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1. 0121 0405 C VAR 3 5 53 5 PF 28480 0121 0405 0122 0301 C VOLTAGE VAR 6 8 PF 10 28480 0122 0301 0140 0192 C FXD MICA 68 PF 5 300VDCW 28480 0140 0192 0140 0193 C FXD MICA 82 PF 5 300VOCW 28480 0140 0193 0140 0198 C FXD MICA 200 PF 5 300VDCW 28480 0140 0198 0150 0011 C FXD TI 1 5 20 500VDCW 78488 GA 1 0150 0029 C FXD TI 1 PF 10 500VOCH T8488 GA 3 0150 0031 2 5 SOOVDCM 78488 GA 2 0150 0034 C FXD 3 9 PF 10 500 78488 GA 1 0150 0635 C FXD CER 20 PF 10 600VDCM 71590 TYPE DD 200 1 0150 0661 C FXD CER 20 PF 10 100VOCW 56289 53 41 i 0150 0093 C FXD CER 0 01 UF 80 20 100VDCW 91418 20 0150 0122 C FXD CER 2000 PF 20 500VDCM 12982 801 000 55 202 3 0160 0147 C FXD MICA 2500PF 2 300VDCH 04062 RDM20F252G3S 1 0160 0174 C FXD CER 0 47 UF 80 20 25VDCW 56289 5C1187 2i 0160 0183 C FXD MICA 130PF 5 300VDCH 14655 RDM15F131J3S 2 0160 0194 C FXD MY O ULSUF 10 28480 0160 0194 3 0160 0196 C FXD MICA 24PF 5 300VOCW 04062 RDM15C240J3 ct 0160 0207 C FXD MYLAR 0 01UF 57 200V0CW 28480 0160 0207 L 0160 0939 EXD MICA 430 5 300 VDCH 28480 0160 0939 i 0160 2055 CER 0 01 UF 80 20 LOOVOCW 191418 0160 2143 C FXD CER 2000 80 20 1000VDCW 91418
2. CR2 CHECK ASCRI amp A3CR2 INPUT RESISTANCE CHECK A3 Attenuator do PRF CHECK ro CHECK Sampling Switch to Stay in PRF Mode APC Mode No readout Readout all zeros do PRF CHECK Range 2 Range 05 1 GHz 1 4 2 GHz GHz check check A7Q5 QT A8Q18 and A8 Some thumbwheel settings OK check thumbwheel switches All thumbwheel switches OK in all ranges and A10 SAMPLING CHECK Not sampling Sampling do 1 amp 2 PRF CHECK No meter Meter Meter reads OK readiny reads i to or right Meter or 5 peak ez holding Check Power APC Supplies Fx CHECK A4R10 INPUT RESISTANCE CHECK No lock Locks check A4 amp AG Atten I No Counter Counter readout but reads out lock indica tion on Scopc at PRF Jack finhibit ckts Sensituvity A4 kHz check ose filter 6 level det A8Q181 Section Maintenance and Troubleshooting g Set instrument up side down onbench and care fully pull front panel out far enough to free V FO tuning drive shaft from the panel h Carefully position plastic plug in guide to allow removal of VFO gear train Do not bend out plug in uide more than absolutely necessary as cables onnected to the power supply filter board can be broken easily i Carefully lift out the VFO gear train by lifting gear train end far enough for rear protion of the assembly to cle
3. 193 1853 0010 Section VI Parts DUAN N ete m NI Nee rm i one NAW Ww See list of abbreviations in introduction to this section Section VI Parts 1855 0038 1901 0040 1901 0179 1901 0567 1901 0573 1901 0581 1902 0685 1902 0686 1902 3079 1912 0012 2100 1760 2100 2075 2190 0325 3050 0161 3100 2406 3100 2409 2100 2420 5020 3297 5040 0157 8180 0224 9100 0346 9100 0368 9100 1124 9140 0096 4140 0138 9140 0158 9170 0029 00101 2001 05251 00004 05257 20001 05257 20002 05251 20003 05251 20004 05257 20005 95251 20006 5257 20007 05257 20008 05257 20211 05257 20011 05257 20012 05257 20013 05251 20023 05257 20024 05257 20054 05257 60001 05257 60002 05257 60003 05257 60004 05257 60005 05251 60006 05257 60007 05257 60008 05257 60231 05251 60011 05257 60012 6 18 Table 6 2 Replaceable Parts Cont d 3 Stock No Description 4 TRANSISTOR DUAL 2 3922 DIODE SILICON 30MA DIDDE SILICON 15wv DIDDE SILICON SAMPLER ASSY 15818 28480 28480 28480 28480 SAMPLER DIODE ASSY MATCHED PAIR DIODE BREAKOOWN 9 0V
4. ALDIC4 AINIC5 101 6 101 7 1 C8 ALOICS 101 10 ALOMP1 ALORI All 1820 0399 1820 0399 1820 0399 1820 0399 1820 0399 1820 0399 1820 0399 1251 1115 0757 0918 05257 60031 05257 20031 0180 0097 0160 2143 0160 2143 0180 0387 0180 0387 0180 0291 9140 0096 9140 0096 9140 0138 See introduction to this section for ordaring iniormation INTEGRATED INTEGRATED INTEGRATED INTEGRATED INTEGRATED INTEGRATED INTEGRATED KEY POLARI ZING FOR CKT BD SOCKETS CIRCUIT CIRCUIT CIRCUIT CIRCUIT CIRCUIT CICEUIT CIRCUIT R FXD MET FLM 560 OHM 2X 1 4W BOARD ASSY POWER SUPPLY FILTER BOARD BLANK PC C FXD ELECT 10 35VDCW C FXD CER 2000 PF 80 20 1000VDCW CER 2000 PF 80 20 1000VDCW C3FXD ELECT 47 UF 5 20VDCM C FXD ELECT 47 UF 5 20VDCM ELECT 1UF 10 35V0CW COIL FXD RF 1 UH COIL FXD RF UH COIL CHOKE 180 UH SX Section VI Parts Table 6 1 Reference Designation Index Cont d sms C1 0150 0122 CER 2000 PF 20 500VOCM C2 0150 0122 C3FXD CER 2000 PF 20 500VDCW 0150 0122 C FXD CER 2000 PF 20 500VDCW J2 1250 0102 CONNEC TOR BNC J3 1251 1915 BOOY R P CONNECTOR 14 CONTACTS 1 1120 1495 ME TER 0 1MA 1 1500 0014 COUPLING BELLOWS MP2 2190 0325 WASHER FLAT FOR 1 4 HOW MP3 2190 0325 WASHER FLAT FOR 1 4 HOW MP4 2190 0325 SHERSFLAT FOR 1 4 HPS 219
5. Section VI Parts 00000 00136 00213 00287 00334 00348 00373 00656 00773 00781 00815 00853 00866 00851 00329 01002 01009 01121 01255 01281 01295 01349 01589 01930 91961 02114 02116 02286 02660 02735 02771 0277 03508 03705 03797 93877 03888 03954 04009 04013 04062 04222 04354 04404 0465 04713 04732 04773 94795 04811 94870 04919 05006 95271 05347 Table 6 3 Code List of Manufacturers The following code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks 4 1 Name to Code and H4 2 Code to Name and their latest supplements The date of revision and the date of the Supplemenis used appear at the bottom of each page suppliers not appearing in the H4 Handbooks Manufacturer Address U S A Common Any supplier ol U S McCoy Electronics Mount Holly Springs Pa Sage Electronics Cer Rochester R Y Cemco Inc Danielson Conn Humidial Cotton Catit Microtion Co inc Valley Stream N Y Garlock inc Aerovor Corp Chersy Hill N J New Bedford Mass Amp Inc Harrisburg Aircrafi Radio Boonton N J Northern Engineering Laboratorres Inc Burlington Wis Pickens Div Pickens 5 of industry Cal Los Angeles Calif Livingston N J Capacitor Dent Hugson Falls N Y Brockton Mass Milwaukee Wis Beverly Hills Calif Lawndale Calif Sangamo Electic Cc Engineering
6. 05257 60001 BOARD ASSY REGULATOR PULSED RF 05257 20007 BOARD BLANK 0180 0387 C FXD ELECT 47 UF 5 20VDCW 0160 3060 C FXD CER 0 1 UF 20 25 0180 0116 C FXD ELECT 6 8 UF 10 35VDCW 0180 0116 C FXD ELECT 6 8 UF 10 35YDCW 0180 0116 C FXD ELECT UF 10 35VDCW 6 8 0180 0116 C FXD ELECT 6 8 UF 10 35VDCM 0180 0116 ELECT 6 8 UF 10 35VDCH 0150 0093 C FXD CER 0 01 UF 80 20 LOOVDCW 0150 0093 CER 0 01 UF 80 20 LOOVOCH 0180 0116 C FXD ELECT 6 8 UF 10 35 0 0150 0093 CiFXD CER 0 01 UF 80 20 100YDCW 0150 0093 0180 0116 0180 0116 CER 0 01 UF 80 20 100YDCw ELECT 6 8 UF 102 35YOCW C FXD ELECT 6 8 UF 10 35VDCH 1902 0685 DIODE BREAKDOWN 9 0V 22 1902 0686 0100 BREAKDOWN 6 2V 21 9140 0138 COIL CHOKE 180 UH 5 9140 0138 9140 0138 COIL CHOKE 180 UH 5 COIL CHOKE 180 UH 51 1853 0036 TRANSISTOR SILICON PNP 245906 1853 0036 TRANSISTOR SILICOUN PNP 2N3906 1854 0221 TRANSISTOR OUAL SILICON NPN 1853 0020 TRANSISTOR SILICON PNP 1853 0020 TRANSISTOR SILICON PNP 1853 0020 TRANSISTOR1SILICON PNP 1853 0036 1854 0221 1854 0215 1854 0215 1853 0036 TRANSISTOR SILICON 255906 TRANSISTOR DUAL SILICON NPN TRANSISTOR SEfILICON NPN 2N3904 TRANSTSTORISILICON NPN 2N3904 TRANSISTOR SILICON PNP 2N3906 1853 0036 TRANSISTOR SILICON PNP 255906 I 1854 0215 TRANSISTORISILICON NPN 253904 1854
7. 1962 Section p Parts Table 6 3 Code List of Manufacturers Cont d e Manufacturer Address General Atronics Corp Execulone inc Philadelphia Pa Long Island City N Y Falaw Beating Co The New Britain Conn Fansteel Metallurgical Corp N Chicago ill British Radio Electronics Ltd Washington D C G E Lamp Division Nela Park Cleveland Ohio West Concord Mass Memcor Inc Comp Div Huntingtos Ind Gres Reproducer New Rochelle N Y Grobet File Co of Amenca tac General Radio Co Carlstadt N J Lancaster Pa Palo Alto Calif Kenilworth N J Owensboro Ky Chicago 111 Hamilton Watch Co Hewlett Packard Co Heyman Mig Co G E Receiving Tube Dept Lectiohm Inc Stanwyck Coil Products Ltd Hawkesbury Ontario Canada Cunningham W H amp Hill Ltd Toronto Ontario Canada P R Mallory 8 Co Inc Indianapolis Ind Mechanical industries Prod Co Aktion Ohio Miniature Precision Bearings Inc Keene N H Mute Co Chicago 10 Norgren Co Englewood Cola Ohmite Mfg Co Skokie 111 Penn Eng amp Core Doylestowa Pa Polaroid Cora Cambridge Mass Precision Thermometer amp inst Co Southampton Pa Waltham Mass Westminster Md Waltham Mass Selma N C Simpson 53 Chicago IH Sonotene Elmsford N Y Raytheon 77452 Agparatus 8 Systers So Norwalk Conn Spaulding Fonte Cc Tonawanda N Y Sprague Eteciic Co North Adams M
8. NOIS 1 2 E A frms f Bic VN Beg fx Nfy HP 5210A Weave DISCRIMINATOR ANALYZER Section HI Operation TIME BASE determines frequency resolution A TIME BASE of 1 ms provides 1 kHz resolution the 1 count of the last digit inthe display This time base is generally suitable for the whole frequency range from 05 to 18 GHz with 8 digit readout counters In the microwave range where this degree of resolution is not required a 0 1 ms TIME BASE will shorten counting time and give a 10kHz resolution Likewise on lower frequencies the TIME BASE can be lengthened forthe maximum resolution the 8 digit readout allows 3 13 CONTROLS AND INPUTS 3 14 GENERAL The function of the front panel tuning control input connector mode selector level control meter and pulsed rf output connector are described in Paragraphs 3 15 through 3 22 3 15 INPUT CONNECTOR Signal input impedance is 509 nominal for connectionto an unknown frequency source The connector is a precision N type female connector An exploded view of the input connector is shown in Figure 6 1 Changing two parts of the as sembly converts the type to the APC 7 or vice versa See Paragraphs 3 24 and 3 25 for allowable input voltages 3 16 FREQUENCY MHz CONTROL The dial reads the VFO frequency For convenience however the counter readout provides the sampling frequency measurement used for calculations Do not use the dial reading for calcul
9. 18 GHz CHECK 1 With test equipment connected as above set Signal Generator frequency to 18 GHz at 16 dBm e 2 Adjust LEVEL ADJ for 0 35 V peak to peak on Oscilloscope 3 Set 5257A MODE to PULSED RF and adjust FREQUENCY for maximum meter deflection with Counter reading close to 125 MHz 4 Adjust Signal Generator output for 9 10 full scale on 5257A meter o Power Meter should read 4 dBm or less 6 Set 525A MODE to APC and adjust FREQUENCY for phase lock observe zero beat e on Oscilloscope OSCILLATOR STABILITY 1 Set Counter TIME BASE to 1 sec 2 Set 5257A MODE to PULSED RF and adjust FREQUENCY for 100 MHz 3 Record Counter readings at intervals of one minute for three minutes 4 Frequency change should not be greater than 2 kHz 5 Temperature should be constant at a value between 0 and 55 C e Section Maintenance Troubleshooting Figure 5 2 Top Bottom and Side Internal Views Secuon Maintenance and Troubleshooting Table 5 4 Troubleshooting Chart GATE EXTENDER CHECK No readout Counter Gate light does not cycle check A9 A10 Thumbwheel switch settings OK on 05 2 GHz range only or all other ranges but not both check A9 Counter Gate light eycles SAMPLING Not sampling Switch to PRF Mode Readout check A1 2 3 4 5 4 e iii Q6 41 amp 2 CHECK Al A2 A7Q4 Q6 2 18 GHz ranges only No readout check
10. Division ct Speer Carbon lt lt Du Bois Fanchig Carerz amp Inst Cots Space amp Defense System Div Paramus N J Magune 12225165 Inc Greenwich Conn Sylvania Etecino Prod Inc Elecugzio Tute Division Astiga Cor East Hartson Swatcheratt ic Chicago Il Metals Zosucis iar Spencer Products Attledero Mass Ph lips Adsarce Contin C Johet Ili Reseaicz 5 Corp Madison Wis Rotron C inc Woodstock N Y Vector Etectionio Co Glendale Cali Emconum FSC ranodcon Supplements H4 1 Dates AUGUST 1966 H4 2 Dateg NOV 1962 6 21 Section VI Parts Table 6 3 Code Code No Manufacturer Address No 33058 Fastener Cambridge Mass 91418 81086 New Hampshire Ball Bearing Inc 91506 Peterborough 91637 82125 General instrument Corp Capacilor Div 91662 Darlington 5 91737 83148 ITT Wie and Cable Div Los Angeles Calif 91827 83186 Victory Eng Corp Springfield N J 91886 83258 Bendix Corp Red Bank Div Red Bank N J 91929 83315 Hubbell Corp Mundelein 83330 Smith Herman H Inc Brooklyn N Y 91961 83332 Tecn Labs Palisade s Paik N I 92180 83385 Central Screw Co Chicago IH 92367 83501 Gavitt Wire and Cable Co 92607 Div of Amerace Corp Brookfield Mass 33594 Burroughs Corp Electronic Tube Div 32102 Plainfield N J 32966 81140 Unson Carbide Corp Consumes Prod Div 93332 New York N Y 83777 Model Eng and Mig tnc Hu
11. Page 5 4 Table 5 3 ADJUST MENT 6th sentence Change to read With 5257A controls set as above adjust A4R10 through top center reading on meter Page 5 8 Delete Figure 5 2 Bottom and Sides Internal View Add Figure 7 1 Bottom and Sides Internal View Page 6 3 Table 6 1 Delete 4 05257 60038 BOARD ASSY APC 1 Add A4 05257 60005 BOARD ASSY APC 1 Delete A1R17 0757 0895 FXD MET FLM 62 OHM 2 1 4W Add A1R17 0757 0898 R MET FLM 82 OHM 2 1 4W Delete A1R24 0698 6283 R FXD COMP 5 1 8W Page 6 8 Table 6 1 Delete 7 05257 60044 VFO LINEAR IZER ASSY INCL 2 ATA3 Add A 05257 60018 VFO LINEAR IZER ASSY INCL 1 ATAS Pages 6 10 Table 6 1 Delete A7A3C9 0150 0011C FXD TI 1 5 PF 10 500VDCW Add 9 0150 0028 C FXD TI 1 10 500VDCW Pages 6 15 Table 6 1 Delete Ali 05257 60031 BOARD ASSY POWER SUPPLY FILTER Add A11 05257 60011 BOARD ASSY POWER SUPPLY FILTER Delete A12 05257 60032 BOARD ASSY MASTER INTERCONNECTOR Delete A13 05257 60033 CABLE ASSY THUMBWHEEL SWITCH Delete C1 0160 2327 C FXD CER 1000 PF 20 100VDCW Add C1 0150 0122 C FXD CER 2000 PF 209 500VDCW Page 8 5 Figure 8 3 Al Pulse Driver schematic Delete A1R24 Change CI to 2000 PF Page 8 6 5th paragraph Change to read APC adjustment A4R10 is accessible through the top cover plate This control is set to give mid scale meter reading in the APC mode wi
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13. 2 15 Modifications 2 16 When Model 52574 is used with an HP 5245L Counter having a serial prefix number between 402 and 516 A22R38 on 5245L Gate Control Assembly 5243A 65R should be changed to 4700 ohms HP Part No 0683 4725 2 17 When Model 5257A is used with an HP 5245L Counter with serial prefix 335 and below HP 5245L must be modified A Modification Kit HP Part No 05243 6030 is available from your Hewlett Packard Sales and Service office complete with instructions for modification NOTE HP 5245L Counters displaying the sticker ACCEPTS HP MODELS 5251 THRU 5256 inside the plug in compartment do not require the modifications listed in Paragraph 2 17 2 1 Model 5257 Section III Operation SECTION III OPERATION 3 1 DESCRIPTION 3 2 Model 5257A Transfer Oscillator plug in unit increases to 18 GHz the frequency measuring capability of Hewlett Packard counters 5245L M 5246L 5247 5248L M and 5345A The measured frequency is displayed on the counter for all types of radio frequency carriers including cw fm and pulsed Controls and jacks are des cribed in detail in Paragraphs 3 13 through 3 22 Step by step operating procedures are given in Figures 3 9 and 3 10 3 3 An internal VFO tunable from 66 to 133 3 MHz functions as a transfer oscillator to reduce the input frequencies to within the counter s input fre quency limitations The VFO frequency is high to maintain a 66 7 MHz or mor
14. 4 19 Sampler 4 21 Automatic Phase Control Assembly 4 4 26 Regulator and Pulsed RF Output Assembly 5 4 32 Automatic Phase Control Assembly 6 4 37 Variable Frequency Oscillator Assembly 7 4 41 Prescaler and Inhibit Assembly 8 4 45 Gate Time Extender A9 4 54 Preset Decade Assembly A10 MAINTENANCE AND TROUBLESHOOTING introduction Assembly Connection and Identification Assembly Designations Recommended Test Equipment In Cabinet Performance Check Troubleshooting Gear Train Removal and Replacem Troubleshooting Aids Gate Extender Check Sampling Check PRF With Fx Input Check APC With Fx Input Check Aland 2 Check Input Resistance Check A3CR1 and A3CR2 Check Sensitivity Check Gear Train Removal 5 40 Gear Train Replacem ent REPLACEABLE PARTS 6 1 Introduction 6 4 Ordering Information MANUAL CHANGES 7 1 Manual Changes ft Fo aos I I_ 411 WHOA AAA Cn 00 eer eee ie O OE PO NI NI PO CO We eva d 7 2 Current Instruments 7 4 Older Instruments 7 6 Newer Instruments CIRCUIT DIAGRAMS 8 1 Introduction TE N 4 2 wil e TA Q3 0006 DI B2 fO N 2 9 1 m Page 1 4 I 1 I 1 1 1 t t k 1 r UA A
15. FLM 5 62K OHM 1 1 8W R FXD FLM 4 7K OHM 2 1 4W R FXD MET FLM 1K OHM 1 1 8W R FXD MET FLM 1 1K OHM 2 1 4W R FXD MET FLM 750 OHM 2 1 4W R FXD MET FLM 180 OHM 2 1 4W R FXD MET OX 68 OHM 5 1W R FXD MET FLM 750 OHM 2 1 4W R FXD FLM 33K OHM 2 1 4W R FXD MET FLM 20K 2 1 4W R FXD MET FLM 10K 2 1 4W Section VI Parts Table 6 1 Reference Designation Index Cont d 0757 0424 R FXD 1 10 OHM 1 1 8W 6 2K OHM 2 1 4W 10K OHM 2 1 44 OHM 1 1 8N 15K OHM 2 0757 0943 R FXD MET 0757 0948 R FXD MET 0757 0280 R FXD MET 0757 0952 R FXD MET 0757 0938 R FXD MET 3 9K OHM 25 1 4w 0757 0938 R FXD FLM 3 9K OHM 2 1 4 0757 0924 R FXD MET FLM 1 0K OHM 2X 1 4w 0757 0958 R FXD MET FLM 27K OHM 2 1 4W 0757 0934 R FXD MET FLM 2 7K OHM 28 1 4W 0757 0934 FLM 2 7K CHM 2 1 49 757 0939 R FXD MET 4 3K OHM 22 1 44 0757 0939 R FXD FLM 4 3K GHM 2X 1 48 05257 60001 80ARD ASSY PRESET DECADER 05257 20001 BOARD BLANK 10 81 1901 0040 DIODE SILICON 30MA ALOCRZ 1901 0040 1901 0040 ALOCR4 1401 0040 ALOCRS5 1901 0040 ALOCRE 1901 0040 DIODE SILICON 30MA DIODE SILICON DIODE SILICON 30MA DIODE SILICON 30MA DIODE SILICON 30MA ALOCR7 1901 0040 AlOCR8 1901 0040 DIODE SILICON 30MA OIODE SILICON 30MA AlOICI 1820 0399 INTEGRATED CIRCUIT AlOIC2 1820 0399 INTEGRATED CIRCUIT 101 3 1820 0399 INTEGRATED CIRCUIT
16. Manual Changes Table 7 1 8 Prescaler Assembly 05257 60013 9 Reference Designation Part No Description Note 0150 0093 0160 3277 0140 0220 0160 3277 0180 0230 0 01 UF 80 20 100YDCW C FXD CER 01 UF 20 50VDCW C FXD MICA 200 PF 5 300VDCW C FXD CER 01 UF 20 50VDCW C FXD ELECT 1 0 UF 20 SOVDCH 0160 2327 C FXD CER 1000 PF 20 75VDCW 0160 2327 0160 3277 0160 2327 C FXD CER 1000 PF 20 75VDCW C FXD CER 01 UF 20 50VDCW C FXD CER 1000 PF 20 75VOCW 0150 0093 0150 0093 0150 0061 0160 2327 0160 2327 0150 0093 0150 0035 0160 2327 0150 0093 0150 0093 C FXD CER 0 01 UF 80 20 100VDCW CIFXD CER 0 01 UF 80 20 100VDCW C3FXD CER 20 PF 10 100VDCW C FXD CER 1000 PF 20 75VDCW CER 1000 PF 20 75VDCW C FXD CER 0 01 UF 80 20 100VDCW C FXD CER 20 PF 10 600VDCW C FXD CER 1000 PF 20 5YDCW CER 0 01 UF 80 20 100V0CW CER 0 01 UF 80 20 100VDCW 0150 0093 0150 0093 0150 0093 0180 0116 9160 2321 CiFXD CER 0 01 UF 80 202 100VDCW C FXD CER 0 01 UF 80 20 100 CER 0 01 UF 80 20 100 ELECT 6 8 UF 10 35VDCW C FXD CER 1000 PF 20 T5VDCM 0150 0093 0150 0053 0150 0093 0150 0093 0150 0093 C FXD CER 0 01 UF 80 20 100VDCW C FXD CER 0 01 UF 80 20 100VDCW CER 0 01 UF 80 20 100VDCH e C FXD CER 0 01 UF 80 20 100VDCW C FXD CER 0 01 UF 80 20 100VDCW 1912 0025 DIODE GERMANIUM TUNNEL 10M
17. Telex 18 34 05 Hewlett Packard Vertriebs GmbH Herrenbergerstrasse 110 07030 Bibliagen W rttemberg Tel 070314871 Cable HEPAG B blingen Telex 72 65 739 Hewlett Packard Vertriebs GmbH Vogelsanger Weg 38 04 Dusseldert Tel 0211 63 80 31 35 Telex 85 86 533 Hewlett Packard Vertriebs GmbH Tel 0411 24 05 51 52 Cable HEWPACKSA Hamburg Telex 21 53 32 CEYLON United Electricats Ltd Box 681 Yahala Building Stapies Street Colomba 2 Tek 5496 Cable HOTPOINT Colombo CYPRUS Kypronics 19 Gregorios amp Xenopoulos Road 0 Box 1152 Nicosia Tel 6282 75628 Cable HE I NAMI ETHIOPIA African Saiespower amp Agency Private Ltd Co P 0 Box 718 58 59 Cunningham St Addis Ababa Tei 12285 Cable ASACO Addisababa MONG KONG Schmidt amp Co Hong Kong Ltd Box 297 1511 Prince s Building 15th Floor 10 Chater Road Hong Keng Tet 240168 232735 Cable SCHMIDTCO Hong Kong INDIA Star Lic Kasturi Buildings Jamshedji Tata Rd Bembsy 206R india Tei 29 50 21 Telex 2156 Cable BLUEFROST Blue Star Ltd Band Box House Prabhagev 250 Tel 457301 Telex 2156 Cable 8LUESTAR Blue Star Ltd 14 40 Civil Lines Kanpur india Tel 6 88 82 Cable BLUESTAR India Blue Star Lte 7 Hare Street 506 Calcutta 1 1 Tel 23 0131 Teles 655 BLUESTAP Reginfriedstrasse 13 Ds M nchen 9 Tei 0811
18. UNLESS OTHERWISE INDICATED CAPACITANCE INDUCTANCE MICRONENRIES 142 1854 0221 AND 028 AND ANO OIIB ARE MATCHED PAIRS 1 2 1854 0221 OUTPUT ro AG 00 45007 012 REG An HV REG Faure 555 DESIGNATIONS b In OSCILLATOR 2 enueN OMEUIAYIS A quiassy 72 andi Section VIII Circuit Diagrams operates at either the VFO frequency or 1 4 the VFO frequency Al gives the signal that generates the sampling pulses via the stripline pulse generator A2 In the 05 2 GHz range 15 V is removed from CR1 CR2 and and applied to CR4 and CR5 so that only the VFO signal that is divided by 4 is allowed to trigger the pulse driver The reverse occurs on all other ranges R17 is selected for best sensitivity at 18 GHz Its value ranges from 822 to 2402 The signal at Q6 collector is about 6 volts peak to peak AI PULSE DRIVER _ y FROM 3 P P3 P o A7 FROM 3 5 p p 17 MHz 2 1 5 5 V p p 17 MHz A2CR1 open 4 V p p 17 MHz after 200 resistor A2 generates pulses that drivethe sampling diodes A2CRI canbe open circuited by turningthe plastic screw above it ccw This will simulate a non sampling condition as shownby waveform 4A The A2 output waveform 5 canno
19. 0698 6648 2 0698 6649 R FXD COMP 390 OHM 5 1 8W 28480 0698 6649 1 0698 6681 R FXD COMP 9 1 OHM 5 1 8 28480 0698 6681 1 0157 0200 R FXD MET FLM 5 62K OHM 1 1 8W 28480 0757 0200 1 0757 0280 R FXD MET FLM 1K OHM 1 1 8H 28480 0757 0280 2 0757 0337 R FXD FLM 432 OHM 1 l 4W 28480 0757 0337 1 0757 0346 R FXD FLM 10 OHM 1 1 8W 28480 0757 0346 1 0757 0379 R FXD MET FLM 12 1 OHM 1 1 84 28480 0757 0379 1 0751 0424 R FXD FLM 1 10K OHM 1 1 8W 28480 0757 0424 1 0757 0482 R FXD MET FLM 511K OHM 1 L BW 28480 0757 0482 2 0757 0893 R FXD MET FLM 51 OHM 2 1 4W 28480 0757 0893 7 0757 C858 R FXD FLM 82 OHM 2 1 4 128480 0757 0898 2 0757 0899 R FXD MET 91 OHM 2 1 4W 28480 0757 0899 1 8 0757 0900 R FXD MET FLM 100 OHM 28 1 49 28480 0757 0900 3 0757 0904 R FXD MET FLM 150 OHM 2 1 4W 128480 0757 0909 21 6751 0905 R FXO MET FLM 160 OHM 2 1 16 28480 0757 0905 2 0757 0906 R FXD MET FLM 180 OHM 2 1 58 28480 0757 0906 1 0757 0909 R FXD MET FLM 240 OHM 2 1 4 128480 0757 0909 1 0757 0914 RzFXD MET FLM 390 OHM 22 1 4W 28480 0757 0914 4 0757 0915 R FXD MET FLM 430 OHM 2 1 4W 28480 0757 0915 2 0757 0917 R FXD FLM 510 OHM 2X 1 4 28480 0757 0917 4 0757 0918 R FXD MET FLM 560 OHM 2 1 48 28480 10757 0918 1 0757 0920 R FXD MET FLM 680 OHM 2 1 44 28480 0757 0920 2 0757 0921 R FXD MET FLM 750 OHM 24 1 4 28480 0757 0921 6 o 0751 0922 R FXD MET FLM 820 OHM Z1 1 4W 28480 0757 0922 2
20. 0757 0923 R FXD MET FLM 910 OHM 2 1 44 28480 0757 0922 4 0757 0924 RIFXD MET FLM 1 0 OHM 2 1 48 28480 0757 0924 8 0757 0925 R FXD MET FLM 1 1K OHM 2 1 64 28480 0757 0925 7 0757 0926 R FXD MET FLM 1 2 OHM 2 1 4W 28680 0757 0926 5 0757 0927 R FXD MET 1 3K OHM 2 1 4 128480 0757 0927 4 0757 0929 R FXD FLM 2 6 2 1 44 28480 0757 0929 1 0757 0930 R FXD MET FLM 1800 OHM 2X 1 44 28480 0757 0930 2 0757 0931 R FXD FLM 2 3K DHM 22 1 4W 28480 0157 0931 6 0757 0932 R FXD MET FLM 2 2K OHM 2 1 44 28480 0757 0932 1 0757 0934 R FXD FLM 2 7K OHM 2 1 4W 28480 0757 0934 9 0757 0935 R FXD MET FLM 3 0K DHM 2 1 48 28480 0757 0935 5 0751 0936 R FXD FLM 3 3K OHM 2 1 4W 28480 0757 0936 1 0757 0938 R FXD MET FLM 3 9K OHM 2 1 5w 28480 0757 0938 7 0757 0939 R FXD MET FLM 4 3K OHM 2X 1 44 28480 0757 0939 8 757 940 R EXD MET FLM 4 7K OHM 2 1 44 28480 0757 0940 0757 0941 R EXD FLM 5 1K OHM 2 1 48 28480 0757 0941 8 0757 0942 R EXD MET FLM 5 6K OHM 2 1 48 28480 0757 0942 5 See list of abbreviations in introduction to this section 6 16 Table 6 2 Replaceable Parts Cont d 0757 0943 R FXD MET FLM 6 2K OHM 2 1 4w 0757 0944 R FXD MET FLM 6 8K OHM 2 1 4w 0751 0945 R FXD MET FLM 7 5K OHM 27 1 48 0757 0946 R FXD MET FLM 8 2K OHM 23 1 4w 0757 0948 RIFXD 10K OHM 2X 1 4W 28480 28480 28480 28480 28480 Mtr M r Part No 1 0757 09 3
