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HP 423A Crystal Detector

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1. CENTER CONDUCTOR SUPPORT BEAD INNER CONDUCTOR CONTACT MECHANISM QUIER CONDUCTOR COUPLING NUT gt COUPLING SLEEVE USE To Connect On one connector retract the coupling sleeve by turning the coupling nut counterclockwise until the sleeve and nut disengage On the other connector fully extend the coupling cleeve by turning the coupling nut clockwise To engage coupling sleeve and coupling nut when the sleeve is fully retracted press back lightly on the nut while tuming it clockwise Push the connectors firmly together and thread the coupling nut of the connector with retracted sleeve over the extended sleeve Close the gap between coupling nuts with the nut on the extended sleeve connector To Disconnect 1 Loosen the coupling nut of the connector showing the wider gold band WIDER BAND 2 IMPORTANT Part the vonzectors carefully to pre vent striking the inner conductor contact CARE 1 Keep contacting surfaces smooth and clean Irreg ularities and foreign particles can degrade electrical performance COUPLING NUT INNER CONDUCTOR CONTACT COUPLING SLEEVE Protect the contacting surfaces when the connector is not in use by leaving the coupling sleeve extended Use lintless material and or firm bristled brush such as a tooth brush for cleaning a cleaning fluid is needed use isopropyl alcohol IMPORTANT Do not use aromatic or chlorinated hydrocarbons gt ters et
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11. vx S C Models 423A 8470A 1 Figure 1 Models 423A and 8470 Crystal Detectors and Model 11523 Load Resistor INTRODUCTION The 423A and 8470A Crystal Detectors are 50 ohm nominal devices designed for measure ment use in coaxial systems They measure relative power up to 100 mW and a BNC output jack to connect the detected qutput to a meter such as the 415E Frequency range of the 423A is 10 Mliz to 12 4 GHz The 84704 has additional range up to 18 GHz Y Output polarity of the Detectors is negative unless the Option 003 version is purchased Specifications and Options are listed in Table 1 The optional Load Resistor Model 11523A is mounted in a separate housing to permit easy conversion from optimum square law to maximum output Each load is identified by the serial number of the Detector to which it is matched If you have more than one Model 11523A always be sure that the proper one is in use for the Detector you are using PRECAUTIONS Electrical Shock DISCHARGE OF STORED ELECTRICAL ENERGY EASILY DAMAGE THE CRYSTAL DETECTOR A 100 pF capacitor the equivalent of four feet of coakial cable charged to 14 volts stores 0 1 erg of energy which is the maximum safe pulse rating of the detector Be certain that a cable is connected to associated equipment and discharged before connecting it to crystal detector S Handling Detector Element DO NOT HANDLE DETECT
12. 423A O 318 MIN O 322 MAX 0 214 MIN ALL DIMENSIONS IN Figure 8 Type N Connector ecl as Models 423A 8470A d Change the frequency and reset the RF output level to that measured in step c e Disconnect the power meter thermistor mount from the signal source and reconnect the detector Total variation should be 1 dB to 124 GHz dB to 18 GHz f Repeat steps b c d and e at al points of interest across the frequency band Page 9 Sensitivity Check d a Using a 10 MHz to 18 0 GHz signal source and a de voltmeter as the indicator connect the detector t the signal source and adjust the RF power level fer 100 mV detected output from the detector b Disconnect the detector from the signal source and measure the RF output level Specifica tior less than 0 35 mW should produce 100 mV detected output d Page 10 PERFORMANCE TESTS SWR Check a SPECIFICATIONS 10 MHz to 4 5 GHz 1 2 SWR 4 5 to 7 GHz 1 35 SWR 7 to 12 4 GHz 1 5 SWR 12 4 to 18 GHz 1 7 SWR Models 423A 8470A DESCRIPTION The 8470A is connected to a Coaxial Swept Slotted Line System The WR of the 8470A is measured on a swept frequency basis At any frequency where the 8470A appears to be out of specifications an SWR Meter is connected and the SWR is measured at that frequency on a single frequency basis If the SWR is within specifications at higher frequencies the Detector
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18. BNC including contact assembly Body Assembly 423A Includes tke following Type N Male Connector Outer Conductor Type N Nut Rubber Gasket Type N Nut Retaining Ring Type N Male Nut Type N Male Connector Bead Type 7 Male Connector Center Conductor Body Crystal Mount 423A Diode Replacement Assemblies Single Diode Negative Polarity Single Diode Positive Polarity Opt 003 Single Diode Negative Polarity with Matching Load Resistor Opt 002 Single Diode Positive Pelarity with Matching Load Resistor Opt 002 and 003 Matched Pair Diodes Negative Polarity Opt 001 Matched Pair Diodes Positive Polarity Opt 001 003 Matched Pair Diodes with Load Resis tor Negative Poiarity Opt 001 002 Matched Pair Piode with Load Resis tot Positive Polarity Opt 001 002 anc 003 11523A Load Resistor Assembly Connector Male BNC Connector Female BNC Spring Contact Housing 84704 APC 7 Connector Assembly Inner Conductor Contact Mechanism assemblied contact and outer body Coupling Sleeve Inner Conductor Contact Outer Conductor Coupling Nut Support Bead 1259 0251 5920 0210 00423 600 00423 601 1250 0014 1250 0015 1250 0016 1250 0918 5020 0207 00423 201 00423 202 00423 802 00423 803 00423 800 00423 801 00423 605 00423 606 00423 603 00423 604 1230 0045 1250 0251 5000 0234 5020 3215 1259 0816 1250 0820 1250 0907 1230 1183 1250 1465 9040 0306 8470A APC 7 Connecto A
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20. tor 11523 A for optimuin square law character istics at 24 C 75 F lt 0 5 dB variation from square law over a range of at least 30 dB up to 50 mV peak output working into an external load gt 75 Sensitivity typically 70 1 inV uW when load resistor bt used Overall length 144 mm 4 5 in Option 003 Positive polarity output Option 012 Furnished with stainless steel type N male connector Option 013 Furnished with stainless steel type N female connector General Weight Net 114 g 4 423A and 8470A Dimens ans 423A 63 mm long 20 mm diameter 2 46 in long 0 18 in diameter 34704 64 mm long 19 mm diameter 2 50 in long 0 15 in diameter 20 Original Packaging Containers and materials identical to those used in factory pacFaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing attach a tag indicating the type of service required return address model number and seria number Also mark the container FRA GILE to assure careful handling in any corres pondence refer to the instrument by model num ber and serial number 21 OPERATION CAUTION Static discharge can damage the detector element A 100 pF ccpacitor 1 2 m 4 ft of coax cable charged to 14 volts stores 1 erg the maximum pulse rating of the detector element Connect cables to est equipment and discharge the cen te nductor before connec
