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HP 5253B User's Manual

1. Stock No Description Mfr Part No 0683 7525 R FxO COMP 7500 OHMS 5 1 4W 01121 7525 1 0683 8205 RtFXD COMP 82 OHMS 5 1 w 01121 8205 1 0684 1041 RIFXD 00 K OHM 10 1 4 W 01121 cB 1041 1 0684 1511 RIFXD COMP 15K OHMS 10 1 5W 01121 CB 1231 1 0684 2701 RIFXD 27 OHM 10 1 8 W 01121 CB 2701 1 0684 5621 R FXD COMP 5 6 OHM 10 1 4W 01121 5621 2 0686 2425 RIFXD COMP 2400 OHM 5 172W 011211 2425 1 1120 0140 METER20 1 MILLIAMPERE EDGE VIEW 28480 1120 0140 1 1250 0102 CONNECTOR IBNC 91737 7011 1 1251 0099 CONNECTORt5O PIN MINAT 28480 1251 0099 1 1251 0135 CONNECTORIPRINTED CIRCUIT 15 CONTACTS 95554 50 61508 1 1850 0091 TRANSISTORIGERMANIUM 2 2048 PNP 87216 2N2048 4 1853 0009 TRANSISTOR ISILICON PNP 28480 1853 0009 2 1854 0005 TRANSISTOR 2N708 NPN SILICON 07263 2N708 4 1900 0011 SEMICON DEVICE SDIODE 1N4168M MATCH PAIR 95532 1 4168 1 1901 0040 DIODE SILICON 28480 1901 0040 3 1910 0016 DIODE GERMANIUM 100MA ATO4 85V 60PIV 28480 1910 0016 1 1910 0022 SEMICON DEVICE DIODE GE 100MA 6PIV 3 5NS 28480 1910 0022 3 9140 0025 COIL3FXD RF 4 7 UHY 28480 9140 0025 1 9180 0107 COILIFXD RF 27 UH 99800 1840 38 1 9140 0111 COIL FxD RF 3 3UHY 28480 9140 0111 1 9140 0118 COIL FXD 500 UH 5 99800 2500 14 2 9140 0125 COIL VAR 0 9 1 9 UH 28480 9140 0125 2 9140 0126 1 76 4 02 28480 9140 0126 2 9140 0137 COIL FXD RF LOOOUH 28480 9140 0137 1 9140 0138 COILIFXD RF 180UH 5 99800 9140 0133 1 9140 0142 C
2. um INSTRUMENT REPAIR FREQUENCY CONVERTER OPERATING AND SERVICE MANUAL HEWLETT PACKARD fp MANUAL CHANGES MODEL 5253B FREQUENCY CONVERTER Manual Serial Prefixed 513 Manual Printed NOV 1965 MAKE ALL CORRECTIONS IN THIS MANUAL ACCORDING TO ERRATA THEN CHECK THE FOLLOWING TABLE FOR YOUR INSTRUMENT SERIAL PREFIX S DIGITS OR SERIAL NUMBER 8 DIGITS AND MAKE ANY LISTED CHANGFISH IN THE MANUAL NEW ITEM SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES Replace Page 3 1 with new Page 3 1 Dec 27 65 Supplement A for 05253 9006 Model 5253B Section Paragraphs 3 1 to 3 13 SECTION IH OPERATION 3 1 FRONT PANEL 3 2 The functions of the front panel control meter connector and retaining screws are given in Figure 3 1 I 3 3 MAXIMUM INPUT VOLTAGES 3 4 Damage to the converter may result if an AC signal greater than 2 v RMS or a DC voltage greater than 100 v is applied to converter INPUT connector 3 5 OPERATING PROCEDURES 3 6 NORMAL RANGE MEASUREMENTS 3 7 Figure 3 2 is the procedure to be used for measurement of frequencies from 50 1 to 512 Mc with INPUT signalamplitudes from 50 mv to 1v RMS 3 8 EXTENDED RANGE MEASUREMENTS 3 9 The frequency of signals not within the normal range of 50 1 to 512 50 mv to 1v RMS may be measured using the following procedures 3 10 5
3. 5 3 5 18 Meter Replacement Procedure 5 3 5 20 Harmonic Generator Adjustment 5 4 5 22 Low Pass Filter Adjustment 5 4 5 25 Mechanical Adjustment of Meter Zer A 5 5 5 28 Sensitivity Check e e 5 5 5 29 Meter Accuracy Check 5 5 5 30 Low Pass Filter Check 5 5 5 31 In Cabinet Performance Check 5 6 VI REPLACEABLE PARTS 6 1 6 1 6 1 6 4 Ordering Information 6 1 APPENDIX II Model 5353A IIA 1 Introduction 2 2222 2200 1 3 1 TIA 7 Operating Procedure HA 1 8 Normal Range Measurements 1 10 Extended Range Measurements 1 IIA 14 Video Amplifier Assembly A1 HA 3 16 Level Indicator Meter HA 3 18 Harmonic Generator Adjustment 3 20 Low Pass Filter Adjustment IIA 3 IIA 22 Meter Adjustment HA 3 HA 23 Mechanical Adjustment of Meter Zero HA 5 HA 26 Sensitivity Check HA 5 HA 27 Meter Accuracy Check 5 HA 28 Low Pass Filter Check 5 IIA 29 In Cabinet Performance Check Yan Dates aa 6 01874 1 HP 5253 Frequency Converter max Model 5253B Table of Contents List of Illustrations and Tables LIST OF ILLUSTRATIONS Figure Page 1 1 Model 52553 1 0 3 1 Front Panel 4 4 64 9X XA Ex 3 0 3 2 Frequency Mea
4. 2 Troubleshooting Procedure 3 Reference Designation Index HA 4 Replaceable 9 s s HP 5253 Frequency Converter max iii Section I Model 5253B Figure 1 1 5253B frequency converter i egi cable Figure 1 1 Model 5253B and Accessory 01874 3 HP 5253 Frequency Converter max Model 5253B Section I Paragraphs 1 1 to 1 12 SECTION I GENERAL 1 1 DESCRIPTION 1 2 The Hewlett Packard Model 5253B Frequency Converter is a plug in unitwhich converts a Hewlett Packard Model 5243L or 52451 Electronic Counter into a direct reading counter from 50 to 512 Mc 1 3 The stability and accuracy of the basic counter are retained by multiplying 10 Mc signal derived from the 1 Mc internal time base of the counter to a selectable harmonic frequency between 50 and 500 Mc This known harmonic of 10 Mc is then hetero dyned with the INPUT signal If the resulting differ ence frequency is between 100 kc and 12 Mc bandwidth of amplifier in plug in it is counted anddisplayed by the counter The frequency of the INPUT signal is then indicated by the combination of the MIXING FREQUENCY control in megacyles front panel of plug in and the digital display of the counter in megacycles 1 4 A front panel meter by monitoring the differ ence frequency output of the plug in to the counter aids in selecting the desired MIXING FREQUENCY and also in determining
5. 00007 000 00048 000A C 00088 000MM OOONN 000QQ 00035 DDOWW 000 S K Smith Co Winchester Electronics Inc Santa Monica Calif Malco Tool and Die Los Angeles Calif Western Coil Div of Automatic ind Inc Redwood City Calif Ty Car Mfg Co Inc Holliston Mass Willow Leather Products Corp Newark N J British Radio Electronics Ltd Washington D C ETA England Indiana General Corp Elect Div Indiana Precision Instrument Components Co Yan Nuys Calif Hayward Calif San Jose 27 Calif Oakland Calif Burbank Calif Burlingame Calif Los Angeles 45 Calif Rubber Eng amp Development A CN D Manufacturing Co Cooltron Control of Elgin Watch Co California Eastern Lab From FSC Handbook Supplements H4 l Dated DECEMBER 1964 H4 2 Dated MARCH 1962 01874 1 Model 5253B Appendix APPENDIX I MANUAL CHANGES This manual applies directly to the 5253B Frequency Converter having serial prefix 513 This manual with the following changes also applies to the 5253B Frequency Converters having serial prefix numbers 450 321 and 311 Instrument Serial Prefix No Change No 450 1 311 321 1 2 CHANGE 1 Tables 6 1 Misc Table 6 2 Change Plate Bottom from 05253 0005 to Part No 5253A 12E Bracket Meter from 05251 0002 to Part No 5253A 12F Bracket Panel from 05253 0006 to Part No 05253 0002 Panel Front from 05253 2014 to Part No 05253 2003 CHANGE 2 Figure 5 5 Table
6. 100 mv If reading is above 100 mv troubleshoot video amplifier assembly Table 5 4 Adjustments after Repair AFTER REPLACING COMPONENT IN THIS SECTION Harmonic generator A3 Mixer A4 101 A1Q2 Low Pass Filter A1Q3 A1Q4 Meter circuit 5 4 PERFORM Harmonic generator adjustment Paragraph 5 20 Sensitivity check Paragraph 5 28 Sensitivity check Paragraph 5 28 Sensitivity check Paragraph 5 28 and Low pass filter adjustment Paragraph 5 22 Sensitivity check Paragraph 5 28 and Low pass filter adjustment Paragraph 5 22 Sensitivity check Paragraph 5 28 and Low pass filter adjustment Paragraph 5 22 Sensitivity check Paragraph 5 28 and Low pass filter adjustment Paragraph 5 22 Meter accuracy check Paragraph 5 29 01874 3 HP 5253 Frequency Converter max Model 5253B 5 24 METER CALIBRATION ADJUSTMENT pri a Turn counter power off remove converter from counter and reconnect to counter with Extension Cable 10506A b Set VHF Signal Generator to 102 Mc CW at 50 mv and connect to INPUT of converter c Set counter controls as shown in Figure 3 2 Counter should display approximately 2 Mc d Vary VHF Generator output to make level indi cator meter read at red green border e Using RF Millivoltmeter measure voltage at Test Point 12 Voltage should be between 100 mv and 130 mv If not change value of resistor AIR19 to change voltage to between 100 mv
7. ASSY MIXER ASSY STEP RECOVERY DIODE 28480 28480 28480 28480 00853 04062 04062 04062 04062 2252A 65A 2255 65 5253A 65C 5255 95 0150 0016 M100 E10 15 8216 DM15F 1016 300V DM2OF 58256 15 560J 300V 15 820 300V DM15F 391J 300V DM15E 200J 500V DM15E 4704 TYPE E TA 5C50A 2013 5C10 192 47392 602 1500475X9035B2 1025 CB 1225 CB 2205 2225 CB 2245 CB 2715 CB 5505 5615 5915 CB 4725 CB 5115 cB 5625 CB 6205 6815 CB 7525 CB 8205 CB 1041 CB 1511 CB 2701 CB 5621 EB 2425 1250 0102 57 10500 SD 615UR 282048 1NA168M 1901 0040 1910 0016 9140 0025 9140 0107 9140 0111 2500 14 9140 0125 9140 0126 9140 0142 396T125 102 See list of abbreviations in introduction to this section HP 5253 Frequency Converter max Model 5253B INO EL ES ALIS BRR eH FORE 01874 1 HEWLETT PACKARD SALES AND SERVICE OFFICES in the United States and Canada ALABAMA Huntsville 35802 2003 Byrd Spring Rd S W 205 881 4591 TWX 510 579 2204 ALASKA Bellevue Wash 98004 11656 N E 8th Street 206 454 3971 TWX 910 443 2303 ARIZONA Scottsdale 85251 3009 No Scottsdale Rd 602 945 7601 TWX 602 949 0111 Tucson 85716 232 So Tucson Blvd 602 623
8. Inductor A4L1 reduces the amplitude of any signal with a frequency above approximately 15 Mc before the signal reaches the input to the video amplifier The output of the mixer circuit is then essentially composed of the difference frequency signal Model 5253B 4 9 VIDEO AMPLIFIER ASSEMBLY Al 4 10 The output of the mixer circuit is amplified by transistors A1Q1 and A1Q2 and is fed to the 12 Mc low pass filter network see Figure 4 5 This filter passes any signal frequency below approximately 12 Mc andattenuates all higher frequency signals Thelowpass filter output is amplified by 193 and A1Q4 and fedtothe last transistor amplifier A1Q5 which provides both the output to the counter and the drive for the level indicator meter The limiter diode A1CR1 prevents the amplitude of the video amplifier output signalfrom exceeding approximately 300 mv RMS so that counter input circuits will not be overloaded The low fre quency limit of the video amplifier determined by the bypass and interstage coupling networks is approxi mately 100 kc The converter output signal to the counter when converter is properly tuned will be be tween approximately 100kc and 12 Mc and will have an amplitude that is less than approximately 300 mv RMS 4 11 LEVEL INDICATOR METER 4 12 The DC current supply for the meter is pro duced by metering detector AICR3 and smoothed by capacitor AiC16 see Figure 4 6 The value of shunt resistor A1R2
9. Phoenix Ariz 08792 CBS Electronics Semiconductor Operations Div of C B S Inc Lowell Mass 08984 Mel Rain Indianapolis Ind 09026 Babcock Relays Inc Costa Mesa Calif 09134 Texas Capacitor Co Houston Texas 09145 Atohm Electronics Sun Valley Calif 09250 Electro Assemblies Inc Chicago lll 09569 Mallory Battery Co of Canada Ltd Toronto Ontario Canada 09664 The Bristol Co Waterbury Conn 10214 General Transistor Western Corp Los Angeles Calif 10411 Ti Tel Inc Berkeley Calif 10646 Carborundum Co Niagara Falls N Y 11236 CTS of Berne Inc Berne Ind 11237 Chicago Telephone of California Inc So Pasadena Calif 11312 Microwave Electronics Corp Palo Aito Calif 11534 Duncan Electronic Inc Santa Ana Calif 11711 General Instrument Corporation Semiconductor Division Newark N J 11717 Imperial Electronic Inc Buena Park Calif 11870 Melabs inc Palo Alto Calif 12136 Philadelphia Handle Co Camden N J 12697 Clarostat Co Dover N H 12859 Nippon Electric Co Ltd Tokyo Japan 12930 Delta Semiconductor Inc Newport Beach Calif 13103 Thermolloy Dallas Texas 13396 Telefunken 6 8 Hannover Germany 13835 Midland Mfg Co Kansas City Kansas 14099 Sem Tech Newbury Park Calit 14193 Calif Resistor Corp Santa Monica Calif 14298 American Components Inc Conshohocken Pa 14655 Cornell Dubilier Elec Corp So Plainfield N J 14960 Williams Mfg Co San Jose Calif 15203 Webster E
10. SINIOd 1531 IN3NOdWOD 03123135 AUOLIVA S31V2IQNI 4 6518315 2 SQVHVJO2Id NI 32NVLIOVdYO SWHO NI 3249151539 Q31V2 0N 3SIWH3H10 SS3 NO l S310N n lee 10 BER 142 49 IW If 13 v2 129 Xi33ud V X143Ud EV xi43Hd Iv Xid3ud SNOILYNSISAG 39N343J34 Xi43Hd ON NOILYNSISIA GALVSIGNI St OL X1434d SV IV NOIIVNO2IS3Q An8W3SSV OV NOILVNOIS3Q ani 9 oo bla 0 00 1061 2 j 600 058 s B Z vi 004 22 i 0600 1061 MH313W ant 1600 0581 in 09 592 op00 1061 Yo 713437 Bio cuo 40193130 6285 B SNI83 130 42 Gee ous 9 SIN An ane e 31314W05 WHO4 OL O31vIA3HHHV ASSY 8 O3GIA NiHLIM SNOILVNOIS30 32N393J3H J0Hl1NO2 A9N3003H4 ONIXIW AiluviOd NOILYNSIS3Q O31v2IONI Ol X1434d SV bY NOILVN9SIS3U AlHW3sSV Gav NOIlVNSIS3U 80123135 JINONHVH NOI1VNSIS3Q 031 210 OL Xl43Hd SV V NOLLVN9IS3Q A18W3SSY 00 NOLIVNBIS30 31314W02 WHO4 01 O3lviA3HH8V 34V ASSY HOLVH3N39 OINQWMYH SNOILVN9IS3Q 30N3H3 43M SI OL 0022 9001 Indani 132 1H22v eid z alui oet I 95 60 I i 95 30014 Te 3100 533 15 vs6 vegze ATINISSY 30010 4215 ZV 31314W05 WHO OL 031VIA38887 18 355 JJXIW NIHAIA SNOILVN9I
11. Stock No Description A2 5253A 95A ASSY STEP RECOVERY DIODE NOT RECOMMENDED FOR FIELD REPLACEMENT AZCR1 1901 0120 DIODE STEP RECOVERY SPECIALLY SELECTED PART A2E1 CORE TOROID SPECIALLY SELECTED PART 5 5253A 65B ASSY HARMONIC GENERATOR A3C1 0150 0093 C FXD CER 0 01 UF 80 20 100VDCW A3C2 0170 0094 C FXD MY 0 047 UF 20 50VDCW A3C3 0140 0151 C FXD 820 PF 2 300VDCW 0140 0200 C FXD MICA 390 PF 5 Z00VDCW A3CS 0130 0016 C VAR CER 5 25 PF NPO A3C6 0140 0191 C FXD MICA 56 PF 5 300VDCW A3L1 9140 0107 COIL FXD RF 27 UH A3L2 9140 0025 COIL FXD RF 4 7 UH A3R1 0686 2425 R FXD COMP 2400 OHM 5 1 2W AZR2 0683 2205 R FXD COMP 22 OHM 5 1 4W A3R3 0683 5625 R FXD COMP 5600 OHM 5 1 4W FACTORY SELECTED PART TYPICAL VALUE GIVEN 5253A 65C ASSY MIXER DOES NOT CONTAIN A4CR1 ORDER SEPARATELY 1 0140 0069 C FXD MICA 550 PF 10 500VDCW A amp C2 0150 0050 C FXD CER 1000 PF 600VDCW AACS 0170 0040 C FXD MY 0 047 UF 10 200VDCW AA amp CR1 1900 0011 DIODE SILICON 1N4168M MATCHED PAIR AUCR2 1910 0016 DIODE GERMANIUM 1 MICROSEC 60 WIV A L1 9140 0142 COIL FXD RF 2 2 UH A4R1 0683 3305 R FXD COMP 33 OHM 5 1 4W A4RZ 0683 3305 R FXD COMP 33 OHM 5 1 4W A4R3 0684 5621 R FXD COMP 5 6K OHM 10 1 4W 0683 2245 R FXD COMP 220K OHM 5 1 4W AURS 0683 2245 R FXD COMP 220K OHM 5 1 4W A amp R6 0685 2715 R FXD COMP 270 OHM 5 1 AW amp 7 0683 6205 R FXD COMP 62 OHM 5 1 4W FACTORY SELECTED APRT TYPICAL VALUE GIVEN C21 0160 0127
