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HP 85020B User's Manual

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1. 85020A BRIDGE K HEWLETT PACKARD 85020 A B DIRECTIONAL MADE IN USA gt m ul gt WW E PACKARD 85020A B DIRECTIONAL BRIDGE SERIAL NUMBERS This manual applies directly to the HP Model 85020A B Directional Bridge with serial numbers prefixed as follows Model Serial Prefix 85020A 2301A 850208 2308A For additional information about serial numbers refer to INSTRUMENTS COVERED BY MANUAL in Section I Copyright HEWLETT PACKARD COMPANY 1983 1400 FOUNTAIN GROVE PARKWAY SANTA ROSA CA 95401 U S A Manual Part No 85020 90001 Microfiche Part No 85020 90002 Printed JUNE 1983 Le HEWLETT PACKARD General Information Model 85020A B AS pU ER Ya DH E Sc Se E E ENG SENSUS SANT ESSENER EN S N N Figure 1 1 Model 85020A Directional Bridge in Accessory Case Supplied Model 85020A B General Information CAUTION The 85020A B Directional Bridges contain microcircuits that are highly sensitive to electrostatic discharge ESD Damage from ESD is most likely to occur as the bridges are connected or disconnected The surest method of protecting the 85020A B is for the operator to wear a grounding strap that provides a path to ground of no less than 1 Megohm and no more than 2 5 Megohns Alternatively the operator can ground himself before touching the bridge connectors by touching any grounded instrument chassis Never touch the cen
2. Lj o PROCEDURE l Connect equipment as shown above 2 Set up the test equipment as follows On the 8350A B press INSTR PRESET SHIFT CW 5 0 MHz to set the signal to 50 MHz swept CW Press SWEEP TIME 1 5 0 ms Press LI MOD to turn on squarewave modulation On the Scalar Network Analyzer press SHIFT and Channel 2 MEAS RATIO to turn off Channel 2 Figure 3 2 85020A Operators Check 1 of 2 3 5 Operation Model 85020A B 3 6 Perform an OPEN SHORT calibration as follows Press 8756A MAIN MENU soft keys CAL OPEN SHORT CHAN 1 Connect the calibrated short to the test port of the 85020A and press STORE SHORT to store the short calibration data Remove the short and connect the shielded open to the test port On the 8756A press STORE OPEN to store the open calibration data On the 8756A Channel 1 press IDISPLAY until M MEM is selected The Channel 1 normalized trace will be displayed Remove the shielded open and connect the 10 dB Attenuator to the 85020A test port Leave the other end of the attenuator unterminated On the 8756A press CURSOR The return loss of the unterminated pad 10 dB in each direction will be displayed The display should read 20 dB 2dB Figure 3 2 85020A Operator s Check 2 of 2 Model 85020A B Operation 85020B OPERATOR S CHECK SWEEP OUT IN SCALAR NETWORK OSCILLATOR 555 5 5277 ANALYZER m vasos oan aens ol
3. 2 4 to 3 0 GHz 3 0 to 4 3 GHz TEST PORT MATCH SWR Calculated Specified Frequency Range Step SWR Upper Limit 85020A 85020B 0 01 to 1 3 GHz 1 3 to 2 4 GHz 2 4 to 3 0 GHz 3 0 to 4 3 GHz Model 85020A B Adjustments SECTION V ADJUSTMENTS 5 1 INTRODUCTION 5 2 There are no adjustments recommended for regular calibration or normal use of the 85020A B Directional Bridge However if the internal bridge microcircuit is replaced adjustments must be made to compensate the preamolifier for the individual diode characteristics The procedures for replacing the bridge microcircuit and adjusting the preamplifier are described in Section VIII Service of this manual 5 1 5 2 Model 85020A B Replaceable Parts SECTION VI REPLACEABLE PARTS 6 1 INTRODUCTION 6 2 This section contains information for ordering parts Table 6 1 lists the available exchange assemblies Table 6 2 lists abbreviations used in the parts lists and the names and addresses that correspond with the manufacturers code numbers Tables 6 3A and 6 3B list the replaceable parts in reference designator order for the 85020A and 85020B separately Only the listed parts are replaceable 6 3 EXCHANGE ASSEMBLIES 6 4 The microcircuit bridge assembly including input and test port connectors and the reference termination may be renlaced on an exchange basis thus affording a considerable cost savinas Table 6 1 lists these assem
4. Kewell Packard Co PO Box 3916 6177 Lake Eiengr Drive ORLANDO Fi 32899 Tet 1365 859 2900 ACHCMEOSEMS Bewiett Packard Co 5750 North Hoover Suite 23 TAMPA FL 33634 Tes 913 872 0906 A CHOM CS E Mr Georgia Hewled Packard Co P O Box 195905 ATLANTA GA 30348 2008 South Park Pace ATLANTA GA 30339 Tel 404 955 1500 Telex 810 768 4890 A CH CM CS E MP Hewielt Pack ard Ca PO Box 2163 WARNER ROBINS GA 33099 1172 N Davis Deive WARRER ROBINS GA 31093 e 1912 923 8831 E Hawaii Hewlett Packard Co Kawaiahao Plaza Suite 190 567 South King Street HOMOLUESY HI 96813 Tel 808 525 1555 ACHEMS IBinots Hewlett Packard Co 5201 Follview drive ROLLING MEADOWS t 60008 Tei 312 255 9908 ACH OM CSE MP indiana Hewiell Packard Co P G Box 50807 7301 No Shadeland Avenue INDIANAPOLIS IN 46250 ei 3917 B42 1000 A CH CM CS E MS iowa Hewiell Packard Co 2415 Henz Road IOWA CITY 34 52240 Tel 359 351 1620 366 6477 OR E MS Louisiana Hewlett Packard Co FO Box 1649 KENNER A 70062 150 ames Dive Easl DESTAHAN L 20047 Tet 1504 467 400 ACHTSEMS Maryland Hawiell Pachard Co Tt21 Standard Drive HANOVER AO 21976 Tei 301 796 7700 ACHOMESEMS Hewirtt Pack arg Co 2 Choke Cherry Road ROCKVALE MD 20850 Tel 301 349 6370 Telex 750 828 9885 ACH CM CS E MP Massachusetts Hewlett Packard Co 32 Hartwell Avene LEXINGTON MA 02173 Tel 6173 865 2960 A C