21. Inc Pico Rivera CTS Corp Elkhart ind ITT Cannon Electric inc Los Angeles Calif Cinema Div Aerovox Corp Burbank Cali Clare amp Co Chicago itl Centralab Oiv of Globe Union Inc Milwaukee Wis Chicago Ill New York N Y Commercial Plastics Co Cornish Wire Co The Coto Co Inc Providence 8 1 Chicago Miniature Lamp Works Chicago ill Cinch Mfg Co Howard B Jones Div Chicago Ill Dow Corning Corp Midland Mich Electro Motive Mfg Co Inc Willimantic Conn Dialight Corp Brooklyn N Y Indiana General Electromes Div Keasby N J General Instrument Corp Div Newark N J Drake Mfg Co Harwood Heights Hi Hugh Eby Inc Philadelphia Gudeman Co Chicago 111 Robert M Hadley Co Los Angeles Cali Ene Technological Products Inc Ene Hansen Mfg Co Inc Princeton ind Harper Co Chicago Helipot Div of Beckman Inst Inc Fullerton Calif Hughes Products Division of Hughes Aircraft Newoort Beach Amperex Elect Co Hicksville t I N Y Bradiey Semiconductor Corp Haven Conn Casing Electric Inc Hartford Coan Circle F Mfg Cc Trenton N J George Garrett Div MSL Industries Inc Philadelphia 24 Federal Sciew Products inc Chicago li Fischer Special Mfg Co Cincinnati 2700 General industues Cs Tne Elyna Ino Goshen Stamping 8 Tosi Cc Goshen in 160 Electronics Coro Srookiyn N Y
22. de Equipamentos El ctricos SAR Rua de Barbosa Rodrigues 42 41 Box 6487 Lusada Cable TELECTRA Luanda AUSTRALIA Hewlett Packard Australia Pty Ltd 22 26 Weir Street Glen iris 3146 Yictoria Tel 20 1371 6 lines Cable HEWPARD Melbourne Teiex 31024 Hewlett Packard Australia Ltd 61 Alexander Street Crews Nest 2065 New South Wales Tel 43 7366 Cable HEWPARD Sydney Telex 21561 Hewlett Packard Australia Pty Ltd 97 Churchill Road Prespect 5082 South Australia Tel 65 2366 Cadie HEWPARO Adelaide Hewiett Packard Australia Pty Ltd 2nd Floor Sulte 13 Casablanca Buildings 196 Adelaide Terrace Perth W A 6000 Tet 21 3330 Cable HEWPARD Perth Hewlett Packard Australia Pty Ltd 10 Woolley Street P O 191 Dicksea A C T 2602 Tei 49 8194 Cable HEWPARD Canberra ACT Hewlett Packard Australia Pty Ltd 75 Simpsons Road Bardon Queensiand 4068 Tel 36 5411 ELECTRONIC Hewlett Packard France 4 Quai des Etroits 69 Lyon Sime Tet 78 42 6345 Cable Telex 31617 Hewlett Packard France 29 rue de ta F 31 Ulagnec Tel 61 46 82 29 Telex 51957 Lyon GERMANY Hewlett Packard Vertriebs GmbH Berliner Strasse 117 Postfach 560 40 06 Nieder Eschbach F m 56 Tel 0811 SO 10 64 Cable HEWPACKSA Frankfurt Telex 41 32 49 FRA Hewlett Packard Vertriebs GmbH Wiimersderfer Strasse 113 114 0 1000 Berlia w 12 Tel 0311 3137046
23. fy 122000 x 9 1100000 kHz 3 31 VERIFICATION OF HARMONIC NUMBER N 3 32 The transfer oscillator method of measuring frequencies higher than the counter s capability re quires that harmonic number N be known exactly Since there are many harmonics to choose from the operating procedures in Figures 3 9 and 3 10 outline a foolproof method of verifying the selected harmonic number In use harmonic number N is either in creasedor decreased by 1 onthethumbwheel switches and the internal VFO is retuned for zero beat or phase lock at an adjacent harmonic to match the change on the switches Thus the measured frequency displayed is the same in both cases if the choice was correct 3 5 Section Operation Figure 3 9 Pulsed RF and FM Measurement 5245L ELECTRONIC COUNTER siwar gt CAUTION Do not apply more than 10 dBm 2 V peak to peak to 5257A INPUT connector Turn power on by turning SAMPLE RATE con trol cw out of POWER OFF Set switch on Counter to PLUG IN Set switch on Counter to FREQUENCY Set switch on Counter to 0 1 ms Note Other gate times may be used Turn 5257A LEVEL control fully ccw Connect signal to be counted to 5257A IN PUT fx Set MODE switch to PULSED RF Set RANGE switch to correct range for input frequency Set N switches to 001 Tune FREQUENCY dial for maximum meter reading Turn LEVEL control cw for meter reading of 9 10 full scale Read sampl
24. 0053 TRANSISTOR SILICON NPN 2N2218 1 1853 0020 TRANSISTOR SILICON 1853 0010 TRANSISTOR SILICON See introduction to this section for ordering information Section VI Parts 0 Table 6 1 Reference Designation Index Cont d 581 0757 0938 R FXD MET FLM 3 9K OHM 2X 1 59 A5R2 0157 0948 R FXD MET FLM 10K OHM 2X 1 4 ASR3 0757 0944 RIFXD FLM 6 8K OHM 2 1 59 4584 0757 0948 R FXD MET FLM 10K OHM 2 1 44 ASRS 0757 0948 RIEXD MET FLM 10K OHM 25 1 4W 586 0757 0944 R1FXO MET FLM 6 8K OHM 2X 1 4 ASR 0757 0940 R FXD MET FLM 4 7K OHM 2 1 59 ASRS 0757 0972 R3FXD FLM LOOK DHM 2 1 4 589 0683 1065 R FXD COMP 10M OHM 5 1 44 ASRLO 0757 0935 RIFXD FLM 3000 OHM 2 1 4M ASRI1 0757 0941 R FXD MET FLM 5100 OHM 2 1 4 ASRI2 0751 0917 FLM 510 OHM 24 1 4 45813 0757 0946 R FXD MET FLM 8200 OHM 2X 1 4 ASR14 0757 0917 R FXD MET FLM 510 2 1 5 ASR15 0757 0935 RiFXD MET FLM 3000 OHM 2 1 48 5816 0757 0935 R FXD MET FLM 3000 OHM 2 1 4 5617 0757 0965 RIFXD MET FLM 51K OHM 2 1 9 5 18 0757 0917 RIFXD MET FLM 510 OHM 2 1 44 A5R19 0757 0926 R FXD MET FLM 1200 OHM 2 1 ASR20 0757 0934 R FXD FLM 2700 OHM 2X 1 48 ASRZ1 0757 0921 RIFXD FLM 750 OHM 2X 1 44 ASR22 0757 0921 R FXD FLM 750 OHM 2 1 4W ASR23 0757 0934 R FXD MET FLM 2700 OHM 2 1 48 ASR24 0757 0930 R FXD MET FLM 1800 OHM 2 1 44 ASR25 0757
25. 05257 60003 Prescaler and Inhibit 05257 60039 9 Gate Time Extender 05257 60002 A10 Preset Decade 05257 60001 05257 60031 05257 60032 05257 60033 All Power Supply 12 Master Interconnector Thumbwheel Cable 5 11 TROUBLESHOOTING 5 12 Troubleshooting aids are given in Paragraphs 5 15 through 5 37 5 13 GEAR TRAIN REMOVAL AND REPLACEMENT 5 14 Instructions on gear train removaland replace ment are given in Paragraphs 5 38 through 5 43 5 15 TROUBLESHOOTING AIDS 5 16 If instrument is not operating properly refer to troubleshooting chart Table 5 4 and perform the following checks as necessary Also refer to schematic diagrams and waveforms given in Section Use extender to make waveform and voltage checks on circuit boards that plug in to 12 and 15 pin connectors 5 17 Gate Extender Check 5 18 VFO assembly and 8 prescaler assembly must be operating to complete this test a Set Counter controls as follows SENSITIVITY PLUG IN TIME BASE zs 0 1ms FUNCTION FREQUENCY b Set 5257A controls as follows FREQUENCY 100 MHz MODE el 2 PULSED RF thumbwheels 001 RANGE any range above 05 2 GHz 9 19 With controls set as in 5 18a and b adjust thumbwheels from 001 to 009 001 002 etc Counter should read 100 MHz to 900 MHz in steps of 100 MHz a Adjust thumbwheels from 010 to 090 Counter should read 1000 MHz to 9000 MHz in steps of 1000 MHz b Ad
26. 0934 R FXD MET FLM 2700 OHM 2 1 4 5826 0757 0893 R FXD MET FLM 51 OHM 21 1 48 45827 0757 0929 R FXD FLM 1600 OHM 2 1 4w ASR28 0757 0960 R FXD MET FLM 100 OHM 2 1 4W A5R29 0757 0942 R FXD MET FLM 5600 OHM 2 1 48 5830 0757 0950 R FXD MET ELM 12K OHM 2 1 59 ASR31 0757 0893 RiFXD MET FLM 51 OHM 2 1 48 A5R32 0757 0943 R FXD MET FLM 6200 OHM 2 1 4 ASR33 0757 0948 R FXD MET FEM 10K OHM 2 1 4M e 05257 60006 BOARD ASSY APC 2 05257 20006 BOARD BLANK PC A6C1 0180 0291 C FXD ELECT 1UF 10 35VDCW A6C2 0160 0174 CER 0 47 UF 80 20 25VDCW A6C3 0180 0387 C FXD ELECT 47 UF 51 20VDCW 0180 0228 CiFXD ELECT 22 UF 10 15VDCW 6 5 0140 0192 C FXD MICA 68 PE 5 300VDCW A6C6 0160 2205 C FXD MICA 120 PF 5 ASC 0160 0174 CER 0 47 UF 80 20 25VDCK A6C8 0180 0195 C FXD ELECT 0 33 UF 20 35VDCW See introduction to this section for ordering information Section VI Parts Table 6 1 Reference Designation Index Cont d 0160 0939 FXO MICA 430 5X 300 VOCW 0160 3060 C FXD CER 0 1 UF 20 25VDCW 0180 0387 CiFXD ELECT 47 5 20VDCW 0160 0147 C FXD MICA 2500PF 2 300YDCH 0160 0207 CtFXD MYLAR O O1UF 5 200VDCW 0160 0196 C FXD MICA 24PF 5 300VDCW 1901 0040 DIODE SILICON 30MA 30NV 1901 0040 DIODE SILICON 30MA 30WV 1901 0040 DIODE SILICON 30MA 30WV 1901 0040 DIODE SILICON 30MA 30WV 1901 0040 DIODE SILICON 30MA 30WV e 1901 0040 DIODE SILICON 30MA 30WV 1901 0040 DIODE SILICON 30MA 30
27. 11314 11534 11711 11717 11870 12136 12861 12574 1269 12728 12859 12881 12330 1794 13103 11396 13835 15039 12193 11296 24433 13324 15476 15466 15583 15873 18911 13315 19589 29684 19701 Alphabetical codes have been arbitrarily assigned to Monufocturer Address Bay Slate Electronics Corp Waltham Mass Teledyne Inc Microwave Div Palo Alto Calif National Seal Downey Calif Duncan Electronics Inc Costa Mesa Calif General Instrument Corp Semiconductor Div Products Group Newark Imperial Electronic Inc Buena Park Calil Melabs inc Palo Atto Calif Philadelphia Handie Camden N J Grove Mfg Co Inc Shady Gtove Pa Gutton tnd Inc Data System Div Albuquerque Dover N H Haven Conn Tokyo Japan Clark N J Newport Beach Cail Scoltsdale Arizona Clarostat Mfg Co Elmar Filier Corp Nippon Electric Co Lid Meter Electonics Corp Delta Semiconductor Inc Dickson Electronics Thetmotloy Dallas Texas Teleiunken GmbH Hanover Germany MiCtand Wright Ore of Pacific industines Inc Kansas City Kansas Newbury Park Calil Calif Resistor Corp Santa Monica Calif Components inc Conshohocken Pa ITT Semiconductor A Div of Int Telephone Telegraph Cote West Palm Beach Fia Hewleti Packaid Company Loveland Colo Cornel Dubtier Electric Corp Newark N Corning Glass Works Corning N Y Electro Cube I
28. 15 volts is removed from CR1 CR2 and This opens the signal path and clamps it to ground This actionturns off the input from A3P3 At the same time the 15 volts turns CR4 on and CRS off so the prescaled VFO signal appears at Q1 base 4 16 Amplifiers Q1 and Q2 are feedback amplifiers for low impedance drive to 93 Q3 and Q4 raise the levelof VFO signals and drive the 05 and Q6 wideband driver stage which is essentially a current mode switch configuration This high level Q5 and Q6 driver turns on and off at the frequency of the input signal forming steep sloped square waves for driving strip line pulse generator 2 Auto transformers 1 and T2 couple between Q4 and Q5 and Q6 and pulse gen erator A2 respectively Because of the high frequency pulse components generated in this assembly both the 13 volt and 15 volt dc power lines are isolated by pi filter networks consisting of bypass capacitors and a filter coil 4 17 PULSE GENERATOR A2 4 18 CRlina stripline assembly is drivenby pulse amplifierAl throughC1 is independently mounted betweenthe assemblies CRlis a step recovery diode which has the unique property of conducting for a few nanoseconds after the driving signal reverse biases the diode junction and then turning off sharply This characteristic generates the pulses for sampler drive They go through R1 to A3 sampler assembly 4 19 SAMPLER A3 4 20 The sampler is designed for harmonic mixing of very
29. 200 MHz with an 80 mV input signal CRI Q3 provide a current source for differen tial amplifier Q1 and 02 is a Schmitt Trigger which sharpens the waveform for divide by two integrated circuits U2 and U3 The square waves out of U3 4 and 6 and 1 4 of the input frequency Emitter followers Q5 06 level shift those DIFFERENTIAL SCHMITT AMPLIFIER TRIGGER 67 133 2 VFO INPUT 21 FROM A7 Q2 VIA P3 R Ji FROM 6 6 5V ENABLE 7V INHIBIT 8 14 square waves Which are then amplified by Q4 and AT In the APC mode when the VFO is not phase locked an INHIBIT signal from the A6 assembly will prohibit the counted signal at the output of the prescaler from being applied to the counter The TV INHIBIT signal from A6 is applied to 08 turning it on During the time Q8 is on there is a short circuit to ground through C8 Q8 and C9 at the counted frequency If the VFO becomes phase locked a 15V ENABLE signal from the A6 assembly cuts off Q8 and the counted signal is coupled through C7 to the counter In the Pulsed RF mode of operation the input to Q8 is always 15V 22 6 Section VIII Circuit Diagrams A9 gives startand stop signals for Counter gating receives reset period gate enable gate inhibit and holdoff from Counter The output period is N on the 05 2 GHz range with pin 4 grounded On all other ranges the output period is 4N with pin 4 ungrounded
30. 21 DIODE BREAKDOWN 6 2V 2 DIODE BREAKDOWN SILICON 4 53Y DIODE GERMANIUM TUNNEL 10MA 28480 04713 04713 28480 28480 R VAR WW SK OHM 10 LIN 1 28 28480 R VAR WW 5K DHM 3 LIN 1W 28480 WASHER FLAT FUR 1 4 HDW 00000 WASHER SPRING STL WAVY TYPE 28480 SWITCH R TARY 28480 SWITCH THUMB WHEEL 28480 SHITCH 28480 CONTACT SLIOING 28480 COUPLER SHAFT NYLON 28480 WIRE 24 1 6 LONG 28480 COIL FXD 0 05 UH 20 36196 COIL FXD 0 33 UH 10 36196 CDIL FXD 0 22 UH 10 99800 COIL FXD RF 1 UH 28480 COIL CHOKE 180 UH 5 128480 COIL FXD RF 1 10 99800 CORE FERRITE BEAD 0211 HUB BUSH ING 28480 RETAINER DIAL 28480 BOARD BLANK PC 128480 BOARD BLANK 28480 BDARD BLANK 28480 BOARD BLANK PC 128480 BOARD BLANK PC 28480 BOARD BLANK PC 128480 BOARD PC 128480 8OARD BLANK PC 28480 BOARD BLANK 28480 BOARD BLANK PC 28480 BOARD BLANK 128480 BOAROZBLANK PC 128480 PANEL FRONT 128480 HOLDER SIRIP LINE 28450 GEAR POT DRIVE 28480 BOARD ASSY PRESET DECADER 28480 BOARD ASSY GATE EXTENDER 28480 BOARD ASSY2 VFO BOARD ASSY VFO LINEARIZER BOARD ASSY3APC 1 BOARD ASSY APC 2 BOARD ASSY REGULATDR PULSED RF 28480 28480 28480 BOARD ASSY PULSE DRIVER BOARD ASSY PULSE GENERATOR BOARD ASSY POWER SUPPLY FILTER BOARD ASSY VFO CONTROL Mfr Part No 2N3922 1901 0040 1901 0175 1901 0567 1901 0573 1901 0581 1 938 1 825 1802 3079 1912 00
31. 69 59 71 75 Cable HEWPACKSA M nchen Telex 52 49 35 GREECE Kostas Karayaenis 18 Street Athens 126 Tel 230301 3 5 Cable RAKAR Athens Telex 21 59 62 RKAR GR IRELAND Hewlett Packard Ltd 224 Bath Road Slough Buchs Engiand Tel Slough 753 33341 Cable HEWPIE Slough Telex 84413 ITALY Hewiett Packard Italiana S p A Amerigo Vespucci 2 20124 Milano Tei 2 6251 10 lines Cable HEWPACKIT Milan Telex 32046 Hewlett Packard Italiana S p A Palazzo Italia Piazza Marconi 25 00144 Rome Eur Tel 6 591 2544 Cable HEWPACKIT Rome Tetex 61514 Blue Star Ltd Blue Star House 34 Ring Road Lajpat Magar New Delhi 24 india Tet 62 32 76 BLUESTAR Blue Star Ltd 17 6 Ulsoor Road Bangalore 8 Blue Star Ltd 96 Park Lane Secunderabad 3 indi Tel 7 63 91 Cabie BLUEFROST Blue Star tid 23 24 Second Line des Madras 1 india Tel 2 39 55 Telex 379 Cabte BLUESTAR Blue Star Ltd 18 Kaiser Bungatow Dindii Road Jamshedgur india Tei 38 04 Cable BLUESTAR INDONESIA Bah Bolon Trading Coy 5 Dialah Merdeka 79 Bandung Tel 4915 51560 Cable ILMU Telex 809 IRAN Telecom Ltd P 0 Box 1812 240 Kh Saba Shomai Teheran Tei 43850 48111 Cable BASCOM Tenerar ISRAEL Electronics amp Engineering Div of Motorola Israel 10 17 Aminadav Street Tel Aviv Tei 36941 3 lines Cable BASTEL Tel Aviv Tetex Bastel Tv 033 566 JAPAN Y
32. 8 12 0160 2205 C FXD MICA 120 5 300VDCW 128480 0160 2205 11 0160 2327 C FXD CER 1000 PF 20 TSVDCM 128480 0160 2327 24 0160 2060 C FXD CER 0 1 UF 20 25VDCW 166289 3 42 6 0180 0097 ELECT 47UF 10 35VDCW 56289 1500475 903552 1 018C 0100 C FXD ELECT 4 7UF LO 35VDCW 56289 1500475X903582 d 0180 0116 C FXD ELECT 6 8 UF 10 35VDCW 56289 1500685 403582 12 6180 0160 C FXD ELECT 22UF 35VDCM 56289 1500226X0035R2 i 0180 0195 C FXD ELECT 0 33 UF 20 35VDCW 56289 1500334 0035 2 1 0180 0218 C FXD ELECT 15 UF 10 35VDCW 56289 1500154 5035 2 4 0180 0228 C FXD ELECT 22 UF 107 15VOCW 128480 0180 0228 i 0180 0230 C FXO ELECT 1 0 UF 201 SOVDCH 128480 0180 0230 2 0180 0291 C FXD ELECT LUF 10 35VDCW 165289 1540105 9035 2 6 0180 0387 C FXD ELECT 47 UF 5 20VDCW 28480 0180 0387 5 C370 0472 KNOB RED BAR 128480 0370 0472 l 0370 0139 KNOB RED ROUND 1 8 SHAFT 28480 0370 0139 1 0370 0463 KNOB BLACK ROUND 128 80 0370 0463 1 0370 0464 KNOB BLACK ROUNO 28480 0370 0464 1 0370 0419 KNOB BLACK POINTER 28480 0370 0479 1 i 0675 2321 8 5 0 COMP 3 3K OHM 10 1 84 28480 0675 3321 1 0683 1055 R FXD COMP MEGOHM 5 1 48 01121 1055 1 2683 1065 R FXD COMP 10M OHM SY 1 4W 01121 8 1065 1 0698 3111 R FXD CUMP 30 OHM 5 178W 128480 0698 3111 1 0698 3113 R FXD CARBON 100 57 1 8W 28480 0698 3113 2 C698 3114 R FXD COMP 300 OHM 5X 1 88 28480 0698 3114 1 0698 3375 R FXD COMP 33 OH
33. A3 SAMPLER ATTENUATOR ASSY FROM sme SAMPLER GENERATOR 901 0573 q SHORTED STUB 3 0525 6031 ATTENUATOR 1 pem CRI cn2 1 I J Lod dan I NOTES I REFERENCE DESIGNATIONS WITHIN THIS ASSEMBLY ARE ABBREVIATED ADD ASSEMBLY NUMBER TO ABBREVIATION FOR COMPLETE DESCRIPTION 2 UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS CAPACITANCE IN PICOFARADS INDUCTANCE MICROHENRIE S 3 AND 028 AND 06B AND ARE MATCHED PAIRS RESI RI NCE DESIGNATIONS NETT 4 va SHIELD 4 A4 AUTOMATIC PHASE CONTROL ASSEMBLY 05257 60038 NOTE 1 SERIES 976 _ GAIN AMPLIFIER na 2 R34 4814 3000 3900 RIT 4600 O FERENCE pi 221 2 1855 0038 1855 0038 OUTPUT c2 FOLLOWER _D O JUF REFERENCE 08 TO ASIA m 1 8 i A TO MODE 15 5 SWITCH SIDF 3 INPUT 1 2 1854 0221 JV REG R35 OV REG 135 2 1 INTE J3V REG Q6A 1 2 1854 0221 OV REC R37 16K Q6B 1 2 1854 022 QIIB 1 2 1854 0221 4 8 3V REG G SIGNAL 6 OUTPUT ro A quiassy OV REG FROM AS 7 012 JV REG A6 10 AS 10 1894 0071 QIUF T 4 4 J3V REG FILTER m ww J nREG JV REG 0 130UF
34. AMPLIA 2000 owe 020 0003 2 zie on ca R n fout 333 rr ma anita anos sutun i 1 t nj gq l I PRESCALLA amp 9 029 gt e a 3 m sasueyd enuen HA uorioeg PRESCALER AND INHIBIT ASSEMBLY 05257 00I3MMOTE 11 SERIES 820 _ DIFFERENTIATING gt DAER AMAL FER jn NANT DRIVER AMPLIFIER NOTES OF IEA nes annar AIR I 10 BAR scm come SN NON a musi On PCOS ama SNC TANCE sy arc RO S Y SST ETAT def RAGI VALUES 920 aman y QUIPUT AMENA mes 004 320 100 6 07 1854 0075 154 0073 mr 4 3 B ow Qu Martii lo Is 020 wse Rs y sv Je A N de 487 27 4 WA R nj bese 99 o 5 z J a 126 be I e gt 1 I i 3 I 1 sesuey uono s Section VII
35. AMTRACO Seoul LEBANON Constantin E Macridis Clemencesu Street P 0 7213 Beirut Tei 220846 Cable ELECTRONUCLEAR Beirut MALAYSIA MECOMS Malaysia Ltd 2 Lorong 13 64 Section 13 Petaling Jaya Selenger Cable MECOMB Kuala Lumpur MOZAMBIQUE N Goncalves LOA 41 Apt 14 Av D Luis P 0 107 Laurence Marques Cable NEW ZEALAND Hewlett Packard N 2 110 32 34 Terrace 0 Box 9443 Cable MEWPACK Wellington Hewlett Packard N 2 Lta 51092 Pakur angs Tet 573 733 INSTRUMENTATION SALES AND SERVICE EUROPE AFRICA ASIA AUSTRALIA SWEDEN Hewlett Packard Sverige Enighetsv gen 1 3 Fack 5461 20 Gremes 20 Tel 08 8 12 50 Cable MEASUREMENTS Stockholm Telex 10721 Hewlett Packard Sverige Hagahersgatan C Bex 4023 S 431 04 M lndal 4 Tet 031 27 68 00 Telex 21 312 SWITZERLANO Hewlett Packard Schweiz Zwrcherstrassa 20 CH 8952 Schlieren Zurich Tel 051 98 18 21 24 Cable HPAG CH Telex 3933 Hewlett Packard Schweiz AG Rue du Bols du Lan 7 1217 Meyrin 2 Geneve Tei 022 41 54 00 Cable HEWPACKSA Geneva Telex 2 24 6 TURKEY Telekom Engineering Bureau Box 376 Karshoy Istanbol Tel 49 40 40 Cable TELEMATION Istantui PAKISTAN EAST Mushko amp Company Lic Zirst Chambers 31 Jianah Avenue Dacca Tel 280058 Cable NEWDEAL Dacca PAKISTAN Mushko amp Company 1
36. APC mode all circuits in the 3257A are being used except AS peak holding circuit 5 28 Set LEVEL control clockwise with no input signal Check to see that meter is at midscale If meter is not at midscale adjust A4R10 refer to APC adjustment Page 5 4 Apply input signal and adjust LEVEL control for 9 10 full scale on meter Set MODE to APC select the appropriate range for input frequency used and set FREQUENCY for lock If phase lock cannot be obtained check A4 and 5 29 A1 and A2 Check 5 30 there is no sampling check 1 and A2 Re move side cover for access to these assemblies Refer to Section VIII forwaveforms This is a critical area and is often the cause of no sampling Obtain sampling before continuing tests Remember that a shorted stripline cannot be detected by a waveform An open step recovery diode can be found and replaced Note that the diode is spring loaded and the sliding contact over the spring is cut to fit Do not exert too much pressure on plastic screw as diode may crack Apply just enough to obtainthe desired waveform Do not attempt to solder or unsolder parts on 2 5 31 Input Resistance Check 5 32 Check the resistance from the center ol Lhe INPUT connector to ground This should be 509 29 See 1 and CR2 check Paragraph 5 33 Section V Maintenance and Troubleshooting 5 33 A3CR1 and A3CR2 Check CAUTION The sampler diodes can be damaged by either 0 2 erg static discharge o
37. Cc Carl E Holmes Cor Mecrolab inc General Electric Aiden Products Co Alien Bradley Co Litton industries inc TRW Semiconductors Inc Texas tnstiyments Inc Transistor Products Div The Alliance Mfg C Retays inc Amerock Corp Pulse Engineering Cc Ferroxcube Corp o 7erca Wheelock Signais 15 Cale Rubber and Plastics inc Sunnyvale Calif Amphenol Borg 1 25 012 Chicago HH Radio Corp of Semiconcuctor and Matenals Div Somerville N Vocaline Co of ce Inc Ole Saybrook Conn Sar Fernando Cant Der Syracuse Dayton Ohio Compton Calif Wakefield Mass Cedar Knolls N J Dallas Texas Allrance Ohio Van Nuys Calif Rockford 111 Santa Clara Calif Saugerties N Y Long Branch N J Hopkins Engineerisz Semiconcucio Apex Machine amp To Etdema Corp Transitton Electric Pyrotilm Resisto C Ic Senger Co Diehl D Finderne Plant Sumesvitle N J Hart and Elect Co Harttord Conn Lambertville R J Great Neck N Y Tautus Corp Arco Electronic inc tir Q Division of Aerva uyrile Beach S C Precision Paper Tuse Cc Wheeling il Dymec Division cf Seasett Pacaard Co Palo Alto Cali Sytvansa Electric 22 515 Microwave Device Div Mountain View Calif Motorola Inc Ser cazuela Proc Div Phoenix Arizona Fattron Co Inc tester City Cati Northlake H
38. Circuit Diagrams Section VIII Circuit Diagrams Figure 8 1 Schematic Diagram Notes SYMBOLS SWITCH DESIGNATIONS FRONT PANEL REAR PANEL KNOB CONTROL A3SIBR 2 1 2 SCREWDRIVER ADJUST MAIN SIGNAL PATH FEEDBACK PATH SWITCH 51 WITHIN ASSEMBLY CONDUCTING ELEMENT WIPER MOVES TOWARD CW WHEN CONTROL 15 ROTATED CLOCKWISE 2ND WAFER FROM FRONT POWER LINE GROUND A 1ST ETC CIRCUIT COMMON GROUND TEST POINT REAR OF WAFER F FRONT AND GATE INHIBIT GATE 2 1 2 TERMINAL LOCATION 23 VIEWED FROM FRONT OR GATE WAVEFORMS SHOWN ARE TYPICAL REFERENCE DESIGNATIONS REFERENCE DESIGNATIONS WITHIN ASSEMBLIES ARE ABBREVIATED ADD ASSEMBLY NUMBER TO ABBREVIATION FOR COMPLETE DESCRIPTION ASSEMBLY ABBREVIATION COMPLETE DESCRIPTION 25 C1 25 1 25 1 CRI A2SA1CR1 NO PREFIX J3 J3 Assembly Stk No Assembly Series No Assembiy Assembly inciudes A25A1 used to document 1 changes s A25 POWER SUPPLY _ASSY os100 6007 SERIES 330 12 mounted on RECTIFIER ASSY 13 not mountec Assembly A25 I Assembly 7 on Assembly A25 Numbers indicate Part of A25 Pio Pins of 2 42 2 6 3V supplied from JS to Pin 6 of PI on Assembly AS Figure 1 3 Figure 7 4 A4 Component Locator A11 Component Locator Section VII Manual Changes Section VII Manual Changes Figure 7 5 8 Component Locator HEWLETT ARD MANUAL CHANGES
39. E F HP 614A HP 620B HP 5245L HP 10503A HP 10506B HP 11500A HP 1250 0781 HP P281B HP 1250 0180 HP 628A HP 616B HP 1250 0749 HP P752A HP 11503A HP 5060 0049 HP 5060 0092 L Sd Di zt RA os taking place Possible causes 1 A2CRI open 2 shorted stripline See waveforms and notes on assembly Al and A2 in Section VII Sampling and non sampling waveforms for AS are found in Section VIII c There will be no signal present if A3CRl is open d If 1kHz osc isbad on A4 this test will not work The above test has checked the following assemblies and components attenuator A4Q11 Q5 and A7Q5 and Q7 A8Q8 were checked in 05 2 GHz range only 5 23 PRF With Fx Input Check 5 24 This test requires an input of 0 dBm Adjust FREQUENCY control and set LEV EL control for 9 10 full scale on meter Set RANGE switch to appropriate range for input frequency used Set thumbwheels to 001 and observe zero beat on oscilloscope If no meter reading is obtained with zero beat on oscilloscope and meter should be checked 5 25 If there is no indication on meter or oscilloscope Fx is not getting through With an HP 412A measure the resistance from the center of the INPUT connector to ground It should be 509 420 An incorrect reading here indicates a sampler or attenuator problem and a factory repair will be required 5 26 APC With Fx Input Check 5 27 Inthe