12. in Mc for frequency of INPUT signal 3 11 88 TO 512 MC AMPLITUDE LESS THAN 50 MV RMS The front panel level indicator meter indi cates in the green portion of its scale only when con verter is properly tuned and amplitude of INPUT signal is adequate for accurate frequency measurement However because of conservative specifications of both the converterand counter frequencies may often be accurately measured when meter reads in the red portion of its scale To make these extended range measurements a Follow normal procedure Figure 3 2 or Para graph 3 10 depending upon frequency range except that mixing frequency controlshould betuned for first maximum reading on the level indicator meter re gardless of the color of region maximum b Check frequency measurement result as des cribed in Paragraph 3 12 or c Insert an external variable attenuator such as Hewlett Packard Model 355A or 355C in the trans mission line betweenthe converter and the source of INPUT signal Vary attenuation from 0 to 1 db during final step of frequency measurement procedure If counter display does not change more than momentarily during switching of attenuator INPUT signalis above noise threshold and frequency measurement result is valid 3 12 DOUBLE CHECKING FREQUENCY MEASUREMENT RESULT 3 13 Because of the heterodyne action of the con verter frequency measurement results obtained at any one setting of the mixing frequency contro
13. 0189 C FXD MICA 5825 PF 2 300VDCW 0150 0121 C FXD CER 0 1 UF 80 20 50VDCW 1901 0040 DIODE SILICON 1901 0040 DIODE StLICON 1901 0040 DIODE SILICON 9140 0118 COIL 500MH 5 9140 0118 COIL 500 MH 5 9140 0126 COIL VAR 1 76 4 02 UH 9140 0125 COIL VAR 0 9 1 9 UH 9140 0111 COIL FXD RF 3 3 UH 1850 0091 TRANSISTOR GERMANIUM PNP 2N2048 1850 0091 TRANSISTOR GERMANIUM PNP 2N2048 1850 0091 TRANS ISTOR GERMANIUM PNP 2N2048 1850 0091 TRANSISTOR GERMANIUM PNP 2N2048 0683 7525 R FXD COMP 7500 OHM 5 1 4W 0683 1225 R FXD COMP 1200 OHM 5 1 4W 0683 1225 R FXD COMP 1200 OHM 5 1 4W 0683 3305 R FXD COMP 33 OHM 5 1 4W 0683 1225 R FXD COMP 1200 OHM 5 1 4W 0683 3615 R FXD COMP 360 OHM 5 1 4W 0683 1025 R FXD COMP 1000 OHM 5 1 4W 0684 2701 R FXD COMP 27 OHM 10 1 4 0684 1511 R FXD COMP 150 OHM 10 1 4W 0683 2225 R FXD COMP 2 2 OHM 5 1 4 0683 4725 R FXD COMP 4700 OHM 5 1 4W 0683 4925 COMP 4700 OHM 5 1 4W 0683 6815 R FXD COMP 680 OHM 5 1 4W 0683 5115 R FXD COMP 510 OHM 5 1 4W 0683 3915 R FXD COMP 390 OHM 5 1 4W 0683 1025 R FXD COMP 1000 OHM 5 1 4W 0683 1225 R FXD COMP 1200 OHM 5 1 4W 0684 1041 R FXD COMP 100K OHM 10 1 4W 0683 8205 R FXD COMP 82 OHM 5 1 4W FACTORY SELECTED PART TYPICAL VALUE GIVEN See list of abbreviations in introduction to this section HA 12 01874 1 HP 5253 Frequency Converter max Model 5253B Appendix Table HA 3 Reference Designation Index Cont d en
14. 1025 RIFXD COMP 1000 OHM 5 1 4W A1LR2 0683 3925 RIFXD COMP 3900 OHM 5 1 40 A1R3 0683 4305 RIFXD COMP 43 OHM 5 25W AIRG 0683 5115 RtFXO COMP 510 OHM 5 1 4W A1R5 0683 1025 RIFXD COMP 1000 OHM 5 1 8W AIRE 0683 5115 RIFXD COMP 510 OHM 5 1 48 AIR 0683 4315 RIFXD COMP 430 OHM 5 1 4W A1R8 0683 1315 R sFX COMP 130 OHM 5 1 4W A1R9 0683 1815 RIFXD COMP 180 OHM 5 1 4W AIR1O 0683 4305 RIFXD COMP 43 OHM 5 25W 1 11 0683 5115 RIFXD COMP 510 OHM 5 1 4W AiRi2 0683 1025 RIFXD COMP 1000 OHM 5 1 4W A1R13 0683 5115 RIFXD COMP 510 OHM 5 1 4W AIRIM 0683 4315 RIFXD COMP 450 OHM 5 1 40 AIRIS 0683 5125 RIFXD COMP 5100 OHM 5 1 4W A1R16 0683 2725 RIFXD COMP 2700 OHM 5 1 4W 1 17 0683 7515 RIFXD COMP 750 OHM 5 1 4W See list of abbreviations in introduction to this section 6 2 01874 2 HP 5253 Frequency Converter max Model 5253B Reference Desig A1R18 A1R19 1820 2 A2C1 A2GR1 2 1 A2E2 21 1 A2R1 A3C1 A3C2 A3C3 A3C4 A3CS A3C6 A3L1 A3L2 A2Q1 ASRI A3R2 A3R3 Au AUCI 2 AuC3 AUCRI AUCR2 AuLl AURI AUR2 AURI AURA AURS 466 C21 c22 01874 3 0683 3915 0683 1525 0683 4305 05253 6005 0150 0061 9170 0029 9170 0029 9140 0170 0683 3515 5253A 65B 0150 0095 0170 0094 0140 0151 0140 0200 0130 0016 0140 0191 9140 0107 9140 0025 1854 0005 0686 2425 0683 2205 0683 5625 5252 65 0140 0069 0150 0050 0170 0040 190
15. 2564 TWX 602 792 2759 CALIFORNIA North Hollywood 91604 3939 Lankershim Blvd 213 877 1282 and 766 3811 TWX 910 499 2170 Sacramento 95821 2591 Carlsbad Ave 916 482 1463 TWX 916 444 8683 San Diego 92106 1055 Shafter Street 714 223 8103 TWX 714 276 4263 Palo Alto 94303 1101 Embarcadero Rd 415 327 6500 TWX 910 373 1280 COLORADO Englewood 80110 7965 East Prentice 303 771 3455 TWX 303 771 3056 CONNECTICUT Middletown 06458 589 Saybrook Rd 203 346 6611 TWX 710 428 2036 FLORIDA Miami 33125 2907 Northwest 7th St 305 635 6461 Orlando 32803 621 Commonwealth Ave 305 425 5541 TWX 305 275 1234 St Petershurg 33708 410 150th Ave Madeira Beach 813 391 0211 TWX 813 391 0666 GEORGIA Atlanta 30305 3110 Maple Drive N E 404 233 1141 TWX 810 751 3283 HAWAII North Hollywood Calif 91604 3939 Lankershim Blvd 213 877 1282 and 766 3811 TWX 910 499 2170 ILLINOIS Skokie 60078 5500 Howard Street 312 677 0400 TWX 910 223 3613 INDIANA Indianapolis 46205 3919 Meadows Dr 317 546 4891 TWX 317 635 4300 LOUISIANA New Orleans 504 522 4359 MARYLAND Baltimore 21207 6660 Security Blvd 301 944 5400 Rockville 20852 12303 Twinbrook Pkwy 301 427 7560 TWX 710 828 9684 MASSACHUSETTS Burlington 01804 Middlesex Turnpike 617 272 9000 TWX 710 332 0382 MICHIGAN Southfield 48076 24315 Northwestern Hwy
16. 313 353 9100 TWX 313 357 4425 MINNESOTA St Paul 55114 2459 University Ave 612 646 7881 TWX 910 563 3734 MISSOURI Kansas City 64131 7916 Paseo Street 816 444 9494 TWX 816 556 2423 St Louis 63144 2814 South Brentwood Blvd 314 647 4350 TWX 314 962 3933 NEW JERSEY Eatontown 201 542 0852 Englewood 07631 391 Grand Avenue 201 567 3933 NEW MEXICO Albuquerque 87108 6501 Lomas Blvd 505 255 5586 TWX 910 989 1655 las Cruces 88001 114 S Water Street 505 526 2486 TWX 505 524 2671 NEW YORK New York 10021 236 East 75th Street 212 879 2023 TWX 710 581 4376 Rochester 14623 39 Saginaw Drive 716 473 9500 TWX 510 253 5981 Poughkeepsie 12601 82 Washington Street 914 454 7330 TWX 914 452 7425 Syracuse 13211 5858 East Molloy Rd 315 454 2486 TWX 710 541 0482 Endicott 13764 1219 Campville Rd 607 754 0050 TWX 510 252 0890 NORTH CAROLINA High Point 27262 1923 N Main Street 919 882 6873 TWX 510 926 1516 OHIO Cleveland 44129 5579 Pearl Road 216 884 9209 TWX 216 888 0715 Dayton 45409 1250 W Dorothy Lane 513 298 0351 TWX 513 944 0090 OKLAHOMA Oklahoma City 405 235 7062 PENNSYLVANIA Camp Hill 717 737 6791 West Conshohocken 19428 144 Elizabeth Street 215 248 1600 and 828 6200 TWX 215 828 3847 Monroeville 15146 2545 Moss Side Blvd 412 271 5227 TWX 710 797 3650 HP 5253 Frequency Conver
17. 40 UNITED KINGDOM Hewlett Packard Ltd Dallas Rd Bedford England Tel Bedford 68052 VENEZUELA Citec C A Edif Arisan Of 4 Avda Francisco de Miranda Chacaito Apartado del Este 10 837 Caracas Tel 71 88 05 YUGOSLAVIA Belram S A 83 Avenue des Mimosas Brussels 15 Belgium Tel 35 29 58 ELSEWHERE Hewlett Packard Overseas Sales Department 1501 Page Mill Road Palo Alto California 94304 U S A Telephone 415 326 7000 TWX 910 373 1267 Telex 033811 Cable HEWPACK HP 5253 Frequency Converter max
18. 512 Mc with output of 50 mv Coun ter should display correct frequency at any frequency within this range Figure 5 1 Video Amplifier Assembly Al Component Location 5 6 01874 2 HP 5253 Frequency Converter max Model 5253B Section V Figure 5 2 A3CI A3RI ASR2 A3C3 A3C2 HARMONIC GENERATOR ASSEMBLY HIDDEN c22 AZCRI A3QI 4 5 2 A3R3 2 2 A2RI A2CI 57 CAUTION DAMAGE COUNTER WILL RESULT IF THIS POINT IS GROUNDED 05253 A 7 Figure 5 2 Left Side View 01874 2 5 7 HP 5253 Frequency Converter max Section V Model 5253B Figure 5 3 Yr A4CRIB A4R7 485 485 A4C2 486 Rel Cel A4 MIXER ASSEMBLY HARMONIC of SELECTOR CAVITY A4R2 A4RI E2 EI A4C3 A4LI AACRIA 484 1040 05253 A 10 Figure 5 3 Right Side View 5 8 01874 1 HP 5253 Frequency Converter max Model 5253B VIDEO AMPLIFIER ASSEMBLY 05253 A 8 Figure 5 4 Top View Test Points 01874 2 HP 5253 Frequency Converter max JI BNC FRONT PANEL INPUT 2V RMSMAX A3 HARMON 10MC J2 REAR PANEL Al VIDEO AMPLIFIER ASSEMBLY 05253 6007 RI 1000 2 R 3900 HP 5253 Frequency Converter max R2I 20V 3600 R3 560 JI ONT PANEL J 550 gt t NET IPUT d A E 7 MSMAX El E2 FERRITE RINGS HARMONIC GENERATOR ASSEMBLY 52534 658 I 1 4 T
19. 6 1 Reference Designation Index Pra ass 09 Stock No Description A1 05253 6007 ASSYIAMPLIFIER 05253 2007 BOARD BLANK 1 1 0160 0128 2 20 20 25VDCW A1C2 0180 0100 ELECT TA 4e7UF 10 35V0CW A1C3 0160 0127 C3FXD CER 1UF 20 25VDCW Aic4 0160 0137 O 33UF 20 25VDCW 1 5 0160 0127 CIFXD CER IUF 20 25VOCW A1C6 0160 0127 CER 10 20 25VOCW 1 7 0140 0194 MICA 110 PF 5 300 VDCW A1C8 0160 0178 MICA 27PF 5 300VDCW 1 9 0160 0332 MICA 133PF 1 1 10 0140 0214 MICA 60PF 5 300VDCW 1 11 0140 0192 CIFXD MICA 68PF 5 300VDCW A1C12 0160 0127 CER 1UF 20 25VDCW A1C13 0160 0127 CtFXD CER 10 20 25 Aici4 0160 0127 CIFXO CER 1UF 20 25VDCW A1C15 0160 0161 MY 0 01 UF 10 200VDCW A1C16 0150 0121 CER O 1UF 80 20 SOVOCW AICRI 1910 0022 SEMICON DEVICE IDIODE GE 100MA 6PIV 3 5NS 1 2 1910 0022 SEMICON DEVICE DIODE GE 10 6PIV 3 5NS AICRS 1910 0022 SEMICON DEVICE DIODE GE 100MA 345NS AlLl 9140 0137 COILtFXD RF 1000UH A1L2 9140 0138 COILIFXD RF 180UH 5 A1L3 9140 0126 COILIVAR 1276 4202 A1L4 9140 0125 COILIVAR 0 9 1 9 UH A1L5 9140 0143 COIL FXD RF 3 3 UH 101 1854 0005 TRANSISTOR 2N708 NPN SILICON A102 1853 0009 TRANSISTOR SIL ICON PNP A103 1854 0005 TRANSISTORt2N708 NPN SILICON A1Q4 1853 0009 TRANSISTOR SILICON PNP A1Q5 1854 0005 TRANSISTOR 2N708 NPN SILICON 1 1 0683
20. Auckland Tel 565 361 NORWAY Morgenstierne amp Co A S Ingeniorfirma 6 Wessels Gate Oslo Tel 20 16 35 For Sales and Service Assistance in Areas Not Listed Contact IN LATIN AMERICA Hewlett Packard Inter Americas 1501 Page Mill Road Palo Alto California 94304 U S A Telephone 415 326 7000 TWX 910 373 1267 Telex 033811 Cable HEWPACK HP 5253 Frequency Converter max INTERNATIONAL OFFICES and Service PANAMA Electronico Balboa S A 0 Box 4929 Panama City 5 Panama Tel 3 0833 PERU Fernando Ezeta B Casilla 3061 Lima Tel 78745 PORTUGAL TELECTRA Rua Rodrigo da Fonseca 103 P 0 Box 2531 Lisbon 1 Tel 68 60 72 and 68 60 73 and 68 60 74 PUERTO RICO amp VIRGIN ISLANDS San Juan Electronics Inc 150 Ponce de Leon Stop 3 0 Box 5167 Pta de Tierra Sta San Juan 00906 Tel 725 3342 724 4406 SPAIN ATAIO Ingenieros Enrique Larreta 12 Madrid 6 Tel 235 43 44 and 235 43 45 SOUTH AFRICA F H Flanter amp Co Pty Ltd Rosella House Buitencingle Street Cape Town Tel 3 3817 SWEDEN H P Instrument AB Centralvagen 28 Solna Centrum Tel 83 08 30 H P Instrument AB Idunagatan 28A Goteborg Tel 27 68 00 and 27 68 01 SWITZERLAND Max Paul Frey Wankdorffeldstrasse 66 Berne Tal 031 42 00 78 TAIWAN FORMOSA Hwa Sheng Electronic Co Ltd 21 Nanking West Road Taipei Tel 4 6076 4 5936 TURKEY TELEKOM Engineering Bureau 0 Box 376 Galata Istanbul Tel 49 40
21. C FXD CER 1 0 UF 20 25VDCW C22 0140 0069 C FXD MICA 550 PF 10 500VDCW C23 0160 0127 C FXD CER 1 0 UF 20 25VDCW C24 0160 0227 C FXD CER 1 0 UF 20 25VDCW El 9170 0059 CORE TOROID E2 9170 0059 CORE TOROID 9170 0059 CORE TOROID Jl 1250 0102 CONNECTOR BNC J2 1251 0099 CONNECTOR 50 P IN MINIATURE R21 0684 5621 R FXD COMP 5600 OHM 10 1 4W 1 1251 0135 CONNECTOR 15 CONTACTS See list of abbreviations in introduction to this section 01874 1 13 HP 5253 Frequency Converter max Appendix II Stock No 2252A 65A 5252 658 5252 65 2255A 95A 0120 0016 0140 0069 0140 0151 0140 0176 0140 0189 0140 0191 0140 0193 0140 0200 0140 0203 0140 0204 0150 0050 0150 0093 0150 0121 0160 0127 0160 0137 0170 0040 0170 0094 0180 0100 0683 1025 0683 1225 0683 2205 0683 2225 0683 2245 0683 2715 0683 3305 0685 5615 0685 5915 0683 4725 0683 5115 0685 5625 0683 6205 0683 6815 0683 7525 0683 8205 0684 1041 0684 1511 0684 2701 0684 5621 0686 2425 1250 0102 1251 0099 1251 0135 1850 0091 1900 0011 1901 0046 1910 0016 9140 0025 9140 0107 9140 0111 9140 0118 9140 0125 9140 0126 9140 0142 9170 0059 IIA 14 C VAR C FXD C FXD C FXD C FXD C FXD C FXD FXD C FXD C F XD C FXD C F XD C FXD C FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R FXD R F
22. FSC H4 1 H4 2 Handbook Supplements Dated DECEMBER 1964 Dated MARCH 1962 6 7 Section VI Table 6 3 Code No 81349 81415 81453 81483 81541 81860 82042 82142 82170 82209 82215 82376 82389 82647 82866 82877 82893 83053 83058 83086 83125 83148 83186 83298 83315 83330 83385 83501 83594 83740 83777 83821 84171 84396 84411 84970 85454 8547 Manufacturer Address Military Specification Wilkor Products Inc Cleveland Ohio Raytheon Mfg Co Industrial Components Div Industr Tube Operations Newton Mass International Rectifier Corp Segundo Calif The Airpax Products Co Cambridge Mass Barry Controls Inc Watertown Mass Carter Parts Co Skokie iil Jeffers Electronics Division of Speer Carbon Co Du Bois Pa Allen 8 DuMont Labs Inc Clifton N J Maguire Industries Inc Sylvania Electric Prod Inc Greenwich Conn Electronic Tube Div Emporium Pa Astron Co East Newark N J Switchcraft Inc Chicago IN Metals and Controls Inc Div of Texas Instruments Inc Spencer Prods Research Praducts Corp Rotron Manufacturing Co Inc Vector Electronic Co Western Washer Mfr Co Los Angeles Calif Carr Fastener Co Cambridge Mass New Hampshire Ball Bearing Inc Peterborough N H Darlington S C Los Angeles Calif Springfield N J Attleboro Mass Madison Wis Woodstock N Y Glendale Calif Pyr
23. Inc Philadelphia Pa Federal Screw Prod Co Chicago 111 Fischer Special Mfg Co Cincinnati Ohio The General industries Co Elyria Ohio Goshen Stamping amp Tool Co Goshen Ind IFD Electronics Corp Brooklyn N Y Jennings Radio Mfg Co San Jose Calif Signalite Inc J H Winns and Sons Industrial Condenser Corp R F Products Division of Amphenol Borg Electronics Corp Danbury Conn E F Johnson Co Waseca Minn International Resistance Co Philadelphia Pa Jones Howard B Division Neptune N J Winchester Mass Chicago Ill of Cinch Mfg Corp Chicago James Knights Co Sandwich IH Kulka Electric Corporation Mt Vernon N Y Lenz Electric Mfg Co Chicago Littlefuse Inc Des Plaines 11 Lord Mfg Co Erie Pa C W Marwedel San Francisco Calif Micamold Electronic Mfg Corp Brooklyn James Millen Mfg Co Inc J W Miller Co Monadnock Mills Mueller Electric Co Manufacturing Co Bendix Pacific Division of Bendix Corp Pacific Metals Co Phaostran Instrument and Electronic Co Phoell Mfg Co Philadelphia Steel and Wire Corp i Philadelphia Pa Potter and Brumfield Div of American Machine and Foundry Princeton Ind Radio Condenser Co Camden NJ Radio Receptor Co Inc Brooklyn Resistance Products Co Harrisburg Pa Rubbercraft Corp of Calif Torrance Calif Shakeproof Division of Illinois Malden Mass Los Angeles Calif San Leandro Calif
24. and 130 mv H voltage is too high increase value of AIR19 If volt age is too low decrease value of AIR19 Repeat steps d and e after changing value of AIR19 5 25 MECHANICAL ADJUSTMENT OF METER ZERO 5 26 TRUE SIGNAL LEVEL INDICATION Level indicator meter is adjusted at the factory for proper mechanical zero However normal aging of meter components may change indicated zero level To insure accuracy of input signal level indication periodic adjustment of meter zero may be necessary 5 27 ZERO SET When meter is properly zero set pointer rests over the zero calibration mark at the left hand end of meter scale when converter is 1 at normal operating temperature 2 in normal operating position and 3 without power Proceed as follows a Allow counter and converter to operate for one hour to permit meter movement to reach normal oper ating temperature b Turn counter off and allow one minute for all capacitors to discharge c Remove converter from counter to enable access to rear of meter d Remove adhesive backed paper cover from meter zero adjustment access hole on top rear of meter e Carefully insert small tool in access hole and engage adjustment fork f Vary setting of adjustment fork until meter reads Zero g Remove tool and replace adhesive backed paper cover on access hole This completes meter zero adjustment procedure 5 28 SENSITIVITY CHECK a Turn counter power off remove conve