5. MSP YUGOSLAVIA iskra Commerce Representation of Hewlett Packard Sava Centar Delegacia 30 Mientis Popovica 11170 BEOGRAD Tet 638 762 Telex 12042 12322 YU SAV CEN iskra Commerce Representation o Hewlett Packard Koprska 46 6 1000 LJUBLJANA Tel 22 1674 315879 Telex ZIMBABWE Field Technical Sates 45 Kelym Road North PB 3458 SALISBURY Ter 705 231 Telex 4 122 AW CEMP it there is no sales office listed for your area contact one of these headquarters offices NORTH CENTRAL AFRICA EASTERN USA Hewietl Packard SA Rue du Bois du Lan CH 1217 MEYRIN 2 Switzerfand Tel 622 98 96 51 Teiex 27835 hpse Cable HEWPACKSA Geneve ASIA Hewieti Packard Asia id Bik For Sun Hung Kar Center 30 Harbor Re GPG Box 795 WONG KONG Tel 5 832 3211 Telex 58678 HEWPA HX Gable HP ASIA LIG Hong Kong CANADA Hewlelt Packard Canada Lid 8877 Goraway Drive MISSISAHGA Ontario LAV IMB Tel 416 578 9430 Telex 610 492 4246 EASTERN EUROPE Hewietl Packard Ges m b A Wehislrasse 29 P O Box 7 4 1205 VIENNA Tel 2221 35 16 210 Telex 1358237335066 NORTHERN EUROPE Hewielt Packasd S A Uilenstede 475 NL 1 83 AG AMSTELYEEN The Netherlands POBox 999 Ni 1180 AZ AMSTELVEEN The Netherlands Tei 20 437171 OTHER EUROPEAN Hewlett Packard S A Rue du Eois du Lan CH 1217 METRIN 2 Switzerland Tei 4022 98 96 51 Telex 27835 hose Cate HEWPACKSA Geneve Offices in the Worl
6. 1 23 Both the 8756A and the 8755C use an AC detection technique with an operating frequency of 27 8 kHz This technique provides nearly drift free operation An RF or microwave source signal is modulated at 27 8 kHz and is input to the Scalar Network Analyzer through one or more detector inputs The detectors demodulate this signal to produce a 27 8 kHz square wave whose peak to peak voltage corresponds to the magnitude of the siqnal at the detector input Since only the 27 8 kHz modulated signal is detected unmodulated broadband noise and extraneous signals are eliminated from the measurement 1 24 Swept Signal Source 1 25 A complete system for makina transmission and reflection measurements requires a swept signal source to supply an RF input signal The Model 8350B Sweep Oscillator with an RF Plua In installed is an 8756A compatible solid state swept signal source with a frequency range determined by the RF Plug In For example the Model 83525A B RF Plug In covers a frequency range of 0 01 to 8 4 GHz and the Model 83522A has the same frequency range as the 85020B 0 01 to 2 4 GHz The 8350B is fully HP IR programmable and can be controlled by the 8756A through the 8756 System Interface It has internal 27 8 kHz sauarewave modulation capability 1 26 The Model 8350A Sweep Oscillator is similar to the 8350R and is compatible with the 8756A However it does not have the firmware to enable 8756A control through the 8756 System Interf
7. 500 750 MATCHING PAD r skort ebe TI 500 750 MATCHING PAD EQUIPMENT e gt a HP 8350A B HP 83522A 83525A B Sweep Oscillator n RF Plug In D D D D D 3 9 gt LJ e D amp Scalar Network Analyzer A E HP 8756A 10 dB Attenuator a Be 4 s e de HP 84918 Option 010 Calibrated 75 Ohm short Circuit 415 EA HP Part No 1250 1530 50 Ohm to 75 Ohm Minimum Loss Pads 2 gt ou HP 11852A PROCEDURE 1 Connect equipment as shown above 2 Set up the test equipment as follows On the 8350A B press INSTR PRESET SHIFT CW 5 0 MHz to set the signal to 50 MHz swept CW Press SWEEP TIME 1 5 0 ms Press LI MOD to turn on squarewave modulation On the Scalar Network Analyzer press SHIFT and Channel 2 MEAS RATIO to turn off Channel 2 Figure 3 3 85020B Operators Check 1 of 2 3 7 Operation Model 85020A B Perform an OPEN SHORT calibration as follows Press 8756A MAIN MENU soft keys CAL OPEN SHORT CHAN 1 Connect the 75 ohm calibrated short to the test port of the 85020B and press STORE SHORT to store the short calibration data Remove the short and leave the test port open On the 8756A press STORE OPEN to store the open calibration data On the 8756A Channel 1 press DISPLAY until M MEM is selected The Channel 1 normalized trace will be displayed Connect the minimum loss pad to the 85020B test port Leave the other end of the minimum loss pad un
8. Blue Star Ltd Sahas 414 2 Vir Savarkar Marg Prabhadev BOMBAY 400 025 Tet 422 6155 Telex 077 4093 Cabre FROSTBLUE ACH CM ES EM Blue Star Lid Bhandari House 711 81 Floors 91 Nehry Place MEW DELHI 110 024 Tet 582547 Telex 031 2453 Cate BLUESTAR A CH CM CS E M Blue Star Ltd 2 2 47 1108 Solanum Rd SECUNDERABAD 500 003 Ter 72057 Teiex 0155 459 Cable BLUEFROST AE Be Star Lid T C 7 603 Poornima Mandant TRIVABORUM 695 013 Tei 65799 Telex 0084 259 Cadie BLUESTAR D INDONESIA BEACA indonesia P T Wisma Antara Bidg 17th floor JAKARTA ACSEM BERCA indonesia P T P O Box 174 5BY A Kutei No 17 SURABAYA Te 68 72 Telex 31146 BERSAL SB Cable BERSAL SURABAYA EMP IRELAND Kewiett Packard breland itd Kestrei House Cia william Court Lower Mount Street BURUN 2 Exe Tel 1 60 82 OG Telex 30439 ACHCMESEM P ISRAEL Eleciromes Engineering Division Motorola israel Lid 16 Kremenelski Street O Box 25016 TELAVIV 67399 Tet 3 338973 Telex 33569 Moti Cable BASTEL Tel Aviv ACHRCM CS EMP ITALY Hewlett Packard takana S p A Via Manin Luther King 38 111 140132 BOLOGNA Tat 051 402394 Telex 511630 CHOM EMS Hewlett Packard ttaliana S p A Via G Di Vittorio 9 20063 CERNUSCO SUL NAYIGUO et 2 90369 Telex 334632 ACH CM CS E MP P Hewiell Packard italiana Sp A Vig Nuova san Rocco A Capodimonte 52 A 80131 MAPLES Tef 081 7413544
9. CHANNEL 2 a 2 e a a OFF CHANNEL 1 2 L e o e 9 e 8 LJ ON MEAS PWR e L b o e gt e gt e gt gt A REF LEVEL e gt LJ s o gt Ld e o 2 gt 0 SCALE D D D D H H a a 10 dB DIV 5 Set the attenuator to 0 dB Set the REFERENCE POSITION near the top of the screen Adjust the REFERENCE LEVEL to coincide with the REFERENCE POSITION The reference level should be 0 dBm 2 dB with an input signal of 13 dBm for the 85020A For the 85020B the reference level should be 6 dBm 2 dB 6 Set the attenuator to 20 dB On the 85020A B adjust A2R2 2 to position the trace on the graticule line 20 dB below the reference 7 Set the attenuator to 0 dB On the 85020A B adjust A2R4 GAIN to reposition the trace at the reference 8 Iterate between the last two steps until the trace is on the graticule line 0 5 dB at both steps 9 Step the attenuator in 10 dB steps to 40 dB Check that the traces at all steps are spaced at 10 dB intervals 0 5 dB on the display If the trace is not tracking at 10 dB intervals iterate between 0 dB and 40 dB of attenuation while compensating the GAIN and Z adjustments as described above 8 15 Service Model 85020A B AZR2 Z A2RM CGAIND WHITE BLACK WHITE RED Figure 8 8 Preamplifier Assembly Adjustment Locations 8 16 D SALES amp SUPPORT OFFICES Arranged alphabetically by country Product Line Sales Support Key Kay Product Live A Ansiri
10. Telex 719698 ACH CM E Hewlett Packard Hahana S p A Viale G Motrigno 33 46 456 GENOVA PEGLE Tet 050 66 37 07 C Hewlett Packard tatane Sp Vig furazza 54 1 35 100 PADOVA Zet 1049 664898 Telex 430315 ACHCMEMS Hewlett Packard Rasana S p A Wate C Pavese 340 140144 ROMA Tes 06 54931 Teiex 610514 ACH CM CS E MS P Hewlett Packard Italiana S p A Corso Svizzera 164 110143 TORINO Tel 011 74 4044 Telex 221079 CHCME JAPAN Yokogawa HawieH Packard Lid Inoue Bu d ng 1 23 8 Asahi cho ATSUGI Kanagawa 243 Tel 0462 28 045 1 CMC E Yokogawa Fewiett Packard Ltd Sannomiya Dach Seimei Bidg 69 X yo machi Chup ky KOBE 556 Tel 0785 392 4791 C Yokogawa Hewiell Packard Lid Kurmagaya Asahi Yasosi Bldg AF 3 4 Chome Tsukuba KUMAGAYA Saitama 360 Tel 0485 24 6563 CHCME Yokogawa Hewietl Packard Lid Asahi Shinn Daiichi Bldg 2F 4 7 Hanabata cho KUMAMOTO SHE S60 Tel 0963 54 7311 CHE Yokogawa Hewell Packard Lid Shin Kyoto Center Bigg SF 814 Siokoj cho Nish tuhigashi Kafasuma Siokaji dori Shimogyo ku KYOTO 600 Fel 075 243 0821 CHE Yokogawa Hewlett Packard Ltd Mito Mitsui Buding 54 73 San no mary MITO Ibaragi 350 Tes 10292 25 7476 CHCME Yokogawa Hewlett Packard Lid Surnitomo Seimei Nagoya Skig 11 2 Shimo sasajima cho Nakarnira xu MAGOYA Aichi 456 Tel 052 571 5171 CH CM ES MS Yokogawa Hewieti Packard Lid Chuo Bldg Ap
11. 75 ohms Output Connector Type N Type N EI 50 ohms 75 ohms 2 Maximum Power to Input Port 23 dBm 25 mm high x 110 mm wide x 96 mm deep 1 0 in x 4 3 in x 3 9 in cable length 1219 mm 48 inches Directivity 0 01 to 2 4 GHz 2 4 to 3 0 GHz 3 0 to 4 3 GHz Test Port Match SWR 0 01 to 1 3 GHz 1 3 to 2 4 GHz 2 4 to 3 0 GHZ 3 0 to 4 3 GHz Dimensions Weight Net 0 5 kg 1 2 1b Shipping 2 3 kq 5 1b L Unless otherwise noted all specifications are at 0 C to 55 C 225 c 5 1 8 Model 85020A B General Information Table 1 2 Supplemental Characteristics Values in this table are not svecifications but are typical but non warranted performance parameters included for user information 2 40 kennen m Typical 35 Specification Directivity gt nina 25 85020B 85020A 0 01 2 4 3 0 4 3 Frequency GHz 850208 1 2 Typical Input Port Match SWR 0 01 to 2 4 GHz 1 2 2 4 to 4 3 GHz lt 1 2 Typical Insertion Loss 6 5 dB Typical Detector Flatness Referenced to 1 GHz 0 5 dB 0 5 dB Minimum Input Power for 40 dB Return Loss Measurement 4 dBm 4 dBm Nominal Impedance 50 ohms 1 9 General Information Model 85020A B 1 10 Table 1 3 System Verification Sets HP Model 85023C Type N 50 Ohms For Use with Model 85020A Directional Bridge HP Part or Oty Acc
12. CLARA CA METRIC AND MULTISTANDARD COMPONENT CORP ELMSFORD NY CORNING GLASS WORKS BRADFORD PA HEWLETT PACKARD CORP HO PALO ALTO CA REFERENCE DESIGNATIONS A Assembly R Resistor AT Termination U Integrated Circuit C Capacitor TP Test Point CR Diode MP Miscellaneous Part J Jack Connector W Cable Wire en ABBREVIATIONS ADJ Adjust Adjustment MTG Mounting AWG American Wire Gage NS Nanosecond CER Ceramic NYL Nylon Polvamide CHAM Chamfer OP AMP Operational COND Conductor Amplifier CORR Corrugated PF Picofarad CR Crystal Rectifier PKG Package DBL Double PL Plate Plug DEG Degree PRCN Precision DIA Diameter RLG Rolling DIP Dual In Line Package RSC Regular Slotted DO Package Type Desiqnation Container F Film Resistor Fixed SCR Screw FLH Flat Head SLDR Solder FXD Fixed T Tab Width Taper HEX Hexagonal TA Tantalum IC Integrated Circuit TC Thermoplastic ID Inside Diameter THD Thread Threaded IN Inch THK Thick INTL Internal TO Package Type Designation K Kilo TRMR Trimmer LG Length Long TRN Turn Turns LK Lock UF Microfarad M Mounting Hole Diameter V Volt Voltage MA Milliampere VDC volts Direct Current MACH Machined W Watt Wattage MM Millimeter WD Width 6 3 Replaceable Parts Model 85020 A B Table 6 34 Model 85020
13. Co P D Box 42818 HOUSTON TX 77042 10535 Harwin Street HOUSTON TX 77036 Te 7 13 776 6406 ACH OMOBE MP Hewlett Packard Co P O Box 1276 RICHARDSON 7x 75080 930 Campbell Bd RICHAROSON TX 7508 Ter 254 238 5191 ACH CM CS E MP Hewlett Packard Co P G Box 32993 SAM ANTONIO TX 782 16 1020 Central Parkway South SAH ANTONIO TX 78232 Tel 512 494 9336 CH CS EMS Utah Hewielt Packard Co P O Box 28626 3530 W 2100 South SALT LAKE CITY UT 84419 Yee 9015 974 1700 A CH OS E MS Virginia Hewlett Packard Co PD Box 9669 2914 Hungaty Spring Road RICHMOND VA 23228 Tet 804 285 3431 A KCSEMS Hewlett Packard Co 3108 Peters Creek Road N W ROANOKE YA 240 19 Tek 703 553 2205 SHE D Arranged alphabetically by country cont Washington Hewiell Packard Co 15835 SE 37ih Steet BELLEVUE WA 98006 Tat 206 643 4006 A CH CM CS E MP Wisconsin Hewiell Pack aed Do 150 Sunny Slope Road BROOXFIELD WI 53005 Tel 414 784 8800 A CH CS E MP URUGUAY Pabio Ferrando S A C ei Avenida Hala 2877 Casilla de Correo 370 MONTEVIDEO Tel 80 2586 Faiga Public Booth 901 ACMEM U S S R Hewlett Packard Co Representative Office Poksovsky Bivd 4 17 KV12 MOSCOW 101000 Tet 264 2024 Telex 7625 HEWPACK SU VENEZUELA Hewlett Packard de Venezuela C A Apartado 50933 3A Fransvetsaf Los Ruices Node diticio Segre CARACAS 10 1 Tel 239 4133 Telex 25346 HEWPACK A 01 05
14. FROLUNDA Tel 035 49 09 50 Telex 858 10721 via SPANGA otice CHCMEP SWITZERLAND Hewlett Packard Schweiz AG 29 Chemin Ch teau Bloc D 12 39 LE LIGHON Geneva Tei 1022 96 03 22 Telex 27333 hpag ch Cabie HEWPAGKAG Geneva ACM MS P Hewlett Packard Schwerz AG Aimend 2 CH 8057 WIDEN Tel 575 50 111 Telex 59933 hpag ch Cable HPAG CH A CHEM OS E MSP SYRIA Generai Electronic Inc Nutt Basra Ahngt Ebr Kays Street P O Box 5781 DAMASCUS Tal 19 24 87 feier F1215 ITKAL Cable EL ECTROBOR DAMASCUS TAIWAN Hewlett Packard Far as Lu Taiwan Branch Sth Floor 205 Fun Hwa North Road TAIPEI Tel 02 751 9404 Sabie HEWPACK Taipei ACH CM OS EMP THAILAND Unimesa 30 Patpong Ave Suriwong BANGKOK Tet 234 091 234 092 Telex 84439 Simonco TW Cable UNIMESA Bangkok ACEM TRINIDAD amp TOBAGO Caribbean Telecoms Ltd SOA Jerningham Avenue P O Bax 732 PORT OF SPAIN Vel 62 442 13 62 482 14 Telex 235 272 HUGCO WG ACMEMP TUNISIA Tunisie Electronique 3 Avenue de is Liberte TUNIS Ter 280 144 EP TURKEY Teknim Company Lid fran Caddesi No Kavaklidere ANKARA Tet 275800 Telex 42155 D UNITED ARAB EMIRATES Emitac Ltd P O Box 184 SHARJAH Pel 354121 358123 Telex 68136 Emitac Sh CHOSE MP UNITED KINGDOM 888 GREAT BRITAIN SCOTLAND UNITED STATES Alabama Hewlett Packard Co 2 0 Box 4207 8290 Whitesburg Drive SE HUNTSVILLE AL
15. the electrical performance of the 85020A B using the svecifications of Table 1 1 as the performance standards All tests can be performed without access to the interior of the instrument 4 3 EQUIPMENT REQUIRED 4 4 Equipment required for the performance tests is listed in the Recommended Test Equipment table in Section I Any equipment that satisfies the critical specifications given in the table may be substituted for the recommended model 4 5 PERFORMANCE TEST RECORD 4 6 Results of the performance tests may be tabulated on the Performance Test Record at the end of the procedures The Performance Test Record lists all of the tested specifications and their acceptable limits Test results recorded at incoming inspection can be used for comparison in periodic maintenance and troubleshooting and after repairs or adjustments 4 1 Performance Tests Model 85020A B 4 7 DIRECTIVITY Specifications 0 01 to 2 4 GHz 2 4 to 3 0 GHz 3 0 to 4 3 GHz Description Directivity is a measure of the ability of a directive device to discriminate between incident and reflected signals In principle directivity can be measured when the TEST port is terminated with a perfect load to eliminate all reflected siqnals Any remaining Signals detected are the directivity errors However since no perfect load is available the test procedures below make allowances for this external error First an open short calibration is performed T
16. 0 3 DIODE SWITCHING 80V 200MA 2NS DO 35 0050 A2CR2 1901 0050 3 DIODE SWITCHING 80V 200MA 2NS 50 35 0050 A2RI 0698 7205 0 RESISTOR 51 1 1 05W F TC 04 100 8 TO 51Rl F ARRZ 2180 3210 5 RESISTOR TRMR LOK 19 C TOP ANT 1 TR 323 0 A2R3 0698 7248 1 RESISTOR 3 16K i 05W F TC 0 100 8 TO 3181 F A2R4 2190 3253 7 RESISTOR TRMR SOK 19 C TOP ADI l TRN 03253 A2RS 0698 7212 a RERISTOR 100 1 05W P TC 1 8 TO 120R F Azul 1826 0932 0 TC OP AMP PREN 8 DIP C PR 5668 nop27r2 A2T PE 0350 0535 D TERMINAL TEST POINT 330 28480 0360 0535 MPI 5001 1599 DRESS COVER 28489 5001 1590 MP2 7100 1275 4 END COVER 28480 7109 1275 MP3 5021 3587 5 EXPRUDED FRAME 28480 5021 3587 MP4 7190 1276 5 PORT COVER 28480 7100 1276 MP5 2950 000 8 SUT HEX NBL CH 28480 2950 0001 MP6 2190 0016 3 28480 2190 0016 Mp7 0360 1190 5 28489 9360 1199 MP3 9515 0823 8 239480 9515 2823 Mp9 1531 0289 5 RRIDGE SPACER 28486 1531 8289 MP1G 0515 0820 5 SCREW MACH M2 15526 9635X M2 53 MPil 7121 4534 B ICATION 28480 7121 4534 MP12 1400 0249 0 dd ARS 06383 PLTIM B MP13 1540 0181 5 28480 1540 0181 MP14 85020 86001 7 28480 85020 80001 MP15 7121 4535 9 28480 7121 4535 MP16 5952 0948 9 STOMETER CA 2RARO0 5952 0948 MP17 9211 0046 2 7 IN LG 8 625 IN WD 28480 9211 0046 wi 8120 3864 24 AWG 4 COND 28480 8120 3804 See introduction to this section for ordering information Indicates factory selected value Replaceable Parts Model 85020A B 85020A B MP10 MP9 ON BACK 3 MP3 N
17. 02 21905 HPBB 88 Cabie HEWPACK Rio de Janego ACH CM E MS P CANADA Alberta Hewiett Packar Canada Lid 210 7220 Fisher Street SE CALGARY Alberta 12H ZHE Tel 403 283 27 13 ACH CME MS P Hewloti Packard Canada Lie 115294 168th Street EDMONTON Alberta T5M 279 Tel 403 452 3670 A CH CM CS E MS P British Columbia Hewlett Packard 1Caneda Lid 10691 Shellbridge Way RICHMOND British Columbia VBX 297 Tel 804 270 2277 Telex 610 822 5056 ACH CM OSE 445 P Manitoba Hewlett Packard Canada Lid 380 550 Century Street WINNIPEG Manitoba RSH OY t Tet 264 786 6701 ACHEMEMSP Nova Scotia Hewlett Packard Garadaj tid PD Box 931 906 Windmil Road DARTHOUTH Nova Scotia B2Y 376 Tei 902 469 7820 Telex 01931470 CH OM GSE MS P Ontarlo Hewiell Packard Canada Ltd 552 Newbold Street LONDON Ontario N6E 285 Tel 519 696 9181 A CH CME MS P Hewietl Packard Canada Lid 8877 Goreway Drive MISSISSAUGA Ontario L4V 1M8 Tel 1416 678 9430 Telex 06983644 ASHEMESEMPP Hewlett Packard Canada Ltd 2679 Queensview Dr OTTAWA Ontario K2B 8X Tek 1613 820 6483 ACH OM OS E MSP Quebec Hewlett Packard Canada Ltd 17500 South Service Road Trans Canada Highway KIRKLAND Quebec HIJ 2M5 Tel 514 697 4232 Telex 0582152 A CHCM CS E MP P CHILE Jorge Calcagni y Cia Lida Ariwo Burtde 065 Casita 18475 SANTIAGO 8 Tet 222 0222 Telex Public Booth 0001 ACMEM C
18. 1027 512927 Telex 2894 MUSKO PR Cable COOPERATOR Karachi AEMP PANAMA Electr nico Balboa SA Calle Samuel Lewis Ed Alfa Apartado 4926 PANAMA 5 Tet 84 2700 Telex 3438 ELECTRON PG ACMEMP PERU Ce Electo M gica S A Los Fismencos 148 San Is cto Casilla 1030 LIMA 1 Tet 41 4325 41 3702 Telex Pub Booth 25306 ACHEMP PHILIPPINES The Online Advanced Systems Corporation Rica House Amorsolo Cor Herrera Street Legaspi village Makat P O Box 1510 Metro MANILA Tei 85 35 81 85 34 91 88 32 21 Telex 3274 ONLINE ACHES EM POLAND Buro Informasji Techmcznej Hewlet Packatd UW Stawki 2 6P PLOO 950 WARSZAWA Tel 3959 62 39 67 43 Telex 812453 bepa pi PORTUGAL Telecta Empresa T cnica de Equipmentos El ctricos Sati Rua Rodrigo de Fonseca 103 PG Box 2531 P LISBON 1 Ter 18 68 60 22 Telex 12598 CHOSEP ROMANIA Hewel Packard Reprezentanta Bowevard Mcolae Balcescu 16 BUCURESTI Tel 130725 Telex 10445 SAUDI ARABIA Modern Electronic Estabishment P G Box 193 AL KHOBAR Tei 864 4578 Telex 870136 Cabie ELECTA AL KHOBAR CHCSEMP Modern Electronic Establisiment EQ Box 1228 Baghdadiah Steer JEDDAR Tol 842 0229 Telex 201035 Cable ELECTA JEDDAH CRCSEMP Moder Electronic Establishment DO Box 2728 RIYADH Tei 431 9715 491 6387 Telex 200756 CHCSEMP SCOTLAND Hewlett Packard Lid SOUTH QUEENSFERRY Wes Lothian EH3G 9GT G8 Scotisnd Tel 1031 3311138
19. 2950 0001 8 1 NIT HEX DBL CHAM 38 er H 2950 0001 MP6 2190 0016 3 1 WASHER LK INTL 7 1N I5S 2199 0016 MP 0350 1190 5 I TERMINAL SUDR R 43 8 SCR 0360 1199 MP8 0515 0823 amp 4 SCREW THD RLG G 0515 0823 MPS 1531 0289 5 L BRIDGE SPACER 1531 0289 MPi0 0515 0820 5 4 SCREW MACH M2 9635X M2 5 MP ELLE 7121 4309 5 i 85020A IDENTIFICATION L 7121 4309 MPI2 1400 9249 9 i CABLE TIE 062 625 DIA PLT M B MPI3 1540 0181 5 E 1540 0181 MP14 85020 80001 i 7 i 85020 80001 MPLS 7121 4311 9 7121 4311 MPi6 5952 0948 9 1 i 5952 0948 MPi7 9211 0046 2 i N LG B 625 IN WD 9211 0046 wi 8120 3804 T 4 COND 8120 3804 See introduction to this section for ordering information Indicates factory selected value Model 85020A B Replaceable Parts A Table 6 3B Model 85020B Replaceable Parts Reference HP Part jc Q e 29 Mir A t Description Mfr Part Number Designation Number D y H Code 5086 7391 3 BRIDGE ASSEMBLY INCLUDES CONNECTORS 28480 5086 7391 Jl AND J2 AND REFERENCE TERMENATION ATI Al 5085 6391 A REBUILT 5086 7391 28480 5086 5391 2 85020 60001 5 BOARD ASSEMBLY PREAMPLIFLER 28489 85020 60001 A2C 0180 2794 5 CAPACITOR FXD 3 30F 203 35VDC TA 28480 0186 2794 A2CZ 0180 2794 5 CAPACITOR PFXD 3 3UF 20 35VDC TA Be 0180 2794 A2C3 0160 3878 6 CAPACITOR FXD 1009PF 20 igovne CER 0150 3878 A2CR 1901 005
20. 35802 Tel 205 981 4594 CHEM ESEM Arizona Kewietl Packard Co 2336 East Magnosa Street PHOENIX A7 85034 Tel 602 273 8900 A CHCHCS E MS Hewlett Packard Do 2424 East Aragon Road TUCSON AZ 85706 Tel 602 489 463 CHEMS Cailfornia Hewiell Packard 00 7821 Saraga Avenue CANDGA PARK CA 91304 Tet 213 702 8300 ACHCSEPR Hewiett Packasd Co 1430 ast Orangethorpe FULLERTON CA 9253 Tet 754 R70 3000 CH CM CS E MP Hewlett Packard Co 3939 Lankershira Blvd NORTH HOLLYWOOD CA 91504 Fal 213 877 1282 Regional Headquarters Hewlett Packard Co 3200 Hifiview Avenue PALO ALTO CA 94304 Tel 418 657 8000 CRCSE Hewlett Packard Co 546 Y North Market Boulevard SACRAMENTO CA 95834 fel 918 929 7222 A CHOSE MS Hewlett Packard Co 9606 Aero Drive PO Box 23333 SAN DIEGO CA 82123 Yel 714 279 3200 CH CM CS E MP Hewtell Packard Co 3903 Scott Boulevard SANTA CLARA CA 95050 Tel 09 988 7006 A CH CM CS E MP Colorado Bewiall Packard Co 24 invetness Place East ENGUEWODD CO 80112 Tet 303 771 3455 ACH CM OS ZAS Connecticut Hewlett Packard Co 47 Barnes hdustnat Roag South PO Box 5007 WALLINGFORD CT 06492 Fel 203 265 7304 ACH CM CS E MS Fiorida Hewlett Packard Co 7 0 Box 24219 2901 N W 62nd Street FORT LAUDERDALE FL 33307 Tel 1995 973 2606 CHOSE MP Hewiell Packatd Go 4080 Woodcock Drive 132 Brownet Bading SACKSONVILLE FL 32207 Tei 1954 199 0653 EEMS
21. A Replaceable Parts Reference HP Part ic Q 5 t Description Mfr Part Number Designation Number D Y p 5086 7315 3 1 BRIDGE ASSEMBLY INCLUDES CONNECTORS 5086 7375 Jl AND 72 AND REFERENCE TERMINATION ATL Al 5086 6375 1 REBUILT 5086 7375 5086 6375 A2 85020 60001 5 H BOARD ASSEMBLY PREAMPLIFIER 85020 60001 A2CI 0130 2794 5 2 CAPACITOR FXD 3 3UF 20 35VDC TA 0180 2794 A2C2 0180 2794 5 CAPACITOR FXD 3 3UF 20 35VDC TA 0180 2794 A2C3 9165 3878 6 1 CAPACITOR FXD 1000PF 20 100VDC CER 0160 3878 A2CRL 1901 0050 3 2 OTODE SHITCHING 80V 200MA 2NS DO 35 1901 0056 A2CR2 1901 0050 3 DIODE SWITCHING 80V 200MA 2NS DO 35 A2RI 0698 7205 0 1 RESISTOR 51 1 i 05W P TC 04100 A2R2 2199 3210 6 i RESTSTOR TRMR LORK 10 C TOP ADJ l TRN A2R3 0698 7248 1 1 RESISTOR 3 16X 1 OSW F TC 04 100 A2R4 2100 3253 7 1 RESISTOR TRMR 50K 10 C TOP ADJ l TRN 2100 3253 A2R5 0698 7212 9 l RESISTOR 100 1 05wW F TCROting C3 1 8 TO 100R F A2Ui1 1826 0932 9 i TC OP AMP PRCN 8 DIP C PKG OP27F7 A2TP Pi 0360 0535 6 H TERMINAL TEST POINT 330 0360 9535 MPR 5001 1590 4 1 DRESS COVER 5001 1590 MP2 7100 1275 4 1 END COVER 7100 1275 MP3 5021 3587 5 1 FEXTRUDED FRAME 5021 3587 MP4 7100 1276 5 1 PORT COVER 7100 1276 MPS
22. ABLE 1 33 Additional equipment available for use with the 8756A Scalar Network Analyzer and the 85020A B Directional Bridges is listed in Section I of the 8756A Operating and Service Manual 1 34 ACCESSORIES AVAILABLE 1 35 Table 1 3 lists 85023 series System Verification Sets available for use with the 85020A B and the 8756A These accessory sets are supplied in a 50 ohm version and a 75 ohm version to correspond with the impedance of the bridges Each set contains a high quality adapter a standard short circuit a matched termination and a 50 ohm 10 dB pad In addition the 50 ohm version includes a standard open circuit and the 75 ohm version includes a 50 ohm to 75 ohm minimum loss pad 1 36 RECOMMENDED TEST EQUIPMENT 1 37 Table 1 4 lists recommended test equipment This equipment is used in performance testing of the 85020A B Other equipment may be substituted provided its specifications equal or exceed the specifications given in the Critical Specifications column 1 38 WARRANTY 1 39 Any attempt to perform any disassemblv or repair procedure not clearly outlined in Section VIII Service of this manual will automatically void the warranty 1 40 Subjection of the instrument to RF input power levels in excess of 23 dBm will automatically void the warrantv 1 7 General Information Model 85020A B Table 1 1 Specifications Frequency Range GHz 0 01 to 4 3 E Input Connector Type N Type N 50 ohms
23. Fipor 5 4 20 Nishinakajima Yogogawa ky OSAKA 532 Tel 06 304 6021 Telex YHPOSA 523 3524 A CH CM CS E MP P Yoxogawa Hewetl Packard tid 27 15 t chome Yabe SAGAMIHARASHI PREF 229 Tel 427 5913 1 Telex 6912 Qu Yokogawa Hewlett Packard i td Shanjuku Dai ichi Seime SF 2 7 1 Nishi Shinjuku Shinjkg ku TOKYO 160 Tet 03 348 4611 5 CHE Yokogawa Hewlett Packard Ltd 3 29 21 Takaido Higash Suginami Au TOKYO 168 Tel 03 331 8111 Telex 232 2024 YHPTOK A CH CM CSE MP P Yoh ogswa Hewiell Packard id Yasudaseime Yokohama Nishiguchi Bldg 3 304 fsutuya che Kanagawa ku YOKOHAMA Kanagawa 221 Tel 045 312 1252 CHROME JORDAN Mouasher Cousins Company DO Box 1387 AMAN Tet 24907 39907 Telex 2 1456 SABCG JO DREAMS KENYA ADCOM Lid Inc City House Wabera Street P O0 Bax 30635 RAROS Tet 331955 Telex 22638 EM KOREA Samsung Electronics Computer Division 78 56 Yooksam Dong Kangnam Ku LPO Box 2775 SEOUL Tet 585 7555 558 5447 Telex K27364 SAMSAN A CHOM CS EMP KUWAIT Al Khalidya Trading Contracting PO Box 830 Safat KUWAIT Yet 42 4810 41 1725 Telex 2481 Areeg kt CHEM LUXEMBOURG Hewiell Packard Belgium SA AN Det de la Woluwe 190 Wolywnda B 1200 BRUSSELS Tet 102 762 32 00 Teiex 23 494 paipben bru A CHEM CS E MEP MALAYSIA Hewlett Packard Sales Malaysia San D Ist Floor Bangunan British Ametican Jaian Semantan Bamansara H
24. H CM CS MP Michigan Kewlett Pack art Co 23855 Research Dave FARMINGTON HILLS MI 48524 tel 313 476 6400 A CH CAES E MP Minnesota Hewiell Packard Co 2025 W tatpenteur Ave ST PAUL MN 551393 Tet 520 544 1300 ACHOM US EMP Missouri Hewlett Packard Co 11135 Colorado Avenue KANSAS CITY MO 64137 Tel 8163 763 8006 Teiex 810 771 2087 ACH CM CS MS Hewlett Packard Co 1024 Executive Parkway ST LOUIS MO 63541 Tel 1141 878 0206 ACHCS E MP Now Jersey Hewiett Pauxard Co Crystat Brook Protessionat Bulking Route 35 EATONTOWN NJ 07724 Tel 201 542 1384 A CEP Hewiell Packard Co W428 Century Road PARAMUS NJ 07552 Fel 261 255 5000 ACHOMOSEMP Hewlett Packard Co 69 New England Av West PISCATAWAY Nj 08854 Tel 203 881 1190 A CH CM CS E New M xico Hewlett Packard Co PD Box 11534 ALBUQUERQUE NM 87112 11300 Lomas Blvd N E ALBUQUERQUE NM 87 123 Te 505 292 1330 Telex 930 989 1185 CHOSE MS Now York Hewiell Packard Co 5 Computer Drive South ALBANY NY 12205 Tei 558 458 1550 Telex 740 444 4897 ACHEMS Hewlett Packard Co 200 Gross Keys Office FAIRPORT NY 14450 Tal 7 16 223 9950 Telex 510 253 0002 CH CM OS E MS Hewlett Packard Co 7641 Henry Clay Blvd LIVERPOOL NY 13088 Tet 915 451 1820 ACA OM EMS Hewlett Packard Co No 1 Pennsylvania Plaza 55th floor 3415 Street amp Bih Avenue NEW YORK NY 10119 Fet 1212 971 0806 CHOSE M Hewlett Packar
25. HINA Psople a Republic of China Hewlett Packard Rep Office P O Box 418 IA Lane 2 Luchang St Beiwei Ad Sms District BENING fel 33 1947 33 7426 Telex 22601 CTSHP CN Cable 1920 A CHCM COEP COLOMBIA instrumentaci n H A Langebaek amp Kier S A Carrera 7 No 48 75 Apariado Aereo 6287 BOGOTA 1 D E Tet 287 8877 Telex 44400 INST CO Cabie AARIS Bogota ACH EMP COSTA RICA Cientifica Costarricense S A Avenida 2 Calle 5 San Pedro de Montes de Oca Apartado 10159 SAN JOSE Tel 24 38 20 24 08 19 Telex 2367 GALGUR CME CYPRUS Teterexa Lid PD Box 4809 140 Stassinos Avenue NICOSU Tel 52598 Telex 2894 Levidocy EMP CZECHOSLOVAKIA Hewiett Pack ard Obchodr Zasiupitelstvi v CSSR Post schranka 27 CS 8 61 PRAKA Gr Tel 66 296 Telex 121353 IHC DENMARK Hewlett Packard A S Detavaj 52 DK 3460 Bihurod Tet 102 61 66 40 Telex 37409 hpas dk ACH OM US E US P Hewiett Packard A S Navervej t OK 8600 SILKEBORG Tel 106 62 7 1 66 Teiex 37409 hpas dk SH CM E ECUADOR CYEDE Cia Ltda Avenida Eloy Alfaro 1749 Casilla 6423 CO QUITO Tei 450 975 243 052 Telex 2548 CYEDE ED ACMEP EGYPT dntethabonal Engineering Associates 24 Hussem Hegazi Street Kasr ehAini CARO Tel 23 829 Telex 83830 CKOSEM EL SALVADOR PESA de El Salvador S A 29 Avenida Norte 1216 SAN SALVADOR Tei 26 6858 26 6868 Telex Public Booth 20107 AGH CMCS EP FINLAND Hewlett Packard Qy Revont
26. LI MOD On the Scalar Network Analvzer press PRESET then turn off Channel 2 by pressino SHIFT and Channel 2 MEAS RATIO On the 8350A 8 Sweep Oscillator set the START and STOP frequencies to correspond to the first bana of freauencies in the Performance Test Record 0 01 to 1 3 GHz Perform an open short calibration using the correct equipment listed above for the respective Directional Rridges For OPEN calibration of the 85020B leave the test port unterminated Connect the Directional Bridge under test to the first Directional Bridge TEST port to TEST port using an adapter Leave the cable of the Directional Bridge under test unconnected Connect a matched load to the input port of the Directional Bridae under test On the 8756A press SHIFT SCALE for the AUTOSCALE function then press CURSOR CURSOR MAX 1 to find the point of minimum return loss the hiah point on the trace Use the reflectometer calculator to convert this measured return loss Model 85020A B Performance Tests to SWR Enter this value on the Performance Test Record Table 4 1 On the Sweep Oscillator set the START and STOP frequencies to the next band of interest listed on the Performance Test Record Repeat steps 4 through 7 for each frequency band Performance Tests Model 85020A B Table 4 1 Performance Test Record DIRECTIVITY Scalar Sum of Upper Limit Frequency Range Step Directivity Signals from Fig 4 2 0 01 to 2 4 GHz
27. OT SHOWN 4 PLACES Ji MP8 4 Ge MP5 A2 CAUTION Input Connector Jl and Test Port Connector J2 are precision connectors and are not Separately replaceable Do not disassemble J1 or J2 or attempt to replace them or any of their component parts Any attempt to perform any disassembly or repair procedure not clearly outlined in Section VIII Service of this manual will automatically void the warranty Damaged connectors can be repaired or replaced only by Hewlett Packard Figure 6 1 85020A B Replaceable Parts Identification Model 85020A B Manual Changes SECTION VII MANUAL BACKDATING CHANGES 7 1 INTRODUCTION 7 2 This section of the manual normally contains backdating information to adapt the manual so that it applies to earlier versions or configurations of the instrument which may be slightly different in design or appearance Later versions of the instrument will be documented in a yellow Manual Changes supplement 7 3 Since there are no earlier versions of the HP Model 85020A B Directional Bridge this manual applies directly to all instruments manufactured before the print date and therefore no change information is given here Refer to INSTRUMENTS COVERED BY MANUAL in Section I for additional information about Manual Changes sunplements and changes keyed to specific serial numbers 7 1 7 2 Model 85020A B Service SECTION VIII SERVICE 8 1 INTRODUCTION 8 2 This section provides instructi
28. Telex 72882 A CH CM CS EM SINGAPORE Hewlett Packard Singapore Pty 1 Ltd P O Sox 58 Alexandra Posl Office SINGAPORE 9 118 Sth Floor Inchgape House 450 482 Alexandra Road SINGAPORE 0515 Tel 631788 Telex HPSGSO 8S 34209 Cabie HEWPACK Singapore ACHOS EMS P SOUTH AFRICA Homies Packard South frica Pty Lid PO Box 226 Howard Page Pere Park Center Forest Dave Pinelands CAPE PROVINCE 7450 Tei 53 7955 53 7955 52 7967 Telex 5720008 ACH CM E MS P Hewleil Packard South Arica Ply itg PO Box 33345 Glenslanl 0070 TRANSYAAL ist Moor East Constantia Park Arge Shoppsng Seake Conslanta Park PRETORIA Tel 982043 Teiex 32383 CHE Hewiet Packard South Africa Di Lig Private Bag Wendywood SANDTON 2144 Tet 802 5111 802 5125 Telex 4 20877 Cable HEWPACK Johannesburg A OH CM CS E MS P UJ SALES amp SUPPORT OFFICES SPAIN Hewlett Packard Espa ola SA c Entenza 321 E BARCELONA 29 Tet 3 322 2451 321 73 54 Teiex 52603 hpbee ACH CM CS E MS P Hewlett Packard Espa ola S A c San Vicente S N Edificio Aba 37 E E BILBAO I Tet 4 23 8306 14 23 8208 ACH EME MS Hewlett Packard Espa ota S A Calle jerez 3 HAORID 16 Tel 1 658 2600 Telex 23574 hpe ACME SWEDEN Hewlett Packard Schweiz AG Skalholisgatan 9 Kista Box 9 S 6393 SPANG Tel 68 750 2006 Telex 884 3072 ACH CMCS E MS P Hewlett Packard Sverige 48 Fr tallsgatar 30 5 42 332 VASTRA
29. ace Retrofit kits are available from Hewlett Packard to update the 8350A for interface performance comparable to the 8350B 1 27 The Model 8340A Synthesized Sweeper is an analog sweep synthesizer that generates synthesized output frequencies from 0 01 to 26 5 GHz It is a complete swept signal source requiring no additional equipment The 8340A is fully HP IB programmable and can be controlled by the 8756A through the 8756 System Interface The 8340A can be squarewave modulated at 27 8 kHz with the Modulator Drive signal from the 8756A or 8755C Network Analyzer 1 28 Detectors 1 29 One or more Model 11664A detectors are used with the 8756A or the 8755C and the 85020A B Directional Bridaes for making RF transmission measurements The 27 8 kHz modulated sianal from the device under test is applied to the 11664A detector s on the Scalar Network Analvzer inputs The 11664A demodulates this signal to produce a 27 8 kHz square wave whose peak to peak voltage corresponds to the maqnitude of the signal at the detector input 1 6 Model 85020A B General Information Each detector uses a biased Schottky diode to achieve 50 dBm sensitivity The freauencv range of the 11664A is 0 01 to 18 GHz 1 30 Power Splitter 1 31 Ratio measurements can be obtained using a power splitter in conjunction with the scalar network analvzer and detector s The HP Model 11667A power splitter has a frequency range of DC to 18 GHz 1 32 EQUIPMENT AVAIL
30. ack of the instrument 8 Remove the bridge microcircuit from the extruded frame by tilting it up to clear the vreamplifier assembly Take care not to lose the stainless steel spacer under the microcircuit assembly WHITE RED Figure 8 6 Al Bridge Microcircuit Assembly To install the reolacement bridge assembly proceed as follows 1 Install the spacer over the screw holes and the bridge assemblv in the instrument frame over the soacer 2 Replace the four screws 3 Remove the protective backing from the aluminum foil and anplv it to the back of the frame 8 12 Model 85020A B Service 4 Remove the protective backina from the new serial number label and applv it over the foil backing 5 Solder the preamplifier wires back into place Solder the white red wire to pin 2 on the bridae housina see Fiqure 8 6 Solder the white black wires to vin 1 and the bottom of the solder lug Be sure that pin 1 and the solder lua are wired together 6 Slide the dress cover back into place 7 Replace the port cover and its screws 8 Perform the preamplifier adjustment procedure outlined below 8 13 Service Model 85020A B Preamplifier Adjustment Following Replacement of the Bridge Microcircuit Normally no adjustments are required on the 85020A B Directional Bridges However if the internal bridge microcircuit is renlaced the adjustment described here should be performed to compensate the preamplifier for the individu
31. al diode characteristics NOTE Allow the equipment to warm up for 30 minutes before performing this adjustment Description The input impedance and gain of the preamplifier assembly are adjusted alternately with the Z and GAIN potentiometers while the attenuator tracking is observed on the Network Analyzer display SWEEP OUT IN SCALAR SWEEP 0 0 8 i NETWORK OSCILLATOR no ae 3 d ANALYZER es P H 3 b I BRIDGE Figure 8 7 Preamplifier Assembly Adjustment Setup Equipment Scalar Network Analyzer 5 a e e a a 2 HP 8756A Sweep Osciilator ar er EG ee ic w HP 8350A B RF Plug In EP ee ee s n HP 83522A 83525A B Step Attenuator HP 8495A Opt 001 Calibrated 50 Ohm to 75 Ohm Minimum Loss Pad SOLOS ORLY Jule dude AO lel UE Sec ndo a UR HP 11852A 8 14 Model 85020A B Service Procedure l Remove the silicone rubber seal from the two potentiometers to gain access to the screwdriver slots 2 Connect the equipment as shown in Fiqure 8 7 If the Directional Bridge is an 85020B connect the Model 11852A 50 ohm to 75 ohm minimum loss pad between the step attenuator and the input port of the Directional Bridge Allow the equipment to warm up for 30 minutes 3 On the 8350A B press INSTR PRESET SHIFT CW 2 0 0 MHz to set the signal to swept CW Press SWEEP TIME 1 5 01 ms Press LI MOD to turn on squarewave modulation 4 Set the 8756A as follows
32. are described Power cable replacement Preamplifier assembly replacement Replacement of the bridge microcircuit assembly Preamplifier adjustment following replacement of the bridge microcircuit assembly Model 85020A B Service 2 THEORY OF OPERATION Al Bridge Circuit RF INPUT v 75Q IN 850208 PORT Ji 750 500 500 750 BALANCE ARM O TEST PORT J2 REFERENCE TERMINATION 500 750 TO PREAMP ASSEMBLY Figure 8 1 Al Bridge Circuit Schematic Diagram The 85020A B Directional Bridae is a broadband device used to measure return loss The voltage across the balance arm see Figure 8 1 is proportional to the return loss of the device under test Placing a diode across the balance arm enables the conversion of the microwave voltage to a 27 kHz sauare wave whose amplitude is proportional to the return loss The 1000 ohm isolation resistors and the 1000 pF capacitors serve to isolate the balanced detector from the Network Analyzer This buffers the output reducing the imbalance across the center arm created by the ground on one side of the output and the preamplifier connection on the other Two varameters which define the quality of the bridge are Directivity and Source Match Directivity is a measure of the residual error in the bridge When the test vort is terminated in a perfect matched impedance load the detector diode should read zero However because of non symmetry due to resistor imbalances component placem
33. ation where some degradation of directivity can be accepted For the most accurate measurements a high quality adapter should be used and the adapter should be periodically replaced High quality adapters low insertion loss low return loss stable in use and durable are necessary to achieve accurate repeatable measurements Calibrate for measurement using the same adapters and interconnect cables that will be used during measurement To ensure repeatable measurements the adapters and cables must be clean in good condition and properly tightened Start with the best available adapters and calibration standards then replace them when they become unstable Appropