meter Operating & Service Manual

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1. 02 778 3417 Baltic Countries 358 08872 2100 Czech Republic 420 2 4743111 Denmark 45 99 10 00 Finland 90 88 721 France 0 1 69 82 60 60 Germany 0180 532 62 33 Greece 30 1 7264045 Hungary 36 1 4618219 Ireland 01 284 4633 Israel 972 3 5380333 Italy 02 92 122 241 Netherlands 020 547 6669 Norway 22 73 57 50 Poland 48 22 6087700 Portugal 11 482 85 00 Russia 7 095 928 6885 Fax 7 095 916 9844 South Africa 27 11 8061000 Spain 34 1 631 1323 Sweden 08 444 22 77 Switzerland 01 735 7111 Turkey 90 212 2245925 United Kingdom 01344 366 666 For countries in Europe Middle East and Africa not listed contact Hewlett Packard International Sales Europe Geneva Switzerland Tel 41 22 780 4111 Fax 41 22 780 4770 Latin America Hewlett Packard Latin American Region Headquarters 5200 Blue Lagoon Drive 9th Floor Miami Florida 33126 U S A Tel 305 267 4245 305 267 4220 Fax 305 267 4288 United States Hewlett Packard Company Test and Measurement Organization 5301 Stevens Creek Blvd Bldg 51L SC Santa Clara CA 95052 8059 1 800 452 4844
2. COLLECTOR 20V MAIN NPN TRANSISTOR 43V oon CONTROL Y EMITTER CURRENT COLLECTOR 20V MAIN PNP TRANSISTOR 3v CURRENT CONTRON EMITTER CURRENT FIELD EFFECT TRANSISTORS BI POLAR TRANSISTORS BLACK EPOXY METAL CASE PLASTIC BLACK EPOXY PLASTIC TRANSISTORS 7 28 ECB METAL CASE DIODES DIODE SYMBOL ANODE ___ CATHODE JL we CONICAL STRIPE END 3 i K A EBC METAL CASE TRANSISTORS DUAL ji e Ult C A SHIELD A SS Figure 5 4 Transistor Biasing and Operating Characteristics Model 432A Section V Maintenance Table 5 6 Etched Circuit Soldering Equipment Specification Item Recommended Soldering Tool Soldering unsoldering Wattage rating 37 5 Tip Temp 750 800 F Ungar 776 handle with Ungar 1237 Tip Size 1 8 OD Soldering Tip Soldering unsoldering Shape General Purpose Size chisel Ungar PL113 1 8 De soldering Aid Unsoldering multiconnection Suction device to remove mol Soldapult by the Edsyn components ten solder from connection Company Arleta Calif Resin flux Sol Remove excess flux from Must not dissolve etched circuit Freon Acetone Lacquer vent soldered area before appli base board material or conduc Thinner Isopropyl Alco cation of protection coating tor bonding agent hol 100 dry Solder Component replacement cir Resin flux core high tin con cuit board repair or wiring tent 60 40 tin le
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4. Section IV Principles of Operation Combining equations we have V V COMP2 RF2 4R RF power Ap or V 2 Vor2 _ COMP RF RF power e A L V Vep IV V 4R COMP RF COMP RF 4 12 Thus an RF power measurement reduces to setting VCOMP VRFO with zero RF power ini tially measuring VCOMP and VRF and computing with the above formula The 432A carries out the computation by forming the indicated sum and differ ence performing the multiplication and displaying the result on a meter 4 13 The meter logic circuits change the two dc voltages totwo pulse signals which contain all the RF power information One of the signals will be a square wave whose amplitude is proportional to VCOMP VRF The other signal will have a pulse width pro portional to Vcomp VRF 4 14 The VCOMP VRF Signal is obtained by tak ing the dc voltage outputs from the Al assembly and applying them to a chopper circuit This chopper circuit is driven by a 5 kHz multivibrator The out put of the chopper is a square wave signal whose am plitude is proportional to VCOMP VRF The output of the chopper is coupled to the range amplifier and then to the calibration factor amplifier The amplifi cation that the signal receives in these two amplifiers depends upon the setting of the RANGE switch and the CALIBRATION FACTOR switch The output of the calibration factor amplifier is V This current is fed to the electronic switch A squar
5. 0757 0401 2100 1770 0757 0461 0811 2284 0757 0199 0811 2284 0757 0199 0698 3260 0757 0289 Section VI Model 432A Replaceable Parts Table 6 1 Replaceable Parts Reference HP Part Number Oty Description Mfr Part Number Designation 0757 0439 R FXD MET FLM 6 81K OHM 1 1 8W 0757 0439 FOR OPT 013 R FXD MET FLM 28 7K OHM 1 1 8w OPT OLA 0757 0465 R FXD MET FLM 100K OHM 12 1 8W 06 98 344 9 0698 3449 0757 0465 0757 0465 0757 0442 0757 0279 0757 0279 0757 0279 0757 0465 RIFXD MET FLN LOOK OHM 17 1 8wW 0757 0442 R FXD MET FLM 10 0K OHM 1 BN 0757 0279 R FXO MET FLM 3 15K OHM 1 84 0757 0279 R3FXD MET FLM 3 16K OHM 2 84 0757 0279 RIFXD MET FLM 3 16K OHM 1 84 0757 0279 0699 3160 0698 3160 0757 0199 0757 0279 R FXD MET FLM 3 16K OHM 1 84 0698 3160 R FXO MET FLM 31 6K OHM 1 80 0698 3160 R FXD MET FLM 31 6K OHM 1 84 0757 0199 R FXD MET FLM 21 5K OHM 1 84 FOR OPT 012 0757 0443 R FXD MET FLM 11 0K OHM 1 84 0757 0443 FOR OPT 013 RIFXD MET FLM 46 4K OHM 1 1 8W LOPT 011 R FXD MET FLM 261K OHM 13 2 8w 0698 3162 0698 3162 0698 3455 0698 3455 OPT 010 R VAR FLM 1 MEGOHM 20 LIN 1 2W R FXD COMP 1 8 MEGOHM 5 1 44 TERMINAL SOLOER LUG TERMINAL SOLDER LUG 2100 1618 0683 1855 0360 0124 0360 0124 2100 1618 CB 1855 0360 0124 0360 0124 PART OF PC BOARD 0360 0124 0360 0124 0360 0124 0360 0124 0360 0124 00432 6015 0180 1819 0180 0229 0160 2917 0160 2917 3140
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7. 100 AI 1 Model 432A Appendix II APPENDIX Il INSTALLATION OF LONG CABLE OPTIONS AII 1 Information in this appendix describes installation of the long cable options used with the 432A Power Meters Table AII 1 lists the options cable length and stock numbers After completion of the installation procedures the power meter should be recalibrated using the procedures in Section V of this manual NOTE These cable option kits are for mount resistances ot either 100 or 200 ohms AII 2 Depending on the option selected the following components are added or replaced with parts supplied with the option kits a C2 b R10 R11 R12 and R13 c AILR382 and A1R42 d A2C45 AII 3 The following equipment is required for the installation of the long cable options a Soldering Tool wattage rating 37 5 b De soldering aid c Pozidriv screwdriver small d Pozidriv screwdriver medium Table AII 1 432A Power Meter Long Cable Options Cable Length Option Kit Number feet 009 10 010 00432 6018 00432 6019 20 00432 6020 50 00432 6021 100 00432 6022 200 AII 4 No substitution can be made for long cables listed in Table AII 1 Long cables from the older power meters such as the 431 series cannot be interchanged with 432A long thermistor cables because of resistance variations AII 5 If a long cable option of 20 feet or longer is used with a balanced thermistor mount such as the HP 8478B
8. 2 14 Internal Battery Operation 2 1 5 29 Top Cover Removal 5 9 2 16 Battery Installation 2 1 5 30 Top Cover Replacement 5 9 2 17 Battery Storage 2 1 5 31 Bottom Cover Removal 5 9 2 19 Rack Mounting 2 1 5 32 Bottom Cover Replacement 5 9 2 21 Combining Case 2 1 5 33 Adjustment Procedures 5 10 2 23 Adapter Frames 2 2 5 34 Initial Setup 5 10 2 25 Repacking for Shipment 2 2 5 35 Mechanical Meter Adjustment 5 10 III OPERATING INFORMATION 3 1 5 36 Bridge Amplifier Tests 5 10 Seck Introduction cited tddi 3 1 5 37 Meter and Recorder Output 3 4 Controls Connectors and Indicators 3 1 Calibration 5 10 3 12 Battery Operation 3 1 5 38 Battery Charger Adjustment 3 17 Microwave Power Measurement Option 01 Only 5 11 ACOCULACY acer 3 2 5 39 Battery Removal 5 11 3 23 Calibrator Factor and Effective 5 40 Isolating Trouble in Transistor EGGENE spianato n 3 2 C IPCUIDSS e Wou ee Qu ae n 5 11 3 27 Precision Power Measurement 3 2 5 46 Out of Circuit Testing 5 13 3 28 Generali suis edad vi t 3 2 5 48 Component Replacement in 3 30 Measurement Procedure 3 2 Etched Circuits 5 13 5 50 Axial Lead Components 5 13 IV PRINCIPLES OF OPERATION 4 1 5 52 Oth
9. 3 27 PRECISION POWER MEASUREMENT 3 28 GENERAL 3 29 Using precision instruments and careful pro cedures measurement error can be reduced to 0 2 of reading 0 5 uW The technique involves 1 zero ing the bridge circuits and measuring the bridge amp lifier output voltage difference with a digital volt meter then 2 connecting RF power to the thermistor mount and then measuring the bridge amplifier output voltage difference again and 3 calculating the power from the two measurements Figure 3 1 shows the instrument setup for dc substitution measurement Use an HP Model 3440A DVM with a 3443A Plug in Unit or a digital voltmeter with equivalent accuracy 3 30 MEASUREMENT PROCEDURE a Connect the DVM to the 432A rear panel Vcomp and VRF outputs Be sure that the digital voltmeter input is isolated from chasses ground b Turn off or disconnect the RF power from the thermistor mount Model 432A 3440A 3443A VCOMP VRF REAR In 432A e THERMISTOR MOUNT RF Web a Figure 3 1 Precision Power Measurements Section HI Operating Information c Zero the 432A with the COARSE ZERO controls d Depress the FINE ZERO toggle and measure the differential voltage Vo between Vcomp and VRF Vo V Vv COMP RF e Release the FINE ZERO toggle and turn on or reconnect the RF power to the thermistor mount f Measure again the differential voltage V1 be tween VRE and Vo OMP Vi V
10. Do not position the instrument such that access to the coupler is impaired For continued protection against fire hazard replace the line fuse only with the same type and line rating T100 mA 250 V The use of other fuses or materials is prohibited If this instrument is not used as specified the protection provided by the equipment could be impaired This instrument must be used in a normal condition only in which all means for protection are intact No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers 1 3 Model 432A Section II Installation SECTION II INSTALLATION WARNING Ifthis instrument is not used as specified the protection provided by the equipment could be impaired This instrument must be used in a normal condition only in which all means for protection are intact 2 1 INITIAL INSPECTION 2 2 MECHANICAL CHECK 2 3 If damage to the shipping carton is evident ask that the carrier s agent be present when the instrument is unpacked Inspect the instrument for mechanical damage Also check the cushioning material for signs of severe stress 2 4 PERFORMANCE CHECKS 2 5 The electrical performance of the Model 432A should be verified upon receipt Performance checks suitable for incoming inspection are given in Section V Maintenance 2 6 DAMAGE CLAIMS 2 7 If the instrument is mechanically damaged in transit
11. E Agilent Technologies OPERATING AND SERVICE MANUAL HP 432A POWER METER SERIAL NUMBERS For important information about serial numbers see INSTRUMENT IDENTIFICATION in Section I Eva Agilent Technologies Copyright HEWLETT PACKARD COMPANY 1968 1972 1998 1501 PAGE MILL ROAD PALO ALTO CALIFORNIA U S A Manual Part No 00432 90079 Table of Contents Model 432A TABLE OF CONTENTS Section Page Section Page I GENERAL INFORMATION 1 1 V MAINTENANCE Cont 1 1 Description 2 62282 bs Rx REG 1 1 5 14 432A Performance Tests with 1 5 Instrument Identification 1 1 8477A Calibrator 5 1 1 7 Operating Environment 1 3 5 15 Initial Setup 5 1 1 11 Cooling Requirements 1 3 5 16 Meter Accuracy Test 5 1 1 13 Cleaning ici reed i 1 3 5 17 Calibration Factor Test 5 2 5 18 Meter Linearity Check 5 2 II INSTALLATION 22d 2 1 5 19 Zero Carryover Test 5 2 2 1 Initial Inspection 2 1 5 20 Fine Zero Range Check 5 3 2 2 Mechanical Check 2 1 5 21 432A Calibration Without 2 4 Performance Checks 2 1 8477A Calibrator 5 3 2 6 Damage Claims 2 1 5 24 Calibration Procedure 1 5 3 2 9 Three Conductor Power Cable 2 1 5 26 Calibration Procedure 2 5 9 2 12 Primary Power Requirements 2 1 5 27 Cover Removal and Replacement 5 9
12. Extended storage at high temperature will reduce the cell charge but will not damage the battery if the storage temperature is below 140 F Install the battery in the instrument and recharge before using Model 432A in battery operation 2 19 RACK MOUNTING 2 20 Model 432A is narrower than full rack width It is what is termed a sub modular unit When used alone the instrument can be bench mounted When used in combination with other sub modular units it may be bench or rack mounted The HP 1051A and 1052A Combining Cases and Rack Adapter Frames are designed specifically for this purpose 2 21 COMBINING CASE 2 22 A model 1051A Combining Case is shown in Figure 2 1 This case is full rack width and accepts varying combinations of submodular instruments The case purchased separately is provided with a rack mounting kit The combining case will hold three 2 1 Section II Instaliation W ADAPTER FRAME SPACER CLAMP RETAINING SCREWS Figure 2 1 Sub module Installation in Rack Adapter Frame W INSERT DIVIDER ENGAGING TABS IN TOP AND BOTTOM MOUNTING SLOTS TWIST DIVIDER TO VERTICAL POSITION PUSH IN TO LIMIT SLIDE LATCH TO LOCK DIVIDER Model 432A instruments the same size as the Model 432A When instruments are installed in the combining case they may be installed or removed individually 2 23 ADAPTER FRAMES 2 24 The 5060 0797 Adapter Frame is shown in Fig ur
13. Maintenance 5 33 ADJUSTMENT PROCEDURES 5 34 INITIAL SETUP a Remove the power meter side panels b Connect the equipment as shown in Figure 5 1 Refer to Table 5 1 for equipment specifications 5 35 MECHANICAL METER ADJUSTMENT a When the meter is properly zero set the pointer rests over the zero mark on the meter scale when the instrument is 1 at normal operating temperature 2 in its normal operating position 3 turned off b Set the pointer as follows to obtain best accur acy and mechanical stability 1 Turn instrument off 2 Rotate the meter mechanical adjustment screw clockwise until the meter is to the left of zero and moving up the scale toward zero Stop when the pointer is exactly over the zero mark If the pointer overshoots repeat step 2 3 When the pointer is exactly on zero rotate the adjustment screw approximately three degrees counterclockwise This frees the adjustment screw from the meter suspen sion If the pointer moves during this step repeat steps 2 and 3 3440A 3443A VRE VCOMP gen t EIS ro Var RE AR TO compl THERMISTOR MOUNT CABLE Figure 5 3 Bridge Amplifier Test Mode1 432A 5 36 BRIDGE AMPLIFIER TESTS a Connect equipment as shown in Figure 5 3 b Compensation Bridge 1 Connect 3440A 3443A between A1TP5 and A1TP6 using 10K isolation resistors 2 Make the following settings 432A RANGE ii ana REESE 10 mW MO
14. SPACER CABINET SIDE COVER BLUE GRAY SIDE COVER CLIVE GRAY TOP COVER BLUE GRAY TOP COVER OLIVE GRAY BOTTOM COVER BLUE GRAY BOTTOM COVER OLIVE GRAY REAR PANEL FRONT PANEL LIGHT GRAY FRONT PANEL MINT GRAY METER TRIM LIGHT GRAY METER TRIM MINT GRAY Section Vi Replaceabie Parts Mfr Part Number 5960 0703 1490 0031 5040 0700 5060 0727 5020 0700 5000 0703 5000 8565 5060 0106 5060 8549 5000 0711 5000 8571 00432 00022 00432 00021 00432 00033 5020 0704 5020 7633 Table 6 2 Code List of Manufacturers MANUFACTURERS AS OF 06 03 72 MANJFACTURER NAME ADDRESS ALLEN BRADLEY CO TEXAS INSTRUMENTS INT SEMICINIUZTOR COMPONENTS DIV MUTIRCLA SEMICINDUC TAR PRIDI INS FAIRCHILD CAMERA E INST CORP SEMICUNDUC YO DIV C 6 K COMPONINTS INC SPECIALTY CONNFZTOR TO HEWLETT PACKARD CO MILWAJKEE AES DALLAS TEX PHOENIX ARIZ MDUNTAIN VIEW NEWTON MASS INDIANAPOLIS IND PALO ALTO CALIF PALO ALTO CALIF ADAMS MASS CHICAGO ILL ELK GROVE VILLAGE ERIE PA DES PLAINES ILL CRYSTAL LAKE file WARMINSTER PA WASHINGTON D C CHICAGO ILL JSALLALA NEBR ANAHEIM CALIF CHICAGO ILL CALIF INC CORPORATE 40 HEWLETT PACKAPD CO MICROWAVE DIV SPRAGUF ELECTRIC COL No BEL DEN CARP CINCH MFG 35 DIV TRW INC ILL ERIE TECHNILIGICAL PRO LITTELFUSF INC JAK MFG CO DIV JAK ELETTIO NETIZCS CORP CONTINENTAL AIRT FLETTRONIZS C339 ELFCTRONIC INDUSTRIFS ASSOCIATI
15. The voltage at the top of the RF bridge VRF is responsive to both input RF power and ambient temperature changes The voltage at the top of the compensation bridge VCOMP iS responsive only to ambient temperature changes Knowing VRF and VCOMP the RF power can be calculated 4 4 The meter logic section processes VRF and VCOMP to produce a meter current proportional to RF power The sum VRF VCOMP controls the width of 5 kHz pulses The difference VCOMP VRF is chopped amplified and fed to an electronic switchactuated by the controlled width pulses There fore the meter current is pulses of variable height and width with the meter indicating the average cur rent This process produces a meter current pro portional to VRF VCOMP VRF VCOMP Par agraph 4 10 explains why this is necessary 4 5 FUNCTIONAL BLOCK DIAGRAM 4 6 A functional block diagram of the 432A power meter is shown in Figure 4 2 The instrument com prises two major assemblies bridge assembly Ai and meter logic assembly A2 Auto zero circuit A1A1 which provides for automatic zeroing of the instru ment is included as part of logic assembly Al 4 7 The thermistor bridges are biased with direct current from the bridge amplifiers Each bridge amplifier supplies enough heating current to bring the thermistor resistance to 100 or 200 ohms de pending upon the setting of the MOUNT RESISTANCE switch on the 432A If one of the thermistor bridges isunbala