25. e d and e with VHF Gener ator frequency of 472 Mc and converter mixing fre quency control set to 470 Mc Converter output to counter as measured by RF Millivoltmeter should be at least 100 mv g A similar check may be made at any frequency within the range of the Model 5253A Converter out put to counter should be at least 100 mv when differ ence frequency is between 100 kc and 12 Mc and con verter is properly tuned 27 METER ACCURACY CHECK a Turn counter power off remove converter from counter and reconnect to counter with Extension Cable 10506A b Set VHF Signal Generator to 102 Mc CW at 50 mv and connect to INPUT of converter c Set controls as shown in Figure IIA 1 Set con verter mixing frequency control to 100 Mc Counter Should display approximately 2 Mc d Vary output of VHF Signal Generator for con verter level indicator to make meter read at red green border e Using RF Millivoltmeter measure converter output to counter at Test Point 413 Voltage should be between 100 mv and 130 mv If not see Para graph 21 for meter calibration adjustment procedure 28 LOW PASS FILTER CHECK a Turncounter power off remove converter from counter and reconnect to counter with Extension Cable 10506A b Set VHF Signal Generator to 110 Mc CW at 50 mv and connect to INPUT of converter c Set controls as shown in Figure 1 Set con verter mixing frequency control to 100
26. from the date of delivery or in the case of certain major components listed in the operating manual for the specified period We will repair or replace products which prove to be defective during the warranty period No other warranty is expressed or implied We are not liable for consequential damages For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual HP 5253 Frequency Converter max OPERATING AND SERVICE MANUAL MODEL 5253B FREQUENCY CONVERTER SERIALS PREFIXED 513 This manual applies directly to Model 5253B Frequency Converters having serial number prefix 513 OLDER INSTRUMENTS This manual with changes provided in Appendix I also applies to models having serial prefix numbers 450 321 and 311 MODEL 5253A This manual with information provided in Appendix II also applies to Model 5253A Frequency Converters having serial prefix numbers 238 and 226 Copyright HEWLETT PACKARD COMPANY 1963 1501 PAGE MILL ROAD PALO ALTO CALIFORNIA U S A 01874 3 Printed NOV 1965 HP 5253 Frequency Converter max Table of Contents TABLE OF CONTENTS Section Page I EE 1 1 1 1 Description ee Sek 1 1 1 5 1 1 1 1 vue 1 9 Instrument 1 1 1 11 Cooling E aes 1 1
27. if INPUT signal amplitude is adequate for accurate frequency measurement 1 5 SPECIFICATIONS 1 6 Table 1 1 contains all technical specifications for the Model 5253B when operated in the Model 5243L or Model 5245L Electronic Counter Test specifica tions given in the Maintenance Section Section V of this manual for the purposes of troubleshooting and adjustment do not represent the technical specifica tions of the instrument 1 7 ACCESSORY 1 8 A 50 ohm coaxial cable 48 inches long male BNC to male BNC is furnished with the Model 5253B 1 9 INSTRUMENT IDENTIFICATION 1 10 Hewlett Packard identifies each Model 5253B with a two section eight digit serial number If the first three digits of the serial number of your instru ment do not agree with those on the title page of this manual change sheets supplied with the manual will define the differences between your instrument and the Model 5253B described in this manual 1 11 COOLING 1 12 The Model 5253B is cooled by the ventilation system of the counter in which it is installed See operating and service manual of counter for cooling system maintenance instructions Table 1 1 Specifications As converter for 5243L or 5245L counter 50 Mc to 512 Mc using mixing frequencies of 50 Mc to 500 Mc in 10 Mc steps ACCURACY Retains accuracy of 5243L or 5245L counter INPUT VOLTAGE RANGE 50 mv to 1 v RMS MAXIMUM INPUT 2 v RMS or 100 vdc will not damag
28. manufacturer of the part in a five digit code see list of manufacturers in Table 6 3 Manufacturer s part number d Total quantity used in the instrument TQ column A assembly E misc electronic part MP mechanical part TB terminal board B motor F use P plug TP test point C capacitor FL filter Q transistor V vacuum tube neon CP coupling J jack R resistor bulb photocell etc CR diode K relay RT thermistor w cable DL delay line L inductor S switch x socket DS device signaling lamp M meter T transformer Y crystal ABBREVIATIONS A amperes GE germanium N C normally closed RMO rack mount only A F C automatic frequency control GL glass NE neon RMS root mean square AMPL amplifier GRD ground ed nickel plate N O normally open S B slow blow beat frequency oscillator H henries NPO negative positive zero SCR screw BE CU beryllium copper HEX hexagonal zero temperature SE selenium BH binder head HG mercury coefficient SECT section s BP bandpass HR hour s not recommended for SEMICON semiconductor BRS brass field replacement SI silicon BWO backward wave oscillator IF intermediate freq NSR not separately SIL silver IMPG impregnated replaceable SL slide CCW counter clockwise INCD incandescent SPL special CER ceramic INCL include s OBD order by description SST stainless steel CMO cabi
29. valuable electronic equipment during storage or reshipment always use the best packaging methods available Your Hewlett Packard field engineer can provide packing materials similar to those used for original factory packaging Here are two recommended packing methods a Original Place instrument in original container Replace each packing pad and filler in the exact position that it originally occupied b Alternate Cover panelwith softwrapping paper Wrap corrugated cardboard completely around instru ment and place in strong corrugated cardboard con tainer 350 lb sq in bursting test Insert filler material between wrapped instrument and container to obtain a snug fit on all surfaces Filler should be rubberized hair 2 in thick excelsior 6 in thick or equivalent 2 1 ENVIRONMENT Conditions during storage and shipment should normally be limited as follows a Maximum altitude 20 000 feet 6 096 meters 01874 2 b Minimum temperature 40 F 409C c Maximum temperature 167 F 75 C CAUTION TURN COUNTER POWER OFF BEFORE INSTALLING OR REMOVING FREQUENCY CONVERTER 2 8 INSTALLATION 2 9 The Model 5253B plugs into the rectangular compartment at the right hand side of the frontpanel of the Model 52431 5245L Electronic Counter To install unit in counter first check that retaining screw see Figure 3 1 is turned fully counterclockwise then push unit firmly into compartment until fro
30. 0 0011 1910 0916 9140 0142 0683 3305 0683 3305 0684 5621 0683 2245 0683 2245 0685 2715 0683 6205 0160 0127 0140 0069 Section VI Table 6 1 Table 6 1 Reference Designation Index Cont d Stock No Description RIFXD COMP 390 OHM 5 1 4W RIFXD COMP 1500 OHM 5 1 8W RIFXD COMP 43 OHM 5 25W FACTORY SELECTED COMPITYPICAL VALUE GIVEN ASSY STEP RECOVERY DIODE CER 20 PF 100 VOCW SPECIALLY SELECTED PART NOT RECOMMENDED FOR FIELD REPLACEMENT CORE FERRITE BEAD CORE FERRITE BEAD COIL FXD 15 UH 20 350 RtFXO COMP 330 OHM 5 1 uW FACTORY SELECTED PARTtTYPICAL VALUE GIVEN ASSYIHARMONIC GENERATOR CER O 01UF 80 20X LOOVDCW CIFXD MY OcOU7UF 20 50VDCW C FXD MICA 820PF 2 300VDCW C FXD MICA 390PF 5 300VOCW C VAR CER 5 25 PF NPO C FXD MICA 56 PF 5 300 VDCW COILIFXD RF 27 UM COIL FXD RF 4 7 UHY TRANSISTOR SILICON NPN 2N708 RIFXD COMP 2460 OHM 5 1 2W RIFXD COMP 22 OHM 5 j uW RIFXD COMP 5600 OHM 5 1 uW FACTORY SELECTED PARTITYPICAL VALUE GIVEN ASSYIMIXER CIFXD MICA 550 PF 10 500 VDCW CIFXD 1000PF 600 VDCW C3FXD MY 047 UF 10 200VDCW SEMICON DEVICE 0100 1 4168 MATCH PAIR DIODE GERMANIUM 100MA 5 60PIV COILiFXD RF 2 2 UH RIFXO COMP 33 OHM 5 1 4W RIFXD COMP 33 OHM 5 1 4W RIFXD COMP 5 6K OHM 10 1 4W RIFXD COMP 220K OHM 5 1 44 RIFXD COMP 220K OHM 5 1 UuW RIFXD COMP 270 OHM 5 1 uW RIFXD COMP 62 OHM
31. 0 TO 50 1 MC 50 MV TO 1 V RM5 Per form steps 1 through 5 of Figure 3 2 Then a Set mixing frequency control to slightly more than 60 Mc b Turn mixingfrequency controlslowly clockwise until level indicator meter first reaches a maximum reading in the green portion of its scale c Subtract counter display in Mc from reading of mixing frequency control in Mc for frequency of INPUT signal 3 11 50 TO 512 MC AMPLITUDE LESS THAN 50 MV RMS The front panel level indicator meter indi cates in the green portion of its scale only when con verter is properly tuned andamplitude of INPUT signal is adequate for accurate frequency measurement However because of conservative specifications of both the converter and counter frequencies may often be accurately measured when meter reads in the red portion of its scale To make these extended range measurements a Follow normal procedure Figure 3 2 or Para graph 3 10 depending upon frequency range except that mixing frequency control should betuned for first maximum reading on the level indicator meter re gardless of the color of region maximum b Check frequency measurement result as des cribed in Paragraph 3 12 or c Insert an external variable attenuator such as Hewlett Packard Model 355A or 355C in the trans mission line betweenthe converter and the source of INPUT signal Vary attenuation from 0 to 1 db during final step of frequency measurement procedure If cou
32. 0 is selected to make level indicator meter M1 read at red green border when amplitude of converter output to counter is in excess of the 100 mv RMS minimum signalamplitude normally required by the counter for accurate frequency measurement 20V INPUT R CONNECTOR BALUN 2 SIGNAL El 2 N id ME CRIB CN t t b d 3 Seed n P pi CR2Z FERRITE RINGS C3 LI R6 OUTPUT TO VIDEO AMPLIFIER EINE eo cL 05253 8 7 Figure 4 4 Balanced Mixer A4 4 2 01874 3 HP 5253 Frequency Converter max Model 5253B Section IV Figures 4 5 and 4 6 LEVEL INDICATOR METER INPUT Low PASS PUT ud FROM MIXER 12 MC CUTOFF L or RUE cue F 7 o5253 B8 8 Figure 4 5 Video Amplifier A1 PART OF AI 15V I OUTPUT I5 COUNTER Figure 4 6 Level Indicator Meter Circuit 01874 2 4 3 4 4 HP 5253 Frequency Converter max Model 5253B Section V Paragraphs 5 1 to 5 11 SECTION V MAINTENANCE 5 1 GENERAL 5 2 INTRODUCTION 5 3 This section contains information concerning periodic maintenance troubleshooting and recommended test equipment repair circuit adjustments and per formance testing A complete schematic diagram of the converter is at the rear of this section Figure 5 5 5 4 PERIODIC MAINTENANCE 5 5 Nospecial maintenance procedures are required when the converteris operatedin normalenvironments However if unit is subjected to opera
33. 2 21 Nana SSYd l e J IA 1 NOILYNOIS3U 031 210 1 OL Xi43ud Sy V NOILVN5IS3O A18N3SSY NOI LVN9I630 3131dNO02 MNO4 OL 031VIA3888V 3uv ASSY HOLYHU3N3D OINOWHVH NIHLIM SNOILYNDIS3O 39N383 434 13NY4 uv3a Z S SZ SZ NN SNE NEE NONE SZ igure F H SNH AZ 13NVd 1N0H4 NS AOZ 01874 2 IA 2 HP 5253 Frequency Converter max Model 5253B Appendix Table I 1 Reference Designation Index Dan Stock No Description 1 52534 654 ASSY1VIOEO AMPLIFIER A1C1 0160 0127 CtFXO 1UF ORM 20 25VDCW 1 2 0160 0127 CIFXD lUF OHM 20 25VDCW A1C3 0180 0100 ELECT 4 7UF 10 35VOCW A1CU 0160 0137 CIFXD CER O 33UF 20 25VDCW 1 5 0160 0127 1UF OMM 20 25VDCW A1C6 0160 0137 CER O 33UF 20 25VDCW A1C7 0140 0176 CtFXD MICA 100 PF 2 300 VOCW A1C8 0140 0203 CIFXD MICA 5 50 A1C9 0140 0193 C FXD MICA 82 PF 5 300 VDCW A1C10 0140 0191 CIFXD MICA 56 PF 5 300 VDCW 0140 0204 C FXD 5 NPO 500 VDCW A1C12 0150 0121 CIFXD 1MF 50VOCW A1C13 0160 0127 1UF OHM 20 25VOCW A1c14 0160 0127 CIFXD 1UF OMM 20 25VOCW 1 15 0140 0189 C FXD MICA 5825 PF 2 300 VDCW A1C16 0150 0121 CIFXD 1MF 50VOCW AICRI 1901 0040 DIODES SILICON A1CR2 1901 0040 DIODE I SILICON AICR3 1
34. 3 04732 0473 04777 04796 04811 04870 05006 05277 05347 05593 05616 05624 06728 05725 05783 05820 06004 06175 06402 06475 06540 06555 06751 06812 07088 Manufacturer Address U S A Common Any supplier of U S McCoy Electronics Mount Holly Springs Pa Sage Electronics Corp Humidail Co Westrex Corp Garlock Packing Co Electronic Products Div Aerovox Corp Rochester N Y Calton Calif New York N Y Camden N J New Bedford Mass Amp Inc Harrisburg Pa Aircraft Radio Corp Boonton N J Northern Engineering Laboratories Inc Burlington Wis Sangamo Electric Company Ordill Division Capacitors Marion Ill Goe Engineering Los Angeles Calif Carl E Holmes Corp Los Angeles Calif Allen Bradley Co Milwaukee Wis Litton Industries Inc Beverly Hills Calif TRW Semiconductors Inc Lawndale Calif Texas Instruments Inc Transistor Products Div The Alliance Mfg Co Chassi Trak Corp Pacific Relays Inc Amerock Corp Pulse Engineering Co Ferroxcube Corp of America Cole Mfg Co Palo Alto Calif Amphenol Borg Electronics Corp Chicago III Radio Corp of America Semiconductor and Materials Div Somerville N J Vocaline Co of America Inc Old Saybrook Conn Hopkins Engineering Co San Fernando Calif G E Semiconductor Products Dept Syracuse N Y Apex Machine amp Tool Co Dayton Ohio Eldema Corp E Monte Calif Transitron Electronic Corp
35. 5 1 4W FACTORY SELECTED PARTI TYPICAL VALUE GIVEN CER LUF 20 25VDCW CIFXD MICA 550 PF 10 500 vOCW NOT RECOMMENDEO FOR FIELD REPLACEMENT See list of abbreviations in introduction to this section 6 3 HP 5253 Frequency Converter max Section VI Table 6 1 Berne c23 c24 El E2 J1 J2 M1 R21 XAL 6 4 Desig ation Tab e 6 1 Reference Designation Index Cont d Model 5253B Stock No Description 0160 0127 0160 0127 9170 0059 9170 0059 9170 0059 1250 0102 1251 0099 1120 0140 0684 5621 1251 0135 05251 0002 05255 0006 05253 2014 05253 0005 See list of abbreviations in introduction to this section CER 1UF 20 25VDCW CER AUF 20 25VOCW MAGNETIC CORE TOROID FERRITE MAGNETIC CORE tTOROID FERRITE MAGNETIC CORESTOROID FERRITE CONNEC TORT BNC CONNECTOR 50 PIN MINAT METERSO 1 MILLIAMPERE EDGE VIEW RIFXD COMP 5 6K OHM 10 1 uW CONNECTORIPRINTED CIRCUIT 15 CONTACTS MISCELLANEOUS BRACKET METER BRACKET PANEL PANEL FRONT PLATE BOTTOM HP 5253 Frequency Converter max 01874 3 Model 5253B Section VI Table 6 2 Table 6 2 Replaceable Parts Stone m Patno frd 0130 0016 CER 5 25 PF NPO 28480 0130 0016 1 0140 0069 CiFXD MICA 550 PF 10 500 VDCW 00853 M 100 E10 2 0180 0151 C FXD MICA 820PF 2 3OOVDCW 04062 15 821035 1 0180 0176 C FXD MI
36. 5 R FXD COMP 130 OHM 5 1 44 01121 1315 1 0683 1525 R FXD COMP 1500 OHM 5 174W 01121 CB 1525 1 0683 1815 R FXD COMP 180 OHM 5 1 w 01121 CB 1815 1 0683 2205 RIFXD COMP 22 OHM 5 1l W 01121 CB 2205 1 0683 2225 RIFXD 2 2K OHM 5 1 4W 01121 CB2225 1 0685 2245 R FXD COMP 220K OHM 5 174W 01121 CB 2245 2 0683 2715 R FXD COMP 270 OHM 5 1 QW 01121 CB 2715 1 0683 2725 RIFXD COMP 2700 OHM 5 17uw 01121 2725 1 0683 3305 RtFXD COMP 33 OHM 5 1 4W 01121 8 3305 3 0683 3315 RIFXD COMP 330 OHM 5 1 44 01121 3315 1 0683 3615 RIFXD COMP 360 OHMS 5 174W 01121 3615 1 0683 3915 R FXD COMP 390 OHM 5 1 w 01121 CB 3915 2 0683 3925 RIFXD COMP 3900 OHM 5 1 44 01121 3925 1 0683 4305 RIFXD COMP 43 OHM 5 25 01121 4305 5 0683 4315 RIFXD COMP 430 OHM 5 1 lw 01121 CB 4315 2 0683 4725 COMP 4700 OHMS 5 1 4W 01121 CB 4725 2 0683 5115 RIFXD COMP 510 OHM 5 1 w 01121 CB 5115 5 0683 5125 R FXD COMP 5100 OHM 5 1 4W 01121 CB 5125 1 0683 5625 RtFXD COMP 5600 OHM 5 1 4W 01121 CB 5625 1 0683 6205 R FXD COMP 62 OHM 5 1 48 01121 CB 6205 1 0683 6815 RIFXD COMP 680 OHMS 5 1 4W 01121 CB 6815 1 0683 7515 R FXD COMP 750 OHM 5 1 w 01121 CB 7515 1 See list of abbreviations in introduction to this section 01874 2 6 5 HP 5253 Frequency Converter max Section VI Table 6 2 Model 5253B Table 6 2 Replaceable Parts Cont d
37. 6 1 Change Ai from 05253 6007 to 5253A 65A Replace schematic with Figure IA 1 Replace 1 portion of parts list with Table IA 1 01874 3 IA 1 HP 5253 Frequency Converter max Model 5253B 1 0 88200 VE Qu TX2 1131 43 AQ LHOIMAGOD AHO19V4 LV 0 NOI1V1N3INO ALIUYIOG AN3 0238 d31S 79 6 5 31871 335 9N1100H5318n0u1 SLNIOd 1531 u AN3NOdWOD 03123735 AHO12V4 531 210 1 30 9SIH31SV 2 LIVM 1 SHOLSIS3U SOY8V303id NI 3ONYIIOVdYO SAHO 32891515634 1 3SIMu3H10 65318171 53100 ov v xiasua zv iv xida SNOI1VNDIS30 JJNJY J434 NIHLIM SNOLLYNSISSO 32N3H 30H1N02 1020 E ALIAYI FA 72 80123136 1 ae 1 p S9NINUYW A1luv Od 4007 009 92260 NOIAVNOIS3Q Q31v2IQNI CY inaino Xi438d SV FV NOLLVNOIS3O Be 368 00 NOILYNSIS3d a 30010 a 4315 2V ec us 1 14 03 303 O1 031VIA3888V 18 355 8 001 46 0 anang 9100 9161 19970081 310 8834 zu mas au Appendix 004 AJUAN Q 00 1061 80123130 9NIJ313N NOI1VN5IS3Q Q31v2IQNI OL Xid3ud SY IV NOLLYNOISAD 007 NOIIVN IS3O 3131dW02 wuO4 01 O31viA34Q8Y 3uv ASSY u3l4l idMv 3434 1609 0581 440102
38. 7 MV RMS General check of low pass filter section y 9 3 VDC Checks bias and amplification of 103 and A1Q4 360 MV RMS 7 1 VDC X 300 MV RMS Checks operation of 105 0 VDC Xx 190 MV RMS Checks operation of limiter A1CR1 Yar 0 MV DC WHEN METER READS AT LEFT END OF SCALE 50 MV DC WHEN METER READS FULL SCALE 15 MV DC WHEN TEST POINT 12 IS 100 MV RMS AND METER READS AT RED GREEN BORDER Checks accuracy of meter circuit in relation to output to counter 5 2 01874 2 HP 5253 Frequency Converter max Model 5253B 5 12 PRINTED CIRCUIT COMPONENT REPLACEMENT 5 13 Component lead holes in the Model 5253B circuit boards have plated walls to insure good elec trical contact between conductors on the opposite sides of the board To prevent damage tothis plating andalso to the replacement component apply heat sparingly and work carefully The following replacement pro cedure is recommended a Remove defective component b Melt solder in component lead holes Use clean dry soldering iron to remove excess solder Clean holes with toothpick or wooden splinter Do not use metal tool for cleaning as this may damage the through hole plating Bend leads of replacement component to the correct shape and insert component leads in component lead holes Using heat and solder sparingly solder leads in place Heat may be applied to either side of board as is convenient A heat sink long nose pli
39. 89 General Instrument Corp Semiconductor Div Newark N J 72758 Girard Hopkins Oakland Calif 72765 Drake Mfg Co Chicago Il 72825 HughH Eby Inc Philadelphia 72928 Gudeman Co Chicago Ili 72964 Robert M Hadley Co Los Angeles Calif 72982 Erie Resistor Corp Erie 73061 Hansen Mfg Co Inc Princeton ind 73076 H M Harper Co Chicago 111 73138 Helipot Div of Beckman Instruments Inc Galley 3 Hewlett Packard Code List HP 5253 Frequency Converter max Fullerton Calif Code No 73293 73445 73490 73506 73559 73682 73734 73743 73793 73846 73899 73905 74276 74455 74861 74868 74970 75042 75173 75378 75382 75818 75915 76005 76210 76433 76487 76493 76530 76545 76854 77068 77075 77221 77250 77252 77342 77830 77638 71164 77963 78189 78283 78230 78452 18471 78488 78493 78553 78790 78947 79142 19251 79727 79963 80031 80120 80130 80131 80207 80223 80248 80294 80411 80486 80509 80583 80640 81030 81073 81095 81312 From ave been arbitrarily assigned to suppliers not appearing in the H4 handbooks Manufacturer Address Hughes Products Division of Hughes Aircraft Co Newport Beach Calif Amperex Electronic Co Div of North American Phillips Go Inc Hicksville N Y Beckman Helipot Corp So Pasadena Calif Bradley Semiconductor Corp Hamden Conn Carling Electric Inc Hastford Conn George K Garrett Co
40. 901 0040 DIODE SILICON L1 9140 0118 COIL FXD 500 UH 5 12 9140 0118 COIL FXD 500 UH 5 A1L3 9140 0126 COIL VAR 1 76 4 02 ALLU 9140 0125 COIL VAR 0 09 1 9 UNY ALLS 9140 0111 COILSFAD RF 3 3UHY 101 1850 0091 TRANSISTOR GERMANIUM 2N2048 PNP A1Q2 1850 0091 TRANSISTOR GERMANIUM 2N2048 PNP A103 1850 0091 TRANSISTOR GERMANIUM 2N2048 PNP 10 1850 0091 TRANSISTOR GERMANIUM 2 204848 PNP 1 1 0683 7525 RSFXD COMP 7500 OHMS 5 1 4W AIR2 0683 1225 RIFXO 1200 OHM 5 1 4W A1R3 0683 1225 RIFXD 1200 OHM 5 1 uW A1RU 0683 3305 RIFXD COMP 33 OHMS 5 1 u W 165 0683 1225 RIFXD COMP 1200 OHMS 5X 1 4W A1R6 0683 3615 RIFXD COMP 360 OHMS 5 1 4W ALR 0683 1025 RtFXD COMP 1000 OHMS 5 1 4W A1R8 0684 2701 RIFXD 27 OHM 10 174 W A1R9 0684 1511 RtFXD COMP 15K OHMS 10 1 u W 1810 0683 2225 RIFXD 2 2 OHM 5 1 4W A1R11 0683 4725 RIFXD COMP 4700 OHMS 5 1 4W A1R12 0683 4725 RIFX COMP 4700 OHMS 5 1 4W A1R13 0683 6815 RIFXD COMP 680 OHMS 5X 1 uW AIRLG 0683 5115 RIFXD COMP 510 OHMS 5 1 4W A1R15 0683 3915 RIFXD COMP 390 OHMS 5 1 44 A1R16 0683 1025 R sFXD COMP 1000 OHMS 5 1 4W A1R17 0683 1225 RIFXO 1200 OHM 5 1 40 A1R1B 0684 1041 RIFXD 100 K OHM 10 1 4 W A1R19 0683 8205 RIFXD COMP 82 OHMS 5 i 4W See list of abbreviations in introduction to this section 01874 2 IA 3 HP 5253 Frequency Converter max Model 5253B APPENDIX 1 INTRODUCTION 2 The 5253A is basically the same as the 5253B except for frequency ran
41. 96501 97464 97539 97966 97979 98141 98159 Manufacturer s Code cont d Manufacturer Address G V Contrals Insuline Van Norman Ind Inc Electronic Division Manchester N H General Cable Corp Bayonne N J Raytheon Mfg Co Industrial Components Div Receiving Tube Operation Quincy Mass Raytheon Mfg Co Semiconductor California Street Plant Newton Mass Scientific Radio Products Inc Livingston N J Loveland Colo Tung Sol Electric Inc Newark N J Curtiss Wright Corp Electronics Div East Paterson N J Southca Div of Chester Corp Lester Pa Tru Ohm Prod Div of Model Engineering and Mfg Co Chicago Ili Wire Cloth Products Inc Chicago Ill Worcester Pressed Aluminum Corp Worcester Mass Philbrick Researchers inc Boston Mass Allies Products Corp Miami Fla Continental Connector Corp Woodside N Y Leecraft Mfg Co Inc New York N Y Lerco Electronics Inc National Coil Co Vitramon Inc Burbank Calif Sheridan Wyo Bridgeport Conn Gordas Corp Bloomfieid N J Methode Mfg Co Chicago III Dage Electric Co Inc Franklin Ind Weckesser Co Chicago IH Huggins Laboratories Sunnyvale Calif Hi Q Division of Aerovox Olean N Y Thordarson Meissner Div of Maguire Industries Inc Mt Carmel Solar Manufacturing Co Los Angeles Calif Carlton Screw Co Chicago 111 Microwave Associates Inc Excel Transformer Industrial Re
42. A The Scientific Instrument Company Ld 6 Tej Bahadur Sapru Road Allahabad 1 Tel 2451 The Scientific Instrument Company Ld 240 Dr Dadabhai Naoroji Rd Bombay 1 Tel 26 2642 The Scientific Instrument Company Ld 11 Esplanade East Calcutta 1 Tel 23 4129 The Scientific Instrument Company Ld 30 Mount Road Madras 2 Tel 86339 The Scientific Instrument Company Ld B 7 Ajmeri Gate Extn New Delhi 1 Tel 271053 IRAN Telecom Ltd P O Box 1812 Tehran Tel 43850 ISRAEL Electronics amp Engineering Ltd 16 Kremenetski St Tel Aviv Tel 35021 2 3 ITALY Hewlett Packard Italiana S p A Viale Lunigiana 46 Milan Tel 69 15 84 5 6 Hewlett Packard italiana S p A Palazzo Italia Piazza Marconi 25 Roma Eur Tel 59 12 544 5 JAPAN Yokogawa Hewlett Packard Ltd 2270 Ishikawa cho Hachioji Tokyo Tel Hachioji 0426 3 1231 19 lines Yokogawa Hewlett Packard Ltd No 3 6 chome Aoyama Kitamachi Akasaka Minato ku Tokyo Tel 403 6511 Yokogawa Hewlett Packard Ltd No 8 Umeda Kita ku Osaka Tel 313 0091 Yokogawa Hewlett Packard Ltd No 4 3 chome Himeikedori Chigusa ku Nagoya Tel 751 8545 KOREA American Trading Company Korea Ltd 112 35 Sokong Dong Jung ku Seoul Box 1103 Seoul Tel 3 7049 3 7613 NETHERLANDS Hewlett Packard Benelux N V 23 Burg Roellstraat Amsterdam W Tel 020 13 28 98 and 13 54 99 NEW ZEALAND Sample Electronics N Z Ltd 8 Matipo Street Onehunga S E 5
43. CA 100 PF 2 300 vOCW 04062 DM15F101G 300V 1 0140 0189 C FXD MICA 5825 PF 2 300 VDCW 04062 DM20F5825G 1 0140 0191 MICA 56 PF 5 300 VDCW 04062 ROM15E560J3C 2 0140 0192 MICA 68PF 5 300VDCW 04062 RDM15E680J3C 1 0140 0193 C FXD MICA 82 PF 5 300 VDCW 04062 DM15EB20J 300V 1 0140 0194 C FXD MICA 110 PF 5 300 VDCW 04062 ROM1SF111J3C 1 0140 0200 C FXD MICA 390PF 5 300VDCW 04062 ROM15F391J3C 1 0140 0203 CIFXD MICA 5 500VDCW 04062 DM15E300J 500V 1 0140 0204 CiFXD 47PF 5 NPO 500 VDCW 04062 DM15E870J 1 0140 0214 MICA 60PF 5 300VDEW 04062 ROM15E600J3C 1 0150 0050 C FXD CER 100 600 VOCW 84811 E 1 0150 0061 C FXD CER 20 PF 100 VOCW 56289 53Cu7 1 0150 0093 CER 0 010 80 20 100VDCW 91418 1 0150 0121 CtFXD CER O 1UF 80 20 5OVDCW 56289 5C50A 3 0160 0127 CtFxD CER LUF 20 25VDCW 56289 5C13 14 0160 0128 C FXD CER 2 20 20 25VDCW 56289 5C15 1 0160 0137 C FXD CER O 33UF 20 25VDCW 56289 5 10 3 0160 0161 CtFXD MY 0 01 UF 10 200VDCW 28480 0160 0161 1 0160 0178 C FXD MICA 27PF 5 500VDCW 04062 ROM15E270J3S 1 0160 0332 C FXD MICA 133PF 1 28480 0160 0332 1 0170 0040 MY O 7 UF 10 200VDCW 28480 0170 0040 1 0170 0098 MY O Ou7UF 20 50VOCW 88811 602 1 0180 0100 CsFXD ELECT TA 4e7UF 10 35VDCW 56289 1500475X90358B2 2 0683 1025 COMP 1000 OHM 5 174W 01121 CB 1025 5 0683 1225 RIFXD 1200 OHM 5 1 4W 01121 EB1225 41 0683 131
44. CE DESIGNATIONS NO PREFIX PREFIX Al PREFIX A2 PREFIX PREFIX A4 REFERENCE DESIGNATIONS WITHIN THIS ASSEMBLY ARE ABBREVIATED ADD ASSEMBLY DESIGNATION AS PREFIX TO FORM COMPLETE DESIGNATION NOTES UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS CAPACITANCE PICOFARADS 2 ASTERISK X INDICATES FACTORY SELECTED COMPONENT 3 TEST POINTS FOR TROUBLESHOOTING SEE TABLE 5 3 4 STEP RECOVERY DIODE POLARITY ORIENTATION DETERMINED AT FACTORY COPYRIGHT 1965 BY HEWLETT PACKARD COMPANY 05253 0 1 Figure 5 5 Schematic Diagram 5 9 5 10 HP 5253 Frequency Converter max Model 5253B Section VI Paragraphs 6 1 to 6 4 SECTION VI REPLACEABLE PARTS 6 1 INTRODUCTION 6 2 This section contains information for ordering replacement parts Table 6 1 lists parts in alpha numerical order of their reference designators and indicates the description and stock number of each part together with any applicable notes Table 6 2 lists parts in alpha numerical order of their stock number and provides the following information on 6 3 Miscellaneous parts are listed at the end of Table 6 1 6 4 ORDERING INFORMATION 6 5 To obtain replacement parts address order or inquiry to your local Hewlett Packard Field Office see lists at rear of this manual for addresses Identify parts by their Hewlett Packard stock numbers each part a Description of the part see list of abbreviations below b Typical
45. Cleveland Ohio Crystal Lake Ill No Hollywood Calif San Francisco Calif South Pasadena Calif Chicago ill Tool Works Eigin Signal Indicator Corp New York N Y Struthers Dunn inc Pitman N J Thompson Bremer amp Co Chicago IN Tilley Mfg Co Stackpole Carbon Co Standard Thomson Corp Tinnerman Products Inc Transformer Engineers Ucinite Co Veeder Root Inc Wenco Mfg Co Continental Wirt Electronics Corp Philadelphia Pa New Rochelle N Y San Francisco Calif St Marys Pa Waltham Mass Cleveland Ohio Pasadena Calif Newtonville Mass Hartford Conn Chicago Il Zierick Mfg Corp Mepco Division of Sessions Clock Co Morristown N J Schnitzer Alloy Products Elizabeth N J Times Facsimile Corp New York N Y Electronic Industries Association Any brand tube meeting EIA standards Washington D C Unimax Switch Div of W L Maxson Corp United Transformer Corp Oxford Electric Corp Bourns Laboratories Inc Acro Div of Robertshaw Fulton Controls Co All Star Products Inc Avery Adhesive Label Corp Hammerlund Co Inc Stevens Arnold Co Inc Wallingford Conn New York N Y Chicago Ill Riverside Calif Columbus 16 Ohio Defiance Ohio Monrovia Calif New York N Y Boston Mass International Instruments Inc New Haven Conn Grayhill Co LaGrange Triad Transformer Corp Venice Calif Winchester Electronics Co Inc Norwalk Conn
46. ETER IO MC HARMONIC COUNTER GENERATOR HARMONIC SELECTOR CAVITY MIXING FREQ SELECTOR 05253 8 4 Figure 4 1 Block Diagram INPUT FROM COUNTER ARI NT S I 05253 8 5 Figure 4 2 Harmonic Generator A2 A3 4 0 01874 1 HP 5253 Frequency Converter max Model 5253B Section IV Paragraphs 4 1 to 4 6 SECTION IV PRINCIPLES OF OPERATION 4 1 GENERAL 4 2 The Model 5253B is a heterodyne frequency converter designed to extend the range of frequency measurement of the Model 5243L and 5245L Elec tronic Counters to 512 Mc 4 3 The converter contains four basic functional sections harmonic generator harmonic selector cavity mixer and video amplifier see Figure 4 1 4 4 In normal operation the harmonic generator produces all of the harmonics of 10 Mc between 50 and 500 Mc The harmonic selector cavity is tuned to select one of these harmonics to be supplied to the mixer The mixer output is the difference frequency produced by the mixing of the INPUT frequency and the frequency supplied by the harmonic selector cavity This difference frequency is amplified by the video amplifier and supplied to the counter input circuit A low pass filter within the video amplifier prevents all difference frequency signals above approximately 12 Mc from reaching the counter input circuit The output of the video amplifier is monitored by a meter circuit which indicates when difference frequency out put am
47. Eee ze A2 STEP RECOVERY DIODE ASSEMBLY OUTPUT QI R m 05253 6003 LOOPS C6 56 R3 c22 5 3 1 390 1 550 lI 1000 TO I5K I Ri l 21 HARMONIC SELECTOR We ie eee CAVITY REFERENCE DESIGNATIONS WITHIN HARMONIC GENERATOR ASSY ARE 15V ABBREVIATED TO FORM COMPLETE DESIGNATION ADD ASSEMBLY DESIGNATION A3 AS PREFIX TO INDICATED DESIGNATION DEO AMPLIFIER ASSEMBLY 05253 6007 REFERENCE DESIGNATIONS WITHIN THIS ASSEMBLY ARE ABBREVIATED ADD ASSEMBLY DESIGNATION AS PREFIX TO FORM COMPLETE DESIGNATION c 4 14 LO d a CIO v9 27 60 CR3 3 5 4 j 2 4 1 2 Mi LEVEL i ima INDICATOR METER c9 6 R20 133 Our 243 12 5253 Frequency Converter max Section V Figure 5 5 Provence ae CCT Tore R21 5600 BALUN r3 J Z m i 1 t p p D l Re EI E2 272 n FERRITE RINGS FR OPE SEMBLY 52534 658 m REFERENCE DESIGNATIONS WITHIN MIXER ASSEMBLY ARE I men ne 5 ABBREVIATED TO FORM COMPLETE DESIGNATION ADD ASSEMBLY c5 A2 STEP RECOVERY E DESIGNATION A4 AS PREFIX TO E DIODE ASSEMBLY OUTPUT 7 INDICATED DESIGNATION 05253 6003 LOOPS POLARITY cl MARKINGS CE DESIGNATIONS WITHIN GENERATOR ASSY ARE MIXING TED TO FORM COMPLETE FREQUENCY TION ADD ASSEMBLY CONTROL TION A3 AS PREFIX TO D DESIGNATION E BARMONI UPS EA ame REFEREN
48. Generator to converter IN PUT and set to 472 Mc CW at 100 mv c Connect RF Millivoltmeter to Test Point 12 see Figure 5 4 d Set converter mixing frequency control to 470 Mc and tune for maximum reading on RF Millivolt meter e Vary output of VHF Signal Generator to make con verterlevelindicator meter read at red green border Model 5253B f Using plastic tuning tool tune A3C5 see Fig ure 5 2 for maximum reading on RF Millivoltmeter Tune A3C5 through hole in harmonic generator assem bly shield cover 5 22 LOW PASS FILTER ADJUSTMENT 5 23 To adjust the low pass filter in the video amplifier assembly proceed as follows a Remove converter from counter and reconnect to counter with Extension Cable 10506 b Connect VHF Signal Generatorto converter IN PUT and set to 110 Mc CW at 50 mv c Connect RF Millivoltmeter to Test Point 12 see Figures 5 4 and 5 5 d Set converter mixing frequency controlto 100 Mc and tune for maximum reading on RF Millivoltmeter e Set Signal Generator to 116 2 Mc CW at 1 v f Using plastic tool adjust variable inductor A1L4 see Figures 5 1 and 5 5 for minimum reading of RF Millivoltmeter g Set Signal Generator to 120 2 Mc at 1 v h Using plastic tool adjust variable inductor A1L3 see Figures 5 1and 5 5 for minimum reading of RF Millivoltmeter i Set Signal Generator to 115 Me CW at 1 v j Reading of RF Millivoltmeter should be less than
49. H PREPARATION FOR USE 2 1 2 1 Unpacking and Mechanical Inspection 2 1 2 3 Electrical Inspection 2 1 2 5 Storage and Reshipment 2 1 2 8 Installation 2 1 2 11 Power Requirements 2 1 2 13 Electrical Connections 2 1 HI OPERATION 25845 ala w w ee 3 1 Front Panel E 3 1 3 3 Maximum Input Voltages re 3 5 Operating Procedures 3 1 3 6 Normal Range Measurements 3 1 3 8 Extended Range Measurements 3 1 3 12 Double Checking Frequency IV ii Measurement Result 3 1 3 14 Aid to Rapid Tuning es s e 3 3 1 1 PRINCIPLES OF OPERATION 4 4 1 General u 2 a NU 4 4 5 Harmonic Generator A2 Harmonic Selector 4 1 4 7 Mixer A4 4 2 4 9 Video Amplifier 1 4 2 4 11 Level Indicator Meter 4 2 2 5 1 5 1 General os e 8 1 5 2 Introduction ea 9 1 5 4 Periodic Maintenance 9 1 5 6 Test Equipment 5 1 5 8 Troubleshooting 9 1 Model 5253B Section Page V MAINTENANCE cont d 5 10 Repair and Replacement 5 1 5 12 Printed Circuit Component Replacement 5 3 5 14 Video Amplifier Assembly ade Replacement 5 3 5 16 Mixer Diode Replacement
50. ISHED 10503A AC 16K Cable 4 ft long male BNC connectors When installed in Hewlett Packard Model 5243L or Model 5245L Electronic Counter 01874 1 1 HP 5253 Frequency Converter max Appendix II Figure 1 2 HEWLETT P PACKARD Mode1 5253B J HOLD FFEQUENCY CONVERTER MODEL 100 500 MC 52434 ELECTRONIC COUNTER SIGNAL INPUT TIME BASE B GATE Dc SENSITIVITY VOLTS RMS 4 50 MAX 55 EXT c MMC Turn SAMPLE RATE control slightly out of POWER OFF position Set SENSITIVITY to PLUG IN Set TIME BASE to 1 ms Set FUNCTION to FREQUENCY Connect signalwhose frequency is to be meas ured to INPUT of converter Set mixing frequency control to read slightly less than 100 mc FUNCTION FREQUENCY AVERAGE MANUAL START TIME INT Slowly turn mixing frequency control counter clockwise until level indicator meter first reaches a maximum reading in the green por tion of its scale Add counter display inmc to mixing frequency control reading for frequency of INPUT signal TIME BASE setting may vary depending on desired resolution of INPUT signal frequency See table 3 1 Figure HA 1 Frequency Measurement Procedure 01874 1 HP 5253 Frequency Converter max Model 5253B HA 13 88 TO 512 MC AMPLITUDE LESS THAN 50 MV RMS The front panel level indicator meter indi cates in the green portion of its scale
51. MONIC GENERATOR ASSEMBLY HIDDEN C22 A2CRI A3C4 A3C5 6 A2EI wae PX CAUTION DAMAGE TO COUNTER WILL RESULT IF THIS POINT IS GROUNDED Figure 5 Left Side View 01874 1 7 HP 5253 Frequency Converter max Appendix I Model 5253B A4Cl A4CRIB A4CR2 A4R7 485 485 A4C2 A4R6 R2i Cel A4 MIXER ASSEMBLY HARMONIC SELECTOR CAVITY A4R2 AGRI E2 El A4C3 411 A4CRIA A4R4 vow PA Figure IIA 6 Right Side View HA 8 01874 1 HP 5253 Frequency Converter max Appendix II Model 5253B d r gt m Lu o lt VIDIO AMPLIFIER Figure 7 Top View Test Points HA 9 01874 1 HP 5253 Frequency Converter max Appendix I Model 5253B Table IIA 2 Troubleshooting Procedure All voltages given are approximate and may vary from instrument to instrument because of variations in com ponent characteristics TEST EQUIPMENT Model 411A RF Millivoltmeter with 11022A formerly 411A 21B Pen Type Probe Tip 00 Model 412A DC VTVM ES COUNTEN See counter manual for self check procedure Extension cable available from 00 see parts list CONNECT 25253A TO COUNTER WITH EXTEN SION CABLE 210506A formerly AC 16Y Checks power supplied to plug in from counter see counter manual for power supply adjustment procedure Checks generator diode drive Voltages vary widely because of both the detuning effect of volt meter pro
52. Mc Counter should display approximately 10 Mc d Connect RF Millivoltmeter to Test Point 13 Vary output of VHF Signal Generator for RF Milli voltmeter reading of 100 mv Note output level of VHF Signal Generator e Set VHF Signal Generator to 115 Mc at same output level as noted in step d above Converter out put to counter as shown on RF Millivoltmeter should not exceed 50 mv If converter output to coun ter is greater than 50 mv see Paragraph IIA 20 for low pass filter adjustment procedure 5 HP 5253 Frequency Converter max Appendix II 29 IN CABINET PERFORMANCE CHECK a Turn counter power off and install converter b Set VHF Signal Generator to 102Mc CW at 50 mv and connect to INPUT of converter 03 RI2 RI4 CII RIO 2 RI8 6 NOTE PREFIX ALL DESIGNATIONS Al RI9 Model 5253B Set controls as shown in Figure 1 Counter should display approximately 2 Mc d Set VHF Signal Generator to any frequency be tween 88 Mc and 512 Mc with output of 50 mv Coun ter should display correct frequency atany frequency within this range c9 c7 C2 C5 R7 TN WO 12 w VA VOU 4 li go Ei q VE TA J 2 ay em fe m 4 R9 14 CIO C3 C8 L3 LI R8 C6 L2 Figure IIA 4 Model 5253A Top View 01874 1 HP 5253 Frequency Converter max Model 5253B Appendix II A3CI A3LI A3RI A3R2 A3C3 A3C2 HAR
53. OIL FXD RF 2 2 UH 28480 9140 0142 1 9140 0143 COILIFXD RF 3 3 UH 28480 9140 0143 1 9140 0170 COIL FXD 15 UH 20 350 78526 11503 1 9170 0029 CORE FERRITE BEAD 02114 56 590 65 4A 2 9170 0059 MAGNETIC CORE TOROID FERRITE 02114 396T125 303 3 05253 2007 BOARDIBLANK AMPLIFIER 28480 05253 2007 1 05253 6003 ASSY1STEP RECOVERY DIODE 28480 05253 6003 1 05253 6007 ASSYtAMPLIFIER 28480 05253 6007 1 52534 658 ASSYIHARMONIC GENERATOR 28480 5253A 658 1 5253A 65C ASSYIMIXER 28480 52534 65 1 05251 0002 BRACKET METER 28480 05251 0002 1 05253 0005 PLATE BOTTOM 28480 05255 0005 1 05253 0006 BRACKET PANEL 28480 05255 0006 1 05253 2014 PANEL FRONT 28480 05253 2014 1 See list of abbreviations in introduction to this section oe 01874 3 HP 5253 Frequency Converter max Model 5253B Table 6 3 Manufacturer s Code Section VI Table 6 3 The following code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks H4 1 Name to Code and H4 2 Code to Name and their latest rpm The date of revision and the date of the supplements used appear at the bottom of each page Alphabetical codes Code No 00000 90136 00213 00334 00335 00373 00656 00779 00781 00815 00853 00866 00891 01121 01255 01281 01295 01349 01561 01589 01930 01961 02114 02286 02660 02735 02771 02777 03508 03705 03797 03877 03888 03954 04009 04013 04062 04222 04298 04354 04404 04651 0471
54. S W Pty Ltd 4 Grose Street Glebe N S W Tel 69 6338 6 lines AUSTRIA UNILABOR H m b H Wissenschaftliche Instrumente Rummelhardtgasse 6 3 0 Box 33 Vienna 1 71 Tel 4261 81 BELGIUM Hewlett Packard Benelux 20 24 Rue de Hopital Brussels 1 Tel 11 22 20 BRAZIL Ciental importacao e Comercio Ltda R Des Eliseu Guilherme 62 Sao Paulo 6 Tel 32 4332 CHILE Hector Calcagni Casilla 13942 Santiago Tel 6 42 26 COLOMBIA Instrumentacion Henrik A Langebeck amp Cia Ltda Apartado Aereo 6287 Bogota 1 D E Tel 45 78 06 Cable AARIS Bogota DENMARK Tage Olsen A S Ronnegade 1 Copenhagen 0 Tel 29 48 00 FINLAND INTO 0 Y 0 Box 153 11 Meritullinkatu Helsinki Tel 6 11 33 FRANCE Hewlett Packard France 150 Blvd Massena Paris 13e Tei 707 97 19 GERMANY Hewlett Packard VgmbH Steindamm 35 Hamburg 1 Tel 24 05 51 Hewlett Packard VgmbH Kurhessenstrasse 95 Frankfurt a Main Tel 52 00 36 Hewlett Packard VgmbH Reginfriedstrasse 13 Munich 9 Tel 49 51 21 2 Hewlett Packard VgmbH Technisches Buro Herrenbergerstrasse 110 703 Boblingen Wurttemberg Tel 6971 Hewlett Packard VgmbH Lietzenburger Strasse 30 1000 Berlin 30 Tel 24 92 71 IN EUROPE Hewlett Packard S A 54 Route des Acacias Geneva Switzerland Telephone 022 42 81 50 Telex 2 24 86 Cable HEWPACKSA Instrument Sales GREECE K Karayannis Klaftmonos Square Athens 124 Tel 230 301 INDI
55. S30 39N3H343u o0t Zv 9100 0161 ves vesze A THINSSSV YaIldITdWV IV m 28 001 ee 0021 119 65 22 vH H 1 an 0001 15002056 I ost 55 23 10 AN 455 B 9 82 u nn 0064 2 2 440109 OW 21 ay ZU 0022 YN will 6694 1609 0681 20 0921 s 95 6 09 0021 Aner 22 ans aa eee 2 Hn00S HNOOS 2 13892 26 11 le z E 099 veszs ATAWASSV 12H swa AZ 6 UraNva ANDA d 288 iagram D 1C Schemati 8 Figure 11 01874 1 HP 5253 Frequency Converter max Appendix II Model 5253B Table IIA 3 Reference Designation Index ee Stock No Description 5253A 65A ASSY VIDEO AMPLIFIER 0160 0127 C FXD CER 1 0 UF 20 25VDCW 0160 0127 C FXD CER 1 0 UF 20 25VDCW 0180 0100 C FXD ELECT TA 4 7 UF 10 359DCW 0160 0137 C FXD CER 0 33 UF 20 25VDCW 0160 0127 C FXD CER 1 0 UF 20 25VDCW 0160 0137 C FXD CER 0 55 UF 20 25VDCW 0140 0176 C FXD MICA 100 PF 2 300VDCW 0140 0203 C FXD MICA 30 PF 5 500VDCW 0140 0193 MICA 82 PF 5 300VDCW 0140 0191 C FXD MICA 56 PF 5 300VDCW 0140 0204 C FXD MICA PF 5 NPO 500VDCW 0150 0121 C FXD CER 0 1 UF 80 20 50VDCW 0160 0127 C FXD CER 1 0 UF 20 25VDCW 0160 0127 C FXD CER 1 0 UF 20 25VDCW 0140
56. Wakefield Mass Pyrofilm Resistor Co Morristown J Air Marine Motors Inc Los Angeles Calif Atrow Hart and Hegeman Elect Co Hartford Conn Lambertville N J New York N Y Myrtle Beach C Dallas Texas Alliance Ohio Indianapolis ind Van Nuys Calif Rockford IH Santa Clara Calif Saugerties Taurus Corp Elmenco Products Co Hi Q Division of Aerovox Elgin National Watch Co Electronics Division Burbank Calif Precision Paper Tube Co Chicago Il Dymec Division of Hewlett Packard Co Palo Alto Calif Sylvania Electric Prods Inc Electronic Tube Div Mountain View Calif Motorola Inc Semiconductor Prod Div Phoenix Arizona Filtron Co Inc Western Div Culver City Calif Automatic Electric Co Northlake ill Automatic Electric Sales Corp Northlake HI Sequoia Wire amp Cable Co Redwood City Calif Precision Coil Spring Co El Monte Calif P M Motor Company Chicago 44 Twentieth Century Plastics Inc Los Angeles Calif Westinghouse Electric Corp Semi Conductor Dept Ultronix Inc Hlumitronic Engineering Co Cosmo Plastic c o Electrical Spec Barber Colman Co Tiffen Optical Co Roslyn Heights Long Island N Y Metropolitan Telecommunications Corp Metro Cap Division Brooklyn N Y Stewart Engineering Co Santa Cruz Calif Wakefield Engineering Inc Wakefield Mass The Bassick Co Bridgeport Conn Bausch and Lomb Optical Co Roch
57. XD R FXD R FXD R FXD R FXD R FXD R FXD R FXD Table IIA 4 5 25 PF MICA 550 PF 10 SOOVDCW MICA 820 PF 2 300VDCW MICA 100 PF 2 300VDCW MICA 5825 PF 2 300VDCW MICA 56 PF 5 300VDCW MICA 82 PF 5 500VDCW MICA 290 PF 5 500VDCW MICA 30 PF 596 500VDCW MICA 47 PF 5 NPO 500VDCW CER 1000 PF 600V0CW CER 0 01 UF 80 200 100VDCW CER 0 1 UF 480 209 50VDCW CER 1 0 UF 20 25VDCW CER 0 33 UF 20 25VDCW 0 047 UF 10 200VDCW MY 0 047 UF 20 SOVDCW ELECT 4 7 UF 10 35VDCW COMP 1000 OHM 5 1 4W COMP 1200 OHM 5 1 4W COMP 22 OHM 5 1 4W COMP 2 2K OHM 5 1 AW COMP 220K OHM 5 1 4w COMP 270 OHM 5 1 4W COMP 33 OHM 5 1 4W COMP 360 OHM 5 1 4 COMP 390 OHM 5 1 4W COMP 4700 OHM 5 1 4 COMP 510 OHM 5 1 4W COMP 5600 OHM 5 1 4W COMP 62 OHM 5 1 4W COMP 680 OHM 5 1 4W COMP 7500 OHM 5 1 4W COMP 82 OHM 5 1 4W COMP 100K OHM 10 1 4W COMP 150 OHM 10 1 AW COMP 27 OHM 10 1 4W COMP 5600 OHM 10 1 4W COMP 2400 OHM 5 1 2W CONNECTOR BNC CONNECTOR 50 MINIATURE CONNECTOR 315 CONTACTS TRANSISTOR GERMANIUM PNP 2N2048 DIODE SILICON 1N4168M MATCHED PAIR SILICON DIODE GERMANIUM 1 MICROSEC 60 WIV DIODE COIL FXD RF 4 7 UH COIL FXD RF 27 UH COIL FXD RF 3 3 UM COIL 500 j COIL VAR 0 9 1 9 UH COIL VAR 1 76 4 02 UH COIL FXD RF 2 2 UH CORE TOROID Replaceable Parts Description Mfr Mfr Part No ASSY VIDEO AMPLIFIER ASSY HARMONIC GENERATOR
58. al amplitude is adequate for accurate frequency measurement HA 7 OPERATING PROCEDURE IIA 8 NORMAL RANGE MEASUREMENTS IIA 9 Figure II 1 is the procedure to be used for measurement of frequencies from 100 1 to 512 Mc WithINPUT signal amplitudes from 50 mv to 1 v RMS 10 EXTENDED RANGE MEASUREMENTS IIA 11 The frequency of signals not within the nor mal range of 100 1 to 512 Mc 50 mv to 1 v RMS may be measured using the following procedures 12 88 TO 100 1 MC 50 MV TO 1 V RMS Per form steps 1 through 5 of Figure IIA 1 Then a Set mixing frequency control to slightly more than 110 Mc b Turn mixing frequency control slowly clockwise until level indicator meter first reaches a maximum reading in the green portion of the scale i c Subtract counter display in Mc from reading of mixing frequency control in Mc for frequency of INPUT signal Specifications RANGE As converter for 5243L or 5245L counter 88 Mc to 512 Mc using mixing frequencies of 100 Mc to 500 Me in 10 Mc steps ACCURACY Retains accuracy of 52431 5245L counter INPUT VOLTAGE RANGE 50 mv to 1 v RMS MAXIMUM INPUT 2 v RMS or 100 vde will not damage the instrument INPUT IMPEDANCE Approximately 50 ohms LEVEL INDICATOR Meter aids frequency selection indicates output voltage level to counter REGISTRATION Counter display is added tothe converter dial reading WEIGHT Net 5 1 2 lbs shipping 9 lbs ACCESSORY FURN
59. amid Electric Co Electro Cords Co Victory Engineering Corp Bendix Corp Red Bank Div Red Bank Hubbell Corp Mundelein Itl Smith Herman H Inc Brooklyn N Y Central Screw Co Chicago Ill Gavitt Wire and Cable Co Div of Amerace Corp Burraughs Corp Electronic Tube Div Eveready Battery Model Eng and Mfg Inc Loyd Scruggs Co Arco Electronis Inc A J Glesener Co Inc Brookfield Mass Plainfield N J New York N Y Huntington ind Festus Mo New York N Y San Francisco Calif Good All Electric Mfg Co Ogallala Neb Sarkes Tarzian Inc Bloomington Ind Boonton Molding Company Boonton N J A B Boyd Co San Francisco Calif 6 8 Table 6 3 Code No Manufacturer Address 85474 R M Bracamonte amp Co San Francisco Calif 85660 Koiled Kords Inc New Haven Conn 85911 Seamless Rubber Co Chicago HI 86197 Clifton Precision Products Clifton Heights Pa 86579 Precision Rubber Products Corp Dayton Ohio 86684 Radio Corp of America RCA Electron Tube Div Harrison N J 87216 Phitco Corporation Lansdale Division Lansdale Pa 87473 Western Fibrous Glass Products Co San Francisco Calif 87664 Van Waters amp Rogers Inc Seattie Wash 87930 Tower Mfg Corp Providence R 1 88140 Cutler Hammer inc Lincoln lil 88220 Gould National Batteries Inc St Paul Minn 88698 General Mills Inc Buffalo N Y 89231 Graybar Electric Oakland Calif 89462 Wa
60. be and the variable value of A3R3 DC voltage may be either or depending upon fac tory determined generator diode orientation Voltages vary widely because of diode charac teristics Voltages are 0 VDC when diode shorted and 20 VDC when diode open Voltages should be approximately equal because of matched characteristics Y 100 MV DC 100 CONNECT SIGNAL GENERATOR TO 5253 SET GENERATOR TO 102 MC CW 100 MV SET COUNTER CONTROLS AND 5253A TO MEASURE FREQUENCY OF INPUT SIGNAL This voltage is total harmonic energy output of m S MV RMS mixer and varies widely De Checks bias and amplification of A1Q1 15 MVRMS A 10 VDC 200 MV RMS YY 4voc 15 MV RMS YT 9 VDC 500 MV RMS X 8 5 VDC 300 MV RMS 0 VDC Checks operation of limiter AICR1 200 MV RMS 0 MV DC WHEN METER READS AT LEFT END OF SCALE 50 MV DC WHEN METER READS FULL 15 DC WHEN TEST POINT 13 IS 100 MV RMS AND METER READS AT RED GREEN BORDER Checks bias and amplification of 102 General check of low pass filter section Checks bias and amplification of A1Q3 Checks operation of AiQ4 Checks accuracy of meter circuit in relation to output to counter HA 10 01874 1 HP 5253 Frequency Converter max Appendix II Model 5253B AYOLIV4 LY Q3NIWu313Q0 NOILVIN3IYO ALIUYIO4 32010 AH3AOD3H d31S t 4 9 318 1 335 INILOOHSZTANONIL
61. bezelat sides of meter Push bezel forward as far as possible h Remove screws MP7 8 on top of meter bracket i Grasp meter and gently pull meter and bracket backwards out of front panel hole at the same time twisting rear of meter slightly sideways to the right and pulling up j Remove bracket and hardware from meter and install in identical manner on replacement meter Hardware which may come from the manufacturer with the replacement meter may be discarded k Place meter with bracket in unit by reversing removal procedure m Replace screws on top of meter bracket n Replace meter bezel at sides of meter HP 5253 Frequency Converter max Section V Paragraphs 5 20 to 5 23 p Check that meter terminals are not close to front bearing block Bend terminals away from block if necessary q Strip 1 4 inchinsulation from ends of each con necting wire and solder to meter terminals Black wire goes to inside terminal and white wire goes to outside terminal r Replace aluminum spacer rod Tighten oniy finger tight as excessive torque may break end of rod s Replace screw which holds spacer rod to rear support t Replace video amplifier assembly supporting bracket and all screws 5 20 HARMONIC GENERATOR ADJUSTMENT 5 21 To adjust the harmonic generator assembly proceed as follows a Remove converter from counter and reconnect to counter with Extension Cable 910506A b Connect VHF Signal
62. ce is located on the front panel of the counter To tighten turn fully LEVEL INDICATOR METER The meter cir clockwise To loosen turn fully counter cuit continuously monitors the level of the clockwise 05253 A 13 Figure 3 1 Front Panel 3 0 01874 2 HP 5253 Frequency Converter max Model 5253 A Section III Paragraphs 3 1 to 3 13 SECTION Ill OPERATION 3 1 FRONT PANEL 3 2 The functions of the front panel control meter connector and retaining screws are given in Figure 3 1 3 3 MAXIMUM INPUT VOLTAGES 3 4 Damage to the converter may result if an AC signal greater than 2 v RMS or a DC voltage greater than 100 v is applied to converter INPUT connector 3 5 OPERATING PROCEDURES 3 6 NORMAL RANGE MEASUREMENTS 3 7 Figure 3 2 is the procedure to be used for measurement of frequencies from 100 1 to 512 Mc with INPUT signalamplitudes from 50 mv to 1v RMS 3 8 EXTENDED RANGE MEASUREMENTS 3 9 The frequency of signals not within the normal range of 100 1 to 512Mc 50 mv to 1v RMS may be measured using the following procedures 3 10 88 TO 100 1 MC 50 MV TO 1 V RMS Per form steps 1 through 5 of Figure 3 2 Then a Set mixing frequency control to slightly more than 110 Mc b Turn mixingfrequency control slowly clockwise until level indicator meter first reaches a maximum reading in the green portion of its scale c Subtract counter display Mc from reading of mixing frequency control
63. d tune for maximum reading on RF Millivolt meter e Vary output of VHF Signal Generator to make converter level indicator meter read at red green border f Using plastic tuning tool tune A3C5 see Figure 5 for maximum reading on RF Millivoltmeter Tune A3C5 through hole in harmonic generator assem bly shield cover 20 LOW PASS FILTER ADJUSTMENT IIA 21 To adjust the low pass filter in the video amp lifier assembly proceed as follows a Remove converter from counter and reconnect to counter with Extension Cable 10506A b Connect VHF Signal Generator to converter IN PUT and set to 110 Mc CW at 50 mv c Connect RF Millivoltmeter to Test Point 13 see Figure IIA 7 d Set converter mixing frequency control to 100 Mc and tune for maximum reading on RF Millivoltmeter e Set Signal Generator to 118 Mc CW at 1 v f Using plastic tool adjust variable inductor AlL4 see Figure IIA 4 for minimum reading of RF Milli voltmeter g Set Signal Generator to 117 Mc CW at 1 v h Using plastic tool adjust variable inductor AlL3 see Figure IIA 4 for minimum reading of RF Milli voltmeter 1 Set Signal Generator to 115 Mc CW at 1 v j Reading of RF Millivoltmeter should be less than 100 mv If reading is above 100 mv troubleshoot video amplifier assembly 22 METER ADJUSTMENT a Turn counter power off remove converter from counter and reconnect to counter with Extension Cabl
64. e 10506A b Set VHF Signal Generator to 102 Mc CW at 50 mv and connect to INPUT of converter c Set counter controls as shown in Figure IIA 1 Counter should display approximately 2 Mc d Vary VHF Generator output to make level indi cator meter read at red green border 3 HP 5253 Frequency Converter max Appendix II Model 5253B LEVEL INDICATOR METER 6 INPUT LOW PASS OUTPUT FROM AN FILTER T MIXER 12 MC CUTOFF en Be ee De er In 05251 B 3 Figure IIA 2 Video Amplifier A6 PART 6 OUTPUT COUNTER INPUT FROM Q3 _ e o M ee 05251 4 Figure IIA 3 Level Indicator Meter Circuit 4 01814 1 HP 5253 Frequency Converter max Model 5253B e Using RF Millivoltmeter measure voltage at Test Point 13 Voltage should be between 100 mv 130 mv If not change value of resistor A1R19 to change voltage to between 100 mv and 130 mv If voltage is too high increase value of AIR19 IE volt age is too low decrease value of AIR19 Repeat steps d and e after changing value of AIR19 23 MECHANICAL ADJUSTMENT OF METER ZERO IIA 24 TRUE SIGNAL LEVEL INDICATION Level indicator meter is adjusted at the factory for proper mechanical zero However normal aging of meter components may change indicated zero level To in sure accuracy of input signal level indication peri odic adjustment of meter zero may be necessar
65. e the instrument INPUT IMPEDANCE Approximately 50 ohms LEVEL INDICATOR Meter aids frequency selection indicates output voltage level to counter REGISTRATION Counter display is added to the converter dial reading WEIGHT Net 5 1 2 lbs shipping 9 lbs ACCESSORY FURNISHED 10503 AC 16K Cable 4 feet long male BNC connectors When installed in Hewlett Packard Model 5243L or Model 5245L Electronic Counter 01874 1 1 1 1 2 HP 5253 Frequency Converter max Model 5253B Section II Paragraphs 2 1 to 2 14 SECTION PREPARATION FOR USE 2 1 UNPACKING AND INSPECTION 2 2 Ifthe shipping carton is damaged ask that the carrier s agent be present whenthe instrument is un packed Inspect the instrument for damage scratches dents broken knobs etc If the instrument is dam aged or fails to meet specifications notify the carrier and the nearest Hewlett Packard field office immedi ately field offices are listed at the back of this manual Retain the shipping carton and the padding material for the carrier s inspection The field office will arrange for the repair or replacement of your instrument with out waiting for the claim against the carrier tobe settled 2 3 ELECTRICAL INSPECTION 2 4 The performance check procedure Paragraph 5 31 may be used to verify proper electrical opera tion as part of an incoming quality control inspection 2 5 STORAGE AND RESHIPMENT 2 6 PACKAGING To protect
66. ers commercial heat sink tweezers etc should be used when replacing transistors and diodes in order to pre vent excessive heat from being conducted by the leads from the soldering iron to the component d Through hole plating breaks are indicated by the separation from the board of the round conductor pad on either side of the board To repair breaks press conductor pads against board and solder replacement component lead to conductor pad on both sides of the board 5 14 VIDEO AMPLIFIER ASSEMBLY REPLACEMENT 5 15 Ifvideoamplifier printed circuit board requires replacement follow this procedure a Remove the converter from counter b Unscrew and remove small screw MP1 see Figure 5 4 which holds video amplifier A1 in place Remove screws which secure supporting bracket to front panel Remove supporting bracket c Firmly grasp assembly at component free end and pull out of socket using a slight back and forth sideways movement d Check that the connecting terminals of replace ment assembly are clean Push replacement assembly firmly into socket and check for proper seating Re place supporting bracket and all screws e All replacement video amplifier assemblies are adjusted and inspected at the factory for optimum performance However if a general operational check is desired perform the in cabinet performance check given in Paragraph 5 31 5 16 MIXER DIODE REPLACEMENT 5 17 If either of the matched pai
67. erter Detailed procedures for replacement of all the in dividual components of the unit are beyond the scope of this manual In field repair is for the most part simple and straightforward However do not attempt adjustment of the gearing arrangement the harmonic selector cavity or the step recovery diode Should gear cavity or step recovery diode problems arise please contact your Hewlett Packard field office to arrange for repair Table 5 1 Recommended Test Equipment Electronic Counter RF Millivoltmeter 1 Mc to 20 Mc 10 mv to 10 vde 10 mv resolution DC VTVM and Ohmmeter 0 to 25 vdc 0 1 v resolution O to 100 M ohms Supply Power Visual Operational Indicator Circuit Adjustment Troubleshooting Circuit Adjustment Troubleshooting Model 5243L or Model 5245L Model 411A with Pen Type Probe Tip 11022A formerly 9411A 21B Model 412A VHF Signal 50 Mc to 480 Mc Circuit Adjustment Model 608C Generator 10 mv to 1 v Troubleshooting Oscilloscope 15 Mc bandwidth Circuit Adjustment Troubleshooting Model 175A with Model 1752A High Gain Amplifier and Model 1780A Aux Unit Extension Cable 50 pin straight Circuit Adjustment 10506A formerly thru connections Troubleshooting AC 16Y 01874 1 5 1 HP 5253 Frequency Converter max Section V Model 5253B Table 5 3 Table 5 3 Troubleshooting Procedure All voltages given are approximate and may vary from ins
68. ester N Y E T A Products Co of America Chicago Ill Western Devices Inc Inglewood Calif Amatom Electronic Hardware Co Inc New Rochelle N Y Beede Electrical Instrument Co Inc Penacook N H 9 5 Semcor Division of Nuclear Corp of America Phoenix Arizona Torrington Mfg Co West Div Van Nuys Calif Kelvin Electric Co Van Nuys Calif Youngwood Pa San Mateo Calif Sunnyvale Calif Cleveland Ohio Rockford IH 01874 1 Code Mo Manufacturer Address 07115 Corning Glass Works Electronic Components Dept Bradford Pa 07126 Digitran Co Pasadena Calif 07137 Transistor Electronics Corp Minneapolis Minn 07138 Westinghouse Electric Corp Electronic Tube Div Elmira N Y 07149 Filmohm Corp New York N Y 07233 Cinch Graphik Co City of Industry Calif 07261 Avnet Corp Los Angeles Calif 07263 Fairchild Semiconductor Corp Mountain View Calif 07322 Minnesota Rubber Co Minneapolis Minn 07387 The Birtcher Corp Los Angeles Calif 07700 Technical Wire Products Springfield N J 07910 Continental Device Corp Hawthorne Calif 07933 Rheem Semiconductor Corp Mountain View Calif 07966 Shockley Semi Conductor Laboratories Palo Alto Calif 07980 Boonton Radio Corp Boonton N J 08145 0 5 Engineering Co Los Angeles Calif 08289 Blinn Detbert Co Pomona Calif 08358 Burgess Battery Co Niagara Falls Ontario Canada 08717 Sloan Company Burbank Calif 08718 Cannon Electric Co Phoenix Div
69. ge The 5253 A measures from 100 to 500 Mc The 5253B measures from 50 to 500 Mc The frequency range of the 5253B was extended by changing the pick up loop in the cavity The 5353B manual will apply for most applications Appendix H covers the differences between the two models and contains the necessary information for the operation and maintenance of the 5253A HA 3 DESCRIPTION IIA 4 The Hewlett Packard Model 5253A Frequency Converter is a plug in unit which converts a Hewlett Packard Model 5243L or 5245L Electronic Counter into a direct reading counter from 88 to 512 Mc IIA 5 The stability and accuracy of the basic counter are retained by multiplying a 10 Mc signal derived from the 1 Mc internal time base of the counter to a selectable harmonic frequency between 100 and 500 Mc This known harmonic of 10 Mc is then hetero dyned with the INPUT signal If the resulting differ ence frequency is between 100 kc and 12 Mc bandwidth of amplifier in plug in it is counted and displayed by the counter The frequency of the INPUT signal is then indicated by the combination of the MIXING FREQUENCY control in megacycles front panel of plug in and the digital display of the counter in megacycles IIA 6 A front panel meter by monitoring the differ ence frequency output of the plug in to the counter Table IIA 1 Appendix II ll 5253A aids in selecting the desired MIXING FREQUENCY and also in determining if INPUT sign