40. EJ L E Oscillator Stability Check Deviation less than 2 kHz in 3 minutes Second Check Date FREQUENCY Diai Check Counter reads 100 MHz Counter Gate Extension OK 50 MHz Check Meter reads 9 10 with 7 dBm input 200 MHz Check Meter reads 9 10 with 7 dBm input 1 GHz Check Meter reads 9 10 with 7 dBm input 4 GHz Check Meter reads 9 10 with 7 dBm input 8 GHz Check Meter reads 9 10 with 7 dBm input Pulsed Carrier Check Meter reads 5 10 with 5 us pulse 15 GHz Check Meter reads 9 10 with 4 dBm input 18 GHz Check Meter reads 9 10 with 4 dBm input Oscillator Stability Check Deviation less than 2 kHz in 3 minutes 5 4 PERFORMANCE CHECK TEST CARD DESCRIPTION Third Check FREQUENCY Dial Check Counter Gate Extension 50 MHz Check 200 MHz Check 1 GHz Check 4 GHz Check 8 GHz Check Pulsed Carrier Check 15 GHz Check 18 GHz Check Oscillator Stability Check Fourth Check FREQUENCY Dial Check Counter Gate Extension 50 MHz Check 200 MHz Check 1 GHz Check 4 GHz Check 8 GHz Check Pulsed Carrier Check 15 GHz Check 18 GHz Check Oscillator Stability Check 5 4b Date Counter reads 100 MHz OK Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 5 10 with 5 us pulse Meter reads 9 10 with 4 dBm input Meter
41. IC2 Q goes high one half cycle 4P later output IC2D 8 abruptly changes from high to low As a result 910 generates a negative stop pulse to P6 22 and the counter stop circuit Less than 150 microseconds later the hold off pulse from the counter appears and disables these gates and resets the IC s for the next counting period Note that the coincidence pulse which enabled the stop circuit through gate IC2D also disabled the start gate IC3C through inverter IC3D and gate IC3A 4 51 When range switch 5115 placed inthe 50 to 200 MHz position 4 2 is grounded to eliminate the 4P period The groundis applied toIC2B 12 inverter and its output 11 goes high This allows period P signal from IC2A to inverted by 2 and provides a signal of period P to preset decade 10 Output pulses from 2 are applied to start stop gates and IC2D Their operation is as previously de scribed in Paragraph 4 51 for the 4P period 4 52 RESET AMPLIFIER PNP transistor 98 is driven at its base with a negative spike from the counter at P6 44 Q8 base voltage is unclamped from the 4 volt supply by CR3 and gives an output pulse The output pulse goes to the thumbwheel switches to reset the preset decade assembly at the end of sampling time 4 53 4 VOLT POWER SUPPLY The 13 volt line is dropped to 4 volts by R7 and 05 Voltage divider R1 and R3 places 2 volts onQ2 base Voltage divider R12 and R15 places 42 volts onQ3 ba
42. Jennings Radio Corp jan Jose Call Gioov Pin Corp Ridgefield J Signalile Inc Neptune J J H Winns and Sons amp inchester Mass Industrial Condenser Corp Chicago R F Products Division of Amznenot Borg Electronics Core Danbuty Conn E F Johnson Co Waseca Mina International Resistance Cc Fnuadetphia 23 CTS Knights Inc Sandwich ii Kulka Electuc Corporation tt Vernon ti Y Lenz Electric Mfg Co Chicago Littleluse Inc Sas Planes i Lord Mig 2 C W Marwedel San Francisco t General Instrument Corp Division James Millen Co Inc Walden Mass J Miller Co 125 Angeles Calit Ciach Monagnock Div ol yniteg Carr Fastener Corp Can Leandro Ca Mueller Electac Cievetand 0130 National Union Sewan Cc The Bendix Cors 5 Div R Hrt wenc Facitic Metals c San Francisco Pnanostran Instrument and Electronic South Pasadena Monufocturer Address Philadelonta Steel and Wire Corp Philadelphia Pa Amencan Machine amp Foundiy Co Potter amp Biumfield Orv Princeton Ind TRW Electronic Components Div Camden N J General Instrument Rectifier Div Brooklyn N Y Resistance Products Co Harnsbuig Pa Rubbercraft Corp of Torrance Calif Division of Illinois Tool Works Elgin HI New York Pil
43. LEVEL ADJ control The output of A4 goes to 5 and assemblies A5 dc amplifier provides the sampler output waveform at front panel jack J2 A5 peak hold ing circuit develops a dc voltage proportional to the amplitude of the beat signal from the sampler with pulsed rf input signals This level is amplified and applied to meter when operating PULSED RF MODE Inthe APC mode the meter is switched directly to A4 dc amplifier for reading the phase error of the phase lock loop 4 7 variable gain amplifier in 4 includes reference voltage to establish 0 phase error in the phase lock error voltage loop In the APC mode a 1 kHz oscillator is turned on and its signal is injected into the phase lock loop at the reference mode The 1 kHz signal appears at the output of sampler A3 and is taken from this point by a kHz filter located in A4 for amplification and level detection in assembiv phase iock has not occurred this signal is below the required detection level and the signal to the counter is inhibited by the inhibit amplifier in A8 Therefore the counter readout is all zeros When phase lock is achieved the 1 signal is above the required level and the inhibit to the counter is re moved for a frequency readout In the PULSED RF mode the inhibit amplifier is biased to continually pass the counter input signal Figure 4 1 Functional Block Diagram INPUT SAMPLER A3 PULSE FIL
44. R FXD COMP 620 OHM 5 1 8W R FXD COMP 620 OHM 5 1 8 R FXD MET FLM 15K OHM 2 1 4W R FXD MET FLM 2 7K OHM 2 1 4W R FXD MET FLM 10K OHM 2 1 4W R VAR WW 1000 OHM 5 19 SWITCH BOARD 55 CONTROL BOARD BLANK PC CiFXD MICA 130PF 5X 300VDCW C FXD CER 1000 PF 20 T5VDCW C VOLTAGE VAR 6 8 PF 10 C VOLTAGE VAR 6 8 PF 10 DIDDE SSILICON 1541 COIL ASSY VFO R FXD MET FLM 511K OHM 1 1 8N R FXD MET FLM 8200 OHM 2 1 4W RIFXD MET FLM 511K OHM 15 1 8W R3FXD MET FLM 2200 OHM 2X 1799 BOARD 55 BOARD BLANK C FXD CER 0 1 UF 201 25VDCw CiVAR 3 5 53 5 PF C FXD CER 1000 PF 20 75VDCH CiFXD TI 2 PF 5X SOOVDCH C FXD 3 9 10 S00VOCW C FXD CER 1000 PF 20 T5VOCW CER 1000 PF 20 TSVOCW See introduction to this section for ordering information Section VI Parts CI Nee 6 9 Section VI Parts Table 6 1 Reference Designation Index Cont d 0160 0183 C2FXD MICA 130PF 5 300VDCW ATA3CS 0150 0011 C FXD T1 1 5 PF 10 500VDCW 10 0160 2321 C FXD CER 1000 PF 20 75VDCW 11 0160 2327 C FXD CER 1000 PF 20 T5VDCW 12 0160 2327 C FXD CER 1000 PF 20 75VDCW 0160 2327 C FXD CER 1000 PF 20 75VDCW 14 0140 2327 C FXD CER 1000 20 T5VDCW 15 0160 2327 C FXD CER 1000 PF 20 75 16 0150 0029 C FXD TI 1 PF 10 500VDCW 17 0150 0029 C FXD TI 1 PF 10 SOOVOC
45. a common emitter am plifier which completes the oscillator loop 4 25 DC AMPLIFIER Q8 Q11A is the upper section and Q9 Q11B the lower section of a balanced amplifier Due to coupling of the emitters between sections the outputs of the upper and lower halves are equal and out of phase Q8 and 09 are emitter followers for both the de error voltage on the loop and the ac beat frequencies the PULSED RF MODE From 98 ac beat frequencies are applied to 5 8 through 4 3 for input to the pulsed rf output amplifier From Q9 ac beat frequencies are applied to AS 10 through A4 6 for the peak holding circuit which drives the meter in the PULSED RF MODE Input to 10 range compensation is also taken from 09 is the dc amplifier for meter drive in the APC Mode Q11B provides circuit balance Section IV Theory 4 26 REGULATOR AND PULSED RF OUTPUT ASSEMBLY AS 4 27 PULSED RF OUT Terminal A5 8 connects the base input of amplifier Q10 to the upper section of the dc amplifier in APC assembly 4 Q10 isan emitter follower and its output is ac coupled through C10 to the BNC jack labeled PULSED OUT 4 28 PEAK HOLDING CIRCUIT Terminal A5 10 connects the base input of 01 to the lower section of the dc amplifier in assembly 4 91 92 are an ac amplifier for the beat frequency signal They pro vide a peak to peak signal of sufficient amplitude for peak holding circuit operation The peak hold
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47. by model number and the full eight digit serial number 2 7 ENVIRONMENT Conditions during storage and shipment should normally be limited as follows a Maximum temperature 167 F 75 b Minimum temperature 40 F 40 C CAUTION TURN COUNTER POWER OFF BEFORE IN STALLING OR REMOVING FREQUENCY CONVERTER 2 8 INSTALLATION 2 9 Model 5257A plugs into the rectangular compartment at the right hand side of the front panel of the Electronic Counter install unit in counter first check that retaining latch is turned fully counter clockwise then push unit firmly into compartment until front panelof plug in is flush with front panel of counter Then turn retaining latch clockwise until it is tight 2 10 To remove unit from counter turn retaining latch counterclockwise to its stop Then grasp input connector and oscillator knob and firmly pull unit from counter If any difficulty is encountered with installation or removal check that retaining latch is fully counterclockwise 2 11 Power Requirements 2 12 All electrical power required to operate the Model 5257A is supplied by the counter in which the unit is installed 2 13 Electrical Connections 2 14 The INPUT and PULSED RF OUT connectors on front panelof plug in see Figure 3 9 are the only external electrical connections to the unit other connections are made through the 50 pin connector at the rear of plug in when installed in counter
48. circled points in A9 schematic Figure 8 9 Highand low are logic designations for a positive voltage high of 4 volts and zero voltage low re presenting logic 1 and logic 0 respectively Waveforms acu staRT SWEEP PERIOD INPUT HOLDOFF wide i EL ALESANCO 4 5 Section IV Theory The counter period signal has a time determined by the counter TIME BASE selector This signal is applied to PNP transistor Q4 base which amplifies and invertsthe signal Whenthe input square wave goes positive Q4 turns off CR2 prevents Q7 base from swinging below ground Q7amplifies again inverts period P signal and shifts the signal level tobe compatible with the logic states 0 to 4 0 volts 4 48 A schematic of IC logic parts is shown in Figure 4 3 Frequency division is performed by in tegrated circuit flip flops and IC4 Between counting periods the hold off pulse from the counter is a positive level applied through R9 to Q6 base Q6 inverts the input so its output is low near 0 volts This voltage applied to IC1 Sp sets IC1 output Q high or logical 1 This high applied to IC4 sets IC2 output Q low or logical 0 When the hold off input goes low 0 volts the count period begins Q6 output rises positive to enable gates IC2A 2 and 1 and removes the 0 volt set level from Sp and IC4 Cp They can now change their binary states with changing input level
49. high frequency and microwave signals The assembly consists of a 6 dB attenuator for the input signal hot carrier diodes CR1 and CR2 sampling capacitors C1 and C2 and shorted stubs The pulse train representing the VFO harmonics from pulse generator 2 switch diodes CR1 and CR2 on and off with a 180 phase difference The hot carrier diodes have picosecond switching times and can sampie signals as high as 18 GHz A driving pulse closes switch CRI and a sampl is taken C1 charges to some fraction of the input voltage according to the phase relationship of the input signal with the Sampling pulse CR2 switching out of phase with CR1 charges C2 the opposite polarity from C1 Thus phase detection results when the two outputs are combined at the input phase control assembiy 4 4 21 AUTOMATIC PHASE CONTROL ASSEMBLY A4 4 22 VARIABLE GAIN AMPLIFIER The outputs from sampler through isolation resistors R1 and R2 are combined at the gate of Q2A The Q2A gate input is the summing junction for the two sides of the sampler and the resultant voltage is the algebraic sum of the voltages A3C1 and A3C2 Q2A Q2B are a matched pair of field effect transistors FET s packaged in a single can FET Q2A is a source follower comparabletoan emitter follower transistor circuit which presents a high input impedance for minimal loading on the sampler Bipolar transistor Q3 is in emitter follower circuit w
50. of CdS photoresistors These were connected to form a binary to decimal decoder to drive a nixie tube Inside the block there are 8 neons From the top they are C B D D A A according to the manual The neon wires are soldered to the PCB On top of the block is the thick film LDR array and on top of that is a resistor network of 10 270k resistors The top wire of that goes to the 20V rail the wires on the left go to the nixie cathodes there s a 270k resistor from each cathode to 20V LDRs also connect to the cathodes The bottom wire from the resistor network is not used but the pin it s connected to is the common of the LDR array and goes to 130V I can provide a pinout of the 15 pin card edge but the signals may not be too obvious without the complete service manual Pin 1 is towards the front nixie tube end 130 170V Transfer Input latch enable BCD Output A Signal Input Gate Input Not used BCD Output B Signal Output to next decade 20V Reset Input BCD Output C BCD Output D 15V e 50 3 WN I O PHYSICAL DIAGRAM SIDE VIEW ASITAL DISPLAY BE URI S RC IT A CLIAMIZ BALE B ELECTRICAL DIAGRAM HIY errraty EN 15 DISPLAY c f N 666646 66 m And from Dave Brown regarding model numbers The DCAs Decimal Counter Assembly in those counters 52
51. of the part vacuum tube neon bulb photoceil etc voltage regulator cable socket crystal tuned cavity network rack mount anly root mean square reverse working voltage slow blow screw selenium section s semiconductor silicon silver alide spring special stainless steel split ring steel tantalum time delay toggle thread titanium talerance trimmer traveling wave tube micro 10 6 variable de working volts with watts working inverse voltage wirewound without Section VI Parts Table 6 1 Reference Designation Index Reference Designation ap Part No Description 8 05257 60008 BOARD ASSY PULSE DRIVER 05257 20008 BOARD BLANK 0160 2143 C FXD CER 2000 80 20 1000VDCW 0160 2143 C FXD CER 2000 80 20 1000VDCW 0160 2143 CER 2000 PF 80 20 1000VDCW 0160 2143 C FXD CER 2000 PF 80 203 1000VDCM 0160 2143 C FXD CER 2000 PF 80 20 1000YDCH 0160 2143 C FXD CER 2000 PF 80 20 1000VDCW 0160 2143 C FXD CER 2000 80 20 1000VOCH 0160 2143 C FXD CER 2000 PF 80 20 1000VDCW 0160 2143 C FXD CER 2000 80 20 1000VDCW 0150 0011 C FXD TI 1 5 PF 20 500VDCH 0160 2143 CER 2000 PF 80 20 1000VDCW 0160 2143 C FXD CER 2000 PF 480 2023 1000VDCW 0160 2143 C f XD CER 2000 PF 80 20 1000VDCH 0160 2143 C FXD CER 2000 PF 80 20 1000VD
52. sampling fre quency They actuate switches which preseta counter decade assembly in the Model 5257A to extend the counter gate inincrements of units tens and hundreds At a setting of 001 the counter reads the sampling frequency N 1 3 20 LEVEL ADJ This control adjusts amplifier gain to compensate for wide variations in input signal levels and the wide frequency range of the instrument Initially LEVEL ADJ is turned fully counterclockwise and after tuning to zero beat it is turned clockwise until the meter reads at the red division line 3 21 RANGE Range is selected with the black knob which is concentric with the MODE switch knob It includes four ranges 05 2 GHz 2 1GHz 1 4 GHz 4 18 GHz This switch compensates the phase lock loop for the wide frequency range of the instrument 3 4 Model 5257 It also selects a gate time extension factor for the counter the scale is IN in the 05 to 2 GHz range and 4N in the higher ranges 3 22 PULSED RF OUT This BNC connector goes to the sampler output circuitry It may be used for applications other than frequency measurement such as down conversion to extend the frequency range of low frequency instruments oscilloscope may be connected for viewing the sampler output waveform during zero beat tuning in the PULSED RF MODE 3 23 INPUT VOLTAGES 3 24 MAXIMUM INPUT VOLTAGE The maximum input voltage must not be exceeded to prevent hot carrier diode
53. the Schmitt trigger The Q and Q outputs of U3 are square waves of opposite polarity between 16 7 and 33 MHz which is the input frequency divided by 4 95 and Q6 are emitter follower level shifters to the output amplifiers Q4 and Q7 which also provide iso lation of the two prescaler outputs Figure 4 2 FIRST 2 OUT CONDITION COUNTER BASE TIME O IMS THUMBSWITCH DOS SWEEP 0 2 8 VERNIER FOR Sum POSITIVE SYNC PULSE SYNC FROM COLLECTOR A906 Section Theory 4 44 INHIBIT AMPLIFIER The Inhibit input from A6 is applied to the base of Q8 In the Pulsed RF mode there is bias current through R2 and Q8 is cut No inhibit signal is present and the prescaler output is applied to the counter In the APC mode the inhibit signal is present 08 is turned on and the output signal at Q7C is shorted to ground through low impedance bypass Q8 When phase lock occurs the APC mode the inhibit signal again goes low Q8 is turned off and the prescaler output signal is applied to the counter 4 45 GATE TIME EXTENDER 9 4 46 Enable voltage plug in bias is applied to 01 base when the counter FUNCTION switch is turned to PLUG IN Q1 conducts andits collector voltage rises to 15 volts The 15 volts is the supply for Q9 and 010 CRI turns on and applies 15 volts to gate inhibit line P6 23 4 41 Waveforms at key points in the gate time tender are shown in Figure 4 2 Waveform numbers refer to
54. the input fre quency which aids tuning and allows measurement of noisy frequency modulated and rapidly drifting signals A lock detector for cw signals causes the counter to display all zeros until the Model 5257A is properly tuned to phase lock The Model 5257A has a frequency range from 50 MHz to 18 GHz and replaces several narrower range units It also has the advantage of measuring a specific frequency while rejecting sidebands and spurious signals 1 3 The instrument uses a wideband sampler to compare the input signal waveform with the internal VFO This eliminates the need for a harmonic gen erator following the VFO and requires far less power than other methods In operation the VFO is tuned to a subharmonic of the input signal to produce voltage at the sampler output when the input and internal waveformsare coincident each time the sampling gate opens The automatic phase control circuit operates from this de voltage The circuitry has a wide capture range and it is only necessary to tune through the proper frequency and the VFO will lock in There fore tuning is rapidand uncritical If thelock is lost due to an intermittent signal the Model 52574 will automatically relock when the signal again appears 1 4 Thefront panel meter deflectionis used toadjust input signal level to detect zero beat for both cw and pulsed rf measurements and to observe the dc error voltage in the phase lock loop The meter eliminates the
55. vice versa Network CR3 R4 and C2 sets the limits of swing on the VFO and provide an improved sinusoidal waveshape at the VFO output The anode of CR3 is approximately 2 volts and prevents the signal on the cathode of CR3 from going more negative than 2 7 volts 4 40 VARIABLE FREQUENCY OSCILLATOR Q1 and Q2 are a modified Colpitts oscillator circuit with a tank consisting of tuning inductor L1 special air dielectric tuning capacitor C2 and feedback capacitors C4 and C5 Q2 adds current gain in the feedback loop Q1 emitter and raises the Q of the tank circuit because of the high impedance of Q2 base Q3 is a buffer to reduce the effect of load variations upon the oscillator Buffer amplifiers 04 06 and Q5 Q7are identical These are feedback type circuits to drive the 50 ohm output lines through transformers T1 and T2 4 41 PRESCALER AND INHIBIT ASSEMBLY A8 4 42 DIFFERENTIAL AMPLIFIER AND SCHMITT TRIGGER The prescaler input is a 67 to 133 MHz signal from the VFO assembly A7A3 This signal is capacitively coupled through C2 into differential am plifier Q1 and 02 and Q3 provide a current source for the differential amplifier The output of Q1 is input to integrated circuit Schmitt trigger U1 R8 provides 2 broad bias adjustment for U1 4 43 BINARIES LEVEL SHIFT AND OUTPUT AM PLIFIER Binary counter integrated circuits U2 and U3 accept the direct coupled positive spikes from
56. well as for visual zero beat tuning in the PULSED RF mode This jack makes available the amplified sampler output for connection to other equipment In the frequency measurement of pulsed rf signals an oscilloscope can be used to supplement the meter tuning indicator Typical waveforms ob served in tuning for zero beat are shown in Figure 3 4 Indown conversionthe transfer oscillator and sampler produce signals suitable for driving low frequency equipment Figure 3 5 isa block diagram showing the set up for measuring fm demodulation character istics with a Hewlett Packard 302A Wave Analyzer Inthese applications itis useful to show the frequency spectral density ofthetransfer oscillator From this the noise contributed by the V FO may be calculated sp 019 NBeqg 2 D where Sg f is the frequency spectral density of the VF isthe harmonic number of the VFO to the input Figure 3 2 Maximum FM in APC Mode 4 18GHz RANGE fx 18GHz l 4GHz RANGE fx 4GHz iN 60 8 3 NE EE r DOTTI 05 2GHz RANGE fyx 200MHz 3 00 IK 101 MODULATING FREQUENCY Hz APPROXIMATE PULSE CARRIER FREQ ERROR vs PULSE WIDTH ERROR KHz 10 10 PULSE WIDTH ysec 3 2 Model 5257A frequency
57. 0 0325 WASHER FLAT FOR 1 4 HOW MP6 3050 0161 WASHER SPRING STL WAVY TYPE 3050 0161 WASHERISPRING STL WAVY TYPE MPS 5040 0157 COUPLER SHAFT NYLON MPS 00107 2001 HUB BUSHING MP1O 00107 2001 HUB BUSHING 11 05257 60019 GEAR BOX ASSY MP 12 0370 0472 KNOB RED BAR MP13 0370 0139 KNCB RED ROUND 1 8 SHAFT MP14 0370 0463 KNOB BLACK ROUND MP15 0370 0464 KNOB BLACK ROUND 1 0270 0479 KNOB BLACK PCINTER MP17 5020 3267 CONTACT SLIDING MP18 05260 2016 SEAL OUT SI DE MP19 05260 4002 CLAMP Di ODE MP 20 05257 00004 RETAINER D1AL MP21 05257 Soe PANEL FRONT STANDARD est co MAY lt c co Ps MP22 05251 20024 HOLDER STRIP LINE MP23 1251 1511 CONNECTOR DIODE FEMALE CLIP MP24 1251 1913 JACKSCREWS R E P CONNECTOR e MP25 _ 05251 20054 GEAR POT DRIVE P ax 2287 9 PANEL Prod PSI IAT 1251 1914 BODY R amp P CONNECTOR 14 CONTACTS 1251 0095 CONNECTOR SAF 50 PIN R1 2190 2015 R VAR WR 5K OHM 3 LIN LW R2 2100 2075 R VAR WW 5K OHM 3 LIN 1W 51 3100 2406 SWITCH ROTARY 2 3100 2469 SWITCH ROTARY 1251 0382 CONNECTOR 12 PIN PC XAS 1251 0160 CONNECTOR 15 PIN XA6 1251 0160 CONNECTOR 15 PEN 1251 0159 CONNECTOR 30 CONTACT 9 1251 0169 CONNECTOR 15 10 1251 0159 CONNECTOR 30 CONTACT See introduction to this section for ordering information 6 14 Y 9 Section VI Parts Table 6 2 Replaceable Parts M Part No
58. 0 dBm 2 V peak to peak to 5257A to INPUT connector Omit this step if input frequency is known to be withinthe sampling frequency f1 step Turnpower onbyturning SAMPLE RATE con trol cw out of POWER OFF Set switch on Counter to PLUG IN Set switch on Counter to FREQUENCY Set switch on Counter to 0 1 ms Note Other gate times may be used Turn 5257A LEVEL control fully cw then back off one turn Connect signal to be counted to 5257A INPUT Set MODE switch to PULSED RF Set RANGE switch to correct range for input frequency fx Set N switches to 001 Tune FREQUENCY dial for maximum meter reading Turn LEVEL control cw for a meter reading of 9 10 full scale Set MODE switch to APC Note that meter will read near mid scale between phase lock points and Counter will display all zeros Tune FREQUENCY dial for phase lock Meter now reads about mid scale phase error and Counter displays the sampling frequency Tune FREQUENCY dial for zero phase error exactly mid scale on meter Read sampling frequency fy on Counter and record 15 above When fx falls outside the limits of step 15 above find adjacent phase lock point to calculate N Tune FREQUENCY dial higher or lower to adjacent phase lock point and adjust for zero phase error Read Counter and record this second frequency fa Calculate N Paragraphs under 3 26 With slide rule accuracy a Input frequency fy known within sampling frequency
59. 0757 0944 0757 0945 0757 0946 0757 0948 0757 0950 R FXD FLM 12K OHM 2 1 4W 0757 0951 R FXD MET FLM 13K OHM 2 1799 0757 0952 R FXD FLM 15K OHM 2 1 4w 0757 0953 MET FLM 16K OHM 2 1 4W 0757 0954 RIFXD FLM 18K OHM 1 49 0757 0955 R FXD FLM 20K OHM 1 4 0757 0957 R FXD MET FLM 24K OHM 2 1 4W 0757 0958 R FXD MET FLM 27K OHM 2 1 4W 0757 0960 R FXD MET FLM 33K OHM 2 1 4W 0757 0963 R FXD MET FLM 43K DHM 2 1749 0757 0965 R FXD MET FLM 51K OHM 2 1 4w 0757 0972 R FXD FLM LOOK OHM 2 1 44 0757 0975 R FXD MET OX 130K OHM 2 1 4W 0760 0022 MET FLM 330 OHM 2 1 0161 0042 i R FXD MET OX 68 UHM 53 0890 0048 SLEEVE TEFLON 1 3 LONG 1120 1495 0 1 1250 0102 CONNEC TOR BNC 1251 0095 CONNECTOR RF 50 PIN 1251 0159 CONNECTOR 30 CONTACT 1251 0160 CONNECTOR 15 PIN 1251 0382 CONNECTOR 12 PIN PC 1251 1115 KEY POLARIZING FOR CKT BD SOCKETS 1251 1511 CONNECTOR DIODE FEMALE CLIP 1251 1913 JACKSCREWS R CONNECTOR 1251 1914 BODY R amp P CONNECTOR 14 CONTACTS 1251 1915 800Y R amp CONNECTOR 14 CONTACTS 1500 0014 COUPLING BELLOMS 1820 0094 INTEGRATED CIRCUIT 1820 0399 INTEGRATED CIRCUIT 1853 0 09 TRANSISTOR SILICON PNP 1853 0010 TRANSISTOR SILICON PNP 1853 0015 TRANSISTOR SILICON 2N3640 1853 0020 TRANSISTOR SILICON PNP 1853 0036 TRANSISTOR SILICON 1853 0C54 TRANSISTOR SILIC
60. 12 2100 1760 2100 2075 OBD 3050 0161 3100 2406 3100 2409 3100 2420 5020 3297 5040 0157 8180 0224 10886 1A 3303M 1025 04 9140 0096 9140 0138 1025 20 56 590 654 A 00107 2001 05257 00004 05257 20001 05257 20002 05257 20003 05257 20004 05257 20005 05257 20006 05257 20007 05257 20008 05251 20211 05251 20011 05257 20012 05257 20013 05257 20023 05251 20024 05251 20054 05257 60001 05257 60602 05257 60003 05251 60004 05257 60C05 05257 60006 05251 60607 05251 60008 05257 60211 05251 60011 05257 60012 See list ol abbreviations in introduction to this section in r AN o 05251 60013 05257 60014 05257 60015 05257 60017 05257 60018 05257 60019 05251 60021 05257 60022 05260 2016 C5260 4002 05379 60014 Table 6 2 Replaceable Parts Cont d Description BOARD ASSY PRESCALER TRANSFORMER ASSY PULSE DRIVE TRANSFORMER ASSY PULSE DRIVE TRANSFORMER ASSY VFO VFO LINEARIZER ASSY GEAR 80 ASSY SWITCH ASSY VFO LINEARIZER COIL ASSY VFO SEAL OUTSIDE CLAMP DIODE DIODE TUNNEL 05257 60013 05257 60014 05257 60C15 05257 60017 05257 60018 95251 60 19 05251 60021 05251 60022 05260 2016 05280 4002 05319 60014 See list of abbreviations in introduction 1o this section Section VI Parts Mfr M r Part No
61. 1901 0040 DIODE SILICON 30MA 1901 0040 OIODE SILICON 30MA 30WV 9140 0138 COIL CHOKE 180 UH 5 1853 0036 TRANSISTORISILICON PNP 213906 1854 0071 TRANSISTORISILICON NPN 1853 0020 TRANSISTOR SILICON PNP 1853 0036 TRANSISTOR SILICDM PNP 2N3906 1854 0221 TRANSISTOR OUALISILICON NPN 1853 0036 TRANSISTOR SILICON PNP 2N3906 1853 0020 TRANSISTOR SILICON PNP 1853 0020 FRANSESTOR SILICON PNP 1853 0036 TRANSISTOR1SILICON PNP 235906 1853 0020 TRANSISTOR SILICON PNP 1853 0020 TRANSISTOR SILICON PNP 1853 0036 TRANSISTORISILICON PNP 243906 0757 0957 RiFXD MET FLM 24K OHM 2 1 4w 1 9 0751 0954 A3FXD FLM 18K OHM 2 1 4 0757 0939 R FXD FLM 4 3K OHM 2 1 44 0757 0950 R1FXD MET FLM 12K OHN 2 1 4w 0757 0950 R FXD MET FLM 12K OHM 2 1 0757 0948 R FXD MET FLM 10K OHM 2X 1 4W 0757 0951 RiFXD MET FLM 13K OHM 2 1 44 0757 0893 RIFXD FLA 51 OHM 2X 1 4W 0757 0955 FLH 20K OHM 2 1 4W 0757 0948 R1FXD MET FLM LOK OHM 2 1 44 0757 0952 R3FXD 15K OHM 2 1 tw 0757 0941 RiFXD MET FLM 5 1K OHM 2 1 44 0157 0957 RiFXD MET FLM 24K OHM 2X 1 4W 0757 0948 RIFXD MET FLM 10K OHM 2 1 4w 0757 0939 RiFXD MET FLM 4 3K OHM 2 1 44 Sea introduction to this section for ordering information e 1 I Section VI Parts 0 Table 6 1 Reference Designation Index Cont d 0757 0950 R FXD MET FLM 12K OHM 2 1 4v 0751 0944 R FXD FLM 6 6K GHM 2 1 48 0757 0945 Ri
62. 22 Oosman Chambers Victoria Road Karachi 3 Tel 511027 512927 Cable COOPERATOR Kara PHILIPPINES Electromex inc Makati Commercial Cer e 2129 Pasang Tamo Makati Rizzi D 708 P O Box 1028 Manila Tel 89 85 01 Cable ELEMEX Manila SINGAPORE Mechanical and Combus cn Engineering Company 72 9 Jalan Kilang Red Hill Industrial Esta Cable MECOMB Singapore SOUTH AFRICA Hewlett Packard South rica Pty Ltd P O 31716 Sreamtontein Transvas Milnerton 30 De Beer Street Johannesburg Tel 725 2060 725 203 lt Telex 0226 JH Cable HEWPACK Joharnesture Hewlett Packard South 25253 Pty Ltd Breecastie House Bree Street Tewa Tel 3 6019 3 6545 Cable HEWPACK Cape i Teter 5 0006 Mewiett Packard South tei 3 Pty Ltd 308 Glenwood Centre Corner Munt amp Moore bei PO Box 99 Overport Natai Tet 347536 Brussels 1150 Belgium Tek 34 33 32 34 26 19 Cable BELRAMEL Brussels Velez 21790 Tet 022 41 54 00 Cable REWPACKSA Geneva Telex 2 24 86 TAIWAN REP OF CHINA Hewlett Packard Taiwan 39 Chung Shiso West Sec 1 Overseas insurance Corp Sidg 7th Fioor Taipei Tel 579 605 579410 579 612 Telex c o Bankamerica TP 339 Cable HEWPACK Taipe THAILAND The International Engineering Co ttd P 0 Box 39 614 Sukhumvit Road 10722 lines Cable GYSOM TLX INTENCO 8 226
63. 43 series 5245 series came in low and high speed versions The 6016 is the normal low speed 600kHz version used in most of the count positions and provides 1224 BCD output to the rear panel connector The 6003 version is the option 03 variation of it that provided 1248 BCD output with the 1 state negative as opposed to the 6002 which was the same but with l state positive This module was used in several pieces of HP test equipment including the 5245L frequency counters WIDBM COUNTER While not strictly Nixie technology I have a four digit vacuum flourescent counter You can see more photos by clicking here rne d J x 4 di j FLAG 44 4 Ak 4 ella E E uc ou a a http www decodesystems com nixie html 4 of 7 9 03 2007 11 28 29 Nixie Displays MYSTERY TUBE I have a dozen or so of these display tubes They have five wire leads The tube is marked SP8B H G B and were made in Japan Does anyone recognize these tubes and better have a datasheet for them I received the following information via e mail Those are single digit vacuum fluorescent displays ISE is a subsidiary of Noritake Itron http www noritake elec com itron Two wires are the filament connections takes 1 5V AC or DC one is the control grid and the remaining two are the symbol anodes negative sign amp overflow indicator which should be b
64. 5 0698 5997 0698 5993 0757 0898 0757 0915 0757 0917 0757 0337 0757 0917 0760 0022 0760 0022 0757 0346 05257 60015 05257 60014 95257 60211 95257 20211 1901 0567 0698 5666 1901 0573 1901 0617 1901 0617 05257 60038 05257 20038 0160 3060 0160 3060 0180 0100 0160 3060 0160 0194 0160 0194 0180 0218 Description TRANSISTOR SILICON NPN 2N3933 TRANSISTOR SILICON NPN 2N3959 TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN R FXD MET FLM 51 OHM 2 1 48 R FXD COMP LIK OHM SX 1 8w R FXD COMP 1800 OHM 5 1 8W R FXO COMP 11K OHM 53 1 88 R FXD COMP 1800 OHM 5X 1 8 R FXD COMP 3300 GHM 10 1 8W R FXD NET FLM 15K OHM 2 l 4W R FXD MET FLM 7500 OHM 2X 1 48 R FXD MET FLM 82 OHM 2 1 58 R FXD COMP 1200 OHM 5 1 8M R FXD MET FLM 1200 OHM 2 1 44 R FXD MET FLM 390 OHM 2 1 4W R FXD COMP 1200 OHM ST 1 8W R FXO MET FLM 430 OHM 2 1 4W R FXD COMP 12K OHM 5X 1 8W R FXD COMP 8200 OHM 5 1 8W R FXD FLM 82 OHM 2 1 4w FACTORY SELECTED PART RIFXO MET FLM 430 OHM 2 1 4h R FXD MET FLM 510 OHM 23 1 4w R FXD FLM 432 OHM 1 1 4 R FXD FLM 510 OHM 2 1 47 R FXD MET FLM 330 OHM 2 IW R FXD MET FLM 330 OHM 2 lW R FXD Met Flm 100 1 1 8W Factory Selected Component TRANSFORMER ASSY PULSE DRIVE TRANSFORMER ASSY PULSE DRIVE BOARD ASSY PULSE GENERATOR 30ARD BLANK PC DI ODE STLICON R FXD ALUMINA CER 20 OHM 5 1 10W SAMPLER ASSY SAMPLER 0100 55 MATCHED PAIR SAMPLER DIODE ASSY MAT
65. 5257A controls set as above adjust front panel BAL control for center reading on meter Turn Counter off and remove extender cable Plug 5257 into Counter and turn Counter on Set FREQUENCY MHz dial to 100 and allow 10 min warmup 50 MHz CHECK Connect Signal Generator and RF Millivoltmeter to 525 7A INPUT through BNC and BNC female to N adapter Connect Oscilloscope to 5257A PULSED RF OUT Set Oscilloscope to 0 1 V cm vertical and 1 ms em horizontal Set 5257A controls as follows thumbwheels 001 MODE APC RANGE 05 2 GHz Set Signal Generator output to 50 MHz 50 dBm and adjust 5257A LEVEL ADJ for 0 35 V peak to peak 1 on Oscilloscope Set 5257A MODE to PULSED RF and increase Signal Generator output to 25 dBm 5 4 PERFORMANCE CHECK TEST CARD Hewlett Packard Model 5257A Tests Performed By Transfer Oscillator 0 Serial DESCRIPTION First Check Date FREQUENCY Dial Check Counter reads 100 MHz Counter Gate Extension OK 50 MHz Check Meter reads 9 10 with 7 dBm input 200 MHz Check Meter reads 9 10 with 7 dBm input 1 GHz Check Meter reads 9 10 with 7 dBm input 4 GHz Check Meter reads 9 10 with 7 dBm input 8 GHz Check Meter reads 9 10 with 7 dBm input Pulsed Carrier Check Meter reads 5 10 with 5 us pulse 15 GHz Check Meter reads 9 10 with 4 dBm input 18 GHz Check Meter reads 9 10 with 4 dBm input E
66. 757 0893 R FXD MET FLM 51 OHM 2 1 4 0757 0923 RiFXD MET FLM 910 OHM 2X 1 44 0757 0904 R FXD MET FLM 150 OHM 2 1 4w 0757 0925 MET FLM 1 1 OHM 23 1 44 0757 0893 R FXD FLM 51 OHM 2 1 4 0757 0931 R FXO FLM 2000 OHM 2 1 4e 0757 0909 R FXD MET FLM 240 OHM 2 1 48 0757 0931 R FXO MET FLM 2000 OHM 2X 1 4W 0757 0904 R FXD MET FLM 150 OHM 2 1 44 0757 0900 R FXO MET FLM 100 OHM 2 1 40 8 0757 0942 R FXO MET FLM 5600 OHM 2 1 48 0757 0941 R FXD FLM 5100 OHM 2 1 4W amp 0757 0931 RIRXO MET FLM 2000 OHM 2X 1 48 0757 0945 R FXO MET FLM 7500 OHM 2 See introduction to this section for ordering information AUSTRIA Uallabor Gbit Wissenschaftliche instrumente Rummethardtgasse 6 P O 33 A 1095 Vienna Tel 222 42 61 81 43 13 94 Cable LABORINSTRUMENT Vienna Telex 75 742 BELGIUM Hewlett Packard S A Genelux 348 Boulevard du Souverain 1160 Urusse s Tel 72 2240 Cable PALOBEN Brussels Telex 23 494 00 3460 01 81 66 40 Cable HEWPACK AS Telex 66 40 Hewlett Packard A S Torvet 9 DK 0600 Silkehorg Tei 06 227 340 FINLAND Hewlett Packard Oy Bulevardi 26 Bex 12185 12 Tel 13 730 Cable HEWPACKOY Helsinki Telex 12 1563 FRANCE 2 Hewlett Packard France Quartier de Courtsboeut Bolte Postale No 6 91 Orsay Tel 1 920 88 01 Cable HEWPACK Orsay 60048 ANGOLA Telectra Empresa T cnia
67. 8 to 1854 0323 Change A8Q3 to 1854 0073 Delete series number 820 Page 6 11 Table 6 1 Change A8C4 to 0140 0193 C FXD MICA 82 PF 5 300VDCW Add A8C8 0150 0093C FXD CER 0 01 UF 80 20 100VDCW Change A8C3 5 and 10 to 0160 2327 FXD CER 1000 PF 20 75VDCW Page 6 12 Table 6 1 Change A8R5 to 0698 3111 COMP 30 OHM 595 1 8W Change A8Q3 to HP Part No 1854 0073 Change 891 7 and 8 to 1854 0323 Page 6 13 Table 6 1 Change A8R14 18 25 and 29 to 0157 0923 FXD MET FLM 910 OHM 2 1 4W Change 8 16 20 27 and 31 to 0757 0925 R MET FLM 1100 OHM 2 1 4W Page 6 2 Table 6 1 Add A1C21 0160 2143 FXD CER 2000 PF 80 20 1000VDCW Delete A1C25 0150 0031 C FXD TI 2 PF 5 500VDCW Page 6 8 Table 6 1 Change ATA1R3 0757 0939 R FXD MET FLM 4300 OHM 2 1749 Page 6 17 Table 6 2 Change 0150 0031 TQ to 1 Change 0160 2143 TQ to 25 Page 6 18 Table 6 2 Change 0757 0938 TQ to 6 Change 0757 0939 TQ to 8 Page 8 5 Figure 8 3 Add A1C21 connect from junction R22 R23 L5 to ground Delete A1C25 Page 8 13 Figure 8 7 Change ATAIR3 to 4300 ohms delete ATA1R21 connect R3 in parallei with C4 T 1 Section Manual Changes CHANGE 4 Page 6 3 Table 6 1 928 Change 2 from 05257 60211 to 05257 60009 Change 05257 20211 to 05257 20009 Page 4 3 Paragraph 4 22 last sen tence Change to read The reference level is adjusted with APC ADI A4R10 screw driver control
68. A 1902 3079 1902 3079 1902 3079 1902 3079 DIODE BREAKDOWN SILICON 4 53 DIODE 8REAKDOWN SILICON 4 53 DIODE BREAKOOWN SILICON 4 53V DIODE BREAKDOWN SILICON 4 53 1901 0119 8180 0224 0890 0048 9140 0158 9140 0158 9140 0158 9100 0346 9100 1124 8180 0224 0890 0048 8180 0224 0890 0048 9100 0368 8180 0224 0890 0048 8180 0224 0890 0048 1854 0073 1854 0323 1854 0019 1853 0227 DIODE SILICON WIRE 424 1 67 SLEE VE TEFLON COIL FXD RF 1 COIL FXD RF 1 COIL FXD RF 1 COIL FXD 0 05 COIL FXO 0 22 WIRE 24 1 6 SLEE VE YEFLON WIRE l824 1 6 SLEE VE TEFLON COSLIFXD 0 33 W1RE 824 1 6 SLEE VE TEFLON WIRE1 24 1 6 SL EE VE TEFLON TRANSISTORzNPN TRANSISTOR NPN TRANSISTOR SIL TRANSISTOR SIL 15WIV LONG 1 3 LONG UH 10 UH 10 UH 10 20 UH 107 LONG 1 3 LONG LONG 1 3 LONG UH 103 LONG 1 3 LONG LONG 1 3 LONG 2N2857 2N2857 NPN ICON PNP See introduction to this section for ordering information Section VII Manual Changes Table 7 1 A8 Prescaler Assembly 05257 60013 Cont d 1853 0227 TRANSISTOR SILICON PNP 1854 0019 TRANSISTORZSILICON NPN 1854 0073 TRANSISTOR NPN 242857 1854 0073 TRANSISTOR NPN 2N2857 1854 0019 TRANSISTOR SILICON NPN 1853 0015 TRANSISTOR SILICON PNP 2N3640 1853 0015 TRANSISTOR SILICON PNP 2N3640 1854 0073 TRANSISTOR SILICON NPN 1854 0073 TRANSISTOR SILICON NPN 1854 0019 TR
69. A9Q3 A9Q4 A9Q5 ASQ6 A9Q7 A9Q8 A9Q9 A9Q10 A9R1 A9R2 A9R3 ASR4 A9RS 9 6 ASR A9R8 A9RY A9R10 A9R11 05257 60002 05257 20002 0180 0116 0180 0116 0180 0230 0160 2055 0160 2055 0160 2055 0180 0116 0140 0198 0140 0198 1901 0040 1901 0040 1901 0040 1820 0399 1820 0094 1820 0094 1820 0399 9140 0138 9140 0138 1854 0215 1854 0215 1854 0215 1853 0036 1854 0053 1854 0215 1854 0215 1853 0036 1853 0036 1853 0036 0157 0200 0157 0940 0751 0280 0757 0925 0757 0821 0757 0906 0761 0042 0757 0921 0757 0960 0757 0955 0757 0948 BOARD ASSY GATE EXTENDER BOARD BLANK PC C FXD ELECT 6 8 UF 10 35 VDCW C FXD ELECT 6 8 UF 10 35 VDCW C FXD ELECT 1 0 UF 20 50 VDCW C FXD CER 0 01 UF 80 20 100 VDCW C FXD CER 0 01 UF 80 20 100 VDCW C FXD CER 0 01 UF 80 20 100 VDCW C FXD ELECT 6 8 UF 10 35 VDCW C FXD MICA 200 PF 5 300 VDCW C FXD MICA 200 PF 5 300 VDCW DIODE SILICON 30 MA 30 WV DIODE SILICON 30 MA 30 WV e DIODE SILICON 30 MA 30 WV INTEGRATED CIRCUIT INTEGRATED CIRCUIT INTEGRATED CIRCUIT INTEGRATED CIRCUIT COIL CHOKE 180 UH 5 COIL CHOKE 180 UH 5 TRANSISTOR SILICON 2N3904 TRANSISTOR SILICON NPN 253904 TRANSISTOR SILICON PNP 2N3906 TRANSISTOR SILICON NPN 2N2218 TRANSISTOR SILICON NPN 2N3904 TRANSISTOR SILICON NPN 2N3904 TRANSISTOR SILICON PNP 2N3906 TRANSISTOR SILICON PNP 2N3906 TRANSISTOR SILICON PNP 2N3906 TRANSISTOR SILICON NPN 2N3904 R FXD
70. ANSISTORISILICON NPN 1854 0019 TRANSISTOR SILICON NPN 1853 0009 TRANSISTOR SILICON PNP 1853 0009 TRANSISTOR SILICON PNP 1854 0215 TRANSISTOR SILICON NPN 2N3904 1854 0005 TRANSISTOR SILICON NPN 2NTOB 1854 0003 TRANSISTOR NPN SILICON 1854 0005 TRANSISTOR SILICON NPN 2 708 0698 3378 R FXD CARBON 51 OHM 5 L BM 0757 0939 R FXD MET ELM 4300 OHM 2 174W FACTORY SELECTED PART 0598 3381 R FXD COMP 150 OHM 5 1 8W 0698 5173 R FXD COMP 36 OHM 57 1 88 0674 2405 R FXD COMP 24 OHM SE 1 8W 0757 0931 R FXD MET FLM 2000 OHM 2 1 48 0698 5178 R FXD COMP 1500 OHM 5 1 8W 0757 0925 R FXD FLM 1100 OHM 2 1 49 0757 0934 R FXD MET FLM 2 7K OHM 2 1 4 0757 0900 R FXD MET FLM 100 OHM 2X 1 48 o 0698 3378 R FXD CARBON 51 OHM ST 1 8W 0751 0922 R FXD MET FLM 820 OHM 2 1 58 0698 3113 R FXD CARBON 100 OHM 5X 1 8M 0757 0922 R FXD MET FLM 820 OHM 2t 1 58 0698 3376 R FXD COMP 43 OHM 5 1 8W i 0757 0923 R FXD MET FLM 910 OHM 2X 1 44 i 0698 3378 R FXD CARBON 51 OHM 5 1 8W 0757 0922 R FXD MET FLM 820 OHM 2 1 4w 0698 3376 R FXD COMP 43 OHM 5 1 8W 0757 0923 R FXD MET FLM 910 OHM 2X 1 48 9 0698 3381 COMP 150 OHM 5 1 8W 0757 0925 R FXD MET FLM 1 1 OHM 2 1 4W 0698 3380 R FXD CARBON 75 OHM 5 1 8 i 0757 0924 R FXD MET FLM 1 0K OHM 2 1 48 0757 0922 R FXD MET FLM 820 OHM 2 1 4w 0757 0893 R FXD MET FLM 51 OHM 2 1 44 0757 0923 R FXD MET FLM 910 OHM 2X 1 4W 0698 3378 R FXO CARBON 51 OHM 5 1 8W 0757 0922 FLM 820 OHM 2 1 4W 0
71. Allies Freducts Corp Dania Fla Continental Connector Corp Woodside fi Leaciatt Cc Inc Long Islanc H Y National Con Co Sheridan Wyc Vitramon Inc Gordos Corp Methode Mig Co Bridgeport Conn Bloombietd Rolling Meadows Hi Arnold Engineering Co Marengo 11 Dage Electric inc Franklin 102 Siemon Mig Co Wayne lil Weckesser Co Chicago HI Huggins Laboralores Sunnyvale Calif Hi Q Div of Aerovox Corp Olean Tnardatson Meissner Inc Mt Carmel Ili Sola Manufacturing Co Los Angeles Calif Carlton Screw Co Chicago 111 Mictawawe Associates inc Burlington Mass Eacel Transformer Co Oakland Calf Code No 97464 97539 97974 97981 98141 98159 88270 98278 98291 98376 98731 98734 98821 38378 89109 39312 99378 99515 99707 99200 99848 44414 39942 9391 Manufacturer Address Industrrat Retarning Ring tevingtan Automatic amp Precssion Mig Englewood Reon Resistor Corp Yonkers N Y Litton System Inc Adtes Westrex Commun Div New Rochelle R Troncis Inc NY Jamaica N Y Rubber Teck inc Gardena Calit Hewleti Packard Moseley Div Pasadena Calil Micr dot Inc So Pasadena Cali Seateciro Corp Mamaroneck N Y Zero Mfg Co Burbank Calif General Mills Inc Electronics Div Minneapolis Minn Paeco Div ol Hewlett Packard Palo Alto Calif North Hills Electronics Inc Glen Cove N Y Internati
72. CHED PAIR BOARD ASSY APC 81 80ARD BLANK PC C FXD CER 0 1 UF 20 25VDCM C FXD CER 0 1 UF 20 25 C FXD ELECT TA 4 7UF 10 35YDCW C FXD CER 0 1 UF 20 25YDCW C FXD MY 0 015UF 10 C FXO NY 0 015UF 10 CiFXD ELECT 15 UF 10 35VDCH See introduction to this section for ordering information Section VI Parts t Section VI Parts Table 6 1 Reference Designation Index Cont d A CB 0160 0194 C FXD MY 0 015UF 10 401 1854 0071 TRANSISTOR SILICON NPN A4Q2 1855 0038 TRANSISTOR DUAL 2N3922 A4Q3 1853 0036 TRANSISTOR SILICON PNP 2N29D6 A Q 1854 0071 TRANSISTOR SILICON NPN 405 1854 0215 TRANSISTOR SILICON NPN 2N3904 406 1854 0221 TRANSISTOR DUAL SILICON NPN A407 1854 0215 TRANSISTOR SILICON NPN 2N3904 A Q8 1854 0215 TRANSISTOR SILICON NPN 2N3904 409 1854 0215 TRANSISTOR SILICON NPN 283904 A4Q10 1854 0071 TRANSISTOR SILICON NPN 4011 1854 0221 TRANSISTOR DUAL SILICON NPN e A4Q12 1854 0071 TRANSISTORISILICON NPN ASRI 0751 0953 R FXD MET FLM 16K OHM 2 1 48 AGR 0757 0953 RiFXD MET FLM 16K OHM 2X 1 4 AGR3 0757 0948 R FXD FLM 10K OHM 2X 1 48 0757 0938 R FXD MET FLM 3 9K OHM 2 1 4W AGRS 0757 0953 R FXD MET FLM 16K OHM 2 1 4 ASRE 0757 0927 R FXD MET FLM 1 3K OHM 2 1 4w AGRT 0757 0952 R FXD FLM 15K OHM 2 1 59 AGRO 0757 0940 R FXD MET FLM 4 7K OHM 2 1 48 AGRO 0757 0975 R FXD MET OX 130K OHM 2 1 49 AGRIO 2100 1760 R VAR WW SK OHM 10 LIN 172 ASRI1 0757 0972 R FXD MET
73. CW 0160 2143 C FXD CER 2000 PF 80 20 1000V0CW 0160 2143 C FXD CER 2000 PF 80 20 1000VDCW 0160 2143 C FXD CER 2000 PF 80 20 1000YDCH 0160 2143 C FXD CER 2000 80 201 1000VDCH 0160 2143 C FXD CER 2000 PF 80 20 1000VDCw 0150 2143 C FXD CER 2000 PF 80 20 1000VDCW NOT ASSIGNED 2160 2153 CIFXD CER 2000 PF 80 20 000V5C4 11023 2160 2152 C FXD CER 2000 PF 80 20 1000vDCV 51025 0160 2153 C FyC CER 2106 PF 80 20 1000 05 51625 2150 0031 C FX2 2 PF 5 500 SELCT Ry SELECCEI ALCRI 1901 2179 DIODE SILICON 15591 AYCR2 1901 0175 DICDE SILICON 15y V 1 93 1901 0179 DIODE SILICON 15wIv AlCRA 1901 0175 DICDE SILICON 5SHIV ALCRS 1901 0179 DICDE SILICON 15WIV ALEI 9170 0025 CORE FERRITE BEAD ALE2 9170 0029 CORE FERRITE BEAD Alli 9140 0158 COIL FXD RF 1 UH 1031 8112 9140 0138 COIL CHOKE 180 UH SE 113 9140 0138 COIL CHOKE 180 UH 5 11 4 9140 0138 COIL CHOKE 180 UH 5 AILS 9140 0138 LOTL CHOKE 180 UH 5 ALLE 9140 0158 CDIL FXD RF 1 UH 108 101 1854 0238 TRANSISTOR SILICON NPN 2N3933 102 1854 0238 TRANSISTOR SILICON NPN 283933 See introduction to this section for ordering information Ar U Table 8 1 Reference Designation Index Cont d Relerence Designation d Part No 1854 0073 1854 0220 1854 0273 1854 0273 0757 0893 0698 6381 0598 5179 0698 6381 0698 5179 0675 3321 0757 0952 0757 0945 0757 0858 0698 6242 0157 0926 0757 0914 0698 6242 0757 091
74. Co Transisio Electronics Corb Westngnouse Etectuc Coro ctrome Tune Div Elmia h Y Cor Hew Yor li Graphis Cc City of Industry Cz if Avae Coir Culver City Fartenitc Careia amp Inst Coro Se iconduclz Div Mountain View Mianesat Minneapetis Manr Bittzner Cut The Monterey Park Cat Frog ine MI View Operations Mountain View Cal Cianford hj Hawthorne Calif 1 Wire Products Inc ental Device Coro Rayineon Cc Semiconductor Div Mountain View Hesiett Pacaard Co Boonton Radio Div Rockaway N Los Angeles Calif Pomona U S Engmeeing Co Delperi Cc Buigess Battery Co Niagara Falis Dntatio Canada Deviscn Fastener Corp Los Angeles Call Bitstoi Co The Waterbury Conn Sloan Company Sun Valley Calif ITT Cannon Electric inc Phoenix Div Phoenix Arizona CBS Etectionics Semiconductor Orerations Dis of 5 Inc Lowell Mass indtanapolis Ind Costa Mesa Cali Houston Texas Buibank Cali Chicago ill Mei Rain Babcock Relays Div Texas Capacitor Co Tecn ind Inc Alonm Elect Electro Assemblies inc Matloty Battery Co of Canada 10 Toronto Ontario Canada Geneva Traasisior Western Corp Los Angetes Catt Berkeley Cali Niagara Falls N Y Berne inc Te Tet me tandum CTS ct Beine Inc Chicago Telephone of Calrloimia inc So Pasadena Caiit Code No 11242 11312
75. Divide fx by f to obtain N N fy fy Input frequency fy not Known within sampling frequency Find difference between fy and fg Divide f1 by the difference to obtain N N f1 fg j or N f f1 fg Set N switches to calculated N number and read input frequency on Counter Verify N Set N switches upone unit e g 080 to 081 or down one unit e g 080 to 079 Tune FREQUENCY dial to adjacent phase lock point corresponding tothe direction N switches were turned in step 19 lower for N 1 and higher for N 1 Counter should display the same frequency as step 18 above Maximum N setting is typically 144 from 15 to 18GHz and 225 from 05 15 GHz Paragraph 3 25 Section II Operation Figure 3 11 5257A Input Connector and Attenuator BRASS BODY CONNECTOR 1250 0914 1250 0816 8 ATTENUATOR ASSEMBLY 6 db 05255 6031 CONTACT RF CONN 1250 0915 1250 0909 9 CONTACT SLIDING REAR 05255 2020 INSULATOR 1250 0815 10 SPRING COMPRESSION 1460 0268 CENTER CONDUCTOR 05257 20030 SLEEVE 05257 20055 SPRING COMPRESSION 1460 0298 12 BEAD 08740 2100 6 CONTACT SLIDING 5020 3297 13 CENTER CONDUCTOR REAR 05257 20061 HOLDER PAD 05257 20029 3 8 Section IV Theory SECTION iV THEORY OF OPERATION 4 1 GENERAL 4 2 The Model 5257 1 a p
76. FILTER QIO OUTPUT 1854 0071 TO A6 1 Q4 1854 0071 OV REG MODE A MINA SWITCH SICF 7 OV REG e OSCILLATOR N S33UBy enuryy uorj2ag K4XL s This manual is provided FREE OF CHARGE from the BoatAnchor Manual Archive as a service to the Boatanchor community It was uploaded by someone who wanted to help you repair and maintain your equipment If you paid anyone other than BAMA for this manual you paid someone who is making a profit from the free labor of others without asking their permission You may pass on copies of this manual to anyone who needs it But do it without charge Thousands of files are available without charge from BAMA Visit us at http bama sbc edu
77. FLM 100K OHM 2X 1 4M R12 0698 6681 R FXD COMP 9 1 OHM 57 1 8 4813 0757 0927 R FXD MET FLM 1 3K OHM 2 1 4W A4R14 0757 0938 R FXD MET 3 9K OHM 22 1 4W 15 0757 0963 R FXD MET FLM 16K OHM 2 1 48 A amp R16 0751 0948 R FXD MET FLM 10K OHM 2X 1 49 AGRI 0751 0942 R FXD MET FLM 5 6K OHM 2 1 4N 18 0698 3113 R FXD CARBON 100 OHM 5 1 8H A4R19 0757 0941 R FXD MET FLM 5 1K OHM 2 1 uy A4R20 0757 0941 RiFXD MET FLM 5 1K OHM 2X 1 4W A4R21 0751 0942 R FXD MET FLM 5 6K OHM 2X 1 4W ASR22 0757 0941 R FXD MET FLM 5 1K OHM 24 1 48 A4R23 0751 0924 R FXD MET FLM L 0K OHM 2 1 4W A4R24 0757 0952 R FXD MET FLM 15K OHM 2 1 4w 4525 0757 0941 R FXD MET FLM 5 1K OHM 2 1 49 ASR26 0757 0948 R FXD MET FLM 10K OHM 22 1 4W A4R27 0757 0963 R FXD MET FLM 43K OHM 2X 1 4W AGR28 0757 0924 R FXD FLM 1 0K OHM 2 1 4 A4R29 0751 0924 R FXD MET FLM 1 0K OHM 2X 1 4 A4R30 0157 0952 R FXD MET FLM 15K OHM 2 1 4W A4R31 0757 0940 R FXD MET FLM 4 7K OHM 2X 1 4W A4R32 0757 0955 R FXD FLM 20K OHM 2 1 4M See introduction to this section for ordering information 6 4 Section VI Parts Table 8 1 Reference Designation Index Cont d Description Note Reference Designation 0757 0924 RIFXO MET FLM 2 0K OHM 2X 1799 0757 0935 R FXD FLM 3 0K OHM 27 1 48 0757 0921 R FXD MET FLM 750 OHM 25 1 0757 0921 R FXD MET FLM 750 OHM 2X l W 0757 0953 R FXD MET FLM 16K OHM 2 1748