16. Use power cord provided HP 8120 0078 Line power limits are 115 230 Vac 48 440 Hz Check FUSE rating and position of line voltage slide switch before connecting power Line Voltage Slide Switch Set to line voltage available 115 or 230 Vac 48 440 Hz Mounting Hole for Option 002 Model Power Meters Thermistor mount cable connector installed and wired in parallel with front panel connector Only one mount at a time may be used with the power meter Section III Operating Information Ver Input Connected directly to RF bridge Used for calibrating power meter with HP 8477A Power Meter Calibrator Also used for precision power measurements Vcomp Input Connected directly to compensation bridge Used for calibrating power meter with HP 8477A Power Meter Calibrator Also used for precision power measurements RECORDER OUTPUT Voltage from meter circuit to be used for recorder or digital volt meter Output impedance is approx 1000 NOTE The photograph opposite is for illustration purposes only Figure 3 3 Rear Panel Controls and Connectors Sheet 2 of 2 3 7 Section III Operating Information 432A POWER METER CALIBRATION FACTOR Cap HEWLETT PACKARD FINE ZERO mW RANGE dBm ER 10 10 COARSE ZERO Figure 3 4 Turn On and Zeroing Procedure Sheet 1 of 2 Model 432A Model 432A Connect thermistor mount and cable to THERMISTOR MOUNT connector Refer to Table 1 2 for r
17. vil Regulatory Information Model 432A Safety Symbols The following symbols on the instrument and in the manual indicate precautions which must be taken to maintain safe operation of the instrument The Instruction Documentation Symbol The product is marked with this symbol when it is necessary for the user to refer to the instructions in the supplied documen Frame or chassis ground terminal typically connects to the equipment s metal frame WARNING Warning denotes a hazard It calls attention to a proce dure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning note until the indicated conditions are fully understood and met Caution denotes a hazard It calls attention to a proce dure which if not correctly performed or adhered to could result in damage to or destruction of the instru ment Do not proceed beyond a caution note until the indicated conditions are fully understood and met The CE mark shows that the product complies with all relevant European Legal Directives ISM 1 A This is a symbol of an Industrial Scientific and Medical Group 1 Class A product The CSA mark is a registered trademark of the Cana dian Standards Association and indicates compliance to A the standards layed out by them viii Model 432A Noise Declaration LpA lt 70dB am Arbeitsplatz operator position normaler Betrieb normal position nach DIN
18. 0 2 to 0 4 volt 20 to 40 mA through R3 when battery is fully charged f Disconnect the test equipment and power and replace the power meter top and side panels 5 39 BATTERY REMOVAL a Remove the top cover b Removethe two Phillips screws on the top rear of the battery cover c Lift off the battery cover d Loosen the nuts on the battery binding posts e Lift out the battery 5 40 ISOLATING TROUBLE IN TRANSISTOR CIRCUITS 9 41 General The following information should help determine if a transistor works There are tests for both in circuit and out of circuit transistors which help to determine if a particular trouble is due to a faulty transistor of some other component See Figure 5 2 Table 5 5 Out of Circuit Transistor Resistance Measurements emitter Small Signal emitter PNP Germanium emitter Power emitter Small Signal collector NPN Silicon Power collector t See Back Dating Appendix I Connect Ohmmeter Positive Lead to To test for transistor action add collector base short Negative Lead to Measure Resistance ohms base 200 500 collector 10K 100K base 30 50 collector several hundred emitter 1K 3K emitter very high might read open emitter 200 1000 emitter high oftengreater than 1M Measured resistance should decrease Section V Model 432A Maintenance DEVICE SYMBOL CUT OFF CONDUCTING
19. 0234 0140 0234 0180 1746 0140 0210 0160 0978 0180 2930 0180 2178 0160 2930 0189 1940 0180 0197 0160 2672 0180 0197 0160 2917 0160 2917 0160 2150 0180 0229 0160 2917 01 80 0106 0180 0197 01 80 0197 0180 0106 0180 1714 0160 2253 0160 2930 0180 0229 0160 2917 1901 0026 1901 0026 1901 0026 TERMINALSSOLDER LUG PART GF PC BOARD TERMINALZSOLOER LUG TERMI NALSSOLDER LUG TERMINALSSDLDER LUG TERMINAL SOLOER LUG BOARD C3FXD C FXD C fFXxO ASSY LOGIC ELECT 100 UF 75 10 5O0VDCW ELECT 33 UF 10 lQV CH CER 0 05 UF 80 20 LOOVOCH NDT ASSIGNEO C FXD CER 0 05 UF 80 20 LOOVDCH NOT ASSIGNED NOT ASSIGNED C FXD C FXD C EXD C F XD C FXD C FXD MICA 500 PF 12 MICA 500 PF 12 ELECT 15 UF 10 20VDCW MICA 270 PF 5 MICA 1530 PF 1 500VO0CW CER 0 01 UF 80 207 LODVOCH NOT ASSIGNED NOT ASSIGNEO C FXD C FXD C FXD C3FXO C3FXD C FXD CiFXO ELECT 220 UF 20 8VDCW CER 0 01 UF 80 20 100VDCW ELECT 33 UF 103 15vDCHW ELECT 2 2 UF 103 20VOCH MY 0 047 UF 5 80VDCNW ELECT 2 2 UF 103 ZOVDCW CER 0 05 UF 80 20 LOGVOCH NOT ASSIGNEO C FXD C FXD CF XD C FXO C FXD C FXD C FXD C FXD C FXD opt C FXD C FXD CER 0 05 UF 80 20 100VDCW MICA 33 PF 52 ELECT 33 UF 10 10VDCH CER 0 05 UF 80 20 100YVDCw ELECT 60 UF 20 6VO0CW ELECT 2 2 UF 103 20VDCw ELECT 2 2 UF 10 20YDCW ELECT 60 UF 20 6VDCN ELECT 330 UF 10 oVOCW 011 012 013
20. 1 mW 21 2 di vision d Set the 8477A POWER MW selector to 2 mW e The 432A meter should indicate 2 mW 1 2 di vision f Set the 8477A POWER MW selector to 3 mW g The 432A meter should indicate 3 mW 1 2 di vision h Set A2S1 to OPERATE 5 19 ZERO CARRYOVER TEST a Disconnect the 432A from the 8477A b Turn the 432A power OFF and connect the thermistor mount cable to a thermistor mount c Set the 432A Power Meter MOUNT RESISTANCE selector to the resistance shown on the thermistor mount d Turn ON the 432A power Model 432A HP 432A POWER METER RECORDER OUTPUT IOK THERMISTOR MOUNT OSCILLOSCOPE HP 140A 1401A 1422A Figure 5 2 Zero Carryover Test Setup e Connect 141A through filtering network to rear of 432A as shown in Figure 5 2 Set 141A controls as follows IN AE AER DC SENSITIVITY c so Di LoL d Ass 1 mV cm SWEEP TIME 2 sec cm TRIGGER LEVEL max clockwise free run f Zero the 432A as follows 1 Set the RANGE selector maximum cw to COARSE ZERO 2 Set the COARSE ZERO screwdriver adjust so that the meter indicates zero 3 Set 432A RANGE switch to 01 mW De press the FINE ZERO switch The meter indication should go to zero without over shoot g Rotate the RANGE switch clockwise one step at a time while the oscilloscope is sweeping On each 432A range the scope trace should be within 01 mW division 5 mW from where it was on t
21. 432A RANGE to 10 mW 8477A POWER mW to 10 mW and ZERO TEST to ZERO Nod When switching 432A to 10 mW or switch ing from 10 mW to any other range the meter will react slowly for a short period This is due to time constants in the in strument and is normal i Check zero and adjust as necessary j Set ZERO TEST to TES T and adjust A2R86 for DVM reading of 1 00 001V k Return432A RANGE and 84 77A POWER switches to 1 mW and zero as before l Adjust A2R6 for DVM reading of 1 000 001V m Perform the adjustments of steps h through 1 again until 432A reads 1 010V at recorder output on both 1 mW and 10 mW ranges n Set A251 to OPERATE o Turn to the beginning of this section verify that the instrument meets its specifications by com pleting the PERFORMANCE TESTS 5 37A AUTO ZERO ADJUSTMENT A1R43 a Remove the right side panel b Connect a mount to the 432A and adjust COARSE ZERO Section V Maintenance c Switch RANGE to 20 dBm push FINE ZERO down and adjust A1R43 for a zero indication on the front panel meter d Release FINE ZERO and replacethe right side panel 5 38 BATTERY CHARGER ADJUS TMENT OPTION 01 ONLY a Remove the power meter top panel b Connect 432A to ac line power and turn ON c Set A7R8 fully counterclockwise for maximum battery charge rate d With thedigital voltmeter measure the voltage between A TP1 and A7TP2 e Adjust A7R8 for digital voltmeter reading of
22. 5 8 To avoid errors due to possible ground loop currents isolate the power meter from ground used for other auxiliary equipment A power plug adapter that removes the ground connection at the line outlet can be used to isolate the power meter 5 9 Several circuit components are factory selected to meet specific circuit requirements The factory selected parts are indicated on the schematic dia grams 5 10 TEST EQUIPMENT 5 11 Instruments and accessories required for ad justing and testing the power meter are listed and briefly described in Table 5 1 Instruments used to maintain the instrument must meet or exceed the specifications given 5 12 SERVICE INFORMATION 5 13 Service information in the form of trouble shooting waveforms schematics and component lo cations are given in Section VII Also an overall system block diagram is included which contains keyed numbers corresponding to the test points 5 14 432A PERFORMANCE TESTS WITH 8477A CALIBRATOR 5 15 INITIAL SET UP a Connect the 8477A outputs to the 432A inputs as shown in Figure 5 1 Use appropriate test equipment as listed in Table 5 1 3440A 3443A le RECORDER OUTPUT REAR e QC UN to Ver TA V TO COMP E THERMISTOR MOUNT CABLE Figure 5 1 Check and Adjustment Test Set Up b If necessary mechanically zero the meter movement as follows 1 With instrument turned of rotate meter adjustment screw c
23. SI Jar izdue aues ay Jo ure3 ayy oBuvi MU 0 ou ur 9 SI uoryenu 1 ye UNUNXEA andino ayy sojen U3JJE YINAS ay pue sqenba ured rautydwe soduei r u o Te UI Afaarpadssa Mu 100 an MUI CO wol Saduvz Tamad 10 9 I 0 I WOU Sdajs ajatasip ut ute3 rouiidwe 93uel ay s15 13S I door xogqpaan Burjern1oso wouj z tjt dure ay daan pou pue AZouttduv aduey 9 qe5 pue Junow 1035101194 E nu p 19 uuoo jou are Ady ese ur punoui3 ramod 04 aso p punoa Iroljstur u ay daax Ing Surjonpuoouou qpeur1ou SIE EZYHI ZWAJD IP SYZOTA Inq ZH3 S ye spunosf ayy Sajdnod gp WOripouuoo uouiuro2 TO STWAISY ay WOUJ 2 2 A uouwoo Ajddns ramod ay ajerosi EZHO pue ZZHMO SFO H1Ud T1YMDIS aBeyoA z TUA dWODA e apraoud piy pue peuzy GLUZV BLUZY uonisod WyYO YOZ ay UT GLY pue 84H jo uorjounf au je poutwns ale JU pue dWODA uonounp Sururumg 02 VZEP au Sure1qreo USYM awit 3837 pa3np31 pu asuodsa a ouanbo wnwmdo 103 apraogd 0 6ZIZY uo SUIT aBIBYID ay SIINP3I SIYI Uonisod Spuno r jtn3112 x TI ds JajI1BAUOJ 29UuIT 03 98 3 0A BY 01 o 9 ie JLWHANTVI 34 Ul EPUTV SSOIDE 10o9utuoo SI 8LUTY 10393198 93e1ado aye quien Ju ar 0492 vu a MO J9Q pue aAoqe e3ugJ juourjsn pe da AEY Synoda Ne quayeatnba sr yeusts yndyno ay jo apnizzzie yead o yead ay BS 019Z 19 9U1 au EYI os yw moqe 39 1n0S w ou a T 910Jo1auL sj
24. Table 1 1 lists those accessories supplied and also those available Table 1 1 Instrument Type Automatic self balancing power meter for use with temperature compensated thermistor mount Power Range 7 ranges with full scale readings of 10 30 100 and 300 uW 1 3 and 10 mW also calibrated in dBm from 20 dBm to 10 dBm full scale in 5 dB steps Accuracy 1 of full scale on all ranges 0 C to 55 C Calibration Factor Control 13 position switch normalizes meter reading to account for thermistor mount Calibration Factor Range 100 to 88 in 1 steps Thermistor Mount External temperature compensated thermistor mounts required for operation see Table 1 2 Meter Taut band suspension individually computer calibrated mirror backed scales Milliwatt scale more than 4 1 4 inches 108 mm long Zero Carryover Less than 0 5 of full scale when zeroed on most sensitive range 1 5 INSTRUMENT IDENTIFICATION 1 6 Hewlett Packard instruments are identified by an 8 or 10 digit serial number The first four digits are the Serial Prefix To properly match a manual with the instrument to which it applies the prefix on the instrument must be the same as the prefix at the front of the manual If the numbers are different information 1s supplied either on yellow Manual Change Supplements or in an Appendix in the Manual If the change information is missing contact your HP Sales Office Sales Offices are listed at
25. WW 100 OHM 0 1Z 1 108 R FXD Wii 100 OHM 0 17 L IONW R3FXD WW 100 OHM 0 13 1 100 R FXD WW 100 OHM 0 1 1 10 RSFXD MET FLM 10 0 OHM 1 1 20 R FXD MET FLM 10 0 OHM 12 1 2W R FXO MET FLM 100 OHM 17 1 29 R FXD MET FLM 51 1K OHM 1 1 8W R FXD MET FLM 5 62K OHM 1 1 8N FOR OPT 011 R FXD MET FLM 2 87K OHM 1 1 8w OPT 012 K FXO MET FLM 1 33K OHM 1 1 8W FOR OPT 011 RSFXO MET FLM 9 09X OHM 1 1 84 FOR OPT 011 RSFXD MET FLM 4264K 1 1 8 OPT 012 R FXD MET FLM 2 15K OHM 1 1 8w DPT 013 amp FXD MET FLM 14 7K OHM LI 1 84 OPT 012 R FXD MET FLM 23 TK OHM 13 1 8w OPT 012 RIFXD Wa LOK OHM 0 17 1 40W SWITCH PUSHBUTTON DPDT OB POWER SWITCH SLIDE OPDT PART GF REAR PANEL SWITCH LEVER SINGLE SECTION MT RES SwITCH PLATE SWITCH FOGGLE SPOT FINE ZERO NUT DRESS CABLE ASSY 5 FT CABLE ASSY SPECIAL PURPOSE 10 FT OPT 009 LABLE ASSY SPECIAL PURPOSE 20 FT OPT 010 See introduction to this section for ordering information Section VI Replaceable Parts Mfr Part Number 1420 0062 29C14TA CDH 1500225X9020A2 DYS AlH 313 100 5 1251 1280 00432 2005 28JR 128 1 284R 128 1 28JR 128 1 EAC 301 1120 1497 0370 0077 0370 0193 0370 0432 5040 0345 5040 0702 0403 0131 0403 0026 00432 0005 00432 0006 00432 0007 00432 0011 2100 2849 2950 0034 00432 20046 0811 2538 0811 2538 0811 2538 0811 2538 0757 0984 0757 0984 0757 0198 0757 0458 0757 0200 0698 3151 0757 03
26. dwe ayi sadeys asay Jo Juru pue ules ay JO ungai e sy sinooo gouanb as ajisoddo ay LAZO Jo uorjounf reyruwo eseq au Sastiq premaoj 4 26 JO aseq ayy je dwer ay uouy jo pouanj st Aurjonpuoo sem yorym 6Z pue uo pau my St jjo pauan SEM YDIUM gz 770 Suan pue lajpiwo Sy MOJ9Q umop patind st 126 Jo aseq ayy 926 nay puno13 0 pajJous st peudts HA dWODA ayy voum SOYOJIMS pajdnoo op 358 are 620 pue 820 LZO lanrpdury Suryo 1AS Adeanooe rajau Joj pajenipe st pue dwe ay sjonuos Ayddns oA L au jo e3e3 oA ayy due e a3e19u93 o 622 331849 o qua JIno Jue suoo sorpddns 028 33INOS Puarmo YA og YIAANMJNY 000 vB ri 82u Alt oc A18W3SSV 21901 y aaddoyy Ajddas remod ay wouj peudis ZHX G au so dnooap CS SOA 9 0 Je 949 aanmod unwixew ay sdureqo SINO IZ WOUJ teu31s y uioJj aseyd J0o mo 081 St Indyno 3ABM arenbs ayi 3JO M3 0j UOTIEINZES WOJJ USALIP SI ZO Jonrmdury Model 432A Principles of Operation Section IV JO 1 39948 orngWaYIS Super ATddng 10Modg VZEp I9PONM S p PINA A ASSY 2190131308 O LAVO VE MNu3h1 vete OO Ode DL IVA AN DIGI 10004405 tu2V vozy Q3u515 v LON 1 wm ddy 911 0 wG 335 Ten 9312313 AMOLIYS 039uvH5 59306 15311v8 NGLIYY340 3MI NI NMOHS SZIDPLIOA 31ON ae d x bh S ou or sd 150 19 SI SMONLWNOISZO 30N34343u HILIMS NOIL2
27. edge on the lead may damage the plated through conductor e Solder the component in place and remove ex cess flux from the soldered areas Appiy a protec tive coating to prevent contamination and corrosion See Table 5 6 for recommendations CAUTION Most ohmmeters can supply enough cur rent or voltage to damage a transistor Before using an ohmmeter to measure transistor forward or reverse resistance check its open circuit voltage and short circuit current output ON THE RANGE TO BE USED Open circuit voltage must not exceed 1 5 volts and short circuit current must be less than 3 mA Model 432A 6 1 INTRODUCTION SECTION VI REPLACEABLE PARTS 6 2 This section contains information for ordering replacement parts Table 6 1 lists parts in alpha numerical order of their reference designators pro vides the following information on each part a Description b Manufacturer of the part in a five digit code see list of manufacturers in Table 6 2 c Manufacturer s part number d Total quantity used TQ column BT CP CR DL DS AFC AMPL BFO BE CU BH BP BRS BWO CCW CER CMO COEF COM COMP COMPL CONN CP CRT CW DEPC DR ELECT ENCAP EXT F FH FIL H FXD G GE GL GRD 01194 13 4 H l n H H H H Hl W 44 n u x U u n ut H H H jl Hf H ou uUo pn assembly motor battery capacitor coupler diode delay line device signaling lamp misc elec
28. further filtered so the voltage at the rear panel RECORDER output is suitable for use with either a digital voltmeter or X Y recorder The RECORDER output voltage is returned to the compensation bridge through the automatic zero circuit when the FINE ZERO switch is depressed The automatic zero circuit holds a correction volt age at the input of the compensation bridge amplifier so when the RFis zero the meter indication will also be zero Section IV Principles of Operation Model 432A UEISEI NOOIA VZLP T9PON Z P INDIA QUIZ Oinv LV IV NOIJVSN3d4WO2 3Uun1Vu3d4W31 1112802 0432 OLNY IBA Ho OL TWNOtLHOdOUd HLOIM ISINA SU 4 ANODA UUU stooz pre am en eee te s nn 390188 NOILVSN34WOS 831H3ANOOD 3AWiL 0L 39V1 10A d n 28 LI l AA srlooz Lo du A ao 143080938 1 INNON YHOLSINYIHL 831113 YOLVUSIA SSvd MO7 I1 10 NMW I a 1INIYII l i ONIM WAS I D l varo m f YOLIVJ l NOLVH8ITv2 l di INdNI dY l YOLSIWM3HL HOLIMS Y314Nawv TS 4 VA 3M A IO a 9INOY1 3313 N t YUMMY f 390188 390149 JBA AHO UUU n 4H a srooz e ABA IWO OL i TYNOILYOdOYd FONLINIAWY ISINd l EE _ I I I I I 21901 VILIW CY ASSV 3501489 IV 4 3 Model 432A Principles of Operation Section IV Z Jo 1 JOYS oryeur ouos SUITNTEL oSprig HU VZ F IPPON E p SINBL
29. information To provide a meter reading proportional to RF power the dc voltages VRF VCOMP must be further processed by the meter logic circuits 4 10 The required processing is derived as fol lows Pois absorbed power needed by the RF therm istor to bring its resistance to R ohms 100 or 200 ohms Po consists of two components RF power and dc power supplied by the 432A The self balancing action of the bridge circuit automatically adjusts the dc power so that the total power in the thermistor is Po This dc power is relatedto the voltage VRF at the top of the bridge by Vy 2 2 R Thus P RF power DC power Var 4R RF power 4 11 RF power can be determined by measuring VRF with and without applied RF power and then doing some arithmetic But this power measuring scheme is neither convenient nor temperature compensated since Pg changes with temperature The 432A in troduces another thermistor bridge circuit exposed to the same ambient temperature but not RF power This circuit includes adjustments COARSE and FINE ZERO sothat the dc voltage VCOMP at the top of its bridge can be set equal to VRF Assuming matched RF and compensation thermistors VRFO with no RF power and VCOMP remain equal with ambient tem perature fluctuation They differ only when the RF power to be measured is applied to the RF thermis tor Thus we have Vcomp RF when RF power 0 and V 2 COMP 0 Po 4R 4 1
30. must be returned to a service facility designated by HP Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to HP from another country HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument HP does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not apply to defects resulting from 1 Improper or inadequate maintenance adjustment calibration or operation by Buyer 2 Buyer supplied software hardware interfacing or consumables 3 Unauthorized modification or misuse 4 Operation outside of the environmental and electrical specifications for the product 5 Improper site preparation and maintenance or 6 Customer induced contamination or leaks THE WARANTY SET FORTH IS EXCLUSIVE AND NO OTHER WARRANTY WHETHER WRITTEN OR ORAL IS EXPRESSED OR IMPLIED HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Limitation of Remedies and Liability THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES IN NO EVENT SHALL HP BE LIABLE FOR DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDI
31. notify the carrier and the nearest Hewlett Packard field office immediately A list of field offices is at the back of this manual Retain the shipping carton and padding material for the carrier s inspection The field office will arrange for replacement or repair of your instrument without waiting for claim settlements against the carrier 2 8 Before shipment this instrument was inspected and found free of mechanical and electrical defects If there is any deficiency or if electrical performance is not within specifications notify your nearest Hewlett Packard Sales and Service Office 2 9 THREE CONDUCTOR POWER CABLE 2 10 To protect operating personnel the National Electrical Manufacturers Association NEMA recommends that the instrument panel and cabinet be grounded All Hewlett Packard instruments are equipped with a three conductor power cable which when plugged into an appropriate receptacle grounds the instrument The offset pin on the power cable three prong connector is the ground wire 2 11 To preserve the protection feature when operating the instrument from a two connector outlet use a three prong to two prong adapter and connect the green pigtail on the adapter to ground 2 12 PRIMARY POWER REQUIREMENTS 2 13 The Model 432A operates from 115 or 230 volts ac line voltage Line frequency may vary from 48 to 440 Hz A slide switch on the rear panel is moved to the correct position for the line voltage avail
32. socket connections and pin numbers Model 432A TEST POINT MEASUREMENT CONDITIONS AND VOLTAGES Measurement Conditions 1 3 mW 2 200 ohm mount 3 100 CAL FACTOR 4 COARSE ZERO turned to get full scale deflection 5 Measurements made with respect to CHASSIS GROUND Test Point Voltages Test Point Voltage Notes AITPI 5 2 AITP2 5 2 A1TP3 2 7 AITP4 X2 A1TP5 2 7 AITP6 2 7 AUT Di 1 2 RANGE to COARSE ZERO meter zeroed AITP3 6 5 Varies from 0 to 13 V under normal operating conditions A1TP9 4 mV Thermistor ground A2TP1 Waveform Figure 7 3 A2TP2 Waveform Figure 7 3 A2TP3 7 Nominal A2T P4 13 Nominal A2TP5 OV Chassis Ground A2TP6 Waveform Figure 7 3 A2TP7 Waveform Figure 7 3 A2TP8 Waveform Figure 7 3 A2TP9 Waveform Figure 7 3 A2TP10 Waveform Figure 7 3 ATTPI 1 Variable ATTP2 1 6 Variable Model 432A 6 5V ASSY Al I 6 V i V NOM ae 1 ERES dr SC gt bo E E LA Sek E e Si uS 23 ASSY A2 ASSY A Figure 7 4 Model 432A Test Point Locations Model 432A TABLE 7 5 AUTO ZERO CIRCUIT P 0 A1 TROUBLESHOOTING yo CHECK 01 02 amp di ASSOCIATED a an MEASURE VOLTS M i AT TP7 WHILE ME DEPRESSING FINE COARSE ZERO VES ia REPLACE CH amp CCH s ee BAD SEALED FET VOLT a TPS g GE ASSEMBLY MAL LIMITS AT CHECK CCW 11 8V un VOLTAGE CH 4 5V CH UV SWITCH AT SHOULD BE AT LEAST YES TO i 8V VARIATION COARSE a ZERO CHECK No 8 TABLE 7 6 CHOP
33. the user to transistor stages In a few instances specific parts are calledout as being possible causes of circuit mal function however the troubleshooting charts are not intended to locate specific parts that have failed They are intended to locate only malfunctioning stages 7 8 SCHEMATICS 7 9 The schematics contain signal routing infor mation nominal voltage levels and notes that assist in understanding the circuit They are laid out to show electrical operation and are not intended as wiring diagrams 7 10 Component location photographs next to the schematic foldouts indicate the physical location of parts Test points are also shown and are marked on the schematic in the same manner as they are in the meter 7 11 Factory selected parts are indicated by an as terisk These are components that generally are in stalled to fulfill circuit operation requirements They may be the nominal value or they may be some value close to nominal In any case if the component fails circuit operation should be verified after these com ponents are replaced 7 12 A1A1 AUTO ZERO ASSEMBLY 7 13 The Auto Zero circuit is encapsulated and must be replaced as a unit A solder removing tool such as the Soldapullit suction device listed in Section V is required to remove solder around the leads After solder is removed the unit must be carefully removed from the circuit cardin such a manner that the circuits on the card do not de
34. 0698 3156 0757 0397 0757 0199 0757 0442 0757 0465 0698 3266 0757 0461 0698 3160 0757 0465 0698 3155 0698 3155 0757 0465 C 1065 0757 1094 0757 0465 C8 1065 0757 0280 0698 3260 0757 0279 0698 3160 0698 3428 0698 3160 0698 3260 0757 0442 0698 3260 0695 3260 0698 0084 CB 1055 0698 3260 0757 0439 0757 0442 0757 0461 0696 3160 0757 0442 0698 3438 0698 3156 0698 3160 0757 0401 0757 0199 2109 1769 0698 4466 0757 0346 0698 3160 0811 2277 0811 2277 0811 2537 0698 3441 2100 1618 C8 1065 0757 0405 6126 0018 0360 0124 Section VI Replaceable Parts Model 432A Table 6 1 Replaceable Parts Reference e Mfr 0360 0124 TERMINAL SOLDER LUG 0360 0124 0360 0124 TERMINALSSOLDER LUG 0360 0124 0360 0124 TERMI NAL SGLOCR LUG 0360 0124 0360 0124 TERMINAL SOLDER LUG 0360 0124 0360 0124 TERNINAL SOLDER LUG 0360 0124 0360 0124 TERMINAL SOLDER LUG 0360 0124 0360 0124 TERMINAL SOLDER LUG 0360 0124 0360 0124 TERMINALZSOLDER LUG 0360 0124 0360 0124 TERMINAL SOLDER LUG 0360 0124 90432 6003 SWITCH ASSY RANGE 00432 6003 0811 2536 R FXD WW 3167 OHM 0 1 1 40W 0811 2536 0811 2284 RiFXO WW IK OHM 0 1 i 40u 0811 2284 0811 2534 R3FXO WW 314 3 OHM 0 13 1 40W 0811 2534 0811 2535 R FXD WW 145 0 OHM 0 1 1 40W 0811 2535 3100 2470 SWITCH ROTARY 3100 2470 00432 6004 SWITCH ASSY CALIBRATION FACTOR 00432 6004 0757 0346 R FXD MET FLM 10 OHM 13 1 8 0757 0346 0757 0346 R FXD MET FLM 10 OHM 1X 1 84 0757 03
35. 1 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1901 0026 1854 0071 18 54 0062 1854 0071 1853 0012 1853 0020 1853 0020 1853 0020 1854 0071 1854 0003 1853 0001 1854 0071 1853 0020 18 54 0005 1854 0071 1854 0071 1854 0005 1354 0071 1854 0071 1854 0009 1854 0009 1855 0062 1855 0062 1854 0071 1854 0071 1853 0015 1853 0020 1855 0062 1854 0071 1854 0071 1853 0020 1853 0020 1854 0071 1854 0071 0757 0279 0683 0685 0757 0835 0757 0447 2100 1773 0757 0289 0757 0280 0757 0458 0757 0401 0757 0465 0757 0442 0757 0447 0757 0442 0757 0279 0757 0198 DIODE SILICON 0 75A 200PIV DIODE SILICON O T5A 200PIV DIODE BREAKDGWNS6 20V 2 DIODE SILICON 0 75A 200PIV DIODESSILICON 0 75A 200PIV NOT ASSIGNEO NOT ASSIGNED DIODE SILICON OI ODE SILICON NOT ASSIGNED DIODE SILICON DI DDE SILICON DIODE SILICON DIODE SILICON DIGOE SILICON DIGOE SILICON DIQOE SILICON DIODESSILICON DIDDE SILICON OF OO0E SILICON 0 75A De 5A 0 75A 0 75A 0 75A 0 75A 0 75A 0 75A De TSA 0 754 0 75A 0 754 200PIV 200PIV 200PIV 200PIV 200P1V 200PIV 200Piv 200PIV 200PIV 200PIV 200P IV 200PIV TSTR SI TSTR SI TSTRISI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI1 TSTR SI NPN SELECTED NPN NPNILSELECTED PNP PNP SELECTED PNP CSELECTED PNP SELECTED NPN SELECTED NPN SELECTED PNP SELECTE
36. 100K OHM 17 1 8W R FXO COMP 10M OHM 53 1 4w NOT ASSIGNED NOT ASSIGNED R FXD MET FLM IK OHM 12 1 8W R FXO MET FiM 6 K OHM 13 1 8N R FXD MET FLM 3 16K OHM 1 1 8W R FXD MET FLM 31 6K OHM 1 1 84 R FXD MET FiM 14 7 OHM 1 1 8w RIFXD MET FLM 31 6K OHM 17 l 8w R FXO MET FLM 464K OHM 1 1 8 FACTORY SELECTEO PART RIFXD MET FLM 10 0K OHM 1 1 84 R FXD MET FLM 464K OHM 1X 1 8w R3FXO MET FLM 46 K OHM 1 1 8W R FXD MET FLM 2 15K OHM 13 1 8W R FXD COMP 1 MEGOHM 5 1 48 NOT ASSIGNED NOT ASSIGNED R FXD MET FLM 464K OHM 17 1 84 RsFXD MET FLM 6 81K OHM 1 1 8 R FXD MET FLM 10 0K OHM 13 1 8W R FXD MET FLM 68 1K OHM 13 1 8 R FXD MET FLM 31 6K OHM 1 1 8W R FXD MET FLM 10 0K OHM LE 1 8W R EXD MET FLM 147 OHM 13 1 8w R FXD MET FLM 14 7K OHM 13 1 8w R FXO MET FLM 31 6K OHM 1X 1 8N R FXO MET FLN 100 OHM 12 1 8w R FXO MET FLM 21 5K OHM 13 1 8w R VAR Wu 50 OHM 5 TYPE H lw R FXD MET FLM 976 OHM 1 1 8N R FXO MET FLM 10 OHM 1 1 8W RaFXD MET FLM 31 6K OHM 1 1 8W R FXO WW 1OK OHM O 1 1 40w R FXD WW 10K OHM O 1X 1 40M R FXD WW 5K DAM 0 17 1 40w NOT ASSIGNEO NOT ASSIGNED R FXD MET FLM 215 OHM 17 1 8W NOT ASSIGNED NOT ASSIGNED R VAR FLM 1 MEGUHM 20 LIN 1 2W R FXD COMP LOM OHM 5X l 4w R FXD MET FLM 162 OHM 12 1 8W SWITCH SLIOE DPDT 0 5A i25V AC DC TERMI NAL SOLOER LUG See introduction to this section for ordering information 3698 3401 0698 3156 0757 0442 0757 0442 0698 3260 0698 3260 0757 0442 0757 0442
37. 17 0757 0288 0698 3155 0696 0084 0698 3156 0698 3158 0811 2277 53 67280 121 A1H 114 1242 TYPE 184 00432 00031 7109 00432 2003 8120 1082 8120 1083 8120 1084 6 7 Section VI Replaceable Parts Reference up Part Number Designation 8120 1359 8120 1360 8120 1361 8120 1348 00432 6010 1251 0172 1251 0172 00432 0008 00432 0009 1400 0084 Table 6 1 Replaceable Parts Description THERMO CABLE SPECIAL PURPOSE 50 FT opt 011 THERMO CABLE SPECIAL PURPOSE 100 FT OPT 012 THERMO CABLE SPECIAL PURPOSE 200 FT OPT 013 CABLE ASSY POWER DETACHABLE CABLE ASSY POWER SWITCH CONNECTOR PC EDGE 1 ROW 22 CONTACT PART OF LOWER DECK CONNECTOR PC EDGE 1 ROW 22 CONTACT PART OF LOWER DECK BRACKET BATTERY UPPER GPT 001 BRACKET BATTERY LOWER COPT 001 FUSEHOLDER EXTRACTOR POST TYPE See introduction to this section for ordering information Model 432A Mfr Part Number 8120 1359 8120 1360 8120 1361 KHS 7041 00432 6010 250 22 30 210 250 22 30 210 00432 0008 00432 0009 342014 Model 432A Reference HP Part Number Designation GN x oo za H Ow 5060 0703 1490 0031 5040 0700 5060 0727 5020 0700 5000 0703 5000 8565 5060 0706 5060 8549 5000 0711 5000 8571 00432 00022 00432 00021 00432 00033 50 20 0 704 5020 7633 Table 6 1 Replaceable Parts Description Oty CABINET PARTS FRAME ASSY 6 X ll SM STAND TILT HINGE FODT ASSY
38. 1A banana plug and test clips Cable Assembly Shielded cable with one each BNC and dual HP 11000A banana plug connectors Thermistor Mount Operating Resistance 100 ohm or 200 ohms HP 478 8478 Division Ratio 10 1 2 HP 10001A Bandwidth dc to 30 MHz Rise Time 5 nsec Differential Voltmeter Accuracy 0 005 of reading HP 740B 0 0004 of range 1 uV Resistor 2 10K 1 1 8 watt 0757 0442 Vertical Plug in Oscilloscope Probes 2 5 0 Model 432A Section V Maintenance SECTION V MAINTENANCE 5 1 INTRODUCTION 5 2 This section provides information for perform ance testing adjusting troubleshooting and repair ing the 432A Power Meter Performance tests allow the instrument to be checked for conformance to spec ifications If performance is not within specifications adjust or troubleshoot the instrument 5 3 CONTENT 9 4 PERFORMANCE TESTS 5 5 The procedures test power meter performance for incoming inspection periodic evaluation calibra tion and troubleshooting Specifications in Table 1 1 are the performance standards If the power meter fails to meet any of the performance test specifica tions refer to the troubleshooting diagrams 5 6 ADJUSTMENTS 5 7 Procedures describe the adjustments necessary to calibrate the power meter Adjust the power me ter only when it is determined that the meter is out of adjustment and not malfunctioning due to a circuit failure
39. 31OBd r z INZUND M3AO eee 9 _ _ AT18W3SSY 390108 BOiSIMRIJHL IV O d 4 Wi I e e v V _ o evx Od 40009 25900 MBWISSY ISO JILIN ZY O d Ivo bario 311vg 4 8 Section IV Principles of Operation Model 432A 1N34un23 KS IGAT Di yue3suoo Ajddas AEI 943 Poy 0 puno 3 oj Ayddns Agp au ro Apddns Alt 94 490119 Wouj juod ano ssed ues yey rojen3ou yunus e urro DI pue eb 7 JO Z PS oryeureuog SIMMEL Ajddns 1emogq VZEF 9poIN G paIn t4 vlude bIZI QINIISSY LON 9 99 p 143 Sto ein 20 jo 103991109 ay Je asueyo a emoA Aue soy iidure ga Jayyduy 10113 L JO ase0A 193jrure aseq au ut SUOTJEJALA IMI B1aduo 10 Sej esuadwuoo LN SSaT 10 atou sjonpuoo L SHIYS Ayddns Ag 2U JI Ayddns AL 01 P 2u949 9 SI SHOA J fem SIUL EIN pue Zr Jopratp au uo a euoa 343 03 puno13 Dd dns 1amod au so Teduroo L 19ypduy uosiredwo I XION3dd Y SNiLYO NIVB 335 4 FHWA 034123138 AGOLIVI 0308VMD 9N 30 A53J1v8 NOILVH3dO INIA NI NADHS 39U1 IDA LHD 0 qua zaino serq sar ddns gu AL 103 BZEZ CA 39U9 19 Jax 8 SIPIAOIA HI 3DUIIIJIH IFETOA S eudtS 10443 SANITAUE p sor muy UOTJEXQIJEO 19jaur Iamod ay SjoJquoo T frajawot Uajad zpuounsnipe Kpddns remod 94 SI OH PO 07 paj pue par Tide sr aouatajjip Auy punou3 03 yeyj safedwoo pue
40. 45635 pt 19 per ISO 7779 Regulatory Information 1X Section I Model 432A CALIBRATION FACTOR 432A POWER METER 3 HEWLETT gt PACKARD 96 EDI a 82 96 i00 em 8 i T RESISTANCE i FINE ZERO mW RANGE 98 2 ARETE AR ye T PPAR MOUN H Figure 1 1 0 gure 1 1 HP Model 432A Power Meter Model 432A Section I SECTION GENERAL INFORMATION 1 1 DESCRIPTION 1 2 The Hewlett Packard Model 432A Power Meter with HP temperature compensated thermistor mounts measures RF power from 10 microwatts 20 dBm to 10 milliwatts 10 dBm full scale with 1 of full scale accuracy from 10 MHz to 40 GHz With a selector switch the instrument normalizes the power meter reading to compensate for the Callibration Factor of a thermistor mount used for a given measurement For portable operation Option 01 instruments have a rechargeable nickel cadmium battery See Table 1 1 for complete specifications 1 3 The Model 432A has provision for dc substitution measurements and for power meter calibration An output is provided for recorders or digital voltmeter readout 1 4 Accessories Two accessories are supplied with the Model 432A Power Meter a 7 5 foot 2290 mm detachable power cable and a 5 foot 1520 mm cable that connects the thermistor mount to the meter Thermistor mounts are available but not supplied with the Power Meter refer to Table 1 2