21. 0 015 dB C from 0 C to 55 C SUR 423A and 8470A 10 MHz to 4 5 GHz 1 20 4 5 GHz to 7 0 GHz 1 35 7 0 GHz to 12 4 GHz 1 50 8470 amp 12 4 GHz to 18 0 GHz 1 70 Input Impedance 500 nominal Output Impedance lt 15 shunted by 10 pF Output Polarity Negative refer to options for posi tive polarity units Detector Element Supplied refer to Table 2 for re placement assemblie Bias required Noise 200 uV with CW applied to produce 100 output das read on a meter calibrated for sqnarek w detectors Duch as HY 415E SWR Mater Options 4235 Option 001 Matched pair Frequency response characteristics exclusive of basic sensitivity track within 0 2 dB over any octave ftom 10 MHz to 8 GHz 0 3 dB from 8 to 12 4 GHz Option 002 Furnished with matched load tesis tor 11523A for optimum square law character istics at 24 C 75 F lt 10 5 dB variation from square law over a range of at least 30 dB up to 50 mV peak output working into an extemal load gt 75 kQ Sensitivity typically gt 0 1 mV uW when load resistor is used Overall length 144 mm 4 5 in Option 003 Positive polarity output 84705 Option 001 Matched pair Frequency response characteristics exclusive of basic sensitivity track within 0 2 dB over any octave from 10 MHz to 8 GHz 0 3 dB from 8 to 12 4 GHz 10 6 dB from 12 4 to 18 GHz Option 002 Furnished with matched load resis
22. 23A 8470A of the Detector and the Option 002 Load Resistor Model 11523A Additional maintenance information can be obtained from your local Hewlett Packard field office Stock numbers for replaceable parts are given in Table 2 MODEL PULSE 130C OSCILLOSCOPE SOURCE The detector element assembly includes a detector element an Option 002 load resistor for the 11523A capacitive washer and a capsule spacer The resistor is to load the diode for square law V operation the capacitive washer is to match the diode for VSWR while the capsule spacer is mainly for flatness of sensitivity All should be replaced as a unit when the diode is replaced 423A MODEL 84704 CRYSTAL DETECTOR CONTINUOUS WAVE GENERATOR Detector Element Replacement 423A MODEL 84704 WARNING CRYSTAL DETECTOR E The special detector element See Figure MODEL 43ic 3 contained in the Detector can be POWER METER damaged in handling removal or installa tion if certain precautions are not taken eg handling precautions which follow should be read before performance of any MOUNT operation with the detector element when it is out of either the housing or the Figure 2 Peak Power Measurement detector element shipping container CONTINUOUS WAVE GENERATOR 4 MODEL 64788 a N Paes Models 423A 8470A Detector Element Handfing Precautions CAUTION a Before installin
23. 423A or 8470A 004 23 601 Includes the following Matched Pairs of assemblies Option 001 Type N Male Nut 12 0 0918 Negative Polarity 08470 6005 Type N Nut Retaining Ring 1250 0016 Positive Polarity Option 003 08470 6006 Type N Male Nut Rubber Gasket 1250 0015 Body Crystal Mount 00423 202 Matched pairs of assemblies with load Type N resistors Option 002 Male Connector Center Conductor 00423 201 Negative Polarity 08470 6007 Type N Positive Polarity Option 003 08470 6008 1250 0014 5020 0207 Male Connector Outer Conductor Type N Male Connector Bead APC 7 Connector Assembly 1250 0909 1250 0907 1250 0816 4234 Diode Replacement Assemblies Inner conductor contact Inner conductor contact mechanism contact plus outer body assembled Support bead Coupling nut Outer Conductor E Coupling Sleeve Tools Single detector assembly Negative polarity Positive polarity Option 003 5040 0273 1250 0819 1250 1183 1250 0820 Single detector assembly with matching load resistor Option 002 Negative polarity Positive polarity Option 003 004 23 800 00423 801 APC 7 contact extractor 5060 0236 5060 0237 APC 7 Spanner wrench Matched pairs of assembly Option 001 Negative polarity 004 23 605 Positive polarity Option 003 004 23 606 Open end wrench 8710 0877 IReter to Tabl
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27. A 31 ai 310 d 120 Ma Road Columbus 11729 o onil Ada URLAHOMA Meridian Aegnug Jiiahgma City 131 2 aer 310 ESETE OREGON Nesthits Mail Suttle Los 5m S hotfs berry Anag Portland 97725 Tei 03 292 91 twa 210 354 410 PENNSYLVANIA 1500 Side Boulevard Man 15145 Ia 412 2710774 1NI 110 S7 1690 iMi Dh Arena ing of industrial Park Mig of Frang 13406 fel 215 ei 510 660 27670 RHODE LAND 3 1 Waterman Vue Cast Providence 22314 Yer 441 414 3933 110 483 7971 TENNESIEE e MI D nn TEXAS doe 2 Q 201 td char 4 25080 e 231519 S ONTARIO Tre rh E d 35 De Hiswa zait 793 3 40 788 NT 5 582 semet Canada Cd Y Mirad adaise el Ain en sid 192 1248 PERU meng t e Bede a A Aem E at ais wan sites mba An Tat nw ma maua ti PUERTO RICO Ir 1 Bun via in cun Md a APTA qe Dere dan 20906 te 3408 172 me San yar te ACRON Wad 2300 Westpark Detye wile 100 1702 tar It 7 1 6000 UNE 441 2645 231 Mitchell Road Zeg Antone 15226 te 5 4344151 iim UTAM 2490 Soulh Main Straat Lait Lome City 04115 1001 487 0715 310 925 5631
28. Errata Title amp Document Type 423A and 8470A Crystal Detector Operating and Service Manual Manual Part Number 00423 90001 Revision Date July 1976 About this Manual We ve added this manual to the Agilent website in an effort to help you support your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future we will add it to the Agilent website HP References in this Manual This manual may contain references to HP or Hewlett Packard Please note that Hewlett Packard s former test and measurement life sciences and chemical analysis businesses are now part of Agilent Technologies The HP XXXX referred to in this document is now the Agilent XXXX For example model number HP8648A is now model number Agilent 8648A We have made no changes to this manual copy Support for Your Product Agilent no longer sells or supports this product You will find any other available product information on the Agilent Test amp Measurement website www agilent com Search for the model number of this product and the resulting product page will guide you to any available information Our service centers may be able to perform calibration if no repair parts are needed but no other support from Agilent is available Ae Agilent Technologies 4234 8470A CRYSTAL DETECTOR TEE HEWLETT Ki PACKARD Ha
29. JAYTEE Lusaka Mea Lit OTHER AREAS NOT USTED CONTACT Hewer Packard iptercontnertat Pag Ca oma 34304 Ia 415 49091501 TWX 3 17 17 Cable HEWPACK Palo Tee 034 4300 Da Aen Hu ONTARIO Packard Canada Lit Woodward Dr Ottawa KC 024 Tor 14111 225 4530 610 962 3964 Hewlett Packard Canada Ltd 8877 Gorewzy Mina tena W 146 el debe ga Ga Tek 905 54342 22 Tee 017 74 507 Hewett Packard Mea de CU Ave 1144 Mont Tar 3571 rusa Tee 014343 MCARAGUA Robert Ter n G Ay tata Postel 649 Stig Ter n Mart Tay 250 t4 23411 Cape ROTERAN Managua Eechamca Sedna PO dox 29 Cale Samus gent Cuntad de Panama ta ga 7700 Tee 341111 Curunen Cane Zune Liz ELECTAON Panama QUIBIC fan Cassada 119 275 Hymua Biv Pointe Claire WH 117 Te 514 497 4212 TWH 410 422 3022 IL 09321327 MPCL PARAGUAY Zi Melamed 3 AL Omwen Aparatos Equipos 008 Aug do qu oos Gentiicos Ja 20 4 5 482 Edicao Asuncion Ta amp 5061 4672 Cabe RAMEL mau 8 iwga Camila 1030 Amar far 4 425 MCO Hewlett Packard Inter Amencas Vuartg Rico Srancn 272 UD Country 0063 009 82 73974557555
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31. OR ELEMENT USED IN CRYSTAL DETECTOR NEEDLESSLY Static electricity which builds up on a person especially on cold dry day must never be allowed to dis charge through the Crystal Detector Avoid ex posed leads to or from the Crystal Detector since these are often touched accidentally Refer to De tector Element Replacement for proper precautions GENERAL The crystal Detector can be used as a demodulator to obtain a pulse envelope which can then be observed on an oscilloscope It can also be used as a general purpose detector When using the Crystal Detector with an oscillo scope and the waveshapes to be observed have rise times of less than 5 usec the coaxial cable connect ing oscilloscope and detector should be as short as possible and shunted with a resistor IdPbally this resistor should be 50 ohms to terminate he coaxial 2 Table 1 Frequency Range 423A 10 MHz to 124 GHz 8470A 10 MHz to 18 GHz Below 1 GHz RF may leak through the video output connector It can be eliminated if objectionable with suitable iow pass filter Frequency Response 423A 0 2 dBioctave 10 MHz to 8 GHz 0 5 dB overall 0 2 dBioctave 10 MHz to 8 GHz 0 5 dB to 12 4 GHz 1 0 dB overall Maximum Power 100 mW peak or average Sensitivity at 25 C High Level lt 0 35 mW produces 00 mV output Low Level gt 0 4 mVdciuW CW Output decreases with increasing tempera
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34. a Rockne Maryand Roig Meadows Hanna Thee completa un ned Dave Service GENERAL INFORMATION HP 423A HP 8470A OPERATING NOTE CRYSTAL DETECTOR 423A 8470A di m HEWLETT b PACKARD oVOLRdH VEZ dH BA CERTIFICATION The Hewlett Packard Company certifies that this instrument was thoroughly tested and inspected and found to meet its published specifications when it was shipped from the factory The Hewlett Packard Company further c rttfies that its calibration measure ments are traceable to the U S National Bureau of Standards to thg extent allowed by the Bureau s calibratiqn facility WARRANTY AND ASSISTANCE All Hewlett Packard products are warranted against defects in materials and workmanship This warranty applies for one year from the date of delivery or in the case of certain major compo nents listed in the operating manual for th specified period We will repair or replace products which prove to be defective during the warranty period provided they are returned to Hewlett Packard No other warranty is expressed or implied We are not liable for gonsequential damages Service contracts or customer assistante agreements are available for Hewlett Packard products that require maintenance and re pair on site For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the bach at this manual
35. a 360 Oaks 36 6343 KENYA Dame ad Zeen WAR 9 0 Sow 10311 Nairobi 557 24554782 PROTON Medical ero Bor 19012 Naval Aport 37605556 22201 225908 KOREA b fectroma Ca bang Pri c PO Zeen Cheng Wu la bach 2410 0 jee 22573 MALAYSIA Kadu Son Bhd NA Tal rie MA 3 From Equ L i inan Sarok Road iu 290 CH Se AN Goncaives Lx 182 T 14 Av O Lun Postal 107 Lourenca Morques 27091 27114 fes 3203 Necon NOVA SCOTIA Hewitt Panard Canada Ud 800 Road 20 des 3131 Dartmouth 3277 1 19021 89 7520 TWN 90 20 4487 MA Camputasoras y Egupad Elsctramcor PO BS 990 Toledo Quio fa 525382 Tedew QR 2114 Sata ES Cape Sapia Deg EL SALVADOR natrumuntacon y Procirtamento Bectrarca da Sanacor Burar de lop heroes 448 Sen Te 252747 La Reforma 349 Lona 3 Guatemala City 83627 Tee 4192 Teen Gu NEW ZEALAND BON Z Ltd 4 12 Street Xabieme Welingron 3 Mahang Address Hewlett Packard HOI PO Box 9441 Cate REWPACH Wekngian Hewett Z Lid fepe Professional Centre 57 Prkurangs Highway Bua 1092 Ta 56 NZ 38 Cane HEM PALK Acalynca Medicas
36. able nEWPACH Taupe THAILAND UNIMESA Ce ita Choagheinon Building 56 luiwengsa Road Vei 37954 31300 7 37949 UNIMESA Boegen UGANDA Uganda Yeve Eroctrc Cn Ban 4449 tel 7279 Cape COMCO Kampala VIETNAM Peningular Trading PO 116 Hien Yuang tel 20 805 33396 Cabre PENTRA 142 LAMBLIA a Tibur ww Lie bes 1792 Lesaka Zamina Contras Africa Tel 73793 Cable ARJAYTEE Lusaka MIDOLE LAST COUNTRIES MOT SHOWN PLEASE CONTACT Co argination Otte Mediterranean and Idee Lost Operations ta Marecco 7 1 00144 Rome Eur a 9 40 79 Cable HEWPACKIT Rome leies 61514 OTHER AREAS MOT LISTED CONTACT eweti Pactard INTERCONTINENTAL 3200 Ave Pate Alto 94 304 Vel 419 326 2000 71 4931 910 373 1267 Cadie Prie Alle 934 8200 034 8493 mae ien
37. ctometer systems and measurements see HP Application Note index copies of which are available upon request 29 Harmonic Frequency Comparison Measure ment Application The detector can be used as a mixer in harmonic frequency comparison measure ments see HP Application Note Index for further information 30 PERFCRMANCE TESTS 3l The following paragraphs suggest methods to use for testing detector specifications For these tests refer to the manuals of the equipment involved for operating instructions 32 Frequency Response Test a Using signal sources covering 10 MHz to 13 Gli with a 10 dB isolating attenuator and a power meter connect power sensor to attenuator Adjust RF power levet to 20 dBm input to power sensor b Without changing power level of sig nal source disconnect power sensor c Connect detector to attenuator Measure de voltage output from detector and record meas ureinent d Chanze frequency of signal source and re peat steps a through c e Since the detector follows a square law response at this power level its output is propor tional to power Pag 10 log Total variation of detector readings should meet specifications see Table 1 for all frequencies of interest across the band NOTE Multiple mismatch errors cased by atten uator SWR power meter SWR and detec tor SWR should be taken into account as well as the accuracy of the indicator used to measure the detector
38. e 1 for description of options part of HP Model 11591A APC 7 Connector Tool Kit PERFORMANCE CHECKS Meter as the indicator connect the detector to the signal source and adjust the RF power level for any The following paragraphs suggest methods to use ient for checking detector specifications For these See BEE EE checks the instrument operator should refer to the manuals of equipment involved for operating b Without changing the RF output level instructions disconnect the detector from the signal source espo b Frequency nse Check c Using a power meter thermistor mount a Using 10 MHz to 18 GHz signal source combination measure the signal source RF output with a 10 dB isolating attenuatog and an SWR level and record it Models 423A 8470A Page 7 gt N CENTER CONDUCTOR x b SUPPORT BEAD INNER CONDUCTOR CONTACT MECHANISM A CONDUCTOR COU LING NUT COUPLING SLEEVE USE CARE To Connect 1 Keep contacting surfaces smooth and clean Irreg Nus ularities and foreign particies can degrade electrical 1 On one connector retract the coupling sleeve by performance turning the coupling nut counterclockwise until the sleeve and nut disengage On the other connector fully extend the coupling i sleeve by turning the coupling nut clockwise To COUPLING engage coupling sleeve and coupling nut when Ihe NUT sleeve is fully retracted press back lightly on the nut wh
39. e instailed to match it to the detector 48 Replacement of Load Resistor 115234 Parts 49 Parts mentioned in the following procedure are identified in Figures 2 and 3 50 Replacing BNC Connector a Remove male BNC connector and lock washer from housing To remove BNC connector use a 3 8 inch open end wrench and hold the hous ing either in a vise or with pliers Before using the vise or pliers protect the housing of the 11523A with material such as heavy paper tape or use plastic jaws oa the vise or pliers b Unsolder resistor Solder tesistor to new BNC connector 423 8470 d Let resistor cool and then check resistance from male BNC pin through resistor resistance meas sured should be 10 that indicated by tre color coding e Replace lockwasher aad male BNC con nector 51 Replacing Femaie BNC Connector a Remove female BNC connector To re move or install BNC connector use a BNC wrench or use a male BNC as a wrench to pre vent damage to the counector b Unsoider contact spring Prepare replacement female BNC connector Cut center conductor lead io approx imately 0 79 mm 1 32 in With flat file smooth end of lead zemove burr with tweezers or simi lar metal instrument d Slip contact spring over center conductor lead and solder CAUTION Use solder sparingly or it will creep back on spring Solder on sp
40. f the scope to view the ALC loop b Switch Sweep Oscillator to AUTO sweep and check leveling of ALC loop c Check output of 8472A with Oscilloscope Maximum output should be 100 mV If too high turn Sweep Oscillator output down or insert attenuator between Slotted Line Sweep Adapter and the Carriage Set Swept Frequency Indicator to LOG MODE with 2 dB em sensitivity Adjust Slotted Line probe and Swept Frequency Indicator LOG BALANCE for a noise free display Use minimum possible probe penetration Set Oscilloscope PRESENTATION to WRITE Move the carriage at least one half wavelength while sweeping the band of interest Measure the width of the trace in a vertical direction at the thickest point Compare this with specifications using the formula SWR log dB 20 or 1 2 SWR 1 58 dB 1 35 SWR 2 61 dB 15 SWR 3 52dB 1 7 SWR 4 61 dB The SWR should be less than specifications If not measure the width of the trace without sweeping Subtract this reading from the measured value If the resultant is not less than specification proceed to the following single frequency test Set the Sweep Oscillator to MANUAL sweep Set Sweep Oscillator to the frequency in question 11 Connect the output of the Carriage Probe to the input of the SWR Meter Set the SWR Meter RANGE switch to 30 dB Set the Sweep Oscillator for internal squarewave modulation and peak Andication on SWR Meter Move the Carriage Probe for a maximum indicatio
41. g detector into mount When inserting the detector element do touch exposed metal on mount with your hand to not foree the resistive end mto the discharge static electricity Then insert detector center conductor in the body as the into mount fingers of the center conductor might be E damaged if the detector element is not b When handing crystal to another person centered touch hands first to ensure thre is no difference in static electricity potential between you d Replace connector cap and TIGHTEN j FIRMLY c Ohmmeters should NOT be used to measure forward and back resistance since it is NOTE mather easy to damage these diodes The difficulty arises because of the ohmmeter open circuit volt The Option 002 Detector Element Assem ages and short circuit currents It is easy for these bly includes a detector element and a currents or voltages to damage the diode resistor The resistor 16 for use in the Model 11523A and must be installed to Replacing Detector Element match it to the Detector Parts mentioned in the following procedure are identified in Figure 3 Replacing Output BNC Connector a Remove connector from body To Tools Required remove connector cap use a pair of gas phers with plastic teeth protect body with heavy paper a Npedle point soldering won tape b Wire cutters ce Flat file 24 b Remove gid detector element capsule d Tweezers spacer and capacilive washer and disca
42. hen insert diode into mount b When handing diode to another person touch hands first to ensure there is no difference in static electricity potential between you Ohmmeters should not be used to meas ure forward and bark resistance since it is easy to damage these diodes The difficulty arises because of the ohmmeter s open circuit voltages and short circuit currents 46 Replacing Detector Element 47 Parts mentioned in the following procedure are identified in Figure 4 a Remove connector cap from body To Model 423A 8470A remove connector cap use a pair of gas pliers with plastic teeth or protect body with heavy paper or tape b Remove old detector element capsule spacer and capacitive washer and discard thera Install the new capacitivie washer capsule spacer and detector element Install the washer first the spacer with its polyiron side against the washer Fina ly install the detector element inserting the resistive end into the center contact inside the detector body CAUTION When inserting the detector element do not force the tip resistive end into the center conductor in the body as the fin gers of the center conductor might be damaged if the detector element is not centered d Replace connector cap and TIGHTEN FIRMLY NOTE The Option 002 Detector Element Assem bly includes a detector element and a re sistor The resistor is for use in the Model 11523A and must b
43. hers terpenes higher alcohols ketones ether alcohols such as benzene toluene turpentine dioxane gasoline cellosolve acetate or carbon tetrachloride Keep exposure of the connector parts to both the cleaning fluid and its vapors as brief as possible Figure 6 APC 7 Connectors 8 03 mm MIN 24704 0 316 in 7 98 mm MIN 8 13 mm MAX 0 314 in 0 320 in 8 03 mm MAX 10 316 in SNC D tus 1 60 mm MIN 0 063 in 160mmMIN Ee gt 1 67 men MAX 0 063 in gt Y 066 Y 0 066 in RR 4234 8 08 mm MIN 0 313 in 8 13 mm MAX 5 26 mm 0 322 10 207 in 14 5 43 mm MIN 0 214 in 16 mmMAX lcs VS Ad NSS A ALL DIMENSIONS IN MILLIMETRES AND INCHES Figure 7 Type N Connector Dimensions CERTIFICATION The Hewlett Packard Company certifies that this instrument met its published specifications at the time of shipment from the factory Hewlett Packard Company 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 Stendards Organization members WARRANTY AND ASSISTANCE This Hewlett Packard product is warranted against defects in materials and workmanship for a period of one year from the date of shipment Hewlett Packard will at its option repair or replace p
44. i H LA Awe SE H VAY rus ead Apwe 14 amp Jan at KAN Lagares WSA ei sien AA MISSOURI LIAL lororadn Are Mantas City 54117 Tat AIS 753 4000 ys m 43 Nuli Mu gland a 041 SOUTH AMERICA 0C o 148 Wesdbur e Teen ab ML 2085 Hu tos MEW JERSEY e MESES NORTH CAROLINA Po wn 09 LI n iser Migh 22 tel 913 485 A os C a isis d MANITOBA muet NOVA SCOTIA E Sew Ps nerd nada A Y ur iot s n HH on wos Maitas i an an MA ECUADOR MICARAGUA sboatonos fe Jade gene die Mie Fan Au ar Anat Aire ny uite Managua a 4 a M EK ab e HON At Mr di T PAN Wenas EL SALVADOR PANAMA E EA res Padua ad Auer fo 9 Ys daa L im sale umer Ao Manus ng Lan Salvador a to 4 eig duna Pesan La non 6644 se Panama City TO H e A e WA raul ana Tune GUATEMALA be UN venena ty An ues d PARAGUAT Swatemala City Mr re 4 e NU bo e e 480 oogun Mats ed Mei nie Jeran war MECUCO wo aan hc te aa MV es d m e e a d Mencen loquar mt by Runa do day dr LECT zen up i NOI Senes duige doad leetiand 14145 fai lo 3350000 et 10 421 310 3450 Soult Dina Dive Da tan 19439 Sia ID
45. ia PO Boa 38 Sir H Ta 433027 Taes HOS AS 21460 Singapore SOUTH AFRICA Hewett Packard Sourn Mu t Lg Private 3 Wendywood Sanaton 2134 Hewlett Packard Mouse Daonne Slreet Wendywood Sandton Tansy ial 2144 Tet 502 104014 Telex 5 4 4 JOHANNFSHURG Packard South Arica Lid 120 Howard Place Province 7450 Ping Pare Center Farast Drive Pinelands Cage Province 1405 Tot 57354 3 Tars 57 0008 Packard Sour Mao h Ltd H ZA 37099 Overport Quran 4087 541 Bag Acad Durban Outan ot Ta 374735 Taer 7954 Cae HEWRACH TAIANA beet Packard Far East Lu Tawan Branch y OL Sian wart Road Ih e Alan Tee 21824 HEWRACH HEWPACX PAPES breet Packard Far Bast Lg Branch 44 2 Chung cheng Ta 07 2421 4 Kaonsung Aaaiyfical Only San Awang Na M yung SL Taipei 100 Ta A ar 22894 SANAY Vid SAMAWANG 14185 TANIAMA Medical KS Ld PO Bax 98 Dareeasiaam 2125 Ext 285 Ten 47020 THAILAND Ca Lt ficom Reseach yas Ava Me RINA Cable UNIMESA Banghon UGANDA Maica Amr stat BY 2577 Kampala Ta 54108 Cadie INTAERIO Kampala Ra Tubury Zamwa td dos 2792 Kusaka fet 2393 Cable AR
46. ile turning it clockwise Push the connectors firmly together and thread the coupling nut of the connector with retracted sleeve INNER over the extended sleeve CONDUCTOR CONTACT Close the gap nuts with the nut COUPLING on the extended sleeve connector SLEEVE To Disconnect 1 Loosen the coupling nut of the connector showing P the wider gold band Protect the contacting surfaces when the connector is not in use by lesving the coupling sleev extended Use ines material and or fiym bristled brush such as tooth brush for cleaning If a cleaning fluid is needed use isopropyl alcohol IMPORTANT Do not use aromatic or chlorinated hydrocarbons es ters ethers terpenes higher alcohols ketones or ether alcohols such as benzene Loluene turpentine dioxane gasoline cellosolve acetate or carbon tetrachloride Keep exposure of the connector parts 2 IMPORTANT Part the connectors carefully to pre to both the cleaning fluid and its vapors as brief as vent striking the inner conductor contact posible r e Figure 6 APC 7 Connectors l age 8 REPLACING AMPHENOL 7 CENTER CONTACT Through wear or damage the contact in the center conductor may need replacing This contact is small four pronged collet which snaps into a recess in the center conductor This contact is normally held in by the spring action of the four prongs With a magnifying glass examine this contact to determine if it needs
47. itary standard MIL C 39012 The mating RF input connector used with the 8470A Option 013 must be Type N male connector which complies with MIL C 39012 15 Operating Environment 17 The operating environment of the crystal de tectors should be within the following limitations Temperature 0 to 55 C b Altitude 4572 metres 15 000 feet c Humidity lt 957 relative 18 STORAGE SHIPMENT 19 Environment The instrument should be stored in a clean dry environment The following environ mental limitations apply to both storage and shipment a Temperature 20 C to 55 C b Altitude 7620 metres 25 000 feet c Humidity lt 95 relative Model 423A 8470A Table 1 Specifications Frequency Range 423A 10 MHz to 12 4 GHz 84704 10 MHz to 18 GHz NOTE RF may leak through the output connector especially below 1 GHz It can be reduced if objectionable with suitable low pass filter Frequency Response 423A 10 2 dB over any octave 10 MHz to 8 GHz 50 5 dB 10 MHz to 12 4 GHz 84704 0 2 dB over any octave 10 MHz to 8GHz 0 5 dB 10 MHz to 12 4 GHz 1 0 dB 10 MHz to 18 GHz Maximum Operating Input Power 100 mW peak or average Maximum Short Term input Power 100 mW typi cal peak or average for lt 1 minute Sensitivity 125 High Level lt 0 35 mW produces 100 mV output Low Level 70 14 mVdc uW CW Output decreases with increasing temperture Typically
48. n Adjust the SWR Meter GAIN control for full scale indication on the SWR Meter Move the Carriage Probe for a minimum indication Read the SWR from the indication UNITED STATES ALABAMA 213 170 9 A Pel 205 or 4591 WX BIO 726 2704 M 5034 e 502 282 np esl VI rant H ai roa soe CALIFORNIA S390 Int Orange e ie Fullerton talo E e a hf Cameron Heu CM paee ade Alte er Ia AT 4 oe EPEE t PI Sacramania ea a 19 Ae AU min ip Diego tos E COLORADO s CANADA ALBERTS ame Maga vn JA A geane toe Ld mention ott iy ei zs CENTRAL ARGENTINA wet Pa hed iqen ng Aia A s oa wae MPA BRAZIL semi ES K dua re anms 4 fae fie i gt e LEO ET VI ali e cae e Mowatt Ana We dre P aa tee 46 WA Marty degre Mia Grande de tal 4 In S 44 7 so EPA den et oc H Tor da dota o P H lasera od etm ad In en ape dEMPA A dus ie aes CONNECTICUT me Maren NT R ILORIDA 4 ale 1 nun An 450 a ER Ur Lade y oa An GEORGIA
49. ng and then screw connector into mount REPLACEABLE PARTS This sectien contains information pertaining to replaceable parts see Table 2 and the ordering of these parts for the Models 423A 8470A and 11523A e order a replacement part address order inquiry to your local Hewlett Packard field office see list at rear of this Note Specify the following information for each part a Model number b Hewlett Packard stock number c Description of part 6 Models 423A 8470A Table 2 Replaceable Parts Models 423A 8470A and 11523A Connector male BNC 11523A 1250 0045 Matched pairs of elements with matching load resistor Option 002 Negative polarity Positive polarity Option 003 Connector female BNC 1250 0251 00423 604 Connector Assembly female BNC 004 23 600 including contact assembly 8470A Diode Replacement Assemblies 5020 0210 Connector Cap Single Detector Assembly Negative Polarity Positive Polarity Option 003 08470 6001 08470 6002 Housing for 11523A 5020 3215 11523A without resistor includes serial plate to be attached to 423A 11523 6Q0 amp ingle Detector Assembly with matching load r sistor Option 002 Negative Polarity Positive Polarity Option 003 08470 6003 08470 6004 Body Assembly
50. of the four prongs With a magnifying glass examine this contact to determine if it needs re placement DO NOT REMOVE THIS CONTACT FOR INSPECTION it may be damaged by removal The contact should be free of burrs or wear and the prongs should be equally spaced If the contact is rernoved do NOT re use it it may be damaged by removal This contact is Amphenol part number 131 129 and HP 1250 0907 H this contact needs replacement and a new contact is available proceed as follows 1 Place the instrument so the connector faces down if possible 2 Tapthe connector lightly and the contact should new protrude slightly Insert the centering pin of the Hewiett Packard collet remover Part Number 060 0236 with the jaws open 3 Allow the jaws on the tool used to close and puli straight back from the connector without twisting The contact should come with the tool f not repeat the process Do NOT re use the contact INNER CONDUCTOR CONTACT OUTER CONDUCTOR 4 Snap in anew contact by pushing a new contact in place Test the action of the new contact by pushing in on it It should spring out again when released Amphenol Part Number 131 129 HP Part Number 1250 6907 Amphenot RF Division Danbury Conn Figuse 5 APC 7 Connector Table 2 Replaceable Parts Models 423A 84704 and 11523A wan se Description 423A Assembly Connector Female BNC Connector Cap Cannector Assembly Female
51. or millivoltmeter can be used as the indicator 26 Operator s Checks 27 Peak Power Measurement The arrangement of equipment for peak power measurement is shown in Figure 1 The procedure involves calibration of an oscilloscope which in turn is used to calibrate CW generator The output of the calibrated CW generator is measure with a power meter the peak power of a pulse is thereby measured The proce dure is as follows a Connect equipment as shown in Figure 1 step a Observe pulse on a dc coupled oscilloscope Using a marking pencil mark cn the graticule the base to peak amplitude of the pulse envetope b Replace the pulse source with a CW gen erator While observing the oscilloscope trace ad just amplitude of generator output to make de tector s output equal to that of pulse generator as indicated by markings on graticule step a Leave generator at setting obtained in step b Disconnect detector from CW generator step PULSE SOURCE OSCILLOSCOPE L CRYSTAL DETECTOR VERTICAL CONTINUOUS NAVE OSCILLOSCOPE GENERATOR WAVE GENERATOR Figure 1 Peak Power Measurement Model 423A 8470A Connect output of CW generator to power meter Measure adjusted levels set in step b of CW gener 3tor output The peak power of the pulse observed in step a is equal to the output power of the CW generator 28 Reflectometer Application For information about refle
52. outpus 33 High Level Sensitivity Test a Using signal sources covering 10 MHz to 18 GHz and a de voltmeter or osciticscope as the indicator connect detector to signal source Ad just power level for a 100 mV detected output from detector b Disconnect detector from signal source and measure RF output level The RE output level should be lt 0 35 mW c Repeat s eps a and b for all frequencies of interest across the banet 34 Low Levei Sersitivity Test a Using a signal source covering 100 MHz to 1 GHz 10 dB attenuator and a power meter connect attenuator to signat source and power sen sor to attenuator Adjust RF power level for 20 dBm output from attenuator Verify the am bient temperature b Disconnect power sensor from attenuator and connect detector Measure de voltage output from detector The output should be gt 4 0 mV at 25 The sensitivity slope is typically 0 015 dB from 0 C to 55 C NOTE Multiple mismuteh errors caused bv atten uator SWR power meter SWR and detec tor SWR so ild be taken into account as well as accuacy of indicator used to meas ure detector s output 35 Match Test SWR 36 To verify the detector s SWR specifications use any system whose measurement accuracies for SWR residual SWR are known 37 ADJUSTMENTS 38 The detectors have no internal adjustments 39 REPLACEABLE PARTS 40 The succeeding paragraphs contain informa tion pe
53. ption 002 Furnished with matched load re sistor HP 11523A for optimum square law charac teristics Positive polarity output Furnished with stainless steel type N male connectors 470A only Furnished with stainless steel type N female connectors S470A only Option 003 Option 012 Option 013 Model 423A 8470A 10 INSTALLATION 11 Initial inspection 12 Inspect the shipping container for damage If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically 13 The procedures for checking electrical perfor mance are given under PERFORMANCE TESTS the contents are incomplete if there is mechanical damage or defect or if the instrument does not pass the electrical performance test notify the nearest Hewlett Packard office If the shippiag or ner is damaged or the cushioning material snow uns of stress notify the carrier as well as tae Hewlett Packard office Keep the shipping materials for the carrier s inspection The HP office wil arrange for repair or replacement at HP s option without wait ing for claim settlement 14 Mating Connectors 15 84704 standard input connector must be an APC 7 type connector The mating RF input connectors used with the 423A and 847 A Option 012 must be Type N female connec tors which comply with U S mil
54. ption 002 Furnished with matched load resistor 11523A for optimum square law characteristics at 24 C 75 F lt 0 5 dB variation from square law over a range of al least 30 dB up to 50 mV peak output working Into an external load lt T5k 1 Sensitivity typically gt 0 1 mV uW when load resistor is used Overall length 4 1 2 in 144 mm Option 003 Positive polarity output Option 012 Furnished with male connector 5 Option 013 Furnished With stainless steel type N female connector detectors such as HP 415E SWR Meter nemen dh ere S eg Models 423A 8470A Page 3 cable properly However with 50 ohms resistance c Replace the pulse source with a CW gener possibly the output video pulse may be too small ator step 2 While observing the oscilloscope to drive some oscilloscopes Therefore the cable trace adjust amplitude of generator output to should be shunted with the smallest value of make crystal output equal to that of pulse gener resistance that will obtain suitable deflection on ator as indicated by markings on graticule step b the oscilloscope typically the value will lie be tween 50 and 2k ohms The larger the resistance d While performing the next step leave CW the more degradation of rise time e generator at setting obtained in step c Disconnect Detector from CW generator Connect output of The power applied to the Detector can be either CW genera
55. r Mewiel Packard italiana 5 4 Via Amerigo vespucei 2 1 20124 Milan le 2 6231 10 ner Cable NEWPACKIT Milan Teien 12046 Mentatl tatiana SpA Passa Marcon 100144 Rama Eur Tas 6 5912544 591594 Catie MUNPACRIT tome 41514 Packard 94 Bine Var Ltd ESTA Sara Dee Road Tocundersbad 3 74331 7 7 91 Cabre 00069057 Bus Star Lid 23 M Second Lins Bec Madras 1 indie Te 2 39 55 Taies 179 BLUESTAR Give Star Cid 18 Anver Bungaion Ging aol ter 04 Cable BLUESTAR INDONESIA Beien Trading Coy Mv Dialah Merdeka 29 indis Te 4915 51550 Cable ILMU Jews 04 00 IRAN Mylierp nternationat td Avenue Soraya 100 Bos 1217 Tet 0310 19 09 MULTICONP Tehran feien 27893 mc tm ISRAEL Clectromes amp Engineering Oiv el Metorola iu tet Uta 17 Mninadev Street 936941 43 Hes RASTEL fei Aviv feie MOTH N JAPAN ehogsws Mewiett Packard Lid Onasi Building 1 361 Yeregi Ihbuys iu Toya fel 23 170 2281 32 telen 732 7024 WP Cable IOR 23 774 Tohagswa Fewiett Packard ihi M i Ibarag Bldg 228 Aawge Si 9 22 fel 0726 211641 fees 3332 Wa YHP OSARA tahogawe Newlelt Pachard 016 Ite Building No 99 Reler che Nabomera 4y ageya City fet 082 551 0215 eri Packard
56. rd them gt Procedure Parts mentioned in the following pro Install the new capacitive washer capsule cedure are identified in Figures 3 and 4 spacer and detector element Install the washer first the spacer with its polyirbn side against the Remove BNC connector and lock washer washer Finally mstall the detector element by N inserting the resistive end into the center contact b Unsolder contact spring soldered to center inside the Detector body vonductor lead D och 5 WASHER Of TEC TOR ELEMENTO gt RESISTIVE ELEMENT CONTACT trag ASSEMBLY ALE NU CONNECTOR CAP CAPSULE SPACER TO etia TAME se 708 atm act m 04 3 f1 OC ei Capaciteve WASHER RETAINING RING Figure 3 Model 423A Assembly amt A A AA AAA edd a Models 123A 8470A CONTACT SPRING 1 32 Figure 4 Cutting Center Conductor Lead to Accommodate Contact Spring 1 Cut center conductor lead to approxi mat ly 1 32 ineh see Figure 4 t 2 With flat file smooth end of lead wipe off burr with tweezers or similar metal instrument c Shp contact spring over center conductor lead and solder CAUTION Use solder sparingly or at will creep back on spring Solder on spring destroys its usefulness and solder is difficult to remove from spnng d Let spnng cool and then replace lock washer and connector in connector cap Replacement of 11523A Parts Parts men
57. ren 23515 hpa fohogawa Mewiett itd PAKISTAN Matto 6 Company Lid 242 Ousmen Chambers tu Abdullah Noreen Bead 222 Tel 511027 312927 COOPERATOR amp Company LiG 045 432 1504 es 382 S207 von had Li Chus Bide HOB Strine tawn Am 60 dono 2 Chome Tes 41924 CHQ Cabe FEMUS Ramarpind 910 PHILIPPINES Cectremen Im tel 0297 25 7470 KENYA Sth Architects Kinet s Center Bide 18311 Miras Rare Kenya 2C PQ 1028 tel 37776 Cable PROTON Tet 296 18 07 67 78 77 t x Cotte LEMEE Marcia Amtraco Corporation industrial Products Dev PO Bau 1105 SINGAPORE Mechanical end Combustion Enginering Company Lid 4th oo OaeRyung Wide Y adm dilang 107 Seong Ge Hill Estate Chongro Ay feou tegos 1 fei 770934 T d 64238 832011 Cadie AMTRACO Cable Singapore LEBANON nenieti Pochard fast Constantin Macrids Area Office 720 PO Ses H Aiexandra Post Tel 720044 fingapert 3 Cable ELECTROMUCIEAR re 431027 MALAYSIA Cable NEWPACA SINGAPORE MECOMB Maierua Lid 1 Loreng 13 44 SOUTH AFRICA Section 13 Mewtett Packard South Africa Petaling Coble MECOME Kuala tumpur P O Bor 21716 Beaamtonte n
58. replacement DO NOT REMOVE THIS CONTACT FOR INSPECTION it may be damaged by removing The contact should be free of burrs or wear and the prongs should be equally spaced If the contact is removed do NOT re use it il may be damaged by removal This contact is Amphenol part number 131 129 and HP 1250 0907 If this contact needs replacement and a new contact is available proceed as follows 1 Place the instrument so the connector faces down if possible 2 Tap the connector lightly and the contact should now protrude slightly Insert the centering pin of the Hewlett Packard collet remover Stock Number 5060 0236 with the jaws open IL this tool is not Wen ordinary draftsman s mechanical pencil may be used the end of the jaws may have to be filed to get a good grasp at the very end A 3 Allow the jaws on the tool used to close and pull straight away from the connector without twisting The contac should come with the tool If not repeat the process Do NOT re use the contact ih ree Models 423 8470 _ COUPLING SLEEVE ya Umm vem N HUE ON A e na 4 Snap in new contact by pushing new contact in place Amphenol Part number 131 129 HP Part number 1250 0907 Amphenol RF Division Danbury Conn Figure 7 APC 7 Connector 84704 0 314 MIN 0 316 MIN 0320 O 316 MAX AS RN 0 063 MIN 0 066MAX t 0 063 MIN y 0 066 MAX
59. ring destroys its usefulness and is difficult to remove e Letcontact spring cool and then screw connector into mount 52 Replacement of APC 7 Connector Center Contact 53 The replacement procede for the APC 7 connector center contact is covered in Figure 5 CONTACT SPRING 0 79 nm 1 32 in Figure 2 Cuttiny Center Conductor Lead to Accommodate Contact Spring RESISTOR CONTACT SPRING LOCK WASHER LOUK WASHER MALE BNC FEMALE SNC HOUSING Figure 3 11523A Load Resistor Cutaway View The disassembly and assembly instructions for the APC 7 connecotr is covered in Figure 6 54 Type N Connector Dimensions 55 The critical dimensions for the type N connec tor are covered in Figure 7 ELEMENT RESISTIVE ELEMENT RUBBER GASKET 7 T RETAINING RING UN N Model 423A 8470A FEMALE ANC CONNECTOR TN S N X uc y ges KC CONNECTOR LOCK WASHER CONTACT ASSEMBLY 3 1 capacitive WASHER O MEA Tra AMAL ACEO MATER TAKE 2702 MODS MEBLACKMENT NUMBERS Figure 4 HP Model 423A Crystal Detector Assembly REPLACING A MPHENOL APC 7 CENTER CONTACT Through wear or damage the contact in the center con ductor may need replacing This contact is a small four pronged collet which snaps into a 1ecess in the center conductor This contact is normally hell in by the spring action
60. roducts which prove to be defective during the warranty period provided they are returned to Hewlett Packard and provided the preventive maintenance procedures in the manual are followed Repairs necessitated by misuse of the product are not covered by this warranty NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED INCLUD ING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE HEWLETT PACKARD IS NOT LIABLE FOR CONSEQUENTIAL DAMAGES Service contracts or customer assistance agreements are available for Hewlett Packard pro ducts For any assistance contact your nearest Hewlett Packard Sales and Service Office Address es are provided the back of this manual HEWLETT AN PACKARD SALES amp SERVICE OFFICES AFRICA ASIA AUSTRALIA Calcutators Only rae Sien Paga Paga Te Cable CLEANC Paga Paga ANGOLA tasara reza T cnica qe upamentos D n SAAL A Barbosa Rodrigues 42 201 Postal 843 uenda 355156 TELECTRA Luanda AUSTRALIA Australia v Joseph Sr eet Blackbur Victona 3130 3 Doncaster fast Vicrona 3109 49 8351 Taer 31 024 Cable HEWPARD Melbourne Packard Austria y Beye See mine New South Wales 2073 149 5548 Tee 21381 HEWPARO Sydney Hewlett Packard 9 Da EM Acad Perkalde 506 3A Te 2725011 82538 AD HEWPAAD eng Howlett Pactard Av aa
61. rtaining to replaceable parts see Table 2 and the ordering of replaceable parts for the Models 423A 840A and 11523A 41 To order a replacement part address order or inquiry to the nearest Hewlett Packard office see 6 list in back of manual Include the following in formation for each part model number Hewlett Packard part number and description 42 SERVICE 43 The succeeding paragraphs give instructions for repair of the Model 423A and 8470A Crystal Detectors and the Option 002 Load Resistor Model 11523A Additional mairtenance informa tion can be obtained from the local Hewlett Packard office Part numbers for replaceable parts ar given in Table 2 44 Detector Element Replacement 45 The detector element assembly includes only detector element unless an Option 002 is ordered then a replacement load resistor for the 115234 is included The resistor is to load the diode for square law operation CAUTION The special detector element see Figure 4 contained in the detector can be damaged in handling removal or installation if cer tain precautions are not taken Then hand ling precautions which follow should be read before performance of any operation with the detector element when it is out of either the housing or the detector ele ment shipping container a Before installing diode into mount touch exposed metal on mount with your hand to dis charge static electricit T
62. ssembly Cont d Tools APC 7 Contact Extractor APC 7 Spanner Wrench Open end Wrench 8470A Assembly Resistor Tubular Ring RF Connector Opt 012 Connector BNC Connector RF APC N Female Opt 013 Contact RF Connector Fema e Opt 013 Connector RF APC N Male Opt 012 Contact RF Connector Male Opt 012 Nut RF Connector Opt 012 Washer Lock Internal Contact Spring Cap Connector Insulator Washer Compression Washer Fiber Body Crystal Mount Conductor Center 8470A Diode Replacement Assemblies Single Diode Negative Polarity Single Diode Positive Polarity Opt 003 Single Diode Negative Polarity with Matching Load Resistor Opt 002 Single Diode Positive Polarity with Matching Load Resistor Opt 002 003 Matched Pair Diodes Negative Polarity Opt 001 Matched Pair Diodes Positive Polarity Opt 001 003 Matched Pair Diodes with Load Resis tor Negative Polarity Opt 001 002 Matched Pair Diode with Load Resistor Positive Polarity Opt 001 002 and 003 Meter to Table 1 description of options gt Part of HP Model 813917 APC 7 Connector Tool Kit 5060 0236 5060 0237 8710 0877 0727 1033 1250 0016 1250 0251 1250 0914 1250 0915 1250 0916 1250 0917 1250 0918 2190 0016 5000 0231 9020 0210 9040 0306 08470 0001 03470 0002 03470 2000 08410 2001 08470 6001 08470 6002 08470 6003 03410 6004 08470 6005 08470 6006 03470 6007 03 170 6008
63. ting to the detector DO NOT NEEDLESSLY HANDLE DE TECTOR ELEMENT USED IN CRYS TAL DETECTOR Static electricity which builds up on u person est ecial ly on a cold dry day must never be atlowed to discharge through the tal detecior Avoid exposed leads to or from the crystal detector since these are often touched accidentally 22 Operating Information 23 crystal cetector can be used as a demodu lator to obtain a pulse envelope which then be observed on an oscilloscope can also be used as a general purpose detector 24 When using the crystal detector with an oscil loscope and the waveshapes to be observed have rise times of less than 5 us the coaxial cable ce A necting oscilloscope and detector should be as short as possible and shunted with a resistor Ideal ly this resistor should be 50 to terminate the coaxial cable properly However with 5012 resis tance the output video pulse may be too small to drive some oscilloscopes Therefore the cable should be shunted with the smallest value 01 resis tance that will obtain suitable deflection on the oscillescope typically the value will lie between 508 and 2 The larger the resistance the more Model 4234 84 70A degradation of rise time 25 The power applied to the detector can be either modulated or continuous wave CW modulated at a 1020 Hz rate an SWR meter can be used as an indicator For CW detection a dc milliammeter
64. tioned in the following procedure are identified in Figures And 5 Tools required are listed in Replacing Output BNC Connector Tools Required Replacing Male BNC Connector a Remove male BNC connector and lock washer from housing To remove BNC use a 3 8 nch openend wrench and hold the housing either in a vise or with gas phers Before putting pliers on protect the housing of the 11523A with material such as heavy paper b Unsolder resistor c Solder resistor to new BNC d Let resistor cool and then check resistance from male BNC pin through resistor resistance measured should be 10 that indicated by the coding Page 5 RE SISTOR CONTACT SPRING N LOCK WASHER LOCK WASHER e MALE BNC FEMALE BNC SOLDER THESE POINTS HOUSING Figure 5 Model 11523A Load Resistor Cutaway View e Replace fockwabher and male BNC Replacing Female Connector a Remove BNC connector To remove or install BNC use a BNC wrench or use a male BNC connector as a wrench b Unsolder contact spring v Prepare replacement BNC connector 1 Cut center conductor lead to approx imately 1 32 peh 2 With fat file smooth end of lead wipe off burr with tweezers or similar metal instrument i d Shp contact spring over center conductor lead and solder CAUTION Use solder sparingly or it will creep back on spring Solder on spring destroys its usefulness and is difficult to remove e Let contact spri
65. tor to a thermistor and power meter modulated or continuous wave CW If modulated Measure adjusted level step c of CW generator at a 1000 cps rate the sensitive HP Model 415B E output i lt an be used as the indicator For CW detection a de milliammeter millivoltmeter such as the HP e The peak power of the pulse envelope Model 425A Microvolt Ammeter can be used as the observed in step b is equal to the output power of indicator the CW generator Peak Power Measurement Reflectometer Application The arrangement of equipment for peak power For information about reflectometer systems and measurement is shown in Figure 2 The procedure measurements see HP Application Notes 54 and involves calibration of an oscilloscope which in 61 and Hewlett Packard Journal Vol 12 No 4 turn is used to calibrate a CW generator The December 1960 copies of which are available upon output of the calibrated CW generator is measured request with a bower meter the peak power of a pulse is thereby measured The procedure is as follows HARMONIC FREQUENCY COMPARISON MEASUREMENTS a Connect equipment as shown in Figure 2 step 1 The Detector can be used as a mixer in harmonic b Observe pulse on a de coupled oscillo frequency comparison measurements scope Using a marking pencil mark on the grati cule the base to peak amplitude of the pulse REPLACEMENT OF PARTS envelope Succeeding paragraphs give instructions for repair Models 4
66. tramas Gencanen d 3 1 Aet 14 Ae 0 Los 00 59 Meet ber 107 fel 723 2080 775 1030 Lourenco Marques Telex 0226 M Came NEGON Cable lohanne sur a ZEALAND Ary D Seuth Atrica Brea I Sreecastie House 9 Aer eu Street our Capa Town N I fet 36013 14545 tal 56 399 alive Cape Torn Cable MEWPACK Hewlett NI ita teie 5 2006 ewistt Packard South Bos 31092 in Pokuranga i Tel 96 3837 41 Ridge tosd Durban MEWPACR Auctiand PD 14 4102 Tele 54 REWPACH Wi UNITED KINGDOM ewiett Packard 116 174 Gath Quad 4 05 Burts Tel Siough 0733 33941 Cabe tough 8441 newiett Packed Lid Tre Grotlens Tismiord New Road Te 061 NM Trier 668088 SOCIALIST COUNTRIES PLEASE CONTACT Packard ons 52 1 PO Bes A 1203 Vienen Pw 0272 1 0 te Cable MOWPACK Vienna 74921 hewps A ALL OTHER CUROPEAN COUNTRIES CONTACT Mewtett Poctord 4 fus tu Bole CH 1217 7 Geneve Yeitzertand ter 022 41 00 Cable MEWPACH A Geneve 224 M TAIWAN Packard Toman Cheng Shine West Bund 1 Overseas inemrance Corp Bitig Hp Few Ten fe 59 60 1 2 175301 Lar 240 245 pies 19824 NEWPACR C
67. ture Typically 0 015 dB C frum 0 C to 55 C Impedance 50 ohms Reflection Coefficient 423A and 10 MHz to 4 5 GHz 0 091 12 SWR 4 5 GHz to 7 0 GHz 0 15 1 35 SWR 7 0 GHz to 12 4 GHz 0 2 1 5 SWR 8470A 12 4 GHz to 18 0 GHz 0 26 1 7 SWR Output Impedance lt 156 shunted by 10 pF Detector Element Supplied Refer to Table 2 for replace ment assemblies Output Polarity Negative Refer to options for positive polarily units Noise 200 uV p p with CW applied to produce 100 mVde output As read on a meter calibrated for Wi E Models 423A 8470A Specifications Connectors 423A Option 001 Matched pair Frequency response characteristics exclusiv of basic sensitivity track within t 0 2 dB per octave from 10 MHz to 8 GHz 0 3 dB from 8 to 12 4 GHz Option 002 Furnished with matched load resistor 11523A for optimum square law characteristics at 24 C 75 F lt t 0 5 dB variation from square law over a range of least 30 dB up to 50 mV peak output working into an external load gt 75k ohms Sensitivity typically lt 0 1 mV uW when load resistor is used Overall length 4 1 2 in 144 mm Option 003 Positive polarity output 8470A Option 001 Matched pair Frequency response characteristics exclusive of basir sensitivity track within 0 2 dB per octave from 10 MHz to 8 GHz 0 3 dB from 8 to 12 4 GHz 0 6 dB from 12 4 to 18 GHz O
68. will be within specifications at lower frequencies also Swept Frequency Oscilloscope Indicator i I Sweep Oscil lator Sfotted Line Sweep Adapter 4234 86704 Under Test Adapter Carrioge Figure 9 SWR Test Setup EQUIPMENT Slotted Line Carriage HP 809C Slotted Line 816 Slotted Line Sweep Adapter HP 448A The above instruments form the HP 817A Coaxial Swept Slotted Line System Sweep Oscillator HP 8690 mainframe with 8699 110 MHz to 4 GHz HP 8690 mainframe with 8693 4 to 8 GHz HP 8690 mainframe with 8694 8 to 12 4 GHz HP 8690 mainframe with 8695 12 4 to 18 GHz Swept Frequency Indicator HP 1416A Oscilloscope 1 x9 HP 141A SWR Meter MM CP EC VE ENSE HP 415E Adapter 62826 EUR wu WE EU HP 11534A For details see Operating Note for Model BITA Coaxial Swept Slotted Line System Models 423 8470 11 12 PERFORMANCE TESTS PROCEDURE 12 13 14 15 16 Connect the equipment as shown in Figure 9 Set the Sweep Oscillator to sweep the band of interest Level the sweep oscillator as follows Manually sweep the band and Sweep Oscillator output and Slotted Line Sweep Adapter probe penetration for a leveled ALC signal with a DC output of 25 mV Use a BNC Tee and momentarily connect the Vertical Input o
69. wlatt Packard Co 1975 Page 2 1 GENERAL INFORMATION 2 This manual contains operating instructions for the Hewlett Packard Model 423A and 84704A Crys tal Detectors Included in the manual is the inform ation required to install and test the crystal detectors 3 On the rear cover of this manual below the manual part number is a Microfiche part num ber This number may be used to order a x 6 inch microfilm transparency of the manual 4 Specifications 5 Instrument specifications are listed in Table 1 These specifications are the performance standards or limits against which the instrument may be tested 6 Description 1 The Hewlett Packard Model 423A and 8470A Crystal Detectors are 501 nominal devices de signed for measurement use in eoaxial systems The instruments convert RF power levels applied to the 5012 input connector into proport ona values of de voltage The instruments measure relative power up to 100 mW and have a BNC femaie connector for the output jack which aliows the detected out put to be connected to a SWR meter The output voltage potarity is negative unless Option 003 is selected The frequency range of the 423A is 10 MHz to 12 4 GHz Tne 8470A s frequency range extends from 10 MHz to 18 GHz 8 Options 9 423A and 8470A Crystal Detectors are available with the following options see Table 1 for further descriptions Option 001 Matched pair of detectors O

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