70. ge Mill Road Palo Alto California OUTPUT TO VIDEO AMPLIFIER plc E CAVITY RESONATOR MIXING FREQ SELECTOR Figure 4 3 Harmonic Selector Cavity 01874 1 4 1 HP 5253 Frequency Converter max Section IV Paragraphs 4 7 to 4 12 4 7 MIXER 4 4 8 Matched diodes are used in a balanced mixer circuit in order to minimize the generation of even order harmonics of both the INPUT signal and the selected mixing frequency The balanced input signal required by the circuit is accomplished by grounding the junction of the two resistors of equal value A4R1 and A4R2 and installing ferrite rings El E2 and E3 around the input coaxial cable see Figure 4 4 Both sides of resistor A4R1 are returned to common for DC currents However for AC currents in the fre quency range of 50 to 512 Mc the impedance of the input signal path is large due to the inductance pro vided by the ferrite rings E1 E2 and E3 causing a balanced AC signal condition at the mixer diodes Limiting diode A4CR2 prevents INPUT signals of high amplitude from overloading the mixer circuit The output of the mixer diodes during normal operation when the converter is properly tuned is a complex signal containing the INPUT signal frequency the frequency of the harmonic of 10 Mc to which the har monic selector cavity is tuned the frequency that is the sum of these two frequencies and the frequency that is the difference between these two frequencies
71. in search of anun known INPUT frequency set counter FUNCTION con trol to MANUAL START This allows the counter to 155 000 MC 150 030 MC Section IH Paragraphs 3 14 to 3 15 totalize each cycle of any difference frequency pro duced during rapid tuning When counter display changes indicating that the MIXING FREQUENCY is heterodyning with the INPUT frequency and producing a difference frequency within the frequency range of the basic counter set counter FUNCTION control to FREQUENCY and proceed with measurement DIFFERENCE FREQUENCY 15 IS ABOVE PASS BAND OF VIDEO AMPLI FIER ASSEMBLY 00000000 150 000 MC 00005000 5 000 MC 155 000 MC 160 000 MC 00005000 5 000 MC 155 000 MC 140 000 MC 10 030 MC 00010030 150 030 MC DIFFERENCE FREQUENCY OF 30 KC IS BELOW PASS BAND OF VIDEO AMPLI FIER ASSEMBLY 00000000 160 000 MC 00009970 9 970 MC 150 030 MC DIFFERENCE FREQUENCY OF 32 MC IS ABOVE PASS BAND OF VIDEO AMPLI FIER ASSEMBLY 00000000 DIFFERENCE FREQUENCY OF 22 MC IS ABOVE PASS 512 000 MC 00000000 LOIS Gi NIRS AMPLIS FIER ASSEMBLY 500 000 MC 00012000 12 000 MC 512 000 MC 05253 A 1I Figure 3 3 Typical Frequency Measurements 3 3 01874 2 HP 5253 Frequency Converter max Section IV Model 5253B Figures 4 1 and 4 2 OO KC lt ee lt 12 f AMPLIFI INPUT SIGNAL Jl AND 12 MC LOW PASS FILTER OUTPUT TO COUNTER LEVEL INDICATOR M
72. l may be checked at other settings See Figure 3 3 for examples Table 3 1 Frequency Resolution INPUT SIGNAL FREQUENCY 151 1223344 Mc MIXING FREQUENCY CONTROL set to 140 Mc Time Base l Setting Counter Display Measurement Resolution no display 1 1 1 5 1 Mc 11 1 151 1 Mc 1112 11122 11122 3 11122 33 11122 334 1122 3344 151 12 Mc 151 122 Mc 151 1223 Mc 151 12233 Mc 151 122334 Mc 1511223344 Mc 01660 1 3 1 HP 5253 Frequency Converter max Section III Figure 3 2 Turn SAMPLE RATE control slightly out of POWER OFF position Set SENSITIVITY to PLUG N Set TIME BASE to 1 ms Set FUNCTION to FREQUENCY Connect signal whose frequency is to be meas ured to INPUT of converter Set mixing frequency control to read slightly less than 50 Mc Model 5253B 7 Slowly turn mixingfrequency control counter clockwise until level indicator meter first reaches a maximum reading in the green por tion of its scale Add counter display in Mc to mixing frequency control reading inMc for frequency of INPUT signal TIME BASE setting may vary depending on desired resolution of INPUT signal frequency See Table 3 1 05255 14 Figure 3 2 Frequency Measurement Procedure 01874 2 HP 5253 Frequency Converter max Model 5253B 3 14 AID TO RAPID TUNING 3 15 To easily obtain an indication of the proper MIXING FREQUENCY when rapidly tuning the Model 5253B through its frequency range
73. ldes Kohinoor Inc Cambridge Mass 89473 General Electric Distributing Corp Schenectady N Y 89636 Carter Parts Div of Economy Baler Co Chicago 111 89665 United Transformer Co Chicago IH 90179 U S Rubber Co Mechanical Goods Div Passaic N J 90970 Bearing Engineering Co San Francisco Calif 91260 Spring Mig Co San Francisco Calif 1345 Miller Dial amp Nameplate Co El Monte Catif 91418 Radio Materials Co Chicago IH 91506 Augat Brothers Inc Attleboro Mass 91637 Dale Electronics Inc Columbus Nebr 91662 Elco Corp Philadelphia Pa 91737 Gremar Mfg Co Inc Wakefield Mass 91827 K F Development Co Redwood City Calif 91929 Minneapolis Honeywell Regulator Co Microswitch Div Freeport HI 31961 Nahm Bros Spring Co Oakland Calif 92180 Tru Connector Corp Peabody Mass 92196 Universal Metal Prod Inc Bassett Puente Calif 92367 Elgeet Optical Co Inc Rochester N Y 92607 Tinsolite Insulated Wire Co Tarrytown N Y 93332 Sylvania Electric Prod Inc Semiconductor Div Woburn Mass 93369 Robbins and Myers Inc New York N Y 93410 Stevens Mfg Co Inc Mansfield Ohio 93788 Howard J Smith Inc Port Monmouth N J 00015 39 Revised February 1965 Code No 3929 93983 94137 94144 94145 94148 94154 94197 94222 94310 94330 94682 95023 95236 95238 95263 95264 95265 95275 95348 95354 95712 95987 96067 96095 96256 96296 96330 96341
74. lectronics Co Inc Brooklyn N Y 1529 Adjustable Bushing Co N Hollywood Calif 15772 Twentieth Century Coil Spring Co Santa Clara Calif 15909 The Daven Co Livingston N J 16037 Spruce Pine Mica Co Spruce Pine N C 16352 Computer Diode Corp Lodi N J 16688 De Jur Amsco Corporation Long Island City 1 N Y 16758 Delco Radio Div of G M Corp Kokomo Ind 17109 Thermonetics Inc Canoga Park Calif 1744 Tranex Company Mountain View Calif 18486 Radio Industries Des Plaines SI 18583 Curtis Instrument Inc Mt Kisco N Y 18873 DuPont and Co Inc Wilmington Del 19315 Eclipse Pioneer Div of Bendix Aviation Corp Teterboro N J 19500 Thomas A Edison Industries Div of McGraw Edison Co West Orange 19701 Electra Manufacturing Co Kansas City Mo 20183 Electronic Tube Corp Philadelphia Pa 21226 Executive Inc New Yark N Y 21520 Fansteel Metallurgical Corp No Chicago 21335 The Fafnir Bearing Co New Britain Conn 21964 Fed Telephone and Radio Corp Clifton N J 24446 General Electric Co Schenectady N Y 24455 G E Lamp Division Nela Park Cleveland Ohio 00015 39 Revised February 1965 Code No Manufacturer 24655 General Radio Co West 26365 Gries Reproducer Corp New 26462 Grobet File Co of America Inc 26992 28480 33173 35434 36196 37942 39543 40920 42190 43990 44655 47904 48620 Hamilton Watch Co Hewlett Packard Co G E Receiving Tube Dept Lectrohm I
75. nc Stanwyck Corp Hawkesbury P R Mallory amp Co Inc Mechanical Industries Prod Co Miniature Precision Bearings Inc Muter Co C A Norgren Co E Ohmite Mfg Co Polaroid Corp Precision Thermometer and Inst Co Raytheon Company Rowan Controller Co Ward Leonard Electric M Shallcross Mfg Co Simpson Electric Co Sonotone Corp Sorenson amp Co Inc So Spaulding Fibre Co Inc d Sprague Electric Co Telex inc Thomas amp Betts Co E Tripplett Electrical Inc Union Switch and Signal Div of Westinghouse Air Brake Universal Electric Co Ward Leonard Electric Co M Western Electric Co Inc 49956 52090 63743 54294 55026 55933 55938 56137 56289 59446 59730 50741 61775 62119 63743 64959 65092 66295 66346 Wittek Manufacturing Wollensak Optical Co Address Concord Mass Rochelle N Y Caristadt N J Lancaster Pa Palo Alto Calif Owensboro Ky Chicago lll Ontario Canada Indianapolis Ind Akron Ohio Keene N H Chicago IH nglewood Colo Skokie III Cambridge Mass Philadelphia Pa Lexington Mass Baltimore Md t Vernon N Y Seima N C Chicago il Elmsford N Y Norwalk Conn onawanda N Y North Adams Mass St Paul Minn lizabeth 1 N J Bluffton Ohio Swissvale Owosso Mich t Vernon N Y New York N Y Weston Inst Div of Daystrom Inc Newark N J Chicago 23 Ill R
76. net mount only INS insulation ed OH oval head SR split ring COEF coefficient INT internal Ox oxide STL steel COM common COMP composition K kilo 1000 P peak TA tantalum CONN connector PC printed circuit TD time delay CP cadmium plate LIN linear taper PF picofarads TGL toggle CRT cathode ray tube LK WASH lock washer 10 12 farads TI titanium CW clockwise LOG logarithmic taper PH BRZ phosphor bronze TOL tolerance LPF low pass filter PHL Phillips TRIM trimmer DEPC deposited carbon PIV peak inverse voltage TWT traveling wave tube DR drive M milli 10 3 P O part of MEG meg 106 POLY polystyrene U micro 10 6 ELECT electrolytic METFLM metal film PORC porcelain ENCAP encapsulated MFR manufacturer POS position s VAR variable EXT external MINAT miniature POT potentiometer VDCW de working volts MOM momentary PP peak to peak F farads MTG mounting PT point w with FH flat head MY mylar RECT rectifier w watts FILH fillister head RF radio frequency WW wirewound FXD fixed N nano 10 9 RH round head W O without 01194 10 01874 3 6 1 6 6 a Instrument model number b Instrument serial number e Description of the part To obtain a part that is not listed include d Function and location of the part REFERENCE DESIGNATORS HP 5253 Frequency Converter max Section VI Model 5253B Table 6 1 Table
77. nt panel of plug in is flush with front panel of counter Then turn retaining screw clockwise until it is tight 2 10 To remove unit from counter turn retaining screw counterclockwise to its stop Then grasp mixing frequency selector see Figure 3 1 and firmly pull unit from counter If any difficulty is encountered with installation or removal check that retaining screw is fully counterclockwise 2 11 POWER REQUIREMENTS 2 12 All electrical power required to operate the Model 5253B is supplied by the counter in which the unit is installed 2 13 ELECTRICAL CONNECTIONS 2 14 INPUT connector on front panel of plug in see Figure 3 1 is the only external electrical connection to the unit Allother connectionsare madethroushthe 50 pin connector at the rear of plug in when installed in counter 2 1 HP 5253 Frequency Converter max Section III Model 5253B Figure 3 1 CETT by PACHARD FUNCTION PERIOD AVERAGE MANUAL ei sett e wort ON Toon FREQUENCY INPUT signal connector difference frequency output of converter to counter When meter reads in the green por tion of its scale INPUT signal amplitude is MIXING FREQUENCY SELECTOR Calibrated in mc this control tunes the internal cavity to adequate for accurate frequency measurement select a harmonic of 10 mc to be heterodyned with the INPUT signal 4 RETAINING SCREW The screw which holds the converter in pla
78. nter display does not change more than momentarily during switching of attenuator INPUT signalis above noise threshold and frequency measurement result is valid 3 12 DOUBLE CHECKING FREQUENCY MEASUREMENT RESULT 3 13 Because of the heterodyne action of the con verter frequency measurement results obtained at any one setting of the mixing frequency control may be checked at other settings See Figure 3 3 for examples Table 3 1 Frequency Resolution 01874 1 INPUT SIGNAL FREQUENCY 151 1223344 Mc MIXING FREQUENCY CONTROL set to 140 Mc Counter Display J Measurement Resolution no display 11 Me 11 1 Mc i112 Mc 11122 1112 2 3 kc 1112233 ke 11122334 kc 1122 3344 kc 151 Mc 151 1 151 12 151 122 151 1223 151 1223 3 151 122 33 4 1511223344 3 1 HP 5253 Frequency Converter max HEWLETT hp PACKARD E ull CERTIFICATION The Hewlett Packard Company certifies that this instrument was thoroughly tested and inspected and found to meet its published specifications when it was shipped from the factory The Hewlett Packard Company further certifies that its calibration measurements are traceable to the U S National Bureau of Standards to the extent allowed by the Bureau s calibration facility WARRANTY AND ASSISTANCE All Hewlett Packard products are warranted against defects in materials and workmanship This warranty applies for one year
79. ochester N Y 70276 Allen Mfg Co Hartford Conn 70309 Allied Control Co Inc New York N Y 70319 Allmetal Screw Prod Co Inc Garden City N Y 70485 Atlantic India Rubber Works Inc Chicago Ill 70563 Amperite Co Inc New York N Y 70903 Belden Co Chicago IIl 70998 Bird Electronic Corp Cleveland Ohio 71002 Birnbach Radio Co New York N Y 71041 Boston Gear Works Div of Murray Co of Texas Quincy Mass 71218 Bud Radio Inc Cleveland Ohio 71286 Camloc Fastener Corp Paramus N J 71313 Allen 0 Cardwell Electronic Prod Corp Plainville Conn 71400 Bussmann Fuse Div of McGraw Edison Co t Louis Mo 71436 Chicago Condenser Corp Chicago 111 71450 CTS Corp Elkhart Ind 71468 Cannon Electric Co Los Angeles Calif 7147 Cinema Engineering Co Burbank Calif 71482 C P Clare amp Co Chicago Ill 71590 Centralab Div of Globe Union Inc Milwaukee Wis 71616 Commercial Plastics Co Chicago III 71700 Cornish Wire Co New York N Y 71744 Chicago Miniature Lamp Works Chicago Ill 71753 Smith Corp Crowley Div West Orange N J 71785 Cinch Mfg Corp Chicago 71984 Dow Corning Corp Midiand Mich 72092 Eitel McCullough Inc San Bruno Calif 72136 Electro Motive Mfg Co Inc Willimantic Conn 7170 Coto Coil Co Inc Providence R 1 12354 John E Fast amp Co Chicago ill 72619 Dialight Corp Brooklyn 72658 General Ceramics Corp Keasbey N J 726
80. only when con verter is properly tuned and amplitude of INPUT signal is adequate for accurate frequency measurement How ever because of conservative specifications of both the converter and counter frequencies may often be accurately measured when meter reads in the red por tion of its scale To make these extended range measurements a Follow normal procedure Figure IIA 1 or Para graph IIA 12 depending upon frequency range except that mixing frequency control should be tuned for first maximum reading on the level indicator meter re gardless of the color of region maximum b Insert an external variable attenuator such as Hewlett Packard Model 355A or 355C in the trans mission line between the converter and the source of INPUT signal Vary attenuation from 0 to 1 db during final step of frequency measurement procedure If counter display does not change more than moment arily during switching of attenuator INPUT signal is above noise threshold and frequency measurement result is valid NA 14 VIDEO AMPLIFIER ASSEMBLY Al 15 The output of the mixer circuit is amplified by transistors A1Q1 and 102 and is fed to the 12 Mc low pass filter network see Figure IIA 2 This fil ter passes any signal frequency below approximately 12 Mc and attenuates all higher frequency signals The low pass filter output is amplified by A1Q3 and fed to the last transistor amplifier A1Q4 which pro vides both the output to the c
81. ounter and the drive for the level indicator meter The limiter diode A1CR1 prevents the amplitude of the video amplifier output signal from exceeding approximately 300 mv RMS so that counter input circuits will not be overloaded The low frequency limit of the video amplifier determined by the bypass and interstage coupling networks is ap proximately 100 kc The converter output signal to the counter when converter is properly tuned will be between approximately 100 kc and 12 Mc and will have an amplitude that is less than approximately 300 mv RMS 16 LEVEL INDICATOR METER IIA 17 The de current supply for the meter is pro duced by metering detector AICR3 and smoothed by capacitor A1C16 see Figure 3 The value of shunt resistor AIR19 is selected to make level indi cator meter M1 read at red green border when amp litude of converter output to counter is in excess of the 100 mv RMS minimum signal amplitude normally required by the counter for accurate frequency measurement 18 HARMONIC GENERATOR ADJUSTMENT 19 To adjust the harmonic generator assembly proceed as follows a Remove converter from counter and reconnect to counter with Extension Cable 10506A 01874 1 Appendix II b Connect VHF Signal Generator to converter IN PUT and set to 472 Mc CW at 100 mv e Connect RF Millivoltmeter to Test Point 13 see Figure IIA 5 d Set converter mixing frequency control to 470 Mc an
82. plitude is greater than minimum signal required by counter input circuit INPUT SIGNAL Jl HARMONIC GENERATOR FROM COUNTER 4 5 HARMONIC GENERATOR A2 A3 AND HARMONIC SELECTOR CAVITY 4 6 10 Mc signal supplied by the Counter is amplified by A3Q1 to cause a tuned circuit composed of A3L2 A3C4 5 A3C6 and C22 to oscillate at 10 Mc Fig 4 2 Step recovery diode takes energy from this tuned circuit during a portion of each cycle of the 10 Mc oscillation and produces a sharp step in the current following in the input loop of the harmonic selector cavity This current step makes available inside the cavity all harmonics of 10 Mc from 10 Mc fundamental to over 500 Mc fiftieth harmonic The remaining components of the step recovery diode network Assembly A2 are used to maintain the sensitivity of the counter across its fre quency range The harmonic selector cavity is tuned toresonate at a particular harmonic of 10Mc between 50 and 500 Mc so that energy at that frequency is coupled from the input loop tothe output loops provid ing one of the two inputs to the mixer circuit Fig 4 22 hpa Application Note 1 The Step Recovery Diode Circuit Design and Performance hpa Application Note 42 Harmonic Generation Rectification and Lifetime Evaluation with the Step Recovery Diode reprinted from the PROCEEDINGS OF THE IRE VOL 50 NO 7 JULY 1962 available from hp associates 620 Pa
83. r of mixer diodes or A4CR1B is found to be defective both 01874 1 Section v Paragraphs 5 12 to 5 19 diodes should be replaced The recommended re placement procedure is as follows a Remove mixer assembly shield cover see Fig ure 5 3 b Remove diodes from spring clips noting orien tation c Install replacement diodes with same orientation d Replace mixer assembly shield cover e Perform the sensitivity check Paragraph 5 28 to insure that converter operation is within specifica tions 5 18 METER REPLACEMENT PROCEDURE 5 19 Ifthe level indicator meter requires replace ment follow this procedure a Remove converter from counter b Unscrew and remove small retaining screw MP1 see Figure 5 4 which holds video amplifier board A1 in place Remove screws which secure supporting bracket to front panel Remove supporting bracket Firmly grasp video amplifier board at the com ponent free end and pull board out of socket using a slight back and forth sideways movement d Place converter on bench with bottom plate rest ing on bench surface and with the front panel facing to the rear of the bench e Remove screw MP2 which holds aluminum spacer rod MP3 to plastic rear support MP4 see Figure 5 2 Grasp spacer rod and turn counterclock wise to remove rod from front support f Cut connecting wires at meter terminals g Remove screws MP5 6 see Figure 5 4 from meter
84. rter from counter and reconnect to counter with Extension Cable amp 10506A 01874 2 Section V Paragraphs 5 24 to 5 30 b Set VHF Signal Generator to 52 Mc CW at 50 mv and connect to INPUT of converter c Adjust controls as shown in Figure 3 2 d Set converter mixing frequency control to 50 Counter should display approximately 2 Mc e Using RF Millivoltmeter measure output of converter at Test Point 12 see Figures 5 4 and 5 5 Voltage should be at least 100 mv f Repeat above steps d and e with VHF Gener ator frequency of 472 Mc and converter mixing fre quency control set to 470 Mc Converter output to counter as measured by RF Millivoltmeter should be at least 100 mv g A similar check may be made at any frequency within the range of the Model 5253B Converter out put to counter should be at least 100 mv when differ ence frequency is between 100 kc and 12 Mc and con verter is properly tuned 5 29 METER ACCURACY CHECK a Turn counter power off remove converter from counter and reconnect to counter with Extension Cable 10506A b Set VHF Signal to 102 CW at 50 mv and connect to INPUT of converter Set con Counter Set controls as shown in Figure 3 2 verter mixing frequency control to 100 Mc should display approximately 2 Mc d Vary output of VHF Signal Generator for con verter level indicator to make meter read at red green border e Using RF Milli
85. surement Procedure 3 2 3 3 Typical Frequency Measurements 3 3 4 1 Block Diagram 4 0 4 2 Harmonic Generator A2 A3 4 0 4 3 Harmonic Selector Cavity 4 1 4 4 Balanced Mixer 44 4 2 4 5 Video Amplifier 1 4 3 4 6 Level Indicator Meter Circuit 4 3 5 1 Al Video Amplifier Component Location 5 6 5 2 Left Side 5 7 5 3 Right Side View 5 8 Figure 5 4 5 5 Top View Test Schematic Diagram s a 6 s o APPENDIX IA 1 HA 1 HA 2 IIA 3 HA 4 5 IIA 6 1 8 Schematic Diagram Frequency Measurement Procedure Video Amplifier Level Indicator Meter Circuit TOPVIEW s re Left Side View 2 2 2 2 0 Right Side View Top View Test Points Schematic Diagram e a w a c a e e s o k o al LIST OF TABLES Table Page 1 1 1 1 3 1 Frequency Resolution 3 1 5 1 Recommended Test Equipment 5 1 5 2 Resistance Troubleshooting Aid 5 1 5 3 Troubleshooting Procedure 5 2 9 4 Adjustments after Repair 5 4 6 1 Reference Designation Index 6 2 01874 2 Table 6 2 Replaceable APPENDIX IA 1 Reference Designation Index IIA 1 Specifications
86. taining Ring Co Automatic and Precision Mfg Co Yonkers N Y Burlington Mass Oakland Calif Irvington N J CBS Electronics Div of C B S Inc Reon Resistor Corp Axel Brothers Inc Rubber Teck Inc Danvers Mass Yonkers N Y Jamaica N Y Gardena Calif HP 5253 Frequency Converter max Code Ho 98220 98278 98291 98405 98731 98821 98925 98978 99109 99313 99515 99707 99800 99848 99934 99942 99957 Model 5253B Manufacturer Address Francis L Mosley Pasadena Calit Microdot Inc So Pasadena Calif Sealectro Corp Mamaroneck Carad Corp Redwood City Calif General Mills Minneapolis Minn North Hills Electric Co Clevite Transistor Prod Div of Clevite Corp International Electronic Research Corp Columbia Technical Corp Varian Associates Marshall Industries Electron Products Division Pasadena Calif Control Switch Division Controls Co of America El Segundo Calif Delevan Electronics Corp East Aurora N Y Wilco Corporation Indianapolis Ind Renbrandt Inc Boston Mass Hoffman Semiconductor Div of Hoffman Electronics Corp Technology Instrument Corp of Calif Mineola N Y Waltham Mass Burbank Calif New York N Y Palo Alto Calif Evanston ilf Newbury Park Calif THE FOLLOWING H P VENDORS HAVE NO NUM BER ASSIGNED N THE LATEST SUPPLEMENT TO THE FEDERAL SUPPLY CODE FOR MANUFAC TURERS HANDBOOK J0000 0000 0000 0000
87. ter max TEXAS Dallas 75209 P 0 Box 7166 3605 Inwood Rd 214 357 1881 and 332 6667 TWX 910 861 4081 Houston 77027 0 Box 22813 4242 Richmond Ave 713 667 2407 TWX 713 571 1353 UTAH Salt Lake City 84115 1482 Major St 801 486 8166 TWX 801 521 2604 VIRGINIA Richmond 23230 2112 Spencer Road 703 282 5451 TWX 710 956 0157 WASHINGTON Bellevue 98004 11656 N E 8th St 206 454 3971 TWX 910 443 2303 GOVERNMENT CONTRACTING OFFICES Middletown Pa 17057 Hewlett Packard Contract Marketing Division Olmsted Plaza 717 944 7401 TWX 717 760 4816 West Conshohocken Pa 19428 Hewlett Packard Contract Marketing Division 144 Elizabeth Street 215 753 1811 TWX 215 820 3847 CANADA Montreal Quebec Hewlett Packard Canada Ltd 8270 Mayrand Street 514 735 2273 TWX 610 421 3484 Ottawa Ontario Hewlett Packard Canada Ltd 1762 Carling Avenue 613 722 4223 TWX 610 562 1952 Toronto Ontario Hewlett Packard Canada Ltd 1415 Lawrence Avenue West 416 249 9196 TWX 610 492 2382 Vancouver B C Hewlett Packard Canada Ltd 2184 W Broadway 604 738 7520 TWX 610 922 5059 11 65 HEWLETT PACKARD Electronic ARGENTINA Mauricio A Saurez Telecomunicaciones Carlos Calvo 224 Buenos Aires Tel 30 6312 AUSTRALIA Sample Electronics Vic Pty Ltd 9 11 Cremorne Street Richmond E 1 Victoria Tel 42 4757 3 lines Sample Electronics N
88. tion in extremely dusty environments periodically clean all gears with a lint free cloth and apply a coating of light petroleum base open gear grease to all gear teeth 5 6 TEST EQUIPMENT 5 7 All test instruments required for performance testing troubleshooting and circuit adjustment after repair are listed in Table 5 1 Instruments having equivalent specifications may be substituted for the specific instruments recommended 5 8 TROUBLESHOOTING 5 9 Table 5 2 lists resistances from connecting pins on connector J1 to chassis when unit is not con nected to counter to aid in troubleshooting Table 5 3 is a suggested troubleshooting procedure which lists circuit conditions at Test Points throughout the con verter These Test Points are keyed to the component location drawings Figures 5 1 5 2 5 3 and 5 4 and also to the schematic diagram Figure 5 5 Volt ages listed in Table 5 3 are approximate and may vary widely between instruments due to variations in component values Table 5 4 lists recommended adjustments to be made after repair of any section of the converter Table 5 2 Resistance Troubleshooting Aid Resistance to Chassis gt 100 megohms 1 K ohms 20 140 K ohms 20 125 K ohms 20 J1 Pin 1 J1 Pin 15 J1 Pin 20 J1 Pin 25 Unit not connected to counter 5 10 REPAIR AND REPLACEMENT 5 11 Paragraphs 5 12 through 5 19 are replace ment procedures to aid in repair of the conv
89. trument to instrument because of variations in com ponent characteristics TEST EQUIPMENT Model 411A RF Millivoltmeter with 11022A formerly 411A 21B Pen Type Probe Tip Model 412A DC VTVM REMOVE 5253B FROM COUNTER SELF CHECK COUNTER See counter manual for self check procedure CONNECT 25253B TO COUNTER WITH EXTEN i 3 SION CABLE 10506 formerly AC 16Y Extension cable available from see parts list X 20 VDC Checks power supplied to plug in from counter see counter manual for power supply adjustment Qr 15 VDC procedure 6 VDC A X 2 VAC Checks 10 Mc drive of harmonic generator Checks generator diode drive Voltages vary 2 VDC 2 VAC widely because of both the detuning effect of volt meter probe and the variable value of A3R3 DC voltage may be either or depending upon fac tory determined generator diode orientation Voltages vary widely because of diode charac 100 Mv DC teristics Voltages are 0 VDC when diode shorted and 20 VDC when diode open Voltages should e Wy 100 MV DC approximately equal because of matched characteristics CONNECT SIGNAL GENERATOR TO 5253B SET GENERATOR TO 52 MC Cw 100 MV SET COUNTER CONTROLS AND 5253B TO MEASURE FREQUENCY OF INPUT SIGNAL Yt 5 MV RMS This voltage is total harmonic energy output of mixer and varies widely 11 3 VDC 30 MV RMS Checks bias and amplification of A1Q2 and 161 12 3 VDC 1
90. voltmeter measure converter output to counter at Test Point 12 Voltage should be between 100 mv and 130 mv If not see Para graph 5 24 for meter calibration adjustment procedure 5 30 LOW PASS FILTER CHECK a Turn counter power off remove converter from counter and reconnect to counter with Extension Cable 10506A b Set VHF Signal Generator to 110 Mc CW at 50 mv and connect to INPUT of converter Set controls as shown in Figure 3 2 Set con verter mixing frequency control to 100 Mc Counter should display approximately 10 Mc d Connect RF Millivoltmeter to Test Point 12 Vary output of VHF Signal Generator for RF Milli voltmeter reading of 100 mv Note output level of VHF Signal Generator 5 5 HP 5253 Frequency Converter max Section V Paragraph 5 31 e Set VHF Signal Generator to 115 Mc at same output level as noted in step d above Converter out put to counter as shown on RF Millivoltmeter should not exceed 50 mv If converter output to counter is greater than 50 mv see Paragraph 5 23 for low pass filter adjustment procedure 5 31 IN CABINET PERFORMANCE CHECK a Turn counter power off and install converter 05253 6007_ 24 Model 5253B b Set VHF Signal Generator to 52 Mc CW at 50 mv and connect to INPUT of converter c Set controls as shown in Figure 3 2 Counter should display approximately 2 Mc d Set VHF Signal Generator to any frequency be tween 50 Mc and
91. y 25 ZERO SET When meter is properly zero set pointer rests over the zero calibration mark at the left hand end of meter scale when converter is 1 at normal operating temperature 2 in normal operating position and 3 without power Proceed as follows a Allow counter and converter to operate for one hour to permit meter movement to reach normal oper ating temperature b Turn counter off and allow one minute for all capacitors to discharge c Remove converter from counter to enable access to rear of meter d Remove adhesive backed paper cover from meter zero adjustment access hole on top rear of meter e Carefully insert small tool in access hole and engage adjustment fork f Vary setting of adjustment fork until meter reads zero g Remove tool and replace adhesive backed paper cover on access hole This completes meter zero adjustment procedure 26 SENSITIVITY CHECK a Turn counter power off remove converter from counter and reconnect to counter with Extension Cable 10506A b Set VHF Signal Generator to 102 Mc CW at 50 mv and connect to INPUT of converter c Adjust controls as shown in Figure IIA 2 d Set converter mixing frequency control to 100 Mc Counter should display approximately 2 Mc e Using RF Millivoltmeter measure output of con verter at Test Point 13 see Figure 7 Voltage Should be at least 100 mv 01874 1 Appendix II f Repeat above steps

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