41. 46 0757 0346 R FXD MET FLM 10 CHA 13 1 8W 0757 0346 0757 0346 R FXD MET FLM 10 OHM 13 1 8N 0757 0346 0757 0346 R FXD MET FLM 10 OHM 12 1 8w 0751 0346 9757 0346 R FXO MET Fim 10 OHM 18 1 8w 0757 0346 0757 0346 R FXD MET FLM 10 OHM 12 1 8W 0757 0346 0757 0346 R FXD MET FLN 10 DHM 13 1 84 0751 0346 0757 0346 R FXD MET FLM 10 OHM 17 1 8W 0757 0346 0757 0346 R3FXD MET FLM 10 OHM 17 1 8w 0757 0346 0757 0346 R FXD MET FLM 10 OHM 17 1 8w 0757 0346 0757 0346 R3FXD MET FLM ID OHM 13 1 8W 0757 0346 0698 6635 R FXD MET FLM 880 OHM 13 1 8W 0698 6635 3100 2469 SWITCH ROTARY 3100 2469 NOT ASSIGNED NOT ASSIGNED 00432 6007 BOARD ASSY BATTERY CHARGER 00432 6007 FOR OPTION 001 0160 2930 C FXD CER 0 01 UF 80 20 LOCVOCW TA 1901 0026 DIODE SILICON 0 754 200PIV R1358 8 1902 0048 OIGDESBREAKDOWN 6 81V 53 SZ 10939 134 1854 0039 TSTR SI NPN 2N3053 1853 0020 TSTR SI PNPISELECTEO FROM 2N3702 1853 0020 1854 0071 TSTR SI NPNISELECTED FROM 2N3704 1854 0071 1854 0071 TSTR SI NPNISELECTED FROM 2N3704 1854 0071 0698 3635 R sFXO MET OX 680 OHM 5 2w 0698 3635 0757 0280 R3FXD MET FLM 1K OHM 17 1 8W 0757 0280 0757 0346 RSFXD MET FLM 10 OHM LZ 1 8W 0757 0346 0757 0439 RsFXO MET FLM 6 81K OHM 1 1 8 0757 0439 0757 0280 R FXD MET FLM IK DAM 13 1 88 0757 0280 0757 0199 R FXO MET FLM 21 5K OHM 1 1 88 0757 0199 0698 3156 R FXD MET FLM 14 7K OHM 1X 1 8W 0698 3156 FACTORY SELECTED PART 2100 1776 R VAR WW LOK OHM 5 TYPE H lw 2100 1176 See introduction
42. 57 0442 0757 0642 0698 3260 0698 3260 0757 0442 0757 0442 0698 3156 0757 0397 0757 0199 0757 0442 0757 0465 0698 3266 0757 0461 0698 3160 0757 0465 0698 3155 0698 3155 0757 0465 0683 1065 0757 1094 0757 0465 0683 1065 0757 0280 0698 3260 0757 0279 0698 3160 0698 3428 0698 3160 0698 3260 0757 0442 0698 3260 0698 3260 0698 0084 0683 1055 0698 3260 0757 0439 0757 0442 0757 0461 0698 3160 0757 0442 0698 3438 0698 3156 0698 3160 0757 0401 0757 0199 2100 1769 D698 4466 0757 0346 0693 3160 0811 2277 0811 2277 0811 2537 0698 3441 2100 1618 0683 1065 0757 0405 3101 0973 6309 0124 R3FXD MET FLM 215 OHM 12 1 20 NOT ASSIGNED NOT ASSIGNED R FXD MET FLM 14 7K OHM 13 1 8w R FXD MET FLM 10 0K OHM 1 1 80 RIFXO MET FLM 10 0K OHM ix 1 8h R FXD MET FLM 464K OHM 12 1 84 RIFXD MET FLM 464K OHM 13 1 8W R FXD MET FLM 10 0K OHM 1 1 8m R FXD MET FLM 10 0K OHM 1 1 34 R3FXD MET FLM 14 7K OHM LZ 1 8w R FXD MET FLM 68 1 OHM 12 1 84 NOT ASSIGNED NOT ASSIGNED R FXO MET FLM 21 5K OHM 13 1 84 R FXO MET FLM 10 0K OHM 12 1 8w 3FXD MET FLM 100K OHM 17 1 8W RSFXD MET FLM 237K OHM 1 1 8w R2FXO MET FLM 68 1K OHM 1 1 8w R3FXD MET FLM 31 5K OHM 13 1 8W R FXD MET FLM 100K OHM 13 1 8W R FXD MET FLM 4 64K OHM 1Z 1 8w R FXO MET FLM 4 64K OHM 17 1 8NW R FXD MET FLM 100K OHM 1 1 8W R FXD COMP 10M QHM 53 1 4W R FXD MET FLM 1 47K OHM 12 1 8w NOT ASSIGNED NOT ASSIGNED R FXD MET FLM
43. 6 7 8 Model 432A Rear Panel Interior 71 10 3 4 Turn On and Zeroing Procedure 3 8 7 9 RF and Compensation Bridge 4 1 Model 432A Simplified Block Diagram 4 0 Schematic Diagram 7 11 4 2 Model 432A Block Diagram 4 3 7 10 Model 432A Switches 7 12 4 3 Model 432A RF Bridge Talking 7 11 A2 Meter Logic Assembly Component SNE TEE 4 4 Locations deuda aqhatam 7 13 4 4 Model 432A Meter Logic Talking 7 12 Meter Logic Schematic Diagram 7 13 SCHEMA koke wes lia 4 6 7 13 A2 Meter Logic Assembly Power Supply 4 5 Model 432A Power Supply Talking Component Locations 7 15 SCHEMALIO ins Aen een rs 4 8 7 14 AT Battery Charging Circuit Option 01 5 1 Check and Adjustment Test Setup 5 1 Component Locations 7 15 5 2 Zero Carryover Test Setup 5 3 7 15 Power Supply Schematic Diagram 7 15 5 3 Bridge Amplifier Test 5 10 7 16 Thermistor Cable Wiring Diagram 7 16 5 4 Transistor Biasing and Operating CharacteristicS 5 12 111 Regulatory Information Model 432A Declaration of Conformity according to ISO IEC Guide 22 and EN45014 Manufacturer s Name Hewlett Packard Ltd Manufacturer s Address bus Queensferry Microwave Division South Queensferry West Lothian EH30 9TG Scotland United Kingdom Declares that the product Product Name Thermistor Power Meter Model Numbers HP 432A
44. CER 6 8 PF 500VDCM CER 0 01 UF 80 20 100VOCW NOT ASSIGNED C FXD C FXD DI ODE DIODE DIODE See introduction to this section for ordering information ELECT 33 UF 10 10VOCh CER 0 05 UF 80 20 100VODCW SILICON 0 75A 200PIV SILICON 0 75A 200PIV SILICON 0 75A 200PIV 0360 0124 0360 0124 0360 0124 0360 0124 0360 0124 00432 6015 0180 1819 0180 0229 TYPE TA TYPE TA 0140 0234 0140 0234 0180 1746 0140 0210 0160 0978 TA 109D227X0008F 2 DYP TA 1090336X9015L2 DYP 1500225X9020A2 DYS 0160 2672 150D225X9020A2 DYS TYPE TA TYPE TA 0160 2150 0180 0229 TYPE TA 0180 0106 150D225X9020A2 DYS 1500225X9020A2 DYS 0180 0106 0180 1714 301 NPO 6 8 PF TA 0180 0229 TYPE TA SRL358 8 SR1358 8 SR1358 8 Section VI Replaceable Parts Model 432A Table 6 1 Replaceable Parts Reference ree Mfr A2CR6 A2CR5 A2CR6 AZCRT A2CR8 A2CR9 A2CR10 A2CR1i A2CR12 AZCR 3 A2CR1 A2CR15 A2CR16 A2CR17 A2CR18 A2CR19 A2CR20 A2CR21 A2CK22 A2CR23 A2Q1 A202 A203 A204 A205 A206 A207 A208 A209 A2010 A2011 A2012 A2019 A2020 A2021 A2022 A2023 A2024 A2025 AZU26 42027 A2028 82029 A2030 42031 A2032 A2033 A2034 42035 A2036 A2037 A2038 42039 A2040 A2041 A2042 A2043 A2044 AZRI AZR2 AZR3 AZR4 A2R5 A2R6 AZRT A2R8 A2R9 A2R10 A2R11 A2R12 A2R13 AZRI4 A2R15 A2R16 A2R17 1901 0026 1901 0026 1902 0509 1901 0026 1901 0026 190
45. D NPN SELECTED NOT ASSIGNED NOT ASSIGNED TSTR SI TSTR SI TSTRISI TSTR SI TSTR SI PNP SELECTED NPN MEN SELECTED NPN SELECTED NPN NOT ASSIGNED TSTR SI TSTR SI TSTR SI TSTRISI TSTR SI NPN LSELECTED NPNI SELECTED NPN NPN FET 30V NOT ASSIGNED TSTRISI FET 30V NOT ASSIGNED TSTR SI TSTR SI TSTR 5SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI NPNI SELECTED NPNISELECTED PNP PNP SELECTED FET 30V NPN SELECTED NPN SELECTED PNP SELECTED PNP SELECTED NPNI SELECTED NPN SELECTED FROM FROM FROM FROM FROM FROM FROM FROM FROM FROM FROM FROM 2N3704 2N3704 2N3702 2N3702 2N3702 2N3704 2N1711 2N1132 2N3704 2N3702 2N3704 2N3704 2N3704 2N3 704 2N3704 2N3704 2N3702 2N3704 2N3704 2N3702 2N3702 2N3 704 2N3T04 R FXD MET FLM 3 16K OHM 1 1 30 RIFXD COMP 6 8 OHM 52 1 4W R FXO MET FLM 6 81K OHM 1 1 2W NOT ASSIGNED RIFXO MET FLM 16 2K OHM 13 1 8w Ri VAR WW IK OHM SI TYPE H 1 R3FXD MET FLM 13 3K OHM 13 1 88 R FXO MET FLM R FXD MET FLM R FXD MET FLM R2FXD MET FLA R FXD MET FLM R FXD MET FLA NOT ASSIGNED R FXD MET FLM R FXD MET FLM R FXD MET FLM 1K OHM 1 1 84 D LE OHM 1 1 8w 100 OHM 1 1 8W 100K OHM 17 1 8w 10 0K 16 2K 10 0K 3 16K OHM 17 1 S3w OHM 17 1 8W OHM 1 1 8w OHM 17 1 8w 100 OHM 13 1 2w See introduction to this section for o
46. D COMPONENTS 9 51 Resistors tubular capacitors and other axial lead components can be replaced without unsoldering Cut the component leads near the body of the defec 5 13 Section V Maintenance Model 432A Table 5 7 Safe Ohmmeter Range for Transistor Resistance Measurements Keel Safe Range s HP 412 HP 427A HP 410C HP 410B R x 1M Simpson 260 R x 100 Triplett 630 A R x 10 Triplett 310 R x 100 tive component remove the component and straighten the leads left in the board Wrap leads of the re placement component one turn around the original leads solder the connection and clip off the excess lead 5 52 OTHER COMPONENTS 5 53 Replace other components as follows a Removedefective component from circuit board Use a low power soldering iron because excessive heat may lift a conductor or damage the board b Removesolder from mounting holes with a suc tion device or a wooden toothpick DO NOT USE A SHARP METAL OBJECT SUCH AS AN AWL OR TWIST DRILL SHARP OBJECTS MAY DAMAGE THE PLATED THROUGH CONDUCTOR c Shape the leads of the replacement component to match the mounting hole spacing Open Circuit Voltage R x 100 1 5 V Rx1k 1 5 V 325 HA 1 5V 1 5V Short Circuit Current Varies with Serial Number d Insert the component leads in the mounting holes and position it as the original was DO NOT FORCE LEADSOF REPLACEMENT COMPONENT INTO MOUNTING HOLES A sharp
47. Errata This manual may contain references to HP or Hewlett Packard Please note that Hewlett Packard s former test and measurement semiconductor products and chemical analysis businesses are now part of Agilent Technologies To reduce potential confusion the only change to product numbers and names has been in the company name prefix where a product number name was HP XXXX the current name number is now Agilent XXXX For example model number HP8648 is now model number Agilent 8648 Ce manuel peut contenir des r f rences a HP ou lt lt Hewlett Packard gt gt Veuillez noter que les produits de test et mesure de semi conducteur et d analyse chimique qui avaient fait partie de la soci t Hewlett Packard sont maintenent une partie de la soci t Agilent Technologies Pour reduire la confusion potentielle le seul changement aux noms de reference a t dans le pr fixe de nom de soci t l o un nom de r f rence tait HP XXXX le nouveau nom de r f rence est maintenant Agilent XXXX Par example le HP 8648 s appelle maintenent Agilent 8648 Diese Gebrauchsanweiseung kann Bezug nehmen auf die Namen HP oder Hewlett Packard Bitte beachten Sie dass ehemalige Betriebsbereiche von Hewlett Packard wie HP Halbleiterprodukte HP chemische Analysen oder HP Test und Messwesen nun zu der Firma Agilent Technology geh ren Um Verwirrung zu vermeiden wurde lediglich bei Produktname und Nummer der vo laufende Firmenname ge ndert Produk
48. H 1901 0040 1901 0040 1853 0020 1853 0020 1853 0020 1854 0071 1854 0071 1853 0001 1854 0221 1854 0071 1854 0071 1854 0071 1853 0001 1854 0221 1854 0071 1853 0020 1853 0020 0698 3260 0686 1055 0698 3160 0698 3160 0698 3160 0698 3156 0757 0465 0698 3136 0698 3441 0757 0401 2100 1770 0757 0439 0698 3449 0757 0461 0757 0443 0698 3162 0811 2284 0757 0199 08 11 2284 0698 3441 06 94 3160 0695 3160 06 98 3156 0757 0465 0757 0401 2100 1770 0757 0461 0811 2284 0757 0199 0811 2284 0757 0199 0698 3260 0757 0289 DIODE SLLICON 30MA 30WV NOT ASSIGNED DIODE SILICON 30MA 30NV TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI TSTR Si TSTR SI TSTR SI TSTR SI TSTR SI TSTR SI PNPISELECTEO FROM 203702 PNP SELECTEO FROM 2N3702 PNP SELECTED FROM 2N3702 NPN SELECTED FROM 2N3704 NPNISELECTED FROM 2N3704 PNP SELECTED FROM 2N1132 NPN REPL BY 2N4044 NPNISELECTEO FROM 2N3704 NPNISELECTED FROM 2N3704 NPNISELECTED FROM 2N3704 PNPISELECTED FROM 2N1132 NPN REPL BY 2N4044 NPNLSELECTED FROM 2N3704 PNP SELECTED FROM 2N3702 PNP SELECTEO FROM 2N3702 RIFXD MET FLM 464K OHM 13 1 8 RIFXD COMP 1 MEGOHM 53 1 2wN R FXD MET FLM 31 6K OHM 12 1 84 R FXD MET FIM 31 6K OHM 1 1 8 R3FXD MET FLM 31 6K OHM 1 1 84 NDT ASSIGNED R FXD R FXD R FXD R FXD R F XD R VAR R F XD N en E IW Fa o R F xD MET FLM L TK OHM 1 1 8W MET F
49. I ou3z 3suvo2 B04 MOLSINUIHL VICO OOOO dee 118 man JO B L IEA A D ASI NaHS Iv Seui Buurg ra I _ 9 WW AL L nale LON I XION3ddY SMILYO XDYE 335 4 Fa WWNDIS wowad334 O 1VNOIS AHVQN023S TYNDIS AUVWI ko m l I swe SHL YA WHOIS 2 ti t09 2 900 I Ss 3A08v ANY vZOlt X1338d VIVIS I XTHW3SSV I OUIZ OLA ot 5 15 be AE men ot 51 750 ww LA gt 710 ind 02 10 ASSY ZV Qi en Kg NOLVSNIINOI A TI ssie 100 H3i 3 idWv isi nn Si TMINIHI44IG z a pew 4 ouaz 303 WIES 220 d MOU 831 19 l Me QOY90333 l n 0200 t59 1 z Hi Adv xvov i K E du K bik TVIANIHISAO P G 1220 958 sta wens a O ZO Bo Art Li au A amp I ADE Ave I Pl Alt ot a e J AZIOI er uoo CH i ege AO 16 Go 9 ANJMANI 39088 i ua L C GE LEN KAP DC I I D I 1 LI 1 I 1 i i LI 4 p GY Z UE ZE Y CTT i I t i k I I I I I I 1 I I I I v MIIA INVE iNOUS NORO ZER ve mem A emp WANIYA War 15 1 WI 384 P G pb cu ADS Alt Alt i MON 335 Alt See Ze 0 i ASSw 2w 01 GO sa 30008 A8 A KA 3 1 39088 weg o UNINI NY are Vd 924 62 WINIA Wap OC 210 ZZ OL A A MBR O 190 220 9 95 I UNE ITIN sio Me RT 1000 1509 SN EA x Gou YAN no AJ m SC Bis AL AL o en C 323uno
50. ION3dd INILVO XIYB 335 OD QUY42Y4 113743H AG 896i HDIWADOS 43490333 Hiyd WNOIS ABYONODIS TWNSIS AUVII A EZ 12 61 1583 ASSv Ze SNOI1VN9IS30 INIVISIY YIddOHI ep Gen u3i 3I dV NOlVNBI1v9 t 6 c0 000 v 8l HILIMS L i TEET Li _ I H N x01 adoos 36008 OI z v 123 22 42M MO Nedo OH AN xc tzu vb su 4vi i2u a2y 0832 010v YBIALLION sine T MOLVMBIALL Mt Ed 9INOMIOJ3 a A 1 00 Zu u O evo pt 20 220 26 suo AGG TENDIS 398WH2 3u AUTLAO SVK lc C C _ oem _r rr _ r _ iLa_ et n n serie Lc U E O ia Ord y 8109 28600 AJBWISSY 21001 H313W V O d 4 6 Section IV Principles of Operation Model 432A Z JO Z PIUS otyeur uos 3urx e ASOT 1939 N VZET TAPOW p b oandij 10398 uotje Jq 1189 88 10 Z1 Paseatoauy SI jndjno qua Jm sda3s l J OSIp ut uled jua Ino AIGA 0 Jotjmdure oi NDEAP33F 9AIJSISIL Sq o1juo2 Spy 10793139 10 9Ej UOI EIGI E Ep 96 9 2t 2 128 b vt HD O 92 wz 020 2 12 81 1142 0 6r dv 9 95 EE i 62 92 122 assy wv vr SNO11VNSIS3Q 39N383394 PLI PUB YHO SEO JO aseq ay 03 103997709 LEO Td no ay WOU SI x98qp394 sui utdurmg JIPiuwa UYOWWOD papedsed 043 0 s o3 andino Sy pue ranjrdure qerjuo19 j1p E SI uor19 s yndut ayy 10 23 9S JONYH ay ut adejonA Depas y BuiAzeA Aq papjoxyuon St pue g g 03 WOU a qeriea
51. LM 100K OHM 12 1 8w MET FLM 17 8K OHM 1 1 8N MET FiM 215 OHM 13 148W MET FLM 100 OHM 13 1 85 WW 100 OHM 5 TYPE H iw MET FLM 6 81K GHA 1 1 8W FOR OPT 013 MET FLM 28 7K OHM 17 1 8W OPT 011 R FXD R3FXO R2FXO MET FLM 68 1K DHM 17 1 8W MET FLM 11 0K OHM 17 1 8W FOR OPT 013 MET FLM 46 4K OHM 13 1 8w OPT 011 K FXD R F XD R FXD NN IK OHM 0 13 1 40W MET FLM 21 5K OHM 12 WW 1K OHM 0 13 1 40 NOT ASSIGNED NOT ASSIGNED RSFXD RIFXD R2FXO R FXD R F XD R FXD R VAR R FXD R F XD RIFXD RsFXD R FXD R FXD R F XD MET FLM 215 OHM 12 1 8W MET FLM 31 6K OHM 17 1 8W MET FLM 31 6K OHM 1 1 8w MET FLM 14 7K OHM 17 1 8wW MET FLA LOOK OHM 1 1 84 MET FLM 100 OHM 13 1 8W WW 100 OHM 5 TYPE H lw MET FLM 68 1K OHM 1 1 8W W IK OHM 0 17 1 40W MET FLM 214 5K OHM 17 1 8uw NW 1K OHM 0 1 1 40W MET FLM 21 5k OHM 13 1 9 MET FLM 464K OHM 13 1 8NW MET FLM 13 3K OHM 12 1 80 FOR OPT 012 See introduction to this section for ordering information FOG1088 FDG1088 1853 0020 1853 0020 1853 0020 1854 0071 1854 0071 1853 0001 1954 0221 1854 0071 1854 0071 1854 0071 1853 0001 1854 0221 1854 0071 1853 0020 1853 0020 0698 3260 EB 1055 0698 3160 0698 3160 0698 3160 0698 3156 0757 0465 0698 3136 0698 3441 0757 0401 2100 1770 0757 0439 0698 3449 0757 0461 0757 0443 0698 3162 0811 2284 0757 0199 0811 2284 0698 3441 0698 3160 0698 3160 0698 3156 0757 0465
52. Mechanical Meter Zero Sets meter suspension so that meter indicates zero To adjust the zero a Turn POWER switch off b Turn the adjustment screw clockwise until the indicator falls below zero and comes back up to zero again c Turn the adjustment very slightly counter clockwise to free up the mechanism from the adjusting peg CALIBRATION FACTOR Amplifier gain compensation selector Set to correspond to the calibration factor printed on the thermistor mount body See paragraph 3 23 for more information MOUNT RESISTANCE Selects resistance equal to that of mount in use to balance bridges Table 1 2 lists Hewlett Packard thermistor mounts and resistances Set with meter power OFF when mount is initially connected to the meter Thermistor Mount Cable Connector Input connector for 5 1 2 foot cable that connects to the 478A 8478B or 486A Thermistor Mounts NOTE The photograph opposite is for illustration purposes only Figure 3 2 Front Panel Controls Connectors and Indicators Sheet 2 of 2 3 5 Section III Model 432A Operating Information N ee ee ee ua Ap AACS nm hihi Hp u GC al RECORDER x BI gie ENEE EE 3 115 230Vt10 48 440 ev ram NUS IR RS NS ER III N Wor n S N S SS SS OS SS SS Ns STD DE Figure 3 3 Rear Panel Controls and Connectors Sheet 1 of 2 Model 432A Line Fuse For 115 Vac or for 230 Vac use 1 8 amp fuse Power Cord Input
53. NG LOSS OF PROFITS WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY Responsibilities of the Customer The customer shall provide 1 Access to the products during the specified periods of coverage to perform maintenance 2 Adequate working space around the products for servicing by Hewlett Packard personnel 3 Access to and use of all information and facilities determined necessary by Hewlett Packard to service and or maintain the products Insofar as these items may contain proprietary or classified information the customer shall assume full responsibility for safeguarding and protection from wrongful use 4 Routine operator maintenance and cleaning as specified in this manual 5 Consumables such as paper disks magnetic tapes ribbons inks pens gases solvents lamps filters fuses seals etc Regulatory Information Model 432A Certification Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members Assistance Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your Hewlett Packa