78. FXD MET FLM 7 5K OHM 2 1 6W 0757 0955 R FXD FLM 20K OHM 2 1 49 0757 0931 R iFXD MET FLM 2000 OHM 2 1 4 0757 0972 R FXD MET 100K OHM 2 1 4 0757 0939 R FXD MET FLM 4 3K OHM 2 1 48 0757 0950 R FXD FLM 12K OHM 2 1 4 0683 1055 R FXO COMP 1 MEGOHM 5 1 6 0751 0955 R FXD MET FLM 20K OHM 2 1 48 0757 0914 R FXD MET FLM 390 OHM 2X 1 4w 0757 0935 R FXD FLM 3 0K OHM 2 1 4W 0757 0945 R FXD MET FLM 7 5K DHM 2X 1 44 0757 0939 R FXD MET FLM 4 3K OHM 22 1748 8 0757 0950 R FXD MET FLM 12K DHM 2 1 4 0757 0936 R FXD MET FLM 3 3 OHM 2 1 4W 0757 0955 R3FXO FLM 20K OHM 2 1 4W 0757 0899 R3FXD MET FKM 91 OHM 2 1 4N 0757 0924 R FXD FLM 1 0K OHM 2X 1 4W 0757 0957 R FXD FLM 24K OHM 211758 05257 60044 VFO LINEARIZER ASSY INCL 1 2 05257 60004 BDARD ASSY VFO LINEARIZER 05257 20004 BOARD BLANK PC 05257 6C021 SWITCH ASSY YFO LINEAREZER ATAICI 0180 0291 CiFXD ELECT 1UF 10 35YDCM 1 2 0180 0291 CiFXD ELECT 103 35VDCN ATA1C3 0180 0291 C FXD ELECT 1UF 10 35VDCW ATAIC4 0180 0160 C FXD ELECT 22UF 35VDCW A7A1C5 0180 0291 C FXD ELECT 1UF 10 35YDCW A7TALCRI 1901 0040 DIODE SILICON 30MA 30WV 1 9140 0138 COIL CHOKE 180 UH 5 101 1854 0215 TRANSISTOR SILICON NPN 2N3904 ATA102 1854 0221 TRANSISTOR DUAL SILICON 103 1854 0215 TRANSISTOR3SILICON NPN 2N3904 104 1854 0215 TRANSISTORISILICON NPN 2N3904 ATAIRI 0751 0934 R FXD MET FLM 2 7K OHM 2 1 4W A
79. H 18 0160 2321 C FXD CER 1000 PF 20 T5VDCN 9 0160 2327 C FXD CER 1000 PF 20 T7T5VDCW 20 0160 2327 C FXD CER 1000 PF 20 75VDCW 21 0160 2321 C FXD CER 1000 PF 20 T5VDCW 11 05257 60022 COIL ASSY VFO ATA301 1854 0345 TRANSISTOR SILICON 2N5179 ATA302 1854 0345 TRANSISTOR SILICON NPN 2N5179 1854 0238 TRANSISTOR SILICON NPN 283933 ATA304 1854 0238 TRANSISTOR SILICON NPN 2N3933 ATA3Q5 1854 0238 TRANSISTOR SILICON NPN 2N3933 A7A306 1854 0238 TRANSISTOR SILICON NPN 2N3933 1854 0238 TRANSISTOR SILICON NPN 2N3933 ATA3RI 0757 0379 MET FEM 12 1 OHM 1 1 88 ATA3R2 0757 0948 RiFXD MET FLM LOK OHM 2X 1 4H ATARI 0757 0941 R FXD MET FLM 5 1K OHM 26 174 ATA3R4 0757 0942 R FXD MET PLM 5 6K OHM 2 1 4W ATA3R5 0757 0931 R FXD MET FLM 2000 OHM 2 1 44 ATA3R6 0757 0946 R FXD MET FLM 8 2K OHM 25 1759 ATA3RT 0757 0924 R FXD MET FLM 1 0K OHM 2 l bw 0757 0926 R3FXD MET FLM 1 2K OHM 2X 1 4w ATA3RS 0757 0926 RIFXO FLM 1 2K OHM 22 1 44 ATA3R10 0757 0930 R FXD MET FLM 1800 OHM 2X 1748 11 0157 0955 R FXD MET FLM 20K OHM 2 1749 ATA3R12 0757 0955 R FXD MET FLM 20K OHM 2X 1 4W ATA3R13 0698 5994 R FXD COMP 6 8K CHM 53 1 8N ATA3R14 0698 5994 R FXD COMP 6 8K CHM 5X 1 8W ATA3R15 0757 0905 R FXD MET FLM 160 OHM 2 1 4w ATA3R16 0757 0922 R FXD FLM 820 OHM 2 1 4w 17 0757 0905 R FXD MET FLM 160 OHM 2 1 4w ATA3R18 0698 5177
80. I Regwood City Calf E Monte Cate Westchester Automatic Electro Sequora Wire Cc Precision Coil Serra 22 Molor Cerpen Component Ser Cc Sudgewaler Mass res dre Los Angeles Calif Twentieth Century Westinghouse Etectic C77 Semi Concuctor Dez Uttronik Inc Youngwood Pa San Mateo 00015 44 Revised September 1567 6 20 09 09026 09134 09145 09250 09566 1021 1041 16645 11236 1123 Manufaciurer Address Union Catbide Corp Linde Div Kemet Dept Cleveland Ohio Hiumitrome Engineering Sunnyvale Catil Cosmo Plastic o Electrical Spec Co Barber Colman Co Tilfen Optical Co Rosiyn Heights Long island N Y Westbury N Y Cleveland Ohio Rockloid IH Corp Stewart Engineering Co Santa Cruz Calit Wakefield Engineering tac Wakefield Mass Bassitk Co Div ol Stewart Warnes Coip Bridgeport Conn Redwood Cily Bausch and Lomb Optical Co Rochester E Products Co of Ametica Chicago IN Amator Electronic Hardware Co inc New Rochelle N Y Beece Electrical Insirument Co Inc Penacook Indianapolis Inc Phoenix Ariz Raychem Corp Genera Devices Co Inc Sencar Div Components Inc Tornagion Mig Co West Div Van huys San Cares Van Ruys Calif Pasadena Cali Minneapolis Mian Varian Assoc imac Div Kelvin Etecliic Co Digitran
81. L fully CW N 001 and sampling 8 8 8 5 Section VIII Circuit Diagrams 6 gives frequency compensation for the phase lock loop Each range has a different time constant inserted into the loop to give the following 3 dB points RANGE 3 05 to 2 GHz 70 kHz 2 to 1 GHz 16 kHz 1 to 4 GHz 3 kHz 4 to 18 GHz 800 Hz Note This is not the loop bandwidth p p Q 1 kHz 05 2 GHz range Waveforms taken with an HP 180A 1801A Vertical Amplifier and a 10004A 10 to 1 Divider Probe 8 10 gt P 3Vp p 1 kHz 6 AS VIEWED FROM 1 kHz sampling only COMPONENT SIDE A6 also contains parts ot the system lock indica tor In the APC mode with a phase lock condition a 1 kHz signalappears at Q2 input The level must be greater than 20 mV and will cause 15 V at pin 6 to enable the Counter The waveform at point 6 was taken with the unit sampling The levelat this point is small so check the dc output voltage for proper indication 2I0V L RANGE SWITCH TO A7 A 15VDC COUNTER ENABLE 7YDC COUNTER DISABLE 4 V p p 1 kHz 1 18 GHz range The 5257 in mode with no fx input VFO at 70 MHz 05 to 2 GHz range LEVEL fully CW N 001 and sampling Waveform 8A taken with RANGE set to 4 18 GHz Section VIII Circuit Diagrams AT includes three circuit boards 1 linearizer 1 2 VFO control A7A2 and 3 VFO The frequency
82. M 51 1 8M 28480 0698 3375 1 0698 3376 R FXD COMP 43 OHM 5 1 8W 28480 0698 3376 2 0698 3378 R FXD CARBON 51 OHM 5 1 88 28480 0698 3378 4 I 0698 3379 R FXD COMP 68 OHM SE 1 8W 128480 0698 3379 1 0698 3380 i R FXD CARBON 75 OHM 5 1 8W 728880 0698 3380 Ii 0698 3381 R FXD COMP 150 OHM 51 1 8 128480 0698 3381 2 x 0598 5075 R FXD COMP 130 OHM 57 1 24 28480 0698 5075 l EE See list of abbreviations in introduction to this section 3 15 Section VI Parts Table 6 2 Replaceable Parts Cont d Stock No Description Mir Part 0698 5173 R FXD COMP 36 OHM 5 L 8wW 28480 0698 5173 1 0698 5174 R FXD COMP 200 OHM 5X 1 8W 28480 0698 5174 1 0698 5177 R FXD COMP 820 OHM 5 1 8W 28480 0698 5177 1 0698 5178 R FXD COMP 1 5K OHM 5 1 8 28480 0698 5178 1 0698 5179 R FXD COMP 1800 OHM 5 1 8M 28480 0698 5179 2 0698 5562 R FXD CARBON 120 OHM 6 1 8W 28450 0698 5562 1 0698 5565 R FXD CARBON 2 2 OHM 5 1 8W 28480 0698 5565 2 0898 5666 R FXD ALUMINA CER 20 OHM 5 1 10W 28480 0698 5666 1 0658 5993 R FXD COMP 8 2K OHM 5 1 8 28480 0698 5993 1 698 5994 R FXD COMP 6 8K OHM 5X 1 8 28480 0698 5994 2 0658 5997 R FXD COMP 12 OHM 5 L 8W 28480 0698 5997 1 0648 6242 R FXD COMP 1 2K OHM 5 1 8W 28480 0698 6242 2 0688 6381 R FXD COMP 11K OHM 5 1 8M 28480 0698 6381 2 0698 6648 R FXD COMP 620 5 1 8W 28480
83. Mio MODEL 525A EU TRANSFER OSCILLATOR Manual S rial Prefix 1104A T Manual Printed APRIL 1971 MARE ALL CORRECTIONS THIS MANUAL ACCORDING TO ERRATA BELOW THEN CHECK THE FOLLOWING TABLE FOR YOUR INSTRUMENT SERIAL PREFIX 3 DIGITS OR SERIAL NUMBER 8 DIGITS AND MAKE ANY LISTED 51 IN THE MANUAL NEM TEM GS T b imde Die usn SERIAL PREFIX NUMBER pasti MAKE MANUAL CHANGES SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES CHANGE 1 NOTE This change provides for the new standard panel color MINT GRAT for plug in instruments The former standard color LIGHT GRAY is available as color option 85 Page 6 14 Table 6 1 Change MP21 to 05257 20085 add to description STANDARD MINT GRAY nr 2 Add MP20 00207 20002 PANEL FRONT OPTION A85 LIGHT GRAY d June 23 1971 Supplement A for i 05257 90013 1 560068 PRINTED I Lor 232 4 1 1 v 3 10009 25250 c 10 SHIELD SAMPLER ATTENUATOR ASSY AUTOMATIC PHASE CONTROL ASSEMBLY MO 03257 60038 NOTE 1 SERIES 976 E i ER ss 2 18010573 3 Ly 12 1834 0221 13VnE6 102 1854 0221 5 1 REFERENCE DESIGNATIONS WITHIN THIS ASSEMBLY ARE ABBREVIATED ADD ASSEMBLY NUMBER ABBREVIATION POR COMPLETE DESCRIPTION
84. NENT SIDE 4 V p pG 2 ms cm Waveforms taken with an HP 180A 1801A Vertical Amplifier and a 10004A 10 to 1 Divider Probe The 5257A in mode with no fx input VFO at 70 MHz 05 to 2 GHz range LEVEL fully CW N 001 and sampling Counter TIME BASE set 1 ms Pp eona T ae XAI2 INTERCONNECTOR UN UNDERSIDE 7 e gt e nm e 54 Sed y EA 4 som gt pr 2 Reda ge tems 4 w a nb se K 4 m cy I Brom n Yers 17 at ps 4444 die le M e ATA 51484 2 arto A tini Aq eM dt M 1225 gt ufo W W d THE END Rather a challenge as the scanned material is much like you see here some generations old MW March 2007 What follows is a useful download about nixie displays About half way through there is a description of the display used in this counter Nixie Displays NIXIE TUBE DISPLAYS The Nixie tube Numerical Indicator eXperimental was invented in 1952 by the Haydu brothers and soon commercialized by the Burroughs Corporation The standard display consists of ten individual digit wires inside a vacuum tube Applying a small amount of current at a relatively high volta
85. OG Ist gt gt tf bt P d t 50 1111 o C b O5 65 Q x t t 1 1 oL 63 O5 09 09 C3 C2 CI NN 0000 1 141 14 DOD Cn Ch cm oi o Q QI o cn P 1 e Tabie Figure 1 1 i gt Pop 625262 63 63 C2 LI 0 1 1 1 1 1 1 1 lt UT CI co cO 1 NJ LIST OF TABLES Specifications Truth Table Assembly Designations 22 Recommended Test Equipment In Cabinet Performance Check Troubleshooting Chart Reference Designation Index Replaceable Parts t Code List of Manufacturers Prescaler Assembly 05257 60013 LIST OF FIGURES Model 5257A APC Lock Range Maximum FM in APC Mode 3 Pulsed Carrier Measurement Error Zero Beat at PULSED RF OUT 52574 Down Conversion Frequency Spectral Density of VFO Oscillator Tuning Typical System Sensitivity Pulsed RF and FM Measurement CW and FM Measurement 525 Input Connector and Attenuator Functional Block Diagram Waveforms IC Logic Gate UN Switch Diagram Preset Divider 15 18 GHz Check Bottom and Sides Internal Views Top Bottom and Side Internal Views A3 A4 Assembly
86. ON PNP 1854 0003 TRANSISTOR NPN SILICON 1854 0005 TRANSISTOR SILICON NPN 2N708 1854 0019 TRANSISTOR SILICON 1854 0048 TRANSISTOR SILICON NPN 2N2857 1954 0053 YRANSISTOR SILICON 2N2218 1854 0071 TRANSISTOR SILICON NPN 1854 0613 TRANSISTOR SILICON NPN 1854 0215 TRANSISTOR SILICON NPN 2N3904 1854 0221 TRANSISTOR DUAL SILICON NPN 1854 0238 TRANSISTOR SILICON 2N3933 1854 0273 TRANSISTOR SILICON 1854 0323 TRANSISTOR NPN 2N2857 1854 0345 TRANSISTOR 2N5179 28480 28480 28480 28480 28480 28480 28480 28480 28480 28 80 28480 28480 28480 28480 I 28480 28480 28480 28480 128480 28480 28480 28480 71785 28480 81312 181312 81312 128480 04113 01295 28480 28480 28480 28480 28480 28480 28480 02735 28480 29480 04713 28480 28480 28480 28480 02735 28480 02735 0151 0950 0757 0951 0757 0952 0757 0953 0757 0954 0757 0955 0757 0957 0757 0958 0757 0960 0757 0962 0757 0965 0757 0972 0757 0915 0760 0022 0761 0042 0890 0048 1120 1495 1250 0102 1251 0095 1251 0159 1251 0160 11251 0382 456 99 99 1251 1511 41605 MRAC 14P6 MRAC 145 1500 0014 MCBGEN TV Suo iS gu N SN463L 1853 0009 1853 0015 1853 0020 1853 0036 1853 0054 1854 0003 24708 1854 0019 1854 0048 2 2218 1854 0071 1854 0073 1854 0215 1854 0221 283933 1854 0273 2N2857 2 5179
87. ONVENIENCE IN DIAGRAMS C COUNTER BLOCK DIAGRAM B CO WEIGHTING FACTOR 2 2 4 B FEED AHEAD RESET LINES FROM N SWITCHES Section Maintenance Troubleshooting SECTION V MAINTENANCE AND TROUBLESHOOTING 5 1 INTRODUCTION 5 2 This section gives maintenance adjustment and troubleshooting information for the Model 525 7A Transfer Oscillator 5 3 ASSEMBLY CONNECTION AND IDENTIFICATION 5 4 Throughout the manual connections to printed circuit assemblies are referred to in abbreviated form For example the connection to pin 12 of assembly A4 is A4 12 5 5 ASSEMBLY DESIGNATIONS 5 6 A list of assemblies is given in Table 5 1 5 7 RECOMMENDED TEST EQUIPMENT 5 8 Recommended test equipment is listed in Table 5 2 Test instruments other than those listed may be used if their specifications equal the required characteristics 5 9 IN CABINET PERFORMANCE CHECK 5 10 An in cabinet performance check is given in Table 5 3 Table 5 1 Assembly Designations Assembly Number and Description HP Part No Al Pulse Driver 05257 60008 05257 60211 0901 0573 05255 6020 05257 60038 Stripline Pulse Generator Sampler Attenuator APC No 1 Regulator Pulsed RF APC No 2 05257 60007 05257 60006 Var Freq Oscillator ATAI VFO Linearizer ATA2 Control ATA3 VFO 05257 60044 05257 60004 05257 60012
88. OPERATING AND SERVICE MANUAL TRANSFER OSCILLATOR 5257A i HEWLETT p PACKARD ds VESES dH TRANSFER OSCILLATOR 5257A SERIAL PREFIX 1104A This Operating and Service Manual applies to HP 5257A instruments with serial num ber prefix 1104 SERIAL PREFIXES NOT LISTED For serial prefixes above 1104A a Manual Changes sheetis included with this manual For serial prefixes 748 804 820 848 928 and 976 see Section HP 52451 MODIFICATION See Paragraph 2 15 for HP 52574 use in HP 5245L Counters having serial prefix numbers 516 402 or 335 and below Copyright HEWLETT PACKARD COMPANY 1968 1501 PAGE MILE ROAD PALO ALTO CALIFORNIA 0 5 Printed 1971 HEWLETT fp PACKARD Tanie of Contents Section I IH IV Vi vi TABLE OF CONTENTS GENERAL INFORMA TION 1 1 Description 1 7 Specifications 1 9 Instrument Identification 1 12 Cooling INSTALLATION 2 1 Introduction 2 3 Unpacking and Inspection 2 5 Storage and Shipment 2 8 Installation 2 1 11 Power Requirements 2 13 Electrical Connections 2 15 Modifications OPERATION 3 1 Description 125 3 13 Controls and Inputs 3 23 Input Voltages 3 26 Calculation of N 3 31 Verification of Harmonic Number N THEORY OF OPERATION 4 1 General 4 3 Functional Block Diagram 4 11 Component Identification 4 14 Pulse Driver 1 4 17 Pulse Generator A2
89. PACKARD 5332A PRESET CONTROLLER COUNTER Quantity one 53225 o CONTROLLEN COQNTEN ITRON 650 FREQUENCY COUNTER Quantity one KEITHLEY 600 DIGITAL MULTIMETER Quantity one MONSANTO 100C COUNTER TIMER Quantity one MONSANTO 106A REVERSIBLE COUNTER Quantity one MONSANTO 1500A COUNTER TIMER Quantity one Send comments to Dan Veeneman Click here to go to the wanted page Click here to go to the home page Last updated June 17 2006 http www decodesystems com nixie html 7 of 7 9 03 2007 11 28 29 http www decodesystems com nixie book figl gif Fig 9 14 Cold cathode digital readout Nixie with decoder and driver Courtesy Burroughs Corp http www decodesystems com nixie book fig1 gif9 03 2007 11 28 48 http www decodesystems com nixie book fig2 gif ISK ANODE i NIXIE TUBE 94967865 n 0123456789 DECIMAL POINT BCD TO DECIMAL DECODER DRIVER 7441 D D QUAD BISTABLE LATCH 7475 MEE TO NEXT MOST SIGNIFICANT DIGIT COUNTER INPUT SERIAL INPUT FROM LESS DECADE COUNTER SIGNIFICANT DIGIT COUNTER 7441 RESET STROBE Fig 9 15 Nixie R tube and associated circuitry http www decodesystems com nixie book fig2 gif9 03 2007 11 29 06 http www decodesystems com hp nixie board 7 jpg http www decodesystems com hp nixie board 7 jpg9 03 2007 11 30 02 vL
90. R FXD COMP 820 OHM 5 1 8H ATA3R19 0757 0914 R FXD FLM 390 OHM 2 1 uy 20 0157 0914 R FXD MET FLM 390 OHM 2 1 4w ATA3R21 0698 5565 R FXD CARBON 2 2K OHM SX 1 8W ATA3R22 0698 5565 R FXD CARBON 2 2K DHM 5 1 8 See introduction to this section for ordering information 6 10 YO Section VI Parts Table 6 1 Reference Designation Index Cont d ATA3R23 ATA3R24 1 2 8 1 8 2 A8C3 A8C4 8 5 A8C6 ABC A8C8 8 9 8 10 A8CR1 ABCR2 801 802 A8Q3 804 A8Q5 806 A8Q7 A8Q8 A8R1 A8R2 A8R3 A8R4 A8R5 ABRG A8R8 A8R9 10 A8R11 A8R12 A8R13 A8R14 A8R15 A8R16 A8R17 A8R18 A8R19 A8R20 A8R21 A8R22 A8R23 A8U1 A8U2 A8U3 0757 0927 0757 0927 05257 60017 05257 60017 05257 60039 05257 20039 0160 2327 0150 0093 0150 0093 0160 2743 0160 3277 0160 3277 0150 0093 0150 0093 0150 0093 0150 0093 1902 3104 1901 0179 1854 0048 1854 0048 1854 0039 1853 0034 1853 0034 1853 0034 1853 0034 1854 0215 0683 2025 0683 2025 0698 3374 Not Assigned 0698 5996 0698 5996 0757 0928 2100 2521 0698 3378 0698 3111 0757 0918 0698 5996 0757 0893 0758 0024 0758 0024 0757 0926 0757 0937 0698 3378 0751 0893 0757 0923 Not Assigned 0698 3378 0757 0909 1820 0286 1820 0712 1820 0712 R FXD MET FIM 1 3K OHM 2 1 4W R FXD MET FLM 1 3K OHM 2 1 4W TRANSFORMER ASSY VFO TRANSFORMER ASSY VFO BOARD ASSY P
91. RESCA LER BOARD BLANK PC C FXD 0 001 UF 100 VDCW 01 UF 80 20 100 VDCW 01 UF 80 20 100 VDCW 3 PF 10 200 VDCW 01 UF 20 50 VDCW 01 UF 20 50 VDCW 01 UF 80 20 100 VDCW 01 01 0 rz tz 888888882 80 20 100 VDCW UF 80 20 100 VDCW 1 UF 80 20 100 VDCW 1 O QG Q Q G OQ 0 0 3 0 0 0 0 0 CIPXD 0 DIODE BRKDWN 5 82V 5 DIODE SIL TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR NPN 2N2857 NPN 2N2857 PNP 2N3053 PNP SIL PNP SIL PNP SIL PNP SIL PNP 2N3904 R FXD COMP 2000 OHM 5 1 4W R FXD COMP 2000 OHM 5 1 4W R FXD COMP 20 OHM 5 1 8W R FXD COMP 560 OHM 5 1 8W FXD COMP 560 OHM 5 1 8w FXD FLM 1500 OHM 2 1 8W VAR 2000 OHM LIN 10 1 2W FXD COMP 51 OHM 5 1 8W FXD COMP 30 OHM 5 1 8W FXD FLM 560 OHM 2 1 8W XD COMP 560 OHM 5 1 8w XD FLM 51 OHM 2 1 8W XD FIM 100 OHM 5 1 4W XD FLM 100 OHM 5 1 4W XD FLM 1200 OHM 2 1 8W XD FLM 3600 OHM 2 1 8W FXD COMP 51 OHM 5 1 8W FXD FLM 51 OHM 2 1 8W i FXD FLM 910 OHM 2 1 8W mm J q D UU 550508 R FXD COMP 51 OHM 5 1 8W R FXD FLM 240 OHM 2 1 8W CIRCUIT INTEGRATED SCHMITT CIRCUIT INTEGRATED BINARY CIRCUIT INTEGRATED BINARY Section VI Parts Table 6 1 Reference Designation Index Cont d R 9 A9C1 A9C2 A9C3 9 4 A9C5 A9C6 ASC ASCE A9C9 ASCRI A9CR2 A9CR3 A9IC1 A9IC2 A9IC4 A9L1 A9L2 A9Q1 A9Q2
92. Schematic A4 Component Locator 11 Component Locator 8 Component Locator 8 Schematic Schematic Diagram Notes Block Diagram 1 Pulse Driver A2 Stripline Pulse Generator Sampler 4 Automatic Phase Control No 5 Regulator and Pulsed RF Output 11 Power Supply Filter Automatic Phase Control 2 AT Variable Frequency Oscillator 8 Prescaler and Inhibit 9 Gate Time Extender A10 Preset Decade b CO LI LI LI 09 I 020 C2 C CO 4 Mob c3 wn 4 ay i AI 1 List ot Tables List of Figures Page 1 a L 4 j 1 1 M 1 1 E d MID 1 2 Q ES 1 1 bos m2 231 to Section General Model 5257A Figure 1 1 dieses A Model 5257A Section General SECTION GENERAL INFORMATION 1 1 DESCRIPTION 1 2 The Hewlett Packard Model 5257A Transfer Oscillator plug in extends to 18 GHz the frequency measuring capa bility of Hewlett Packard counters series 5245L 5245M 5246L 5247M 5248L M and the 5345A It features simple one dial tuning direct readout of input frequency and a front panel meter for zero beat detection Both cw and pulsed rf signals can be quickly and easily measured with this unit For cw signals an automatic phase control APC circuit securely locks the internal VFO to
93. TA1R2 0751 0912 R FXO MET FLM 100K OHM 2 1748 ATAIR3 0757 0939 R FXD MET FLM 4300 OHM 23 1 46 184 0757 0920 R FXD FLM 680 OHM 2 1 4W 185 0151 0963 R FXO MET FLM 43K OHM 2 1 49 ATAIRE 0757 0934 RIFXD MET FLM 2 7K CHM 2 1 4W See introduction to this section for ordering information 8 Reference Designation 7 187 8 7 1 8 A7A1R10 ATA1R11 1812 ATALR13 1814 1815 1816 ATAIR17 A7A1R18 A7A1R19 A7A1R20 A7A1R21 ATA1S1 ATAZ 2 ATA2C2 ATA2CR1 ATA2CR2 ATA2CR3 211 2 1 282 283 254 1 2 ATA3C4 5 ATA3C6 ATA3CT 0757 0938 0698 5575 0698 3379 0698 3379 0898 5562 0698 5075 0699 5174 0698 3114 0698 6649 0698 6648 0698 6648 0757 0952 0757 0934 0757 0948 2100 1773 3100 2420 05257 60012 05257 20012 0160 0183 0160 2327 0122 0301 0122 0301 1901 0179 05251 60022 0757 0482 0757 0946 0751 0482 0757 0932 05257 60003 05257 20003 0140 3060 0121 0405 0160 2327 0150 0031 0150 0034 0160 2327 0160 2327 Table 6 1 Reference Designation Index Cont d R FXD MET FLM 3 9K OHM 25 1 4w R FXD COMP 33 OHM 5 1 8W R FXD COMP 68 OHM 5 1 8W R FXD COMP 88 OHM 5 1 8W R FXD CARBON 120 OHM 5 1 8W R FXD COMP 130 OHM S 1 4W R FXD COMP 200 OHM SZ 1 8w R FXD COMP 300 OHM 5 1 8W R FXD COMP 390 OHM 5 L 8W
94. TER GENERATOR A2 le 2 t8 GHz PERIOD SIGNAL CZ 71 71 FROM COUNTER START PRESCALER GATE TIME EXTENDER STOP 9 DENCE NL2 IBGHz 4 05 28 COUNT I ONLY DECADES EM THUMBWHEEL SWITCHES 05 26 vFO vFO CONTROL LINE ARIZER COMPEN AJAI SATION PULSED RF OUT AND LEVEL DET COUNTER INPUT Section IV Theory 4 8 The feedback loop output of the variable gain amplifier goes through a range compensation circuit which connects to VFO linearizer ATAL Range compensation is variedin steps with the range switch for optimum phase locking from 0 05 to 18 GHz The linearizer compensates for the non linear VFO gain characteristics overthetuning range In the PULSED RF mode the feedback loop is disabled in the line arizer Linearizer output is a dc voltage applied to control A7A2 Voltage controlled capacitors in control 2 hold the VFO frequency in phase lock when in the APC mode Thus the loop is completed 4 9 VFO istunable between 66 7 to 133 3 MHz and its output goes to two buffers The first buffer provides input to pulse driver 1 whenthe Model 5257A is switched to the frequency ranges above 200 MHz The second buffer provides VFO input to a divide by four prescaler A8 Output C of the prescaler goes to puls
95. UENCY MHz is retuned to an adjacent zero beat or phase lock and the counter readout is recorded as fg The first frequency f1 divided by the difference in the frequencies yields harmonic number N of the second frequency fa slide rule accuracy is permissible EXAMPLE 1 Assume unknown fy is approximately 11 9 GHz Time Base I ms a Where fg is lower than 1 fx N 1 fy and fy N f1 f1 fo fy 119532 kHz read on counter tuning lower in frequency gives fo 118349 kHz read on counter 1183 f f 44837 kHz N 119 5 1 183 101 set thumbwheels to 101 101 x 118 349 11953261 kHz read on counter fx Section IIT Operation b Where fo is higher than fy f N 1 fy and fy Nf fy 119532 kHz read on counter tuning higher in frequency gives fo 120740 kHz read on counter fo f 1208 kHz N 119 5 1 208 99 set thumbwheels to 99 f 120 740 x 99 11953261 kHz read on counter EXAMPLE 2 Assume unknown fx is approximately 1 1 GHz Time Base 1 ms a Where fg is lower than fy f1 110000 kHz read on counter tuning lower in frequency gives f9 100000 kHz read on counter fy f 10000 kHz 110 10 11 Set thumbwheels to 11 fy 11 x 100000 1100000 KHz b Where f is higher than fy fy 1100000 kHz read on counter tuning higher in frequency gives 122000 kHz read on counter fy fg 12000 kHz 110 12 9
96. UHF Signal Generator Range 1 8 to 4 2 GHz Adapter Coupler Waveguide Extender Board Extender Board Characteristics 50 MHz bandwidth with external sync capability 10 1 10 pf de to 50 MHz Voltage Range 10 mV to 10 V rms Frequency Range 500 kHz to 1 GHz Range 1 mV to 1 kV Impedance 200 Megohms Range 10 pW to 10 mW Frequency Range 12 4 to 18 GHz Max SWR 1 5 1 Range 10 MHz to 480 MHz Range 8 GHz to 2 1 GHz Range GHz to 11 GHz capable of pulsed output Pulse Rate 400 sec Pulse Width 5 usto 10 us Range dc to 50 MHz serial no 402 or above BNC connectors on both ends 48 inches long 50 Pin male to 50 Pin female Type N male connector on both ends 6 feet long Waveguide to APC 7 female APC 7 male to Type male 3 dB Directional coupler P band Flexable waveguide P band 15 Pin male to 15 Pin female 12 Pin male to 12 Pin female 5 21 Sampling Check 5 22 This check is made by observing output of the PULSED RF OUT connector onthe front panel with an oscilloscope Set 5257A controls as follows LEVELADJ oe as clockwise MODE APC b Observe the 1 kHz inhibit signal A level of 400 to 500 mV peak to peak indicates correct sampling If the level is 5 to 6 V peak to peak no sampling is Table 5 2 Recommended Test Equipment Recommended Type HP 180A with 1801A and 1820A plug ins HP 10004A HP 411A HP 412A HP 431C HP P486A HP 608C D
97. VIETNAM Peninsular Trading inc P 9 H 3 216 Hien Ywong Tel 20405 93398 Cable PENTRA SAIGON 242 ZAMBIA R j Tilbury Zambia tta P O Box 2792 Zambia Central Atrica MEDITERRANEAN AND MIDOLE EAST COUNTRIES NOT SHOWN PLEASE CONTACT Mewlett Packerd Correspondence Office Piazza Marconi 25 1400144 Rome Eur taiy Tel 6 59 40 29 Cable MEWPACKIT Rome Teles 61514 Hembett Pachare Far Last Area Office PO 87 Alexandra Post Office Singapore 3 Tel 633022 Cable MEWPACK SINGAPORE OTHER AREAS LISTED CONTACT Hewiett Packard INTERCONTINENTAL 2200 Hiliview Ave Palo Alto California 94304 Tei 415 326 7000 Feb 71 493 1503 910 373 1267 Cadie HEWPACK Palo Alte Teles 034 8461 SECTION VIII CIRCUIT DIAGRAMS 8 1 INTRODUCTION 8 2 This section includes the following a General Notes for Schematic Diagrams aregiven in Figure 8 1 b Block Diagram Figure 8 2 c Schematic Diagrams and Component Location illustrations of Model 525 circuits assemblies and connectors in the order of their assembly designation Al through A11 Figures 8 3 through 8 10 These figures also include voltages 8 3 The Block Diagram or any schematic diagram when unfolded can be used with any other part of this manual or with the manual closed 8 4 Devoltages are measured with a HP Model 412 DC Voltmeter Typical voltages are shown Section
98. and Beg isthe equivalent power bandwidth The values of Sg for the Model 5257A VFO can be obtained from the curves of Figure 3 6 Refer to Hewlett Packard Journal March 1967 Application Note No 87 and HP 5210A Manual 3 11 The thumbwheels extend the counter gate time in increments of units tens and hundreds causing the counter to read directly the sampling frequency and its multiples With the thumbwheels set at 001 the counter reads the fundamental sampling frequency At any other setting the counter reads a multiple of the sampling frequency Thus to directly read the frequency it is only necessary to find the proper har monic N number and set the thumbwheels to this number Calculation of N is described in Para graphs 3 26 through 3 30 Figure 3 4 Zero Beat at PULSED RF OUT PULSE PRESENTATION Y M 1 CYCLE PER PULSE WIDTH TE 1 10 CYCLE PER PULSE WIDTH 1 100 CYCLE PER PULSE WIDTH Model 5257A 3 12 For basic set up of the counter used with the Model 5257A plug in unit refer to the appropriate counter operating manual When the counter s FUNCTION switch is positioned at PLUG IN the counter s accessory connector plug is activated and the counter receives its input signal from the Model 52574 Also the counter s gate time control is taken over by the Model 5257A but the setting of the counter s Figure 3 5 52574 Down Conversion fx WITH fm MODEL 5257A SAMPLER
99. ar that part of the main housing con taining the sampler CAUTION When removing this assembly be careful not to bump housing against sampler diode pro truding through side of main housing Also do not scrape gears against any portion of main housing j After the gear train is removed set it down in such a way as to prevent any damage to gear teeth 5 10 5 40 Gear Train Replacement 5 41 Reverse disassembly procedure after doing the following a Check main housing wiring for shorts broken wires etc Make sure cables are dressed properly so they will not be pinched during assembly b Install paper insulators over exposed main housing connector Make sure paper stays in place when installing gear train 5 42 During assembly while fitting front panel over gear train check that LEVEL ADJ shaft is correctly inserted in hole on main casting Also make sure gears on gear train the gears on main housing 5 43 After assembly the FREQUENCY dial will have to be repositioned for correct reading Refer to FREQUENCY dial check Table 5 3 U 6 1 INTRODUCTION SECTION VI REPLACEABLE PARTS Section VI Parts 6 3 Miscellaneous parts are listed at the end of Table 6 1 6 2 This section contains information for ordering replacement parts Tabie 6 1 lists parts in alpha numerical order of their reference designators and indicates the description and HP part number of each part together with an
100. ass Telex Cotp Tulsa Okla Thomas Betts Cc Elizabeti N j Tnglett Eleciuca ins Co Bluffton Ohio Union Sasten 330 Sigra Div of Westinghouse Ast Co Universal Cz Ward Leonasc Mt Veroa Western Electric Co Inc New York N Y Weston inst Inc Wesiin Newark Newata N J Witten Mfg C Chicago ill Minnesota Moning amp tz Co Revere Mincom Div t Paul Minn Hartford Conn New York N Y Wiciowave 8 Poner Div Roman Contiguler 03 Pittsbuiga Owosso Mich Allen Mfg Allied Coats Allmetat Seisa Produc Co Inc Garden City Y Altantic lacis Rutbe orks Inc Chicago Itt Ampente Co Inc Union City N J ADC Products Inc Minneapolis Winn Belden Chicagz 111 Bard Etecticnic Cleveland Ohio Bunbach Rec Cc New York Y Boston Gear works Div cl Murtay Co ot Texas Quincy 4255 Bud Radio inc Willoughby 3hio Camloc Fastener Coro Paramus J Cardwell Ccncenser Corp Lindenhurst L t Sussmann tg Div c McGraw Edison Co St Louis Mo 00015 44 Revised September 1967 Code No 71436 71447 11450 11468 21471 71482 71590 11616 11700 11107 11744 71785 71981 11136 12613 11656 72699 11165 12825 72928 12964 12982 13061 73076 73138 73293 13445 23506 73957 13276 11455 13861 13368 Monufacturer Address Chicago Condenser Corp Chicago ill Spring Co
101. ations Concentric knobs on this dial provide coarseand fine tuning Coarse tuning Figure 3 6 Frequency Spectral Density of VFO JY S M Hr E Hz o Ui 100 Sey f FREQUENCY SPECTRAL DENSITY OF VFO 115125 1111 1000 IOK FREQUENCY Hz Section Operation Figure 3 7 Oscillator Tuning y x 5 5 B x 3 5 OSCILLATOR FREQUENCY MHz has a 63 to 1 gear reduction while the fine tuning has a 632 to 1 reduction The oscillator is settable to 1 20 of a degree with fine tuning See Figure 3 7 for oscillator tuning characteristics 3 17 METER Inthe PULSED RF mode the meter reads the relative amplitude of the difference frequency beat between the VFO harmonic and the input signal At nine tenths of full scale a red division line marks the optimum level at zero beat for Model 5257A fre quency measurements In the MODE the meter monitors phase error of the phase lock loop Zero phase error deflection is nominally at mid scale When out of phase lock in the APC MODE the meter reads the nominal mid scale deflection In phase lock the meter reads above below or at the zero phase error deflection depending upon phase error 3 18 MODE Selects PULSED RF and APC modes This is the red knob concentric with the RANGE se lector knob 3 19 THUMBWHEEL SWITCHES The thumbwheels are set to harmonic numbers N of the
102. bra to the plug in guide d Remove right rear side bracket Disconnect Winchester connector 13 VFO housing f Removethelour screws holding the V FO bossin the main housing Section Maintenance and Troubleshooting Table 5 3 In Cabinet Performance Check FREQUENCY DIAL CHECK 1 With Counter OFF connect 52574 to Counter plug in compartment using 105068 cable 2 Turn Counter ON and set controls on Counter as follows SENSITIVITY PLUG IN TIME BASE 0 1 ms FUNCTION FREQUENCY 3 Set controls on 52574 as foliows thumbwheels 001 MOLDE a eg a PULSED RF RANGE 222602 952 2 1 GHz FREQUENCY 100 MHz Counter should read approximately 100 00 MHz COUNTER GATE EXTENSION With controls set as above adjust thumbwheels from 001 to 009 001 002 etc Counter should read 100 MHz to 900 MHz in steps of 100 MHz Adjust thumbwheels from 010 to 090 Counter should read 1000 MHz to 9000 MHz in steps of 1000 MHz Adjust thumbwheels from 100 to 300 Counter should read 10000 MHz to 30000 MHz in steps of 10000 MHz APC ADJUSTMENT Set 52574 MODE to APC and LEVEL ADJ fully clockwise 5257A meter should read center scale If meter reading is incorrect turn Counter off and remove 52574 from plug in compartment Connect 10506B extender cable to 52574 and jack in Counter plug in com partment Turn Counter on With
103. cription of the part REFERENCE DESIGNATORS fuse MP filter P integrated circuit Q jack R relay RT inductor 8 loud speaker T meter TB microphone TP ABBREVIATIONS N O NPO henries hardware hexagonal mercury hour s hertz intermediate freq impregnated incandescent include s insulation ed internal NPN kilo 1000 left hand linear taper lock washer logarithmic taper low pass filter milli 1073 meg 106 metal film metallic oxide manufacturer mega hertz miniature momentary mounting mylar nano 10 9 normally closed neon nickel plate mechanical part plug transistor resistor thermistor switch transformer terminai board test point H U NHM N n H H 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 printed circuit picofarads 10 12 phosphor bronze Phillips peak inverse voltage positive negative positive part of polystyrene porcelain position s potentiometer peak to peak point peak working valtage rectifier radio frequency round head or right hand wow u h nm u 4 4 H n uw nw RMO RMS RWV 5 SCR SE SECT SEMICON SI SIL SL uu MH Ho nu i M W 6 6 To obtain part that is not listed include d Function and location
104. damage in the sampler Peak voltage is the critical quantity rather than average or rms values Know the signal voltage before applying it to the INPUT jack Use attenuators as a precautionary measure where the input voltage is questionable Extra care should be taken with pulsed signals since short voltage spikes canbe just as damaging as steady state values The maximum permissible input voltage is 2 volts peak to peak equivalent to 0 707 volts rms 10 dBm for a cw carrier 3 25 MINIMUM INPUT VOLTAGE A minimum input amplitude is specified to assure proper instrument operation even though it may respond to lower am plitudes Figure 3 8 gives typical system sensitivity versus input frequency The Model 5257A will meas ure input signals from 05 to 15 GHz with amplitudes in excess of 100 mV 7 dBm and from 15 to 18 GHz with amplitudes in excess of 140 mV 4 dBm using a VFO frequency of 125 to 133 3 MHz The input level should be sufficient to allow adjustment of meter de flection to the red indicator line 3 26 CALCULATION OF N 3 27 For frequency ranges above 2 GHz if the input signal frequency is knownto within the sampling frequency from 66 7 to 133 3 MHz the harmonic number N can be found directly In this case esti mated input frequency fx is divided by sampling fre quency fg as read on the counter with thethumbwheels set at 001 The answer is fx fy where fg equals VFO frequency fy Figure 3 8 Ty
105. e driver A1 when the Model 5257A is switched to the 50 to 200 MHz range This gives a tunable sam pling rate from 16 7 to 33 3 MHz The other prescaler output if passed by the inhibit amplifier goes to the counter input gate on line A for frequency counting on all ranges Thus on the lowest range counter pre scale isN and on the three highest ranges the counter prescale is 4N 4 10 The thumbwheel switches A8 preset decades A9gate time extender control the counter s start stop and are separate from the transfer oscillator portion The thumbwheels are set to the transfer oscillator VFO harmonic number N which zero beats withthe input signal being measured Thethumbwheels activate switcheswhich set the conditions of thethree binary decades of A8 in units tens and hundreds The decades start counting at start and provide a co incidence gating pulse to the gate time extender when the count period is completed for stop In this way gate time extender A9 controls the counter s start stop time so the readout is the actual measured fre quency Range switch 51 turns off divide by four in A9 for the 50 to 200 MHz range and turns it on in the other ranges to give a correct count when A8 pre scaler is switched Therefore when the thumbwheels are set at 001 the counter will display the sampling frequency to pulse driver A1 in all ranges 4 11 COMPONENT IDENTIFICATION 4 12 The complete reference designator for a com ponent mou
106. e four ranges of 0 05 0 2 0 2 1 0 1 0 4 0 and 4 0 18 GHz is provided across the signal line from APC No 1 A4 6 to VFO linearizer input P3 A The circuit consists of Q1 amplifier accepting the input signal and a series of switched loads for 01 The loads are Q4 06 Q9 Q12 withtheir associated resistors and capacitors Diodes connected to these transistors e g CRI CR2 switch the loads for 01 either or off according to range switch 51 setting As an example the operation of Q4 load is described the others are identical Initially CR1 is biased on from 13 volts through R4 to 10 volts through R9 The base of PNP transistor 04 is then slightly positive due to the voltage divider ratio o R9 R8 and CR2 is off as well as Q4 When range switch S1 is set to 05 2 GHz is biased off by the 10 volts applied to Q4 base goes nega tive to turn on Q4 which acts as an emitter follower tothe output line and CR2 goes on which connects Q1 to this load and R11 furnish the required loop compensation for the 0 05 to 0 2 GHz range 4 34 AMPLIFIER AND LEVEL DETECTOR Transistors Q2 and Q3 are a feedback amplifier for the 1 kHz inhibit signal from No 1 A4 1 Q2 is common emitter NPN transistor amplifier with feedback coupling resistor R8 in the emitter circuit collector signal of Q2 drives PNP transistor Q3 Q3 collector connects through R10 to Q2 emitter completingthe negative feedback
107. e separation between harmonics on the three highest frequency ranges A four to one divider prescaler reduces the V FO fre quency for counting and sampling in the 05 to 2 GHz range The VFO is inherently very stable which is useful when using the unit as a down converter But as a transfer oscillator the automatic phase control mode for cw signals eliminates any drift effects and in the pulsed rf mode the short time it takes fora measurement makes drift effects negligible 3 4 To compensate for wide variations in input signal levels and the very wide range of input frequencies for which the Model 5257A is designed a leveladjustment is provided on the front panel This control labeled LEVEL ADJ should be turned fully counterclockwise before applying the input signal Whentuning into zero beat withthe MODE switchinthe PULSED RF position the meter pointer will rise and reach a maximum at zero beat LEVEL is then turned clockwise until the maximum meter deflection sits at the red scale line located at nine tenths of full scale An exception may occur with very stable cw input signals In these cases the meter reading might drop to zero at exact zero beat so the level adjustment is made when tuned outside the dip 3 5 At all times observe the maximum allowable input signal power of 10 dBm for cw carriers and 2 volts peak to peak voltage for any signal Exceeding these limits may seriously damage the hot carrier diodes of
108. ge causes the wire to glow illuminating the digit Nixies have long since been replaced by light emitting diode LED and liquid crystal LCD displays but I am interested in collecting and preserving these classic pieces of electronic history If you have any Nixie tube devices or drivers just gathering dust that you d like to get rid of please send me an e mail and we can work something out I d also love to find actual Nixie clocks whether test equipment such as the Hewlett Packard HP 571B or commercially made units NIXIE BASICS Excerpted from Fundamentals and Applications of Digital Logic Circuits by Sol Libes 1975 Hayden Book Company Click on either Figure for a larger version Gas Discharge Display More commonly referred to as Nixie the gas discharge tube was introduced by the Burroughs Corporation in 1955 It is basically a cold cathode tube Figure 9 14 with separate cathodes in the shape of characters When a sufficient potential is applied approximately 175 volts between the selected cathode and plate the gas surrounding the selected cathode is ionized and glows Other types of gas discharge displays are available having glow bar segments to form in plane characters and also cathode rods to illuminate a printed or cut out character Figure 9 15 shows how a typical gas charge display tube is driven from TTL logic IC 7490 is a decade counter with parallel BCD output and serial count input The overf
109. hich feeds back an in phase signal voltage from Q2A s source to its drain for effective reduction of Q2A s gate to drain capacitance FET Q2B provides a de reference level to variable gain amplifier at Q5 base The reference level is adjusted with front panel APC BAL control R2 4 23 The reference de voltage and a 1 kHz signal are amplified by Q5 while the sampler output from QA is amplified by the opposite side of the A4 balanced variable gain amplifier Q6A and Q6B are current sources for Q5 and Q7 respectively and provide dc stability Q5 and 07 emitters are bridged by LEVEL ADJ RI chassis part to adjustamplifier gain for wide variations in input signal levels and frequency range Lower values of R1 reduce the emitter resistance of Q5 and 97 and increase gain and vice versa Ac and dc gain are both varied yet dc balance between the two sides of the amplifier is maintained 4 24 1 kHz OSCILLATOR The 1 kHz oscillator includes 91 Q4 and Q10 and is switched on in the APC Mode by removing the ground fromthe 1000 ohm RC feedback circuit The RC feedback consists of C6 R25 R22 C5 and R16 Q4 has a split load Collector resistor R12 is of low valueto provide a low amplitude 1 kHz output signal going through C4 to the reference node at Q2B Cland C3 bypass high fre quencies to improve the 1 kHz sinewave 04 emitter load resistor R8 couples the feedback signal to Q1 emitter Ql is a common base stage which drives Q10 Q10 is
110. iased at 25 to 35 volts DC w r t either filament connection through current limiting resistors 10k or so Equipment Listing The following is a list of some Nixie equipment in my collection CALCULATORS WITH NIXIE DISPLAYS Casio 121 B AS L and FX 1 Commodore 512 Marchant I Monroe 610 1655 1710 1770 1775 SCM Cogito 412 414 Sharp CS 363R Silver Reed SE 702 Singer Friden 1114 1118 Sony Sobax ICC 400W ICC 500W Remington Rand 1259S The main calculator page is here 390 DIGITAL MULTIMETER Quantity one Uses four NL 840 type Nixies FAIRCHILD 7050 MULTIMETER Quantity one FLUKE 8100A DIGITAL MULTIMETER Quantity two IB 101 FREQUENCY COUNTER Quantity one HEATHKIT IB 102 FREQUENCY COUNTER Quantity one HEATHKIT IB 1100 FREQUENCY COUNTER Quantity one You can read a review of this counter here HEATHKIT IB 1101 FREQUENCY COUNTER Quantity one HEATHKIT IB 1102 FREQUENCY COUNTER Quantity one This is an eight digit 120 MHz counter You can read a review of this counter here HEATHKIT IB 1103 FREQUENCY COUNTER Quantity one This is an eight digit 180 MHz counter with phase locked multiplier HEATHKIT IM 1202 DIGITAL MULTIMETER http www decodesystems com nixie html 5 of 7 9 03 2007 11 28 29 Nixie Displays Quantity five This is a neat little 2 5 digit multimeter Tina a coni we a aria rate ma ws boom MI
111. ing cir cuit consists of Q3B Q4 Q5 Q6 and The collector of couples the signal to the base of Q7 which in turn drives Q6 Q6 is an emitter follower which charges C2 The long time constant of C2 and R9 holds the level developed between pulses 04 and 65 are a Darlington pair with a high input imped ance so that the loading on R9 C2 is minimal The resultant voltage on the emitter of Q4 and the bases of Q3B and is the de level across R9 2 plus the base emitter drops of 04 and Q5 and Q3B are emitter coupled so this voltage is compared with the peak ac voltage on the base of Q3A The difference is fed back through Q7 until the loop is stabilized at the peak ac voltage 4 29 DC AMPLIFIER and Q8B are a de amplifier to drive the meter The de voltage leve romthe peak holding circuit is applied to the base of Q8A This voltage is nevative going with increasing amplitude With no signal input is conducting heavily Q8B is biased slightly negative by voltage divider R17 and R16 and is virtually held off Meter current derived from the voltage drop across RIS ix negligible With increasing input signal the base emitter bias drops its conduction decreases andits emitter voltage goes negative This increases the conduction of Q8B the voltage across R15 in creases and the meter deflection rises 4 30 13VOLT REGULATOR The series regulator for 13 volts consists
112. ing frequency f4 on Counter and record a Omit this step if input frequency fx is known within the sampling frequency f1 step 12 FUNCTION FERIOD AVERAGE When fy falls outside the limits of step 12 findadjacent zero beat to calculate N Tune FREQUENCY dial higher or lower to adja cent zero beat and carefully tune for maxi mum meter reading Read Counter and record this second frequency f9 Calculate Paragraph 3 26 With slide rule accuracy a Input frequency f known within sampling frequency Divide f by f to obtain N N 97240 Input frequency fx not known within sampling frequency Find difference between f1 and fo Divide f1 by the difference to obtain N N 1 fa fi or N fy fy fo Set N switches to calculated N number and read input frequency on Counter Verify N Turn N switches up one unit e g 080 to 081 or down one unit g 080 to 079 Tune FREQUENCY dial for adjacent zero beat indicated by peak on meter corresponding to the direction switches were turnedin step 16 lower for N 1 and higher for N 1 Counter should display the same frequency as step 15 Maximum N setting is typically 144 from 15 to 18 GHz and 225 from 05 15 GHz Paragraph 3 25 Section Figure 3 10 CW Measurement TIME BASE FUNCTION FERIOO AVERAGE SENSITIVITY VOLTS AMS FREQUENCY CAUTION Do not apply more than 1
113. just thumbwheels from 100 to 300 Counter should read 10000 MHz to 30000 MHz in steps o 10000 MHz c Repeat the above steps with the 5257A RANGE switch in 05 to 2 GHz position Counter readout should be 1 4 the readings shown above 5 20 If the readings in the previous testare correct AT 95 and 06 7 8 9 10 and thumb wheels are operating properly a If only some thumbwheel settings are correct check A10 and wiring to thumbwheels b If the previous check can be made in the 05 2 GHz range or any range above 05 2 GHz but not in all ranges check 9 9 1 ro Y Section V Maintenance and Troubleshooting H there is no readout check to see that Gate light is cycling If Gate lightis cycling itis good indicationthat 9 and 10 are operating Make sampling test de termine that VFO 15 operating If Gate light is not cycling A9 A10 or Counter is defective Suggested checks for Counter are 1 self check 2 sensitivity check and adjustment if necessary 3 50 MHz response check and 4 check power supply voltages with 5257A plugged in Instrument Oscilloscope Divider Probe RF Millivoltmeter DC VTVM Power Meter Thermistor Mounts VHF Signal Generator UHF Signal Generator SHF Signal Generator Electronic Counter Cabie Extender Cable Cable BNC T Adapter Adapter BNC female to Type N SHF Signal Generator Range 15 to 21 GHz
114. ler Mass 95330 21260 Conner Spring Mig San Francisco 8634 91345 Miller Dial amp Nameplate Co Et Monte Cali 9652 09015 44 Revised September 1957 6 22 Code List of Manufacturers Monufacturer Address Radio Materials Co Chicago ill Augat Inc Attleboro Mass Dale Electronics Inc Columbus Nebr Eico Corp Willow Grove Pa Gremat Mfg fac K F Development Co Wakelield Mass Redwood Catil Malco Mig Co Inc Chicago 11 Honeywell tac Micro Switch Div Freeport 11 Nanm Bros Spring Oakland Calif Tru Con nectar Elgeet Optical Co Inc Tensolite insulated Wire Co Inc Tanylown Wesbury Long Island Kearney J Peabody Mass Rochester N Y IMC Magnetits Corp Hudson Lamp Co Sylvania lecint Prod inc Semiconductor Div Robbins 8 Myers inc Stevens Mig Co Inc Contiots General Cable Corp Raytheon Co Comp Div Ind Comp Operations Scientific Electronics Products Inc Lovetana Colo Wagner Elect Corp Tung Sol Div Newark N J Curtiss Wright Corp Electronics Div East Paterson N J South Chesier Corp Chester Pa Cloth Products Inc Bellwooc HI Worceste Pressed Aluminum Corp Worcester 14255 Magnecrati Electic Co Chicago NI George Philbrick Researchers Inc Boston mass Woburn Mass Palisades Park N J Mansfield Onio Livingslon N J Bayonne Quincy Mass
115. lied 4 37 VARIABLE FREQUENCY OSCILLATOR ASSEMBLY A7 4 38 LINEARIZER A7A1 Input to the linearizer at A comes from APC 2 The input signal is the APC error at phase lock in the APC mode and the sampler beat frequencies inthe PULSED RF mode The input is applied to the base of Q1 Q1 and Q3 a balanced pair with Q2A and Q2B current sources in their emitter circuits Q3 base is at ground and Q1 base is 0 volt plus or minus the error voltage The emitters of Q1 and Q3 are bridged by R4 plus resistance R8 through R17 These resistors are switched sequentially by S1 with the VFO FREQUENCY MHz control to compensate feedback loop gainforthe decreasing VFO gain as it istuned from high to lower frequencies The total resistance is maximum at the highest frequency of 133 MHz for lowest gain and resistance is minimum at the lowest frequency of 67 MHz for highest gain 04 is emitter follower for isolation of Q1 voltage amplifier and the VFO voltage control circuit In the PULSED RF mode 15 volts is applied through R7 turning off Q2 Q1 and Q3 to disable the loop Base bias is applied to Q4 in the PULSED RF mode from divider R6 and R3 by turning on CRI through part of mode switch 51 4 39 VFO CONTROL 2 and CR2 voltage controlled capacitor diodes which shunt the VFO tuning capacitor to ground through C1 The diodes are reverse biased such that an increase in bias decreases capacitance and
116. lloscope 0 5 volt peak to peak Model 5257A Specifications PULSE CARRIER FREQUENCY MEASUREMENTS Minimum Pulse Width 0 5 usec Minimum Repetition Rate 10 pulses per sec Accuracy 0 01 cycle per pulse width typical error 20 kHz or less for pulse width gt 2 us 50 kHz lt 2 us VFO Frequency Range 66 to 133 3 MHz Drift With constant temperature in operational range of 0 to 55 C typically 2 parts 105 per minute immediately after turn on Typi cally 1 part in 107 per minute after 2 hours of operation Temperature Variation Typically 1 part in 104 per degree INPUT CONNECTOR Precision Type N female WEIGHT Net 7 1 4 lbs 3 3 kg Shipping 10 lbs 4 5 kg OPTION 001 Precision Type APC 7 input connector When used with HP 5245M 5245L serial prefix 402 or above 5246L M54 5245L or 5247M Counters Modification Kit 05293 6030 available to adapt HP 5245L serial prefix 335 and below When used with 5345A an HP 10590A Plug in Adapter is required Section Installation SECTION INSTALLATION 2 1 INTRODUCTION 2 2 This section contains information on unpacking inspection repacking storage and installation 2 3 UNPACKING AND INSPECTION 2 4 If the shipping carton is damaged ask that the carrier s agent be present when the instrument is unpacked Inspect the instrument for damage dents Scratches broken knobs etc If the instrument is damaged or fails to
117. loop Q3 output signal is coupled to through 4 35 Transistors Q5 97 and 8 a peak holding circuit for the 1 kHz inhibit signal which appears at phase lock the mode When the signal is absent the base of Q5A and Q5B are at 0 volt Since R14 goes to ground the transistors are mutually coupled by their emitters 1 kHz input signal is amplified by Q5A and Q8 and C10 is charged nega tively through CRT R24 gives long time constant PNP transistor Q7 is an emitter follower The C10 charge plus Q7 base emitter voltage appears on the base of Q5B Through the couplingtoQ5A the voltage on Q5B base goes negative up to the peak amplitude of the input signaland remains constant at that voltage 4 4 E LE o 4 36 The level detector consists of PNP transistors Q10 and Q11 With mode switch 51 set to PULSED 13 volts is applied to R35 and Q11 is biased off to disable the circuit In the APC position of 51 15 volts is applied to Q11 and it turns 911 then sup plies bias current to the inhibit signal output going to the prescaler and inhibit assembly A8 D when the input to the level detector is 0 volts Q10 is biased off until its base voltage goes more negative in response to an input signal to the peak holding circuit This turns 010 on which movesthe emitter of Q10 and 011 in the negative direction and Q11 turns off Thus the bias current to the inhibit signal output line to A8 D is app
118. low from the counter is used to operate the next more signficant digit display The BCD counter output is fed to a quad bistable latch IC 7475 which acts as a memory storage The count is stored in the IC until a strobe pulse allows the output of each latch to change This prevents the display from being a blur of changing numbers The BCD output of the latch is decoded by IC 7441 BCD to decimal decoder driver to a one of ten decimal output The IC also has high voltage driver transistors to drive the cathodes of the tube NIXIE DRIVE CIRCUIT The following is taken from Circuits for Digital Equipment by C J Dakin and C E G Cooke 1967 Where character readout is required multi cathode gas discharge tubes are used One method of construction is to make each cathode the shape of the character to be displayed For example one tube might have 10 cathodes in the shape of numerals 0 to 9 To cause the required cathode to glow a suitable voltage is applied between the anode and the selected cathode Typically the discharge will strike at about 80V and burn at about 60V The circuits to drive such tubes must therefore be able to supply such voltages A suitable circuit is shown in Fig 16 9 Note that when 77 is off the collector does not rise to 150V but is caught at about 80V provided one of the other cathodes is energized The disadvantages of this type of indicator are 1 The characters do not lie in the same plane 2 The numbe
119. lug intransferoscillator for use with Hewlett Packard 5245L 5245M 5246L and the 5247M counters It includes gate time pre setting circuits for display on the counter of theactual measured frequency This section describes opera tion of the Model 5257A system in Paragraphs 4 3 through 4 12 and its individual circuits in Paragraphs 4 14 through 4 58 NOTE After installing plug inunit and turning power on depress counter RESET button to ensure valid count or measurement 4 3 FUNCTIONAL BLOCK DIAGRAM 4 4 There are ten functional sections to the Model 52574 These are shown connected as a system in the functional block diagram of Figure 4 1 For circuit details refer to schematic diagrams in Figures 8 3 through 8 15 4 5 The frequency to be measuredis applied to wide band sampler The sampler is switched by pulse generator 2 at a rate determined by internal V FO ATA3 The sampler output represents phase difference between the sampler switching time and the input fre quency If the internal VFO harmonic is phase locked to the input frequency the sampler output will be a voltage proportional to phase error 4 6 There are many harmonics of frequencies tunable within the internal VFO range that will zero beat or phase lock with an input signal In operation the internal VFO can be tuned to any one of these The sampler output is amplified in the variable gain and dc amplifiers of A4 The gain is set by front pane
120. man N J Chicago iN San Francisco Calif St Marys Pa Waltham Mass Cleveland Ohio San Gabriel Calif Newtonville Mass Long island City N Y Hartford Conn Chicago It Signal Incicato Corp Struthess Duna lac Thompson Bremes amp Co Tilley Mig Co Stackpole Carbon Co Standard Thomsoa Corp Tinaesman Products Inc Transtormer Engineers Ucinite Co Waldes Koninoar inc Veeder Root inc Weaco Mfg Co Coatinentalr Wiit Electronics Corp Philadelphia Pa Zienca Coro New Rochelle N Y tepco Di s on 21 Sessions Clock Co Morristown Sznmitzer Alloy Products C Elizabeth N J n incusines Association Any brand Tota eating EJA Standaras Wasningion OC amaa Dv Maxon Electronics Corp Waltiagtord Conn sted Tianstzi7 er Coro New Zaterg Dore Chicago HI EPIIT Riverside Calit 3 2 Ne rtshaw Controls Co 5 011 Cebance Ohio Calit sammatizag tac New York N Y 22 Pat Josten Mass 91681141 27 ic SUL 6115 in Drange Grayn LaGrange IH Trad Trazstorc et Yenice diincneste Elec Civ Litter dng Inc Saavecte Conn Military Soecricatiaa ES iaternaticaa Rectilier Corg E Segundo Aupax Electronics Inc Cartridge Maryland Barry Cortis Barry angat Cere Watertown Mass Carter Precisico Cc Skokie tlt Scetti Faraca s Cooper dewstt Electra Zi Hososen N Jellers
121. maximum meter deflection with Counter reading close to 68 MHz Adjust Signal Generator for 9 10 full scale on 5257A meter Signal Generator output should be 7 dBm or less Set 5257 MODE to and adjust FREQUENCY for phase lock observe zero beat on Oscilloscope PULSED CARRIER CHECK 1 Set 52574 MODE to PULSED RF 2 Adjust Signal Generator output for pulsed RF output as follows pulse width 10 us and rate 400 sec Adjust 5257 FREQUENCY for zero beat on Oscilloscope Adjust 5257A LEVEL ADJ for 9 10 full scale on 5257A meter Set Signal Generator pulse width to 0 5 us 5257A meter should still read 5 10 full scale or more 15 GHz CHECK Connect 15 GHz at 16 dBm and Power Meter to 52574 INPUT as shown in Figure 5 1 Set 5257A MODE to APC and adjust LEVEL ADJ for 0 35 V peak to peak on Oscilloscope Set 52574 MODE to PULSED RF and adjust FREQUENCY for maximum meter deflection with Counter reading close to 68 MHz Adjust Signal Generator for 9 10 full scale on 5257A meter Power Meter should read 4 dBm or less Set 52574 MODE to and adjust FREQUENCY for phase lock observe zero beat on Oscilloscope Section Maintenance and Troubleshooting Table 5 3 In Cabinet Performance Check Cont d Figure 5 1 15 18 GHz Check HP 628A SIGNAL GENERATOR e FLEXIBLE 5257A WAVEGUIDE 11503A 1250 0749 APC 7 maie nu 348 DIRECTIONAL COUPLER HP 451
122. meet specification Performance Check Table 5 3 notify the carrier and the nearest Hewlett Packardsales and serviceoffice immediately sales and service offices are listedat the back of this manual Retain the shipping carton and the padding material for the carrier s inspection The sales and service office willarrange for the repair or replace ment of your instrument without waiting for the claim against the carrier to be settled 2 5 STORAGE AND SHIPMENT 2 6 PACKAGING Toprotect your instrument during Shipment or storage use the best packaging methods available Your Hewlett Packard sales and service office can provide materials similar tothose used for original factory packaging Contract packaging com panies can provide dependable custom packaging on Short notice a If possible use the original container designed for the instrument Otherwise use a strong carton 350 lb sq inch bursting strength or wooden box to house the instrument b Wrap the instrument in heavy paper or plastic before placing it in the shipping container c Use plenty of packing material around all sides of the instrument and protect the front panel with cardboard strips d Seal the package with strong tape or metal bands mark Delicate Instrument e Refer to the address list at the rear of this manual and check with your Hewlett Packard sales and service office for shipping instructions All cor respondence should refer to an instrument
123. n 11 on 4 circuit board connector with 4 moved To checkA3CR2 measure from the center of INPUT connector to pin 12 on 4 circuit board connector with A4 removed The diodes should have a front toback resistance ratio of 10K to in finity Duringtheabovetests be surethat thereare no other connections to the 52574 Replacement A3 SAMPLER part no for A3CR1 and A3CR2 is 1901 0617 and includes CR1 CR2 plus holder and resistor ina matched pair A4 circuits amplify the sampling diodes output Amplifier bandwidth is about 1 kHz to 4 MHz Also included on A4 are a 1 kHz oscillator and a 1 kHz filter which are part of the lock sensing circuit in the APC mode The front panel APC BAL control is set to give midscale meter reading in the APC mode with the VFO at 100 MHz LEVEL ADJ full cw and no in put signal Lock sensing can be checked by checking the dc voltage at A6 6 A voltage of 15 V indicates phase lock and Counter enabled 7V indicates no phase lock and Counter is disabled A4 outputwaveforms at pins 3 and shown be low as waveform no 7 4 kHz OSC SAMPLING DIODES INPUT CONNECTOR APC MODE ONLY ikHz FILTER TO TO 5 8 TO METER IN APC ONLY lock condition 3 V p p 1 kHz non sampling A4 AS VIEWED FROM COMPONENT SIDE If sampling there is small 20 mV signal here in no 5 V p p 1 kHz pin 3 is the same i Wavefo
124. nc San Gabriel Calif Mfg Co San Jose wedstet Electronics Co New York Sciotics Corp Northridge Calif Acjustable Bushing Co N Hollywood Calif Micron lectionics Garden City Long Island N Y inst Corr Lynbrook N Y Cabietiesics Costa Mesa Calif Taenueth Century Cor Spring Santa Clara Cahit Fenwat Elect inc Framingham Mass Ametco Inc HU View Sztuce Fine Mica Co Sotuce Pane Omni Spectra Inc Detroit 11 Computer Diode Coty Ledi loea Prec Meter Co Inc De Jus Meter Div Radio Div of G M Tnermonetics Inc Tianex Company Metal Products Angstronn Prec tas Rt ucGraw Edison Cc Power Design Pacte inc Cievne Corp Sericonducto Div Pale Alto Calit Sunnyvale Cait Ty Cet Mig Inc Holliston Mass TRA Elect Comp Dix Des Plaines 111 Curtis Instrument Inc Mi Kisco N Y E i DuPont and Cc Inc Wilmington Det Durant Co Milwaukee Wis The Bencia Corp Navigation Control Div Teterboro Thomas Edison incustnes Div of MeGiaw Edisen 7c West Orange N j Concoa Balawin Park Call LEC Horseneags N Y Electra ttg Co Independence Kansas Sem Tech Brooniyn N Y Koxoma Ind Canoga Park Calif Mountain View Calif Ahron Dhic Holiysood Manchester N h Palo Altz Caut Signetics Corp FSC Handdoc Supplements Hi Dated AUGUST 196 4 2 Dated
125. nce state of the preset divider this information is passed along to gate extender at A9 15 as a positive pulse 4 57 For example ifa coincidence outputis desired after four counts 004 is preset into thumbwheel switches S2 to set the dividers After four input pulses the divider reaches the full count and a coin cidence pulse results coincidence pulse is de siredafter 11 counts thethumbwheels are set to read Oll After one input pulse the first preset divider is its coincidence state but there is no coincidence pulse at this time because the second preset divider has a count preset into it and is out of coincidence The first preset divider must count 19 more pulses beforea pulse will be sent tothe second preset divider The 10th input pulse sends a carry pulse to the second preset divider and brings it to coincidence state The 11th pulse brings the first divider back to coincidence state and the output line to A9 goes high because all binary outputs are at coincidence This action generates the coincidence gating pulse in 9 gate extender assembly 4 8 Ye ayak EE Figure 4 5 Preset Divider A INTEGRATED CIRCUIT BINARY NC CP S2 tp Q GND LOW INPUT TO Sp SET Q TO LOGIC LOGICAL 5 MORE POSITIVE THAN LOGICAL O B EQUIVALENT BLOCK FOR BINARY 31s 016 4152 1 Sp Cp 1216 5 9 5 I LOCATION OF TERMINALS MOVED FOR C
126. need for an oscilloscope to detect zero beat such as needed for conventional transfer oscillators 1 5 Ajack on the front panel connected to the sam pler output circuitry permits use of the Model 5257A for down conversion to extend the range of low fre quency instruments and devices such as oscilloscopes FM discriminators etc Also an oscilloscope can be connected tothis jack for very precise observation of zero beat when measuring pulsed rf signals 1 6 Thumbwheel switches automatically perform harmonic computation for the counter by extending the counter s gate time by the factor N In this way the counter s readout is the actual input frequency At an N setting of 001 the counter either reads the VFO frequency or the VFO frequency divided by four inthe lowest range The VFO range of 66 7 to 133 3 MHz must be prescaled for the50 to 200 MHz input range N can be determined exactly and verified by simple procedures to be described later in this manual 1 7 SPECIFICATIONS 1 8 Table 1 1 contains all technical specifications for the Model 5257A when operated in HP Electronic Counters 1 9 IDENTIFICATION 1 10 Hewlett Packard uses a two section serial number mounted on the rear panel Earlier instru ments use an 8 digit serial number 000 00000 The first three digits are a serial prefix number the last five digits refer to the specific instrument Later instruments use a 9 digit serial number 0000400000 The fir
127. nted assembly consists of the assembly designation plus the designator number of the component in that assembly Components that are not part of any assembly chassis parts are identified by component numbers only For example 1 1 refers to resistor R1 in the VFO linearizer sub assembly A1 which is part of the VFO assembly 7 resistor numbered R1 mounted on the chassis is simply designated R1 4 13 Complete reference designators will be used in this manualonly when necessaryto avoid confusion with other components or assemblies having similar designators For a complete reference designator where an abbreviated one is used in the text add the designator for the assembly as given in the heading immediately preceding that paragraph 4 2 4 14 PULSE DRIVER A1 4 15 VFO buffer output from is applied io the input switching network consisting of CR1 CR2 and CRI When switch Sl is in the three highest ranges for frequencies from 200 MHz to 18 GHz a 15 volt bias is applied toturn CR2 off and CR1 and CR3 on so that the VFO signal drives transistor QI of the driver amplifier The prescaled divided by four VFO signal from prescaler A8 C is applied to switching diodes CR4 and CR5 In the three highest frequency ranges CR5 clamps the input to ground and CR4 is virtually an open circuit sothat the prescaled input is prevented from appearing at Q1 base When S1 is switched to the 50 to 200 MHz range the
128. ntington ind 93369 33821 Loyd Scruggs Co Festus Mo 93410 35942 Aeronautical inst 3 Regio Co Lodi N J 93929 84171 Arco Electronics Inc Great Neck N Y 94137 85396 A J Glesener Co Inc San Francisco Calif 94144 34411 TRW Capacitor Div Ogallala Neb 34970 Satkes Tatzian Inc Bloomingion Ind 94148 85454 Boonton Molding Company Boonton N J 3547 A B Boyd Co San Francisco Call 94154 35474 R M Bracamonte amp Cc San Francisco Calif 93197 35660 Koiled Kords Inc Hamden Conn 85911 Seamiess Rubber Co Chicago 94222 88197 Chilton Precision Products Co Inc 94330 Clifton Heights Pa 91682 56579 Precision Rubber Products Corp Dayton Ohio 6686 Radio Corp of America Electronic 34696 Comp amp Devices Div Harrison N J 95021 37034 Marco ladustues Anahe Calif 57216 Photo Corporation Lansdale Divisioni Lansdale 37473 Western Fiorous Glass Products Co San Francisco Calif 27664 Van Walers 8 Rogers Inc San Francisco Calif 87330 Tower Mig Corp Providence R 1 38140 Cutler Hammer inc Lincoln HI 35220 Covid Nalonal Batteries lac Paul Minn 55698 General Mills Inc Bulfalo N Y 39231 Graybar Co Oakland Calil 39473 Distributiag Coto Schenectady 9665 United Transformer Cc Chicago Hl 30179 US Rubber Co Consume Ind amp Plastics Prod Div Passaic N J 30970 Beamag Engineering Co San Francisco Cali 91146 ITT Cannon Elect inc Salem Div Sa
129. of 014 as the series regulating device 012 voltage feedback amplifier and CR combined with amplifier Q9 us a reference voltage The unregulated 20 volt input is dropped R28 Q14 and appears on the 13 volt output line Voltage divider R29 and R30 samples the output voltage ana applies 9 volts to the base of Q12 Zener diode CR holds the base of Q9 to 9 volts to set a fixed voltase for the emitters of Q9 and 012 If the output voltaue tends to rise over 13 volts the base bias on 912 creases 012 conduction increases and its collector drops in voltage This decreases the base bias thus conduction of 014 so that the output voltage un the 13 volt line decreases to remain constant For a decrease in output voltage the opposite action takes place C13 prevents transients in the load fron affecting regulator operation 4 31 10 VOLT REGULATOR Q16 is the series regulating device whose bias is controlled by QI5 Q11 and Q12 are a differential CR2 establishes a reference voltage at the base QUI and the voltage de Section IV Theory at the base of Q13 derived from voltage divider R32 and R33 across the 10 volt output must equal the reference Any change in output voltage tending to change this balance will be corrected by a change in bias on Q15 which changes the conduction of Q16 4 32 AUTOMATIC PHASE CONTROL ASSEMBLY 6 4 33 RANGE COMPENSATION loop compen sation for each of th
130. ohogawa Hewiett Packarc 110 Ohashi Building 59 Yoyogi 1 chrome Shibuya ku Tokyo Tel 03 370 2281 7 Telex 232 2024 Cable YHPMARKET TC i HEWLETT EUROPE Hewlett Packard Vertriebs CmbM AFRICA ASIA PACKARD NETHERLANDS Hewlett Packard Benelux Weerdestola 117 P 0 Box 7425 Amsterdam Z 11 Tel 020 42 77 77 Cable PALOGEN Amsterdam Telex 13 216 NORWAY Hewlett Packard Norge A S Box 149 Nesveien 13 N 1344 Neston Tei 2 53 83 60 Cable HEWPACK Oslo Telex 16621 PORTUGAL Telectra Empresa Tecnica de Equisamentos Electricos S a r i Rua Redrige da Fonseca 103 P O Bex 2531 Lisboa 1 Tel 63 60 72 Cable TELECTRA Lisbon Teter 1596 SPAIN Atsio Ingenieros SA Enrique Larreta 12 Madrid 15 Tel 215 35 43 Cable TELEATAIO Madrid Telex 272496 Ataio ingenieros SA Ganduxet 76 Barcelona 6 Tel 211 4466 Cable TELEATAIO BARCELONA AUSTRALIA Yokogawa Hewiett Packard Ltd Nisei ibaragi Bldg 2 2 8 Kasuga Ibaragi Shi Osaka Tel 23 1641 Telex 385 5332 YHPOSAKA Yohogawa Hewtett Packar Ltd ito Building No 59 Kotori cho Nakamura ku Nagoya City Tel 551 0215 Yohogawa Hewlett Packard Lte Nitto Bldg 2300 Shinohera cho Kohoku hu Yokohama 222 Vel 405 432 1504 5 KOREA American Trading Co Korea Ltd Seoui P O Sex 1103 7th amp floors DaeKyung Bidg 107 Sejong Ro Chongro Ku Seoul Tet 75 5841 4 lines Cable
131. onal Electronic Research Corp Burbank Calif Columbia Technical Corp New York N Y Vatian Associates Pato Alto Call Allee Cors Winchester Mass Marshal ind Capacilor Div Monrovia Calif Control Switch Division Controls Co of America El Segundo Calif Delevan Electronics Coro Wilco Corssiation Renbrane Inc Hoffman Electronics Carp Semitenductor Dis tosttume Fast Autora N Y Indianapolis ind Boston Mass El Monte Calif of Cant Hewbuty Park Calif 1001 THE FOLLOWING HP VENDORS HAVE NO NUMBER ASSIGNED IN THE LATEST SUPPLEMENT TO THE FEDERAL SUPPLY CODE 225 MANUFACTURERS AANOSOOK 15068 Wales Tro and Die Los Angeles Calif 12007 Wiltow Leatner Prozocts hewath 8 1 CAB ETA England 11988 Pretisior Insttume Components Van Noys Calif 21004 Hewlett Packard Cc Colorado Springs Colorado Springs Colorado 300MM Rubber Eng Deveropment Hayward Calif A UN D Cc San Jose Call 52000 Coaolltoz Oakland Calif 00088 Eastern Lar Burlington Cali TOY SK 5 11 Los Angeles Calif From FSC handbook Surciements Hai Dated AUGUST 1966 H4 2 Dated NOV 1962 SECTION VII MANUAL CHANGES 7 1 MANUAL CHANGES 7 2 Current Instruments 7 3 This manual applies directly to standard Model 5257A Transfer Oscillator having the following serial prefix number refer to Paragraph 1 10 976 7 4 Older Instrumen
132. pical System Sensitivity g 5 5 3 3 28 Inthe 05 2 GHz range sampling frequency fs is VFO frequency fy prescaled by four The counter reads this sampling frequency not the V FO frequency Therefore for direct calculation of N the estimated input signal frequency should be known to within the sampling frequency from 16 3 to 33 3 MHz Hence the procedure is the same as in Paragraph 3 27 The estimated input frequency fx is divided by the counter reading fg and the answer is N fx fg N where fs equals VFO frequency fy divided by 4 3 29 Briefly the frequency measurement procedure using direct calculation of is as follows set the thumbwheels at 001 Tune FREQUENCY MHz for an indication of zero beat or phase lock observing LEVEL ADJ and MODE switch positions described in Paragraph 3 4 Read sampling frequency on the counter Divide the sampling frequency into the esti mated frequency to obtain N slide rule accuracy is permissible Turn thumbwheels to N Read actual input frequency on counter s display 3 30 When input frequency fx is knownto be outside the limits for direct calculation of N stated in Para graphs 3 27and 3 28 a different procedure is followed The thumbwheels are set to 001 FREQUENCY MHz is tuned to zero beat or phase lock while observing LEVEL ADJ and MODE switch position described in Paragraph 3 4 and the counter readout 15 recorded as fj FREQ
133. r leakage current or 5 volts reverse bias 5 34 To prevent damage to diodes when working in the sampler circuits a Ground probes before making measurements b Avoid strong RF fields A cable attached to the INPUT connector or diodes may actas an antenna and pick up enough RF energy to damage the diodes c Avoid static discharges through the diodes Touch 5257A casing before touching diodes d To prevent leakage currents that might damage the diodes unplug soldering iron before working in this part on the circuit 5 35 Remove 4 from its connector to expose pins 11 and 12 These are the two leads on the connector closest to the front panel Remove 5257A from Counter and be sure no leads are connected to it Using an HP 412A on the 10K range measure from the center conductor of the IN PUT connector to pin 11 Reverse ohmmeter leads and repeat A ratio of infinity tu 10 is normal Perform the same test from pin 12 Pin 11 checks A3CR1 and Pin 12 checks A3CR2 5 36 Sensitivity Check 5 37 Reter to performance check Table 5 3 5 38 GEAR TRAIN CAUTION Gear train alignment is critical Individua gear replacement or adjustment is not recom mended The zear train should be replacec asa complete unit HP Part No 05257 60019 5 39 Removal Remove fine adj FREQUENCY knob anc i retainer ring behind it b Remove screws holding side brackets to trum panel c Remove thetwo screws holding the side
134. r of characters in one tube is limited to about 12 The advantages of this type of indicator are 1 The characters are well shaped 2 The characters are bright and can be large Tubes with characters up to 3 in high are available http www decodesystems com nixie html 1 of 7 9 03 2007 11 28 29 Nixie Displays 150V YY WWW 2 10 TO SIMILAR DRIVE CIRCUITS Fig 16 9 Multi cathode indicator drive circuit shaped cathode e 7441 Early BCD Nixie driver DUAL IN LINE PACKAGE VIEW 9801546732 BCD TO DEC IMAL DECODER DRIVER vcc IC 26 21 28 29 30 31 SN74418 THESE ARE THE DISPLAY TUBE NUMBERS WHICH WILL BE TURNED ON BY THE 10 DECODER DRIVER OUTPUTS THE ACTIVATED OUTPUT WILL BE LOW AND THE OTHER NINE OUTPUTS HIGH FOR EXAMPLE IF THE NUMBER 7 15 ILLUM INATED IN THE DISPLAY TUBE PIN 10 OF THE DECODER DRIVER WILL BE LOW AND THE OTHER NINE OUTPUT PINS WILL BE HIGH LOG IC LEVEL VOLTAGES INPUT HIGH INPUT LOW OUTPUT HIGH This part was also sold by Radio Shack as catalog number 276 1804 74141 BCD Nixie driver e ST Signetics Nixie Driver Click here for the datasheet Electronics hobby magazines from the 1960 s nr and 1970 s occasionally ran articles on Nixie s Tw 85971 7 2 tubes and other cold cathode display devices 51 I ve begun to scan the articles from old 41 magazines and make them available Click he
135. range is 66 7 to 133 3 MHz and is a signal from has no effect 2 The lin earizer is enabled in the APC mode and holds the VFO level over the tuning range by inserting R8 the signal displayed by the Counter after prescaler 8 In the APC mode input is from 6 In the PRF mode pin E is grounded and 15 V is applied through R17 into the loop At 133 3 MHz all the resistors are used The VFO control ATA2 uses two reverse biased and CR2 The capacitance is inversely proportional to the bias an increase in bias decreases the capacitance to pin B which sets point 9 at approximately 8 V as measured with an HP 412A Inthe PRF mode TO J3 P FROM 6 8 TO J3 R 2 5 V p pQ 1 kHz PRF mode measure approx 8 V on HP 412A p p Q 1 kHz Waveforms taken with an HP 180A 1801A Vertical Amplifier and a 10004A 10 to 1 Divider Prot Th 5257A in APC mode with no fx input VFO at 70 MHz 05 to 2 GHz range LEVEL fully CW x 001 and sampling Waveform 9 note indicates dc volts for PRF mode 8 12 TOR 13 Section VIII Circuit Diagrams A8 see block diagram below converts the input signal into square waves of relatively constant amplitude at exactly 1 4 of the input frequency That constant amplitude square wave is the coun ted signal The other output is applied to the A1 pulse driver in the 05 to 2 GHz range only R8 should be adjusted for a stable count at
136. re to view an index to several construction projects from the magazine Radio e S Electronics 82 THRQUS 514 8 KE Be KID 19 K gt n K9 i 1 Ki Fiz 2 nali poter arty on cente colline 13 KT through IF wvitehes Abant 150 patty de en the noce 14 KE In 1969 Signetics published an application memo entitled Multiplex Operation Of Nixie Tubes Using Signetics Complex Arrays and Nixie Driver It describes an approach to minimizing parts count by using shift registers and Nixie drivers to multiplex a set of Nixie tubes You can read the note by clicking here http www decodesystems com nixie html 2 of 7 9 03 2007 11 28 29 Nixie Displays Yes it s true you used to be able to purchase nixie tubes at your local Radio Shack I ve got a few of these tubes in their original packaging From the data sheet The Radio Shack 276 048 is a cold cathode side viewing numerical indicator tube It displays the numerals 0 through 9 and has two internal independently operable decimal points located to the left and right of the numeral The desired numeral is lit when its corresponding cathode is energized The color of the display 15 neon red brightness of the numerical indicator is dependent upon cathode current and the horizontal viewing angle is 100 degrees Click here to see a scan of the datasheet BURROUGHS 4998 One of the smallest Nixie tubes is the Burrough
137. reads 9 10 with 4 dBm input Deviation less than 2 kHz in 3 minutes Date Counter reads 100 MHz OK Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 9 10 with 7 dBm input Meter reads 5 10 with 5 us pulse Meter reads 9 10 with 4 dBm input Meter reads 9 10 with 4 dBm input Deviation less than 2 kHz in 3 minutes OOOO Table 5 3 In Cabinet Performance Check Cont d 50 MHz CHECK Cont d Adjust 5257A FREQUENCY for maximum meter deflection with Counter reading close to 16 7 MHz Adjust Signal Generator output for 9 10 full scale on 5257A meter RF Millivoltmeter should read 7 dBm or less Set 5257A MODE to APC and adjust FREQUENCY for phase lock observe zero beat on Oscilioscope 200 MHz CHECK Set Signal Generator to 200 MHz at 50 dBm Adjust 5257A LEVEL ADJ for 0 35 V peak to peak on Oscilloscope 3 Set 5257 MODE to PULSED RF and increase Signal Generator output to 25 dBm 4 Adjust 5257 FREQUENCY for maximum meter deflection with Counter reading close to 33 3 MHz Adjust Signal Generator output for 9 10 full scale on 5257A meter RF Millivoltmeter shouid read 7 dBm or less Set 5257A MODE to APC and adjust FREQUENCY for phase lock observe zero beat on Oscilloscope 1 GHz CHECK Remove RF Millivol
138. rms taken with HP 180A 1801A Vertical Amplifier and a 10004A 10 to 1 Divider Probe The 52574 in APC mode with no fx input VFO at 70 MHz 05 to 2 GHz range LEVEL fully CW N 001 sampling Section Circuit Diagrams 11 assembly is located at the rear of the 5257A above the plug in connector It filters and feeds power supply voltages from Counter to the 5257A regulators Check this assembly for burned coils AS assembly regulates power supply voltages The 13 and 10 V can be 5 V These levels COUNTER PLUG IN All ASSY CONNECTOR EN HOLDING 03 04 05 5V p p 1kHz sampling ARA ANAK AR AER 5 5V p p 1 kHz not sampling can affect adjustment of A4R10 Q10 is amplifier for isolation of pulses appearing at the Pulsed RF Out jack The signal that appears at Q1 Q2 is converted by peak holding circuits so that the meter acts as a zero beat detector in the RF mode The meter is not connected to this cir cuit in the APC mode AS 13V R 09 012 014 ES AS 011 013 015 TO PULSED RF JACK FRONT PANEL Q A 15 0 08 RF MODE ONLY PIN 1 20V EPS PIN 5 10 8 10 15 1111 N 54 5V 1kHz A4 6 or 3 Waveforms taken with HP 180A 1801A VerticalAmplifier anda 10004A 10 to 1 Divider Probe The 5257A in APC mode with no fx input VFO at 70 MHz 05 to 2 GHz range LEVE
139. rs the display is a frequency count In the PULSED RF mode the counter reads frequency continually 3 8 The PULSED RF mode of operation is available for frequency measurement of signals which cannot be phase locked These include pulsed rf signals as well as very heavily frequency modulated carriers Typical fm performance curves for the Model 5257 are shown in Figure 3 2 Signals with modulation in the areaabovethe curves usually requirethe PULSED RF mode while those falling below the curve can be measured in the APC mode 3 9 With pulsed rf input signals the minimum error in frequency measurement is dependent upon the pulse width due to imperfect zero beat The Model 5257A has a typical error of 0 01 cycle per pulse width Pulse width versus error is shown in Figure 3 3 For example with a 1 us pulse cycles error pulse width 10 2 1 10 6 104 cycles or 10 kHz error For a 10 GHz carrier this becomes 104 Hz error 1010 Figure 3 1 APC Lock Range LOCK RANGE OF INPUT FREQUENCY 1 3 x x 8 I FREQUENCY fx GHz Section III Operation Hz carrier 1 x 10 error in measurement at this frequency Operation of the 5257A is specified for a minimum pulse width of 0 5 usec Therefore absolute error in measurement can always be less than 20 kHz 3 10 The front panel jack labeled PULSED RF OUT is useful for down conversionapplications of the Model 5257A as
140. s 4 49 One half cycle ofa period after the end of hold off period P signal goes low at CP and Q output goes low Immediately output of 4 goes high Two half cycles of the input signal later output Q of again changes state and goes high Thus it divides the input pulse frequency by two to give a period of 2P Output Q of IC4 remains high and does not change state until the 2P input from IC1 CP clock pulse goes negative one half cycle later Thus IC4 divides its 2P input bytwofor a total division of four The new time interval at the Q output of IC4 is 4P where P is the input time interval from the counter at P6 48 4 50 and IC2D perform control logie for start and stop gates Q9 and Q10 Initially their conduction is low due to positive levels from IC3C and IC2D respectively Hold off see Paragraph 4 49 enabled through IC3A with inversion by Figure 4 3 1C Logic Gate POSITIVE LOGIC 8 79 10 IF 2713 Thus the leading edge of new period from 4 0 appears at IC3C 9 and IC3C 8 abruptiy goes low This generates a sharp negative pulse output from 09 to 21 and the counter start circuit The signal also goes to IC2D 10 but IC2D 9 is low so there is no change in IC2D 8 At the end of count time de termined by preset decade A10 a coincidence pulse appears at IC2D 9 and inverter IC3D 12 IC2D is enabled so that when
141. s B4998 a top view design I have a display module from an old piece of test equipment that has six of these display tubes NIXIE TUBE ASSEMBLY I have four of these Nixie tube assemblies but I don t have any documentation on the pinouts or even what equipment these were designed for Any help would be appreciated 1 ANOTHER TUBE ASSEMBLY I have one of these Nixie tube assemblies and I m looking for the pin outs for the BIPCO 8806 3 Nixie driver decoders it uses You can see more photos and information by clicking here HEWLETT PACKARD HP NIXIE MODULE I have a handful of these HP Nixie boards part number 05212 6016 Series 648 They have a very interesting decoder design using neon lamps hidden under the black lid just behind the Nixie tube This is description of the design from Tony Duell HP made a decade counter display board where the counter flip flops were made from pairs of transistors in the conventional way 8 transistors on the board These were controlled with diodes to count in 1242 not 1248 BCD code The outputs of these counters drove 8 neon bulbs http www decodesystems com nixie html 3 of 7 9 03 2007 11 28 29 Nixie Displays and by varying the bias applied the state of the counter could be latched in the bulbs that s why this L Is relevant here These bulbs were mounted inside a plastic block on the PCB and shone onto a thick flim circuit
142. se whenthe output voltage is 4 volts Q2 and Q3 form a differential amplifier which controls the voltage on Q5 base to a level that satisfies these conditions Changes inoutput load which would change the 4 volts are cancelled out by corresponding increase or decrease in conduc tance of Q3 whichadjuststhe bias of Q5 This changes the series resistance of the circuit to provide voltage regulation 4 54 PRESET DECADE ASSEMBLY A10 4 55 Figure 4 5 shows block diagrams for the IC s and an IC decade The dividers are preset by the thumbwheel N switch shown in Figure 4 4 This decade divider is an arrangement of four binary in tegrated circuit IC flip flops which give an output pulsefor every ten input pulses During its operation a decade divider would ordinarily pass through ten different operating states 10 preset divider is a modified decade divider whichis preset by thumbwheel switches to give a coincident output when it reaches a selected number The dividerlogic states ofa decade for the thumbwheel settings are shown in Table 4 Figure 4 4 N Switch Diagram N SWITCH PRESET DIVIDER Section IV Theory OUTPUT 10 NEXT PRESET DIVIDER OUTPUT 10 GATE CONTROL L PRESET DIVIDEP Section Theory Table 4 1 Truth Table 4 56 The logic states of the divider flip flops are sensed by the diode the Q or output lines of the binaries When all the diodes reach the same poten tial or coincide
143. st four digits are the serial prefix and the last five digits refer to the specific instrument 1 11 If the serial prefix of your instrument differs from that listed on the title page of this manual there are differences between this manual and your instru ment Lower serial prefixes are documented in Sec tion VII and higher serial prefixes are covered with manual change sheets included with the manual If the change sheet is missing contact the nearest Hewlett Packard Sales and Service Office listed on the inside rear cover of this manual 1 12 COOLING 1 13 The Model 5257A is cooled by the ventilation system of the counter in which it is installed See counter service manual for cooling system mainten ance instructions 1 1 Section General Table 1 1 FREQUENCY RANGE 50 MHz to 18 GHz INPUT SIGNAL CAPACITY CW signals Pulsed RF signals Signals with high FM content CW MEASUREMENT ACCURACY Retains Counter accuracy INPUT SENSITIVITY 100 mV rms 7 dBm for input frequencies of 50 MHz to 15 GHz 140 mV rms 4 dBm for input frequencies of 15 to 18 GHz and VFO frequency of 125 to 133 MHz INPUT IMPEDANCE 50 ohms nominal MAXIMUM INPUT 10 dBm for CW signals 2 V peak to peak for pulsed RF signals APC LOCK RANGE Approximately 0 2 of input frequency METER APC Mode indicates loop phase error under locked conditions Pulsed RF Mode zero beat indicator PULSED RF OUT For external osci
144. t be used to determine shorted stripline Do not attempt any repairs on A2 other than replacing CR1 Do not unsolder C1 at A2 always unsolder at Al The contact under A2CRI is cut to fit A shorted stripline is usually caused by a fine wire coming through the hole on theboard and touchingthe ground plane on the bottom causing a non sampling condition 2 PULSE GENERATOR DRIVER AMPLIFIER TO A3 SAMPLER 1 6 e 17 MHz collector of Q6 to grd 2 89 70 MHz 5 V p p 17 MHz 05 2 GHz range Wavetorms taken with HP 180A 1801A Vertical Amplifier und a 10004A 10 to 1 Divider Probe The 5257A is in APC mode with no fx input VFO at 70 MHz sampling Waveform notes indicate exceptions to thes 8 4 Sto 2 GHz range LEVEL fully CW N 001 and conditions Section Circuit Diagrams A3 contains the sampling diodes which receive their input from the attenuator INPUT signal and the stripline pulse generator A2 A3 output is a low level signal that is the difference between the VFO and the sampled INPUT signal To check resistance at INPUT connector measure from center of INPUT connector to ground with an HP 412A Resistance should be 509 22 If re sistance is not within this range factory repair will be necessary Sampling diodes A3CR1 and A3CR2 may be checked with an HP 412A onthe 10K range TocheckA3CR1 measure from the center of INPUT connector to pi
145. temr Ir 3 arnei d wo Pa posi 6 az i T wt dra Medium Large Medium Large HEWLETT PACKARD HP 3430A DIGITAL VOLTMETER Quantity three I ve scanned parts of the Operating and Service Manual Calibration e Calibration section page 1 Calibration section page 2 e Calibration section page 3 e Calibration section page 4 Troubleshooting e Troubleshooting Tree e Maintenance section page 1 e Maintenance section page 2 e Maintenance section page 3 e Maintenance section page 4 e Maintenance section page 5 Diagrams e Wiring Diagram e Location of Chassis Mounted Components e Board Component Layout Schematics These images are in PCX format The original schematics come as fold outs in the service manual and are too large for my flatbed scanner Each page has been scanned as two parts a left side and a right side Al Page 1 Left Side Al Page 1 Right Side Al Page 2 Left Side e Al Page 2 Right Side Parts List e Al parts list page 1 e Al parts list page 2 e Al parts list page 3 HEWLETT PACKARD 5245L COUNTER http www decodesystems com nixie html 6 of 7 9 03 2007 11 28 29 Nixie Displays Quantity one With 5252A Prescaler and 5265A Digital Voltmeter plug ins HEWLETT PACKARD 5246L COUNTER Quantity one With 5253B Frequency Converter plug in HEWLETT PACKARD 5326 TIMER COUNTER DVM Quantity one HEWLETT
146. th the VFO at 100 MHz LEVEL full cw and no input signal Change A4 APC NO 1 block diagram to indicate potentiometer referenced as R2 APC BAL is now A4R10 Page 8 7 Figure 8 4 A3 A4 schematics Replace schematic with Figure 7 2 Delete A4 component locator re place with Figure 7 3 Page 8 9 Delete 11 component locator photo replace with Figure 7 4 Page 8 13 Figure 8 7 schematic Change value of C9 from 1 5 tol CHANGE 5 Page 6 11 12 13 Table 6 1 0976 Change 8 05257 60039 to 05257 60013 m Change A8 05257 20039 to 05257 20013 Replace A8 components with those listed in Table 7 1 Page 8 15 Figure 8 8 Replace A8 Component locator with Figure 7 5 Replace A8 Schematic 05257 60039 with Figure 7 6 M 0 gt au os na gt d TOP RIGHT SIDE Top Bottom and Side Internal Views Figure 7 1 AB PRESCALER AND INHIBIT ASSEMBLY 0523 11 SEWES b20 _ 03 1520075 0019 Qa PITE AMI HE 1 2 NOTES com run 16 DIS RETI MUSEI Landi ON QS PCO ACE wC RONI NRI ATMS 100 DIVER amm Bany Dm rm 018 2 3 04 INAT
147. the 05 2 GHz rangethe counted signal will be 1 4 the FREQUENCY dial reading On all other ranges the counter signalisthe FRE QUENCY dial reading if the thumbwheel switches are set to 001 A10 extends the Counter gate time by any desired integer up to 227 Note that integers up to 399 can be set but are not used for practical measurements The thumbwheel switches on the front panel are used to dial the integer by which the Counter gate time is multiplied These switches can be checked independently from the rest of the instrument by performing gate extender check in Paragraph 5 17 The FO section must operating for the complete test but if the gate light is cycling it is a good in dication of proper operation of A9 and A10 FROM COUNTER 12 P6 48 PERIOD FROM COUNTER P6 44 RESET 15 COINCIDENCE HUNDREDS A9 GATE TIME EXTENDER THUMBWHEEL SWITCHES A9 AS VIEWED FROM COMPONENT SIDE o GATE ENABLE P6 2 GATE INHIBIT P6 23 HOLO OFF P6 43 SEE TEXT 1333 LL gt START 6 21 STOP 22 14 RESET PERIOD N OR 4N UUUUUUUUUUULUU and sampling Counter TIME BASE 1 ms Waveforms taken with an HP 180A 1801A Vertical Amplifier and a 10004A 10 to 1 Divider Probe 5257 in mode with fx input VFO at 70 MHz The 05 to 2 GHz range LEVEL fully CW N 001 9 AS VIEWED FROM COMPO
148. the 18 GHz input sampler Use caution especially for pulsed signals where peak voltages may be quite high even at low power When in doubt use an attenuator and decrease attenuation until the Model 5257A responds to the signal 3 6 IntheAPC Mode signal may be phase locked by tuning the FREQUENCY MHz control through any subharmonic of the input frequency The meter reads the phase lock error voltage near mid scale deflec tion Mid scale deflection representing 0 phase error may drift slightly due to the dc amplifier circuitry This does not affect instrument accuracy The de flection for 0 phase error may be checked by observing the meter while tuned between adjacent phase lock frequencies Deflection for zero error may be adjusted to mid scale with the APC adjustment potentiometer reached through a hole inthe top cover See Page 5 4 for APC adjustment After phase lock FREQUENCY MHz should be adjusted until the meter reads the 0 error deflection previously determined Once the signal has been captured or phase locked the VFO frequency will be independent of movement of the FREQUENCY MHz control corresponding to a lock of approximately 0 2 of the input frequency APC lock range versus input frequency is shown in Figure 3 1 3 7 Counter display is controlled by an inhibit gate operated from the Model 5257A phase lock loop the APC Mode when phase lock is not present the counter display is all zeros When phase lock occu
149. tmeter and coaxial adapters used in the preceeding steps and connect Signal Generator directly to 5257A INPUT Set Signal Generator output to 1 GHz at 25 dBm Set 5257A RANGE to 2 1 GHz and adjust LEVEL ADJ for 0 35 V peak to peak on Oscilloscope Set 5257A MODE to PULSED RF and adjust FREQUENCY for maximum deflection with Counter reading close to 71 5 MHz Adjust Signal Generator output for 9 10 full scale on 5257A meter 6 Signal Generator output should be 7 dBm or less 7 Set 5257A MODE to and adjust FREQUENCY for phase lock observe zero beat on Oscilloscope 4 GHz CHECK Set Signal Generator output to 4 GHz at 25 dBm Set 5257 RANGE to 1 4 GHz and adjust LEVEL ADJ for 0 35 V peak to peak on Oscilloscope Set 5257 MODE to PULSED RF and adjust FREQUENCY tor maximum meter deflection with Counter reading close to 70 MHz Section Maintenance and Troubleshooting Table 5 3 In Cabinet Performance Check Cont d 4 GHz CHECK Cont d 4 Adjust Signal Generator output for 9 10 full scale on 525 77A meter 9 Signal Generator output should be 7 dBm or less 6 Set 5257A MODE to APC and adjust FREQUENCY for phase lock observe zero beat on Oscilloscope 8 GHz CHECK Set Signal Generator to 8 GHz at 25 dBm Set 52574 RANGE to 4 18 GHz and adjust LEVEL ADJ for 0 35 V peak to peak on Oscilloscope Set 52574 MODE to PULSED RF and adjust FREQUENCY for
150. ts 7 5 Backdating information to cover older instru ments is included in this section Instrument serial prefix numbers are shown under the CHANGE number heading the changes required to adapt this manual to those instruments 7 6 Newer Instruments 1 7 Aschangesare made the Model 5257A newer instruments may have serial prefix numbers not listed in this manual The manuals for these instruments will be supplied with an additional Manual Changes sheet containing the required information contact your nearest Hewlett Packard sales and service office for information if this sheet is missing CHANGE 1 Page 6 16 Table 6 1 804 Change MP12 part number from 0370 0472 to 0370 0102 Page 6 17 Table 6 2 Change 0370 0472 to 0370 0102 CHANGE 2 Page 8 5 Figure 8 3 Al schematic 820 Make the following changes A1R19 to 680 ohms A1Q3 to 2N3933 A1Q4 to 2N2857 delete series 4820 Page 6 3 Table 6 1 Change AiR19 to 0757 0920 R FXD MET FLM 680 OHM 2 1 4W Change A1Q3 to 1854 0238 TRANSIS TOR SIL NPN 2N3933 Change A1Q4 to HP Part No 1854 0048 Page 8 15 Figure 8 8 A8 schematic Make the following changes A8C4 to 82 PF Add A8C8 0 01 UF connected Q3 emitter to ground Change A8C3 5 and 10 to 1000 PF Change 8 5 to 30 ohms Remove asterisk from A8R12 Change A8R14 18 25 and 29 to 910 ohms CHANGE 3 848 Section VII Manual Changes Change A8R16 20 27 and 31 to 1100 ohms Change 801 7 and
151. y applicable notes lists parts in alpha numerical order of their HP part number and provides the following information on each part a Description of the part see list of abbreviations below c Manufacturer s part number d Totalquantity used inthe instrument TQ column kW H H H H d GL GRD 01194 13 assembly motor battery capacitor coupler diode delay line device signaling lamp misc electronic part A gras ER amperes automatic frequency control amplifier beat frequency oscillator beryllium copper binder head bamipass brass hackward 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 filliater head fixed giga 109 Wo MH n h k x WoW HM i M H own nn u Ud NM h H H W on W H go HH HN N H Table 6 2 6 5 6 4 ORDERING INFORMATION To obtain replacement parts address order or inquiry to your local Hewlett Packard Sales and Service office see lists atrear of this manual for addresses Identify parts by their Hewlett Packard part numbers a Instrument model number b Typical manufacturer of the part in a five digit code see list of manufacturers in Table 6 3 b Instrument serial number Des

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