54. OMP and VRF with power applied 9 3 Section V Model 432A Maintenance NOTES 5 4 Model 432A Section V Maintenance INSTRUMENT SERIAL NO DATE TABLE 5 4 PERFORMANCE TEST CARD Data in this test card corresponds to Performance Tests in Paragraphs 5 16 through 5 20 Section V Model 432A Maintenance TABLE 5 4 PERFORMANCE TEST CARD Para Measurement Ref Test Unit Actual METER ACCURACY 0 01 mW applied measure RECORDER OUT voltage mVdc Meter indicates full scale 0 1 scale divisions Repeat on remaining 432A power ranges Power applied 0 03 mW mVdc Meter indication 0 3 scale divisions Power applied 0 1 mW mVdc Meter indication 0 1 scale divisions Power applied 0 3 mW mVdc Meter indication 0 3 scale divisions Power applied 1 mW mVdc Meter indication 0 1 scale divisions Power applied 3 mW mVdc Meter indication 0 3 scale divisions Power applied 10 mW mVdc Meter indication 0 1 scale divisions CALIBRATION FACTOR Calibration Factor 95 DVM Reading mVdc 88 1000 89 989 90 978 91 967 92 957 93 946 94 935 95 926 96 916 97 907 98 897 99 889 880 Model 432A TABLE 5 4 PERFORMANCE TEST CARD Measurement Unit METER LINEARITY 1 mW applied 3 mW scale meter indicates 1 mW divisions 2 mW applied 3 mW scale meter indicates 2 mW divisions 3 mW applied 3 mW scale meter indicates 3 mW divisions ZERO CARRY OVER Zero carry over Range
55. ON SWwITCHCRAFT INC Tha CAPACITO3 DIV MARTOAK INDUSTRIES RAJIN MATERIALS CO INC See introduction to this section for ordering information 6 9 6 10 Model 432A Section VII Troubleshooting Schematics SECTION VII TROUBLESHOOTING SCHEMATICS AND COMPONENT LOCATIONS 7 1 INTRODUCTION 7 2 This section contains troubleshooting instruc tions schematics and component locations for the power meter Also included is an overall block dia gram that indicates the location of test points in the instrument 7 3 Reference designations shown within circuit card outlines are abbreviated To find the part inthe Parts List use the full reference designation For example R6 on the A2 Meter Logic Assembly is listed as A2R6 7 4 The Schematic Notes in Table 7 1 pertain to all the schematics Additional notes on the schematics indicate test conditions and special information for use when maintaining the instrument 7 5 TROUBLESHOOTING 7 6 Table 7 2 is the Overall Troubleshooting chart for the power meter Procedures for isolating circuit malfunctions to specific stages are based on the use of the HP 8477A Power Meter Calibrator and the cali bration procedures in Section V The information obtained when calibration is attempted is used to troubleshoot the instrument 7 7 Table 7 2 contains references that direct the user tothe detailed troubleshooting charts Tables 7 3 through 7 11 The detailed charts refer
56. PER P O A2 TROUBLESHOOTING CHECK 100K RESISTOR amp 01 CAPACITOR BETWEEN BASE WHERE SQ WAVE IS BAD AND A2TP2 OR COLL Q21 BAD CHECK A2IP2 amp COLLECTOR 021 Ver amp Vcomp MULTIVIBRATOR TROUBLESHOOTING OK CHECK 5KHZ BAD TABLE 7 7 SIGNAL AT AT GATE OF A2TP6 Q30 Q32 BAD CHECK ox 930 032 SERVICE HINT IF TROUBLESHOOTING CHOPPER FOR NOISE LIFT END OF C29 amp C31 AND SEE NOISESPERSISIS 43 Model 432A X ADDED FOR LONG CABLE OPTIONS 11 I2 CR2 GRI R33 R28 Ral d R40 RI7 G9 A Ol AIAI an 3 NI OO c oe Ql4 AUTO ZERO R22 R21 R23 R20 R5 R8 Re CIRCUIT Figure 7 7 Al Bridge Assembly Component Locations RECORDER VcoMP J4 R8 J3 S2 115 230 R6 JS LINE INPUT Figure 7 8 432A Rear Panel Interior Model 432A pan on WSS m Figure 7 11 CRZ CREO Q27 qaqa gas gt res C40 Y 8 645 amp C49 22 A2 Meter Logic Assembly Component Locations Model 432A Appendix I APPENDIX MANUAL CHANGES 22 OCTOBER 2007 Notification Obsolescence of Model 432A 100 The Reason for Obsolete Model 432A 100 Model 432A 101 was obsolete in November 2005 due to parts depletion Replacement product for Model 432A 100 The Model 432A 100 has been replaced with Model 432 101 as this product supports 100 VAC line voltage input Ordering Information Customers should place order for Model 432A 101 instead of Model 432A
57. Product Options This declaration covers only the standard option of the above product Conforms with the protection requirements of European Council Directive 89 336 EEC on the approximation of the laws of the member states relating to electromagnetic compatibility Against EMC test specifications EN 55011 1991 Group 1 Class A and EN 50082 1 1992 As Detailed in Electromagnetic Compatibility EMC Technical Construction File TCF No A 5951 9852 02 Assessed by DTI Appointed Competent Body EMC Test Centre GEC Marconi Avionics Ltd Maxwell Building Donibristle Industrial Park KY11 5LB Scotland United Kingdom Technical Report Number 6893 2200 CBR dated 23 September 1997 Supplementary Information The product conforms to the following safety standards EN 61010 1 1993 TEC 1010 1 1990 A1 1992 A2 1994 CSA C22 2 No 1010 1 93 The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and carries the CE marking accordingly South Queensferry Scotland 17 November 1997 A Gen Location Date R M Evans Quality Manager iv Model 432A Warranty Regulatory Information This Hewlett Packard product is warranted against defects in materials and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product
58. UCTION 3 2 The Model 432A Power Meter operates with HP temperature compensated thermistor mounts such as the 8478B and 478A Coaxial and 486A Waveguide series The frequency range of the 432A with these mounts in 50 ohm coaxial systems is 10 MHz to 18 GHz in waveguide systems it is 2 6 GHz to 40 GHz Full scale power ranges are 10 microwatts to 10 mil liwatts 20 dBm to 10 dBm Extended measure ments may be made to 1 microwatt 30 dBm The total measurement capacity of the instrument is di vided into seven ranges selected by a front panel RANGE switch 3 3 This section describes general operating pro cedures and error analysis in microwave power meas urement Application Note 64 available on request from Hewlett Packard is a detailed analysis of mi crowave power measurement problems and techniques 3 4 CONTROLS CONNECTORS AND INDICATORS 3 4 The front and rear panel controls connectors and indicators are explained in Figure 3 2 The de scriptions are keyed to the corresponding items which are indicated on the figure 3 6 The COARSE ZERO and FINE ZERO controls zero the meter Zero carry over from the most sen sitive range to the other six ranges is within 0 5 When the RANGE switch is set to COARSE ZERO the meter indicates thermistor bridge unbalance and the front panel COARSE ZERO adjust is for initial bridge balance For best results FINE ZERO the 432A on the particular meter range in use 3 7 Th
59. UNT RESISTANCE 2002 8477TA FUNCTION rue eura erac r oes SET 3 Adjust A1R12 OFFSET ADJUST for 0 0 0 1 mVdc reading on the digital voltmeter 4 Change 8477A FUNCTION to CHECK The digital VM reading should not exceed 0 4 mVdc c RF BRIDGE 1 Connect DVM between A1TP3 and A1TP4 using 10K isolation resistors in series with the leads 2 Set 8477A FUNCTION to SET Adjust A1R15 OFFSET ADJUST for DVM reading of 0 0 0 1 mVdc 3 Change 8477A FUNCTION to CHECK The reading should not exceed 0 4 mVdc Note Failure of the instrument to meet the spec ification of steps b 4 and c 3 above in dicates insufficient bridge gain Refer to Tables 7 3 or 7 4 in the troubleshooting section 9 37 METER AND RECORDER OUTPUT CALIB RATION a Connect the DVM to the 432A RECORDER out put b Set 8477A controls as follows FUNCTION 242 ao a tape Uo op a e Sa 20022 ZERO TEST lil n ao ace EA ds ZERO POWER cs een et 1 mW c Set 432A controls as follows A2S1 on Meter Logic Assy CALIBRATE MOUNT RES 2 24 Bi etan de ande ae SES 200 RANGE ze 3519 x oir aar SE OVE To Pe 1 mW CAL FACTOR securea Ed REUS ka 100 Model 432A d Adjust Zero control on 8477A for DVM indi cation of 0 000 001V e ZERO TEST on 8477A to TEST f Adjust A2R6 in 432A for 432A meter reading of 1 0 mW 01 mW g Adjust A2R74 in 432A for DVM reading of 1 0V 001V h Change the following settings
60. able Before operating the equipment ensure that the fuse installed in the instrument corresponds to the value marked on the panel for the line voltage available 1 8 amp slo blow 2 14 INTERNAL BATTERY OPERATION 2 15 Model 432A Option 001 instruments contain an internal battery and a battery charging assembly By connecting the 432A to an ac source the battery may be charged overnight The battery can be maintained in the charging state indefinitely without damage It will assume its full capacity 1 25 ampere hours and will not charge in excess of that This enables the instrument to operate for approximately 20 hours continuously without recharging 2 16 BATTERY INSTALLATION a Set power switch to off and remove power plug from rear panel b Remove top and bottom and side instrument covers c The battery is installed with the terminals toward the right hand side of the instrument when faced from the front The two terminals on the battery fit into spaces provided on the circuit board d Using the retaining nuts fasten the battery firmly in place Be careful not to short the battery terminals at any time as this may cause battery cell damage e Install assembly A7 battery charging board in the space provided for it just ahead of the battery f Reinstall instrument covers and adjust circuit Instrument is now ready for operation 2 17 BATTERY STORAGE 2 18 Store the battery at or below room temperature
61. ad 18 gauge SWG preferred Protective Coat Contamination corrosion ing protection after soldering Krylon Inc Norristown Pennsylvania 5 42 In Circuit Testing In transistor circuit test ing the most important consideration is the transis tor base emitter junction Like the control grid of a vacuum tube this is the control point in the transis tor 5 43 Tocheck a transistor first see if the emitter base diode is forward biased by measuring the volt age difference between emitter and base When using an electronic voltmeter do not measure directly be tween emitter and base there may be sufficient loop current between the voltmeter lead to damage the transistor Instead measure each voltage sepa rately with respect to a voltage common point e g chassis 5 44 If the transistor base emitter junction is forward biased the transistor conducts If the diode is heavily forward biased the transistor saturates However if the base emitter diode is reverse biased the transistor is cut off open The voltage drop across a forward biased emitter base junction varies with transistor collector current A germanium transistor has a typical base emitter voltage of 0 2 0 3 volt with 1 10 mA collector current and 0 4 0 5 volt with 10 100 mA collector current In contrast base emitter voltage for silicon transistors is about twice that for germanium types about 0 5 0 6 volt for low collector current and abo
62. aries during power measurement Since the power that the meter indicates is propor tional to VCOMP and VRF we can cause the meter to indicate a power also by holding VRF constant and varying VCOMP This is easily done on the 432A by turning the COARSE ZERO control Two calibration procedures are given below Full scale readings are not possible on the 10 mW RANGE Full scale read ings are possible on the 3 mW RANGE depending on the mount characteristics 5 24 CALIBRATION PROCEDURE 1 a Connect thermistor mount to power meter let instrument warm up for at least ten minutes b Selectrange whichinstrument is to be calibrated on Note Ranges below 0 3 mW require a precise differential voltmeter capable of resolv ing 1 uV The HP 740B DC Standard A Voltmeter which has an accuracy of 0 005 of reading 0 0004 of range 1 uV is recommended A digital volt meter is adequate for the 1 0 mW and higher ranges c Connect Differential Voltmeter or DVM differ entially between the VCOMP and VRF output jacks on the rear panel See Figure 3 3 for location of VRF and VCOMP outputs d While pressing the FINE ZERO switch meas ure and record Vo Vo is the difference of the bridge voltages with no power applied e Turn COARSE ZERO control on front panel clockwise to a convenient power e g 9 on the 0 to 10 scale or 2 on the O to 3 scale f Differentially measure and record Vj Vi is the difference voltage between VC
63. circuit board h Place the modification decal on the top center of the front panel i This completes the modification Install the Al and A2 boards back in the instrument Perform the adjustment procedures in Section V of this manual with the long cable POST SALES SUPPORT ADDRESS LISTo If you need technical assistance with a Hewlett Packard test and measurement product or application please contact the Hewlett Packard office or distributor in your country Asia Pacific Hong Kong 852 2599 7889 India 91 11 682 6000 Japan Hewlett Packard Japan Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan Tel 81 426 56 7832 Fax 81 426 56 7840 Korea 82 2 769 0800 Malaysia 60 3 291 0213 Philippines 63 2 894 1451 PRC 86 10 6505 0149 Singapore 1800 292 8100 Taiwan 886 3 492 9666 Thailand 66 2 661 3900 For countries in Asia Pacific not listed contact Hewlett Packard Asia Pacific Ltd 17 21 F Shell Tower Times Square 1 Matheson Street Causeway Bay Hong Kong Tel 852 2599 7777 Fax 852 2506 9285 Australia New Zealand Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia 1 800 629 485 October 2007 Canada Hewlett Packard Canada Ltd 5150 Spectrum Way Mississauga Ontario L4W 5G1 905 206 4725 Europe Africa and Middle East Austria 0 1 25000 0 Belgium and Luxembourg
64. comp VRF g Measure Vcomp to ground h Calculate incident RF power from the equation gt 1 2 _ aR Ycoup Vi Vo Vo Yi P RF EFFECTIVE EFFICIENCY where R is the thermistor mount resistance 3 3 Section III Model 432A General Information 432A POWER METER ip HEWLETT PACKARD FINE ZERO mW RANGE 48m Figure 3 2 Front Panel Controls Connectors and Indicators Sheet 1 of 2 3 4 Model 432A POWER Instrument power ON OFF switch connects either ac line voltage or internal battery Option 01 only to internal voltage regulator circuits When ac power is on optional battery charging circuit operates COURSE ZERO Meter zero adjustment set the RANGE selector to COURSE ZERO turn OFF the RF power and adjust to zero the meter RANGE Power measurement range selector selects ranges from 0 01 to 10 milliwatts 20 to 10 dBm COURSE ZERO setting is used to zero meter with no power applied to thermistor mount FINE ZERO Electronic zero that balances the compensation bridge with zero RF input To zero meter during operation close the switch momentarily Be sure that RF power is not applied to the thermistor mount when the FINE ZERO switch is depressed Meter Indicates power input to thermistor mount in milliwatts and dBm To use the dBm scale note the value in dBM of the range in use and subtract from it the reading on the meter dBm scale Section III Operating Information
65. d OBD internal OH kilo 1000 ox left hand um linear taper PF lock washer logarithmic taper PH BRZ low pass filter PHL Dm di PIV milli 1073 meg 106 PNP metal film metallic oxide Lis manufacturer PORC mega hertz PO miniature or momentary pp mounting PT ta tr mylar PWV nano 1079 RECT normally closed RF neon RH nickel plate 4 nou H ll H H u H It n H H H HUH n H n H oM bob n n H Hh H mechanical part plug transistor resistor thermistor switch transformer terminal board test point normally open negative positive zero zero temperature coefficient negative positive negative not recommended for field replacement not separately replaceable order by description oval head oxide peak printed circuit picofarads 10712 farads phosphor bronze Phillips peak inverse voltage positive negative positive part of polystyrene porcelain position s potentiometer peak to peak point peak working voltage rectifier radio frequency round head or right hand NKx lt RMO RMS RWV S B SCR SE SECT SEMICON SI SIL SL SPG SPL SST SR STL TA TD TGL THD TI TOL TRIM TWT U VAR VDCW W w WIV Ww w O W wow uw n DU ti H H Hf l H H H H MW H ti Wou H Hu H M t a H Hu d H I vacuum tube neon bulb photoceil etc voltage regulator cable socket crystal tuned cavity network rack mount only root mean square revers
66. d circuit board eyelets in which A1R32 and A1R42 are to be placed by referring to Figure 7 7 Note that one end of these resistors will be placed inside the guard rings that attach to the bases of A1Q12B and A1Q7B There is a vacant eyelet provided inside the guard rings to make this connection c Install the correct value A1R32 and A1R42 for the desired option d Place the 432A on its top Figure 7 5 re veals the location of bridge resistors R3 and R5 on terminal strip XAl Select the proper values of re sistors R10 and R11 from the option kit Solder R11 across pins 3 and 5 of XA1 in parallel with R5 and solder R10 across pins 6 and 8 of XA1 in parallel with R3 e Locate the MOUNT RESISTANCE switch S3 on the back of the front panel Bridge resistors R2 and R4 are wired to the rear o S3 AII 2 Model 432A see Figure 7 6 Choose the resistors supplied with the option kit for R12 and R13 Solder R12 across R2 and R13 across R4 f Capacitor C2 2 2 uF is connected across the rear of the FINE ZERO switch S4 see Figure 7 6 With the instrument resting on its top wire the positive lead of C2 to the terminal of S4 with the white black violet 907 wire and the negative lead to the terminal with the violet 7 wire g Remove the A2 Meter Logic Board A2C45 by referring to Figure 7 11 Remove the 60 uF capacitor and replace it with the 300 uF capacitor supplied with the option kit Observe the polarity as marked on the
67. e 2 2 The frame will accept a variety of submod ular units in a manner suitable for rack mounting Submodular units in combination with any necessary spacers are assembled within the frame A submod ular unit cannot be removed individually 2 25 REPACKING FOR SHIPMENT 2 26 When returning an instrument to Hewlett Packarduse the original packing material If the orig inal foam type packing material is not available con tact an authorized HP Sales Office for assistance If this is not possible first protect the instrument sur faces by wrapping in heavy kraft paper or with sheets of cardboard flat against the instrument Protect the instrument on all sides using approximately 4 of packing materialandpack in a durable container Mark the container clearly for proper handling and insure adequately before shipping 2 27 When an instrument is returned to HP for ser vice or repair attach a tag to the instrument specifying the owner and desired action All correspondence should identify the instrument by model number and full eight digit serial number PUSH RETAINER DOWN TO RELEASE SLIDE INSTRUMENT INTO CASE TO SET RETAINER BACK IN PLACE ENGAGE HOOKS FIRST ON ONE SIDE OF DIVIDER THEN ON OTHER PUSH RETAINER UP TO LOCK 415 C 2 Figure 2 2 HP Model 1051A Combining Case Instrument Installation Model 432A Section III Operating Instructions SECTION Ill OPERATING INFORMATION 3 1 INTROD
68. e CALIBRATION FACTOR switch provides discrete amounts of compensation for measurement uncertainties related to SWR and thermistor mount efficiency The Calibration Factor value permits di rect meter reading of the RF Power delivered to an impedance equal to the characteristic impedance Zo of the transmission line between the thermistor mount and the RF source Calibration Factor values are marked on the label of each 8478B 478A or 486A Thermistor Mount For further details see Para graph 3 23 3 8 The MOUNT RESISTANCE switch on the front panel compensates for three types of thermistor mounts Model 486A waveguide mounts can be used by setting the MOUNT RESISTANCE switch to 10022 or 2008 depending on the thermistor mount used refer to Table 1 2 The 2002 position is used with Models 478A and 8478B Thermistor Mounts 3 9 The rear panel BNC connected labeled RE CORDER provides an output voltage linearly propor tional to the meter current 1 volt into an open cir cuit equals full scale meter deflection This voltage is developed across a 1K resistor therefore when a recorder with a 1K input impedance is connected to the RECORDER output approximately 5 volt will equal full scale deflection This loading of the RE CORDER output has no effect on the accuracy of the 432A panel meter 3 10 A digital voltmeter can be connected to the rear panel RECORDER output for more resolution of power meter readings When a voltmeter with i
69. e wave current with amplitude proportional to VCOMP VRF Model 432A 4 15 The VCOMP VRF signal is obtained by tak ing the two dc voltages from Al assembly through a summing circuit and feeding this voltage to a voltage to time converter The voltage to time converter is driven by a 5 kHz multivibrator The output of the voltage to time converter is a signal whose pulse width is proportional to the sum of VCOMP VRF This signal controls the electronic switch From the VCOMP VRF and VCOMP VRF inputs the elec tronic switch provides a 5 kHz pulse train whose am plitude is proportional to VCOMP VRF and whose pulse width is proportional to VCOMP VRF The pulse width is always 90 msec or less 4 16 The bias circuit switch and filter provides a zero current reference for the meter circuits This isaccomplished by controlling the dc bias to the first stage of the calibration factor amplifier This cir cuit in effect restores the dc component to the square wave which has been amplified by ac coupled amplifiers 4 17 The meter is a 0 1 mA full scale meter that has a capacitor across its terminals The capacitor integrates the output pulses from the current switch so the current into the meter is proportional to the time average of the input pulses That is the input current to the meter is proportional to the product of V V comp Vrr Vcomp VRF 2 2 Vcomp Vnr 4 18 The output from the meter is
70. e working voltage slow blow screw selenium section s semiconductor silicon silver slide spring special stainless steel split ring steel tantalum time delay toggle thread titanium tolerance trimmer traveling wave tube micro 10 6 variable dc working volts with watts working inverse voltage wirewound without 6 1 Section VI Replaceable Parts Model 432A Table 6 1 Replaceable Parts Reference up Part Number Oty Mfr Part Number Ade n Designation Descripti 00432 60024 BOARD ASSY BRIDGE 00432 60024 00432 6011 ASSY AUTO ZERO 00432 6011 0180 0374 C FXD TANT 10 UF 107 20V0CH 150D106X902082 DYS 0160 2055 C FXD CER 0 01 UF 80 20 LOOVOCH COZ23F101F 103Z S22 CDH 0160 2055 C FXD CER 0 01 UF 80 203 100VDCW C023F101F103Z522 CDH 0160 0380 CiFXD MY 0 22 UF 10 200VO0CH 0160 0380 0160 2055 CIFXD CER 0 01 UF 80 20 100VDCW C023F101F1037522 CDH 0160 2055 CsFXD CER 0 01 UF 80 20 100VDCN COZ23FIGIF103Z S22 CDH 0160 2055 C FXD CER 0 01 UF 80 20 100VDCW CO23F1Q1F LO3Z 22 C0H 0160 0380 C FXD MY 0 22 UF 103 200VDCW 0160 0380 0160 2055 C FXD CER 0 01 UF 80 20 100VDCW 0160 3459 C FXO CER 0 02 UF 202 100VDCN 0160 3459 CsFXO CER 0 02 UF 203 100VDCW 0180 0374 C FXD TANT 10 UF 10 ZOVDCW 0160 2055 C FXO CER 0 01 UF 80 20 LOOVOCH C023F101F1032522 CDH C023F101H203M522CDH C023F101H203MS 22C 0H 1500106X902082 DYS C023F101F1032S22 CDH 0160 2055 C FXD CER 0 01 UF 80 20 LOOVDCH C023F101F1032522 CO
71. ecommended thermistor mounts and their frequency ranges Meter Mechanical Zero a With the instrument turned off rotate the meter adjustment screw clockwise until the pointer approaches the zero mark from the left b Continue the clockwise rotation until the pointer coincides with the zero mark If the pointer overshoots continue rotating the adjustment screw clockwise until the pointer once again approaches the zero mark from the left c Rotate the adjustment screw about three degrees counterclockwise to disengage screw adjustment from the meter suspension Set the MOUNT RES switch to correspond to the operating resistance of thermistor mount used Turn the 432A POWER switch ON For battery operation the AC LINE indicator does not turn on Section III Operating Information Set RANGE selector to COURSE ZERO and then zero the meter with the COURSE ZERO screwdriver adjustment Note The power meter should be zeroed with the RF power source turned off or the mount disconnected from the source Set the range selector to the 0 01 mW range then depress the FINE ZERO switch until the meter indicates zero Note Range to range zero carryover is less than 0 5 if the meter zero has been adjusted step 2 above and the instrument has been properly zero set on the sensitive range For maximum accuracy zero set the power meter on the range to be used Set CALIB FACTOR switch to correspond to Calibration Fac
72. ed on rear panel instead of front Note Thermistor mount cable impedance is part lisi feels of the 432A input bridge circuit For cables To 53 uso e 20 feet long and over the bridge is matched to specific cable options so the various Accessories Furnished 5 ft 1 42 m cable for HP cables should not be interchanged temperature compensated thermistor mounts 7 TS I _ 1 2 ft 2 29 m power cable NEMA plug a 3 05 m cable for 100 ohm or 200 010 20 foot 6 10 m cable for 100 ohm or 200 ohm mount 011 50 foot 15 24 m cable for 100 ohm or 200 ohm mount Accessories Available 00432 6016 Rechargeable Battery Pack for field installation 5060 0797 Rack Adapter Frame holds three in l struments the size of the 432A 012 100 foot 30 48 m cable for 100 ohm or 200 ohm mount 84714 Power Meter Calibrator 013 200 foot 60 96 m cable for 100 ohm or 200 11076A Carrying Case ohm mount Table 1 2 Thermistor Mounts for the 432A HP Model Frequency Range GHz Operating Resistance Ohms COAXIAL MOUNTS 478A Type N Connector 200 8478B Type N Connector 200 8478B Option 11 APC 7 Connector 200 WAVEGUIDE MOUNTS S486A G486A J486A H486A X486A M486A P486A K486A R486A WAVEGUIDE MOUNT ACCESSORIES 11515A Circular Flange Adapter for K486A 11516A Circular Flange Adapter for R486A 1 2 Model 432A 1 7 OPERATING ENVIRONMENT 1 8 This instrument
73. er Components 5 14 4 1 Simplified Description 4 1 4 5 Functional Block Diagram 4 1 VI REPLACEABLE PARTS 6 1 6 1 Introduction 6 1 V MAINTENANCE 5 1 6 3 Ordering Information 6 1 9 1 Introduction 5 1 e E e EE 5 1 VII TROUBLESHOOTING SCHEMATICS 5 4 Performance Tests 5 1 AND COMPONENT LOCATIONS 7 1 5 6 Adjustments 5 1 7 1 Introduction 7 1 5 10 Test Equipment 5 1 7 5 Troubleshooting 7 1 5 12 Service Information 5 1 7 8 Schematces o 7 1 7 12 A1A1 Auto Zero Assembly 7 1 7 14 Test Conditions 7 1 11 Model 432A List of Tables List of Illustrations LIST OF TABLES Number Title Page Number Title Page 1 1 Specifications 1 1 T 2 Overall Troubleshooting 1 5 1 2 Thermistor Mounts for the 432A 1 2 7 3 RF Bridge Troubleshooting 7 6 5 1 Recommended Test Equipment 5 0 14 Compensation Bridge Troubleshooting 7 6 5 2 Meter Accuracy Test 5 2 7 5 Auto Zero Troubleshooting 1 7 5 3 Calibration Factor Test 5 2 7 6 Chopping and Summing Circuit 5 4 Performance Test Card 5 5 Troubleshooting 1 7 5 5 Out of Circuit Transistor Resistance 17 5 kHz Multi
74. espond ing position indicated in Column 2 of Table 5 2 In each case the meter indications should correspond to those shown in Table 5 2 Columns 3 and 4 9 17 CALIBRATION FACTOR TEST a Set 432A controls as follows A2S1 on Meter Logic Assy CALIBRATE RANGE adas 22 23453 Lear 0 1mW CAL FAC TOR amp 5 ud n ers ai 88 MOUNT RESISTANCE 20022 b Set 8477A controls as follows FUNCTION ria vie ee ee ar 2002 ZERO TEST Switch TEST POWER mW 0 1 mW c Set 8477A ZERO control so that the digital volt meter reads 1000 2 mV d Set the calibration factor selector to 89 e The digital voltmeter should indicate 989 10 millivolts f Repeat steps d and e for each position of the CALIBRATION FACTOR selector In each case the digital voltmeter should indicate the voltage shown in the second column of Table 5 3 for the CALIBRATION FACTOR shown in the first column 5 2 Mode1 432A Table 5 3 Calibration Factor Test Digital Voltmeter Indication mV 1000 2 Calibration Factor Selector Setting 989 10 978 10 967 10 957 10 946 10 935 10 926 10 916 10 907 10 897 10 889 10 880 10 2 18 METER LINEARITY CHECK a Set the 8477A POWER MW selector to 1 mW and FUNCTION to 2002 ZERO TEST switch to TEST b Set the 432A RANGE selector to 3 mW MOUNT RESISTANCE to 2002 c The 432A meter should indicate
75. he 01 mW range 5 20 FINE ZERO RANGE CHECK a Set the 432A RANGE selector to 0 3 mW Leave the thermistor mount connected to the cable and the MOUNT RESISTANCE selector set to correspond to the resistance of the mount used b Depress the FINE ZERO switch c Slowly turn the COARSE ZERO screwdriver adjustment counterclockwise until the meter will no longer zero The FINE zero circuit is at one end of its range d Release FINE ZERO e Set the COARSE ZERO screwdriver adjustment so that the meter indicates full scale on the 0 3 scale 0 3 mW range Section V Maintenance f Depress FINE ZERO switch the fine zero cir cuit is at the other end of its range Meter should indicate below 2 on the 0 3 scale Record the indi cation g Release FINE ZERO h Rotate RANGE switch to COARSE ZERO posi tion The fine zero circuit is now in the center of its range The meter reading shouldbe 1 5 1 2 reading of step f 0 1 div on the 0 3 scale 5 21 432A CALIBRATION WITHOUT 8477A CALI BRATOR 9 22 The 432A Power Meter can be calibrated with out an 8477A Calibrator using a method similar to the precision power method outlined in Paragraph 3 27 9 23 A major difference between the two measure ments is that external power need not be applied when calibrating the instrument Normally in a stable en vironment the VCOMP output voltage remains con stant not being affected by external RF power only the VRF output v
76. is designed for indoor use only 1 9 The module may be operated at temperatures from 0 C to 55 Cataltitudes of up to 4 600 m 15 000 ft The module may be operated in environments up to 95 relative humidity to 40 C but it should be protected from temperature extremes which may cause condensation 1 10 To ensure adequate cooling do not obstruct air vents in the instrument cabinet 1 11 COOLING REQUIREMENTS 1 12 To provide adequate cooling an air gap of approximately 75 mm should be maintained around the instrument NOTE If the HP 432A is subject to HP Class B condensation it is recommended that the instrument be powered up for at least 30 minutes before normal operation is possible CAUTION This instrument is designed for use in Installation Category II and Pollution Degree 2 per IEC 1010 1 and 644 respectively 1 13 CLEANING 1 14 To clean the module instrument Use a soft clean damp cloth to clean the front panel and side covers CAUTION CAUTION WARNING WARNING WARNING WARNING Section I Mains supply voltage fluctuations should not exceed 10 of the nominal selected line voltage Before switching on this instrument make sure that the line voltage slide switch is set to the voltage of the power supply and the correct fuse is installed see Figure 3 3 Ensure the power supply voltage is in the specified range Appliance coupler mains input powercord is the power disconnect device
77. l 5 27 COVER REMOVAL AND REPLACEMENT 5 28 The side covers can be removed and replaced independently of the top and bottom covers Each side cover is held in place by four screws retained by nuts which are fastened to the side frames 5 29 TOP COVER REMOVAL a At therearof the instrument remove the screw that retains the cover b Grasp the cover from the rear and slide it back 1 2 inch Then tilt forward edge of the cover upward and lift the cover from the instrument 9 30 TOP COVER REPLACEMENT a Rest the cover flat on the cast guides project ing inward near the top of each side frame b Slide the cover forward allowing its forward edge to enter the groove in the front panel c Replace the cover retaining screw 9 31 BOTTOM COVER REMOVAL a Remove the retaining screw at the rear of the cover b Swing the tilt stand out to free the cover c Slide the cover rearward far enough to free the forward edge d Tilt the forward edge of the cover upward and lift the cover from the instrument 9 32 BOTTOM COVER REPLACEMENT a Set the tilt stand out of the way of the cover b Rest the bottom cover flat on the case guides projecting inward near the bottom of each side frame c Slide the cover forward on the guides so that the formed portion at the rear of the cover slides over the two short projections at the rear corner of each side frame d Replace the retaining screw 5 9 Section V
78. laminate After the Auto Zero assembly is replaced perform the adjustment pro cedure given in Section V 7 14 TEST CONDITIONS 7 15 For mosttests of circuit operation when trouble shooting the instrument the troubleshooting charts call out control settings In special cases notes on the schematics indicate control settings required to measure voltage levels in circuits Generally the following control settings should be selected and changed only as the troubleshooting procedures indicate RANGE sng ad deg balena dia 3 mW 5 dBm MOUNT RESISTANCE 200 Mount installed CALIBRATION FACTOR VE PECE 100 COARSE ZERO turn until meter is at full scale 7 1 Section VII Model 432A Troubleshooting Schematics Table 7 1 Schematic Notes 1 Resistance in ohms capacitance in microfarads unless otherwise indicated 2 O Strewdriver adjustment O Front panel control 3 Front panel designation PT E 8 Rear panel designation 4 Printed circuit card border Main signal path Secondary signal path Secondary feedback path 5 P O part of 6 z Wiper moves toward CW when control rotated clockwise de Test point Number in circle matches number on printed circuit card 9 de Tunnel diode 10 Wire color code Numerical color code same as resistor coding For example Breakdown diode 947 denotes white yellow violet wire XAI l 11 gt Kaes Indicates
79. lockwise until pointer approaches zero mark from the left 2 Continue rotating clockwise until pointer coincides with zero mark If pointer over shoots continue rotating adjustment screw clockwise until pointer once again ap proaches zero mark from the left 3 Rdate adjustment screw about three de grees counterclockwise to disengage screw adjustment from meter suspension 9 16 METER ACCURACY TEST a Set the 8477A Calibrator controls as follows POWER MW 0 01 mW FUNCTION 3 4 Z den d alone a a 2002 ZERO TEST o sek tbe ar Pt ZERO b Set the 432A controls as follows A2S1 on Meter Logic Assy CALIBRATE MOUNT RESISTANCE 2002 RANGE dalia uu S rek oce AE 0 1 mW POWER zo ru eil a ei ON CALIBRATION FACTOR 100 c Adjust 8477A ZERO knob for 0 volts 2 mV in dication on the DVM 5 1 Section V Maintenance Table 5 2 Meter Accuracy Test Digital Voltmeter Indication milli Indication Full volts 10 mV scale 1 2 Div d Set the 8477A controls as follows POWER MW l yo tava is d 0 01 mW ZERO TEST ui ata pa awa w a usa TEST e The digital voltmeter should indicate 1000 10 millivolts f The 432A meter should indicate full scale 1 2 division g Repeat steps d through f for each of the other ranges Set the power meter range selector to the position indicated in Column 1 of Table 5 2 and set the 8477A meter reading selector to the corr
80. mW Scope Indication 01 0 5 mVdc 03 0 5 mVdc 1 0 5 mVdc 0 5 mVdc 0 5 mVdc 0 5 mVdc 0 5 mVdc FINE ZERO RANGE Meter indication on 0 3 scale divisions Meter indication on 0 3 scale 1 5 1 2 reading divisions of step f 0 1 div Section V Maintenance Section V Model 432A Maintenance NOTES 5 8 Model 432A g Measure and record VCOMP Note that the VCOMP jack is isolated from chassis ground meas ure from the center conductor of the BNC to the outer conductor h Calculate the power using the following formula a AN a P aR 2 Vcom Yi Vo Vi 1 where R is the resistance of the thermistor mount and should be identical to the setting of the MOUNT RESISTANCE switch i If calculated power is different from the value that was set with the COARSE ZERO control adjust A2R6 so that the meter reads calculated power If the range of A2R6 is insufficient to set new power it will be necessary to change the value of A2R70 j Set COARSE ZERO so that meter reads 1 on the 0 to 1 scale Set A2R72 for 1 000V 10 mV at the RECORDER output jack on the rear panel 9 25 There is a simpler form of the equation that was used to calculate power in step h above This form ignores Vo the small voltage difference between the two bridges with no power applied However VO becomes negligible on the higher ranges that is 1 mV and above and can be ignored with little decrease in accuracy The simple
81. n accordance with publication EN61010 1 1993 IEC 1010 1 1990 A1 1992 A2 1994 CSA C22 2 No 1010 1 1993 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use and has been supplied in a safe condition The instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the instrument in a safe condition vi Model 432A General Safety WARNING Regulatory Information The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Hewlett Packard Company assumes no liability for the customer s failure to comply with these requirements This is a Safety Class I instrument provided with a protective earthing ground incorporated in the powercord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside of the instrument is likely to make the instrument dangerous Intentional interruption is prohibited DO NOT operate the product in an explosive atmosphere or in the presence of flammable gasses or fumes DO NOT use repaired fuses or short circuited fuseholders For continued protecti
82. nced due to incorrect thermistor resistance an error voltage occurs and is amplified by the bridge amplifier The error voltage is applied to the top of the bridge and changes the power dissipation of the negative temperature coefficient thermistor The change of power dissipation causes the resistance to the thermistor to change in the direction required to balance the bridge Application of RF power to the RF bridge heats ihe thermistor and lowers its resist ance The bridge circuit responds by reducing the dc voltage applied to the topof the bridge thus maintain ing bridge balance 4 8 If ambient temperature causes changes in the thermistor resistance the bridge circuits respond by applying an error voltage to the bridges to main tain bridge balance The voltage at the top of the RF bridge is dependent upon both ambient temperature and the RF input The voltage at the top of the com pensation bridge is dependent upon the ambient tem perature only The power meter reading is brought to zero with no applied RF power by making VCOMP equal to VRF so VCOMP VRF equals zero Since ambient temperature causes both thermistors to re spond similarly there will be no net difference be tween the amplifier output voltages Therefore any difference in output volrages from the bridges is now due to RF power absorbed by the thermistor mount 4 9 The RF bridge voltage VRF and the compen sation bridge voltage VCOMP contain the RF power
83. nput impedance greater than 1 megohm is connected to the RECORDER output 1 volt equals full scale deflec tion 3 11 The 432A has two calibration jacks VRF and Vcomp on the rear panel that can be used for pre cision power measurements Instrument error can be reduced from 1 to 0 2 of reading 5uW of reading depending on the care taken in measurement and on the accuracy of auxiliary equipment For fur ther information see Paragraph 3 27 3 12 BATTERY OPERATION 3 13 The Model 432A Option 001 instruments contain tery and conventional 115 or 230 volt line power A rechargeable Nickel Cadmium battery is factory installed in Option 01 instruments The same battery can be ordered and later installed on the basic instru ment thereby modifying the power meter to the Op tion 01 configuration The battery installation kit HP part number 00432 6016 including battery charg ing circuit may be ordered from the nearest HP Sales Office 3 14 It is recommended that the Model 432A be battery operated for up to eight hours and then al lowed to recharge eight hours or overnight Contin uous battery operation is possible for up to about 20 hours but then the battery must be recharged for about 20 hours 3 15 The 432A automatically operates on its inter nal battery whenever the acline poweris disconnected and the POWER switch is ON When the battery ter minal voltage decreases far enough to force the power supply voltage
84. nxoudde oj IU dWOOA Aq 95 948 ay WOA SIBARYI jt IUM LZ JJO SPIOY yorum duel Ieaury e Burjetoua3 028 aoInos juod In3 niqj saBfeyo GZO L4Z Jo Sum mn TUA 622 Jo sapis yog puno19 oy AUA WODA S1JOUS aduepadut mo sy paejganjes 9z UM DIA dWODA 01 sadzeyo czo jo 1no ST 920 USUM 10je1qrArjnur ay JO 33895 ay uo Burpu d p Pajeanyes 10 JJO MI reyjre SI 970 Q91IAS 9 wnunxeu 34 Sdweto jeudis ay wouj aseyd Jo 1n0 081 SI jndjno 9AEM atenbs ayi o LR KU HILY 000 tS BI S 0A O je 943 JANNISOd ANmouo FUIY9ZIMS rayjo BALIP 0 aseyd jo yno 087 pasn ate smd ano ujog A I 91 A9 aAeM o1enbs 304 1 Y SI ndyno y JojezrqrAnjQU ZH S 31Q2 SE UB WIO 66 pur 228 JOJEIQIUATITMA YIOTD Ait YOLVIBIALIINW HAS tuo PSB UD 520 wol nD 0j uoe Injes WOJJ UAALIP SI ZO Jarjijduy JAZ 9 andwa w 20 220 AY dWOO Jo apnardwe ou yim SILIBA Anourwas sp pue ZH3 6 9381 002 SI aAEMm Styi Jo polr d ayi 625 SIINO 1343391 LVaH DHIAH S9JEDIPUI 19391 ay OS A9 01 S203 adejon Ajddns 197390 paBIeyYosip si Azapeq ay uaym SHUN IO uondo 104 paseiq youq Ap zw TOU SI SIYI 676 Wouj as nd JALIP ay jo uorje1np 31 10 PNITIJ Jayaw ay 07 JAIJiIAdWE 10329 UOTJBIQUEJ tuodj qUaTINI yndyno SAUYINIMS pp YINMS 2100432913 JO 10129 02 ay W SAM Jemur e Se sarawa LZ jo aseq ay o parpdde
85. on against fire replace the line fuse s only with fuse s of the same voltage and current rating and type DO NOT perform procedures involving cover or shield removal unless you are qualified to do so Operating personnel must not remove equipment covers or shields Procedures involving the removal of covers and shields are for use by service trained personnel only DO NOT service or adjust alone Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock service personnel must not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this product have been impaired either through physical damage excessive moisture or any other reason REMOVE POWER and do not use the product until safe operation can be verified by service trained personnel If necessary return the product to a Hewlett Packard Sales and Service Office for service and repairto ensure the safety features are maintained DO NOT substitute parts or modify equipment Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the product Return the product to a Hewlett Packard Sales and Service Office for service and repair to ensure the safety features are maintained
86. onpuoo ZEB uaym JUA spenba 94 LZY Je 19491 qua Tino aineZou e SI gp ao4dnos 3uaJJmo Ind AJ Ms 2 0 yeusis ayy dWODA sqenba 9d L ye 949 yeusis au 3unonp Si l jno ay SI 2 P6 pue Jorjr duig 1333119 UOUIUIOI 1400 zd i uoo uou ZEB syonpuoo OC uayM TEURS JTOJLIQUANNW ZHX S St pO NINO 1839UI ayi JALIP ey sosqnd beb Ses ayy Aq Afajeuteje paje1edo aae 184 SIYIJIMS 918 ZE pue DE o ET ze ED 0 d Kc I sou A J9AO JIEO OJaz poo SApIaoId 1949 SPIQ JO juounsnipe si paonpal st Zp uio Juano ay put ZO PUE IPOD GED uo serq ay sISnIpe adreyo SIUL BED SA3IPYI pue ge nay pajunus St p amp a39INOS quarino Aq UMEIP juaJJno Jey Jo SSIOXI ut gp WOL ZUMOJ juatamo penpisau Auy JJo pauan SI pp UIYA sjonpuoo YE YoPAS jmon serg V Tl 96 jnoqe uey 19378313 SQUAI In3 I3j8ui 10 LH Sossed q pIHI UO1793 J9P Jam 3 Y9S Nj ye POA I 10 INALNO HSOHOOSMH 94 2384Q 1180 PLY 19311 ssed Ao e uro bbI pue p2 LM AUA dWODA 44 TINOI a o3 peuonsodoad si qua lano 10 9U jzey os Sasynd zuazino ay SIAL Zp AOpoedvs TO LIBIJU 1200 S8t bed qUIIINI yndjno 03 ses nd ageyon mdur sjraAuoo qey Jerjridure enuarazzip ULIO OPH pue EEO 42 AMOS a 03 yenba yunowe ue Aq saneS3ou patind ate Janrpdury yoeqpasy vi sanjeA YAL se qo se TUA dINOOA jo santea mot 103 ram Ap enbo soje1odo Ja IaAUu0J autj o a3ej10A Wy os pajsnipe st 98H CASTZI Afajew
87. pins 2 and 4 must be shorted at the mount end of the cable This short can be accomplished with an 11527A Adapter available from Hewlett Packard The 11527A connected between the mount and the cable can be removed for instrument operation with an un balanced mount NOTE If a 432A has been modified for a particular cable option it is incompat ible with all other cable lengths AII 6 The parts required for the modification are listed in Table 6 1 and shown on the appropriate Service Sheet AII 7 OPTION 009 INSTALLATION AII 8 Option 009 10 foot cable requires no modification to the 432A Power Meter The longer cable is substituted for the standard five foot thermistor cable AII 9 OPTION 010 INSTALLATION a Remove the right side and top covers from the 432A Remove the A1 Bridge Assembly circuit board from the instrument b Referring to Figure 7 7 locate the board position where A1R42 is to be placed Install the 261K 1 0 125W resistor supplied with the kit in that position c Place the modification decal on the top center of the front panel d This completes the Option 010 installa tion Before replacing the top and side panels connect the ten foot cable and perform the bridge amplifier adjustments in Section V of this manual AII 1 Appendix II AII 10 OPTION 011 THROUGH 013 INSTAL LATION a Remove both side top and bottom covers Remove the A1 Bridge Assembly b Locate the printe
88. q pinto Are JOu St HO Z JO quarIno aseq au 0 1JUO9 03 p Wouj eudts 10113 y sanmdwe 1 OTA qua rino au jur 0 pwe jjo Z uan 0j spuaj yory CH nig yu 06 noqg sp o X UleIp qua rino ji uo SUINI ITO UIHAS uot1991024 WOLINIISAO ANNI 3Ni FH 006 0 AO Zeg LVE DHOJU 4389 Iput YIJYA qaza ay 0 quarino Ape dou sanddns pue 1rappiidwe 10308 uonegaqtreo ou jjo SUIN SIYL Sajeanjes f HUN atout uo gun 66 uoma jo mo sdoup Arddns Jamod ayy 10 pa3reyos p si Aquo spun 10 vondo A1ezeq au y 330 Ayyews0U SI Ed YOUMS Section V Model 432A Maintenance Table 5 1 Recommended Test Equipment Instrument Type Critical Specifications Recommended Model Range 0 1 to 10 mW HP 8477A Accuracy 1 to 10 mW ranges 0 2 O1 and 03 mW ranges 0 5 Power Meter Calibrator HP 3440A with 3443A Piug in Unit Range 0 5 to 50 volts de Accuracy 0 05 Input Impedance 10 megohms floating Resolution 4 digits DC Digital Voltmeter Storage Oscilloscope Variable Persistence Display HP 141A with 1405A Bandwidth dc to 5 MHz and 1420A Plug in Units Input Impedance i megohm Sensitivity 5 mV division Bandwidth 400 kHz HP 1401A Input Impedance 1 megohm Sensitivity 1 mV division Cable Assembly RG 58C U coaxial cable with 2 each BNC HP 10503A 2 required male connectors Test Lead Insulated cable terminated with dual HP 1100
89. r form is as follows 1 Penn a V 4R Me RF Vc Ver 2 5 26 CALIBRATION PROCEDURE 2 a Connect thermistor mount to power meter let instrument warm up for at least ten minutes b Select 1 3 or 10 mW range c Turnthe COARSE ZERO control clockwise to indicate some convenient on scale reading d Measure Vcomp andrecord Notethat Vcomp jack is isolated from chassis ground measure from the center conductor of the BNC to the outer conduc tor e Measure VRF and record Follow measurement procedure in step d f Measure and record VCOMP VRF This term must be measured differentially that is one side of the DVM connected to VCOMP and the other side con nected to VRF In this way the full resolution of the DVM can be used g Substituting the measured values into the above formula calculate the power This formula is accurate for on scale readings however with no power applied i e V1 Vo it does not solve to P 0 because of a deleted term VO This term can be neglected for any on scale reading Section V Maintenance h I calculated power is different from the power set with the COARSE ZERO control adjust A2R6 so that meter indicates that power If the range of A2R6 is not great enough to set new power level the value of A2R70 will have to be changed i Adjust COARSE ZERO so that meter reads 1 on the 0 to 1 scale Set A2R72 for 1 000V 10 mV at the RECORDER output jack on the rear pane
90. rd Sales and Service Office Addresses are provided at the back of this manual Notice The information contained in this document is subject to change without notice Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied or reproduced without the prior written consent of the manufacturer Hewlett Packard Ltd Restricted Rights Legend Use duplication or disclosure by the government is subject to restrictions as set forth in subdivision b 3 11 of the Rights in Technical Data and Computer Software clause at 52 227 7013 Hewlett Packard Company 3000 Hanover Street Palo Alto California 94304 Statement of Compliance Electromagnetic This product has been designed to meet the protection requirements of the European Compatibility EMC Communities Electromagnetic Compatibility EMC directives information EN55011 1991 Group 1 Class A EN50082 1 1992 TEC 1000 4 2 1995 ESD IEC 1000 4 3 1995 Radiated Suseptibility TEC 1000 4 4 1995 EFT In order to preserve the EMC performance of the product any cable which becomes worn or damaged must be replaced with the same type and specification Safety Information This instrument has been designed and tested i
91. rdering information SR1358 8 SR1358 8 5750984 SR1358 8 SR1358 8 SR1358 8 R1358 8 SR1358 8 SR1358 8 SRL358 8 R1358 8 SR1358 8 SR1358 8 SR1358 8 SR1358 3 SR1358 8 SR1358 8 1854 0071 2N1701 1854 0071 2N2904A 1853 0020 1853 0020 1853 0020 1854 0071 1854 0003 1853 0001 1854 0071 1853 0020 2NTOB 1854 0071 1854 0071 2N708 1854 0071 1854 0071 2N709 2N 709 2N1595 2N1595 1854 0071 1854 0071 2N3640 1853 0020 2N1595 1854 0071 1854 0071 1853 0020 1853 0020 1854 0071 1854 0071 0757 0279 ca6865 0757 0835 0757 0447 2100 1773 0757 0289 0757 0280 0757 0458 0757 0401 0757 0465 0737 0442 0757 0447 0757 0442 0757 0279 0757 0198 Section VI Model 432A Replaceable Parts Table 6 1 Replaceable Parts Mfr Reference Description Code Mfr Part Number Designation HP Part Number Oty A2R18 A2R19 A2R20 A2K21 A2R22 A2R23 A2R24 A2R25 A2R26 A2R2T A2R28 A2R29 AZR30 A2R31 A2K32 A2R33 A2R 34 A2R35 A2R30 AZR37 A2R38 A2ZR 39 AZR40 A2R 61 A2R42 A2R43 A2Re4 A2K45 AZR46 AZR 47 AZR48 A2R lt 9 A2R50 A2RSL A2R52 A2R53 A2R54 A2R55 A2R56 A2R56 AZR57 AZR58 A2R59 A2R60 A2R61 A2R61 A2R62 A2R63 A2R64 AZROS AZR 66 AZROT A2R68 A2R69 A2RTO A2RTl A2R72 A2R73 AZR TA AZRT5 AZRT 6 A2R77 A2R 78 AZR79 A2RBO A2K81 A2R82 AeRa3 AZKB4 A2Rd5 A2K806 AZRST A2RIB A2S1 AZTPI 0698 340 0698 3156 07
92. regulator out of regulation then the meter stops working and the meter indicator points to the red RECHG BAT To recharge the battery simply connect the 432A to ac line power and turn it ON 3 16 Battery Storage Storage of the batteryator below room temperature is best Extended storage at temperatures above room temperature will reduce cell charge but will not damage the battery however the battery should not be stored where the tempera ture exceeds 60 C 140 F 3 1 Section III Operating Instructions 3 17 MICROWAVE POWER MEASUREMENT ACCURACY 3 18 A numberof factors affect the overallaccuracy of power measurement The major sources of error are mismatch error RF losses and instrumentation error 3 19 Mismatch Error In a practical measurement situation both the source and thermistor mount have SWR and the source is seldom matched to the ther mistor mount unless a tuner is used The amount of mismatch loss in any measurement depends on the total SWR present The impedance that the source sees is determined bythe acutal thermistor mount impedance the electrical length of the line and the characteristic impedance of the line Zo 3 20 Ingeneral neither the source nor the thermis tor mount has Zo impedance andthe actual impedances are known only as reflection coefficients mismatch losses or SWR The power delivered to the thermis tor mount and hence the mismatch loss can only be described as being
93. s ASSI 1N3HUn2 390149 twa Si O Ivx 390148 A AAA HOLSIWHIHL ju y2009 ZER AIBINISSV 390 48 HOLSIWH3H I IV 4 4 Section IV Principles of Operation Model 432A JO Z P S PWYS UMEL e9prig AU VZEP IS9POW E F rxn5ltd p reoq au SSOIDE JUILINI adeyeat wou SHNDIFI 38 t L d g Y y L Jo 8103920009 aseq au punose Suri prendi ayi aouauaj p J93ut JA MO LAJ OLD Pur 22 ZH 001 ir E JNOQE JAOQE JJO TIOX JO SIE LLH ED pue ae go SEN SIH SI vD A Y V L JO 8232704 estq NOLVSNAENON Go ae au azigenba o Jajaworquajod aouv eq Y St SIN U0 329f31 apom uoururo2 1rapyidwe y314 10 323n08 quazino aougpedurmn ue 81 gi aSprq ayi JO gaps om ay uaamyaq 822u02313JJIp asezyon 1oprqjdur q Y y L MAY TUI Ia ayesuaduto3 0j jua tino 89 sanddns au 9 3IDUEJSISIA 10391 ITY ay ISTIADIP JIM SaseaJout aJnjeJoduroj juatrquy 22U483818 8J IOPSIUIIYY 329 1402 urejutEW 0 AND17I ajpri1q ayi 0 jua11n2 setq Arddns 9 pue pri Are 118 apap 0 ure3 Wasting sapraozd ojESuaduroo o 32UE n wWasInd 883 Sajjddns uou rt Si8a4 SY SISeIIIaP I0JG WIIN AN ser 91 Jamod JY aduez818a1 IO1SIUII3UJ 1934103 UIEuIE 0 BNI 23p31q ay 01 quazIno serq Ayddns 11 Y SID 391008 jua tino IATA TANS 52V40334 TENDIE ABYONODIS g pue y LO JO 810705a7 03 ay UIIMI9Q aouatajjip deyoa ayi Andwe pue pd 880198 Walin aJexea WOL sinIITL aseq ay 12e301d 8210 7 Y ZIB Jo suono u
94. s used in the measurement system 3 25 When the 432A CALIBRATION FACTOR selec tor is set to the appropriate factor indicated on the thermistor mount the power indicated by the meter is the power that would be delivered by the source to 3 2 Model 432A a load impedance equal to Zo More accurately the relationship between indicated power and the power available to a Zo load is given by the following equation Led 2 P indicated 1 Pai o Calibration Factor where P power available to a Zo load O ps 7 source reflection coefficient Pier thermistor mount reflection coefficient _ SWR 1 P SWR 1 Calibration factor does not compensate for source VSWR or for multiple reflections between the source and the thermistor mount 3 26 To minimize mismatch between the source and the thermistor mount without a tuner insert a low SWR precision attenuator in the transmission line be tween the thermistor mount and the source Since the mount impedance and corresponding SWR deviates significnatly only at the high and low ends of a micro wave band it is generally unnecessary to use a tuner A tuner or other effective means of reducing mismatch error is recommended when the source SWR is high or when more accuracy is required For further de tails there is a complete discussion of microwave power measurement with emphasis on modern tech niques accuracy considerations and sources of error available in Application Note 64
95. somewhere between two limits The uncertainty of power measurement due to mismatch loss increases with SWR Limits of mismatch loss are generally determined by means of a chart such as the Mismatch Loss Limits charts in Application Note 64 The total mismatch loss uncertainty in power measurement is determined by algebraically adding the thermistor mount losses to the uncertainty caused by source and thermistor mount Zo match 3 21 RF Losses RF losses account for the power entering the thermistor mount but not dissipated in the detection thermistor element Such losses may be in the walls of a waveguide mount the center conductor of a coaxial mount capacitor dielectric poor con nections within the mount or due to radiation 3 22 Instrumentation Error The degree of inability of the instrument to measure the substitution power supplied tothethermistor mount is calledpower meter accuracy or instrumentation error Instrumentation error of the Model 432A is 1 of full scale 0 C to 55 C 3 23 CALIBRATION FACTOR AND EFFECTIVE EFFICIENCY 3 24 Calibration factor and effective efficiency are correction factors for improving power measurement accuracy Both factors are marked onevery HP ther mistor mount Calibration factor compensates for thermistor mount VSWR and RF losses whenever the thermistor mount is connected to an RF source without a tuner Effective efficiency compensates for ther mistor mount RF losses when a tuner i
96. te mit dem Namen Nummer HP XXXX lauten nun mehr Agilent XXXX Z B das Modell HP 8648 heiBt nun Agilent 8648 Questo manuale potrebbe contenere riferimenti ad HP o Hewlett Packard Si noti che le attivit precedentemente gestite da Hewlett Packard nel campo di Test amp Misura Semiconduttori ed Analisi Chimica sono ora diventate parte di Agilent Technologies AI fine di ridurre il rischio di confusione l unica modifica effettuata sui numeri di prodotto e sui nomi ha riguardato il prefisso con il nome dell azienda dove precedentemente compariva HP XXXX compare ora Agilent XXXX Ad esempio il modello HP8648 ora indicato come Agilent 8648 Este manual puede hacer referencias a HP o Hewlett Packard Las organizaciones de Prueba y Medici n Test and Measurement Semiconductores Semiconductor Products y An lisis Qu mico Chemical Analysis que pertenec an a Hewlett Packard ahora forman parte de Agilent Technologies Para reducir una potencial confusi n el nico cambio en el n mero de producto y nombre es el prefijo de la compa a Si el producto sol a ser HP XXXX ahora pasa a ser Agilent XXXX Por ejemplo el modelo HP8648 es ahora Agilent 8648 BUT TUE STRE CHARTERS WERE ZH ou mr AEST m WONT ABT SUERTE RI A TID RERA ENT HO ker HUTA ZS x AT SAS ae Hl ou EHP XXXX BIEN SI p FERE RX PURA ARTE 864 8 MEERE Sige 48168648 Document Part Number 5971 2668 Printed in Malaysia September 2004
97. the back of the Manual SERIAL PREFIX HEWLETT RACKARD COMPANY SER 1234498765 MADE IN U S A Figure 1 2 Instrument Identification Specifications Fine Zero Automatic operated by toggle switch Recorder Output 1 000 volt into open circuit corresponds to full scale meter deflection 1 0 on 0 1 scale 0 5 1000 ohm output impedance BNC connector RFI Meets all conditions specified in MIL I 6161D Power 115 or 230 Vac 10 48 to 440 Hz 13 VA max Optional rechargeable battery provides up to 20 hours continuous operation Automatic battery recharge Weight Net 6 1 2 lb 3 kg Weight with Optional Battery Pack Net 9 1 4 lb 4 2 kg Environmental Operating Temperature 0 to 55 C Storage Temperature 20 to 60 C Humidity Up to 95 Relative Humidity at 40 C EMC Meets EN55011 1991 Group 1 Class A and EN50082 1 1 1 Section I Model 432A Table 1 1 Specifications Cont Dimensions Combining Cases 1051A 11 1 4 in 286 mm deep i 1052A 16 3 8 in 416 mm deep NOT SE A MN INCLUDING KNOBS The combining cases accept the 1 3 module HP 8 FOR MEIGHT INCLUDING FEET instruments for bench use or rack mounting See IM NIE 1051A data sheet for details Options 001 Rechargeable battery installed provides up to 20 hours continuous operation 002 Rear thermistor mount input connector wired in parallel with front panel input connector 003 Input connector plac
98. to this section for ordering information Model 432A Reference Designation 1420 0062 0160 3043 0180 0197 2140 0244 2110 0234 1251 1280 00432 2005 1250 0118 1250 0118 1250 0118 1251 2357 1120 1497 0370 0077 0370 0193 0370 0432 5040 0345 5040 0702 0403 0131 0403 0026 00432 0005 00432 0006 00432 0007 00432 0011 2100 2849 2950 0034 00432 2004 0811 2538 0811 2538 0811 2538 0811 2538 0757 0984 0757 0984 0757 0198 0757 0458 0757 0200 0698 3151 0757 0317 0757 0288 0698 3155 0698 0084 0698 3156 0698 3158 0811 2277 3101 1395 3101 1234 3100 2485 00432 00031 3101 1357 00432 2003 3120 1082 8120 1083 8120 1084 Table 6 1 Replaceable Parts CHASSIS amp MISCELLANEOUS PARTS BATTERY RECHARGEABLE 24V OPT 001 C FXD CER 2 X 0 005 UF 20 250VAC C FXO0 ELECT 2 2 UF 10 ZOVDCH OPT Olde 012 013 LAMP2GLON MINIATURE 95V FUSE O 1 AMP 250V SLOW 8LOW CONNECTOR AUDIO 6 FEMALE CONTACTS NUT CONNECTOR CONNECTOR BNC CONNECTOR BNC CONNECTOR 8NC SOCKET 3 PIN MALE POWER RECEPTACLE CPART OF REAR PANEL METER KNOB SKIRTED BAR FOR 0 250 DIA SHAFT RANGE KNUBS ROTARY POINTER BLACK CAL FACTOR KNOB BLACK LEVER MT RES INSULATOR CONNECTOR LIGHT GRAY INSULATORSCONNECTOR BLACK GUIDE P C BOARD GREY GLIDE NYLON OPT 001 BRACKET TRANSFORMER DECKS LOWER DECKS UP PER BRACKET sFRAME R VAR WW 50K OHM 3 LIN 2W NUTSHEX BRASS 3 8 32 X 1 2 BUSHING PANEL R FXO
99. tor imprinted on HP thermistor mount label Apply RF power to the thermistor mount Power is indicated on the meter directly in mW or dBm NOTE The photograph opposite is for illustration purposes only Figure 3 4 Turn On and Zeroing Procedure Sheet 2 of 2 Section IV Model 432A Principles of Operation 5 KHz ILL 5 kHz MULTIVIBRATOR PULSE WIDTH PROPORTIONAL VOLTAGE ILE Ke RE 7 TO TIME BRIDGE RF CONVERTER CHOPPING amp ELECTRONIC SUMMING SWITCH CIRCUITS VCOMP po AA YCOMP YRF COMPENSATION AMPLITUDE PROPORTIONAL TO comp Yap AMPLIFIERS BRIDGE O RANGE ES O CALIBRATION FACTOR AUTO ZERO CIRCUIT Figure 4 1 Simplified 432A Block Diagram Model 432A Section IV Principles of Operation SECTION IV PRINCIPLES OF OPERATION 4 1 SIMPLIFIED DESCRIPTION 4 2 The HP 432A Power Meter consists of two ma jor sections the bridge and meter logic assemblies The instrument also contains an auto zero circuit which provides for automatic zeroing on any range A simplified block diagram of the HP 432A is shown in Figure 4 1 4 3 The bridge section contains circuits which form two self balancing bridge circuits when a suitable thermistor mount is connected to the 432A Each bridge is automatically brought to bal ance by the ac tion of a high gain dc amplifier feeding power to the top of the bridge
100. tronic part amperes automatic frequency control amplifier beat frequency oscillator beryllium copper binder head bandpass brass backward wave oscillator counter clockwise ceramic cabinet mount only coefficient common composition complete connector cadmium plate cathode ray tube clockwise deposited carbon drive electrolytic encapsulated external farads flat head fillister head fixed giga 109 germanium glass ground ed HDW HEX HG HR HZ IF IMPG INCD INCL INS INT LH LK WASH LPF MEG MET FLM MET OX MFR MHZ MINAT MOM MTG MY N C NI PL Mou w t monu H H H t Ho ow H H tt fut 4 H H unu l WH uw fW W fi M H H I Section VI Replaceable Parts 6 3 ORDERING INFORMATION 6 4 To obtain replacement parts address order or inquiry to your local Hewlett Packard Field Office see list at rear of this manual for addresses Iden tify parts by their Hewlett Packard stock numbers 6 5 To obtain a part that is not listed include a Instrument model number b Instrument serial number c Description of the part d Function and location of the part REFERENCE DESIGNATORS fuse MP filter P integrated circuit Q jack R relay RT inductor S loud speaker T meter TB microphone TP ABBREVIATIONS henries N O hardware NPO hexagonal mercury hour s NPN hertz intermediate freq NRFR impregnated incandescent NSR include s insulation e
101. uo gt aseq ay puno re s2ug1 pren ayi o2uoJa I9jur AY WO 19 9 LIO PUE 99 ZH 001 qnoge aaoge UO 8724 69 89 d put y ZI Jo sadeyon aseq ayy azijenba 03 z j urorltt od aoue eq e SI GIN U0 ppafal apour uourtuoo IaMdue y3m 10 39 1008 quarino souypadiuy ysy e 81 CI 23Pj1q ay JO SIPIS Om ay UaaMj aq 83249 19331p aBexoa Amdue g vziD A V ZI JO 8103931109 ay uaaMmjaq aJuatajjmp Zenon ayy Ajpidute ori pue 6 3BIPYI opes wouj LJA au 199101d HD pue JH 0127 sy jnduj JH au uotum 019Z SpeaJ 1393941 au JEY o8 B4p11q uopesuad W09 34 S A1 p a3ve3 0A yndyno ayi avurpadu mduy y3y sey pue Jamoj 0 adanos E SI 15 LAJ 931eu au SPIOY 2 suado x usym 28 Jo 10 23 109 343 Je adejfoA LU S 10113 ay 0 SII FEO iD Furo1az 381809 pue aujj 10 38012 N Aeray WIND ANY AM P ON Op xi US Id WINIH 4 310 820 Kv es 9 0 35v8 preoq au NSIC EN u MOU 335 49 W941 20 are Peu LI pue 191 dury TEyWIII IG t s Abt 82 10 351 91 Jaymaeury penuad I we SS Dn OI ep 8 pue 009 26600 ATGWISSY 390088 HOLS 3 nye sdwa Quarquue ut SUONELIBA 10 ajesuadiuon 07 sagueyo IWODA 3ms8al ayi 98 wouj qua Jano yoeqpeay 83 Jo azow Jujrinbau sny soSueuo aauri 81834 JOj8fpuJay ay Sadueyo a Mmyesadwa juotquie ay sy uounsn pe o uvjeq a3pr1q SI 91H pue FIN ym 9 2 1ed ur 81 YIJYM 1 10381891 SIge IEA OHSZ
102. ut 0 8 0 9 for high collector current 5 45 If theemitter base junction is forward biased check for amplifier action by short circuiting base to emitter while observing collector voltage The Good electrical insulation cor Krylon 1320 Humiseal rosion preventive properties Protective Coating Type 1B12 by Columbia Tech nical Corp Woodside 77 New York transistor should stop conduction cut off which should shift the collector voltage close to the supply voltage Any difference is due to current leakage through the transistor In general the smaller the current the better the transistor If collector volt age does not change the transistor has either an emitter collector short circuit or emitter base open circuit 9 46 OUT OF CIRCUIT TESTING 5 47 The two common causes of transistor failure are internal short and open circuits Remove the transistor from the circuit and use an ohmmeter to measure internal resistance See Table 5 5 for measurement data 5 48 COMPONENT REPLACEMENT IN ETCHED CIRCUITS 0 49 General Etched circuit boards are sensitive to heat and to scratches with sharp objects This is because the conductors are plated onto the circuit boards and the plating extends through the component mounting holes Whenever possible avoid unneces sary component substitution it can damage the cir cuit board and adjacent components See Table 5 6 for recommended tools and materials 9 50 AXIAL LEA
103. vibrator Troubleshooting 1 7 Measurements 5 11 7 8 Range Amplifier Troubleshooting 1 7 5 6 Etched Circuit Soldering Equipment 5 13 7 9 Calibrator Factor Amplifier 5 7 Safe Ohmmeter Range for Transistor Troubleshooting 1 7 Resistance Measurements 5 14 7 10 Pulse Width Modulator and Meter 6 1 Replaceable Parts 6 2 Troubleshooting 1 7 6 2 Code List of Manufacturers 6 6 7 11 Battery Charger Troubleshooting 7 9 7 1 Schematic Notes 1 2 7 12 Power Supply Troubleshooting 1 9 LIST OF ILLUSTRATIONS Number Title Page Number Title Page 1 1 HP Model 432A Power Meter 1 0 7 1 Servicing Block Diagram 7 3 1 2 Instrument Identification 1 1 1 2 Model 432A Top Internal View 14 2 1 Sub module Installation in Rack Adapter 7 3 Model 432A Waveforms 14 Frame usada ee geg 2 2 14 Model 432A Test Point Locations 1 5 2 2 HP Model 1051A Combining Case 7 5 Model 432A Bottom View Component Instrument Installation 2 2 Be EE 1 6 3 1 Precision Power Measurements 3 3 7 6 Model 432A Front Panel Interior 7 6 3 2 Front Panel Controls Connectors and 17 A1 Bridge Assembly Component Indicators 3 4 Locations 7 10 3 3 Rear Panel Controls and Connectors 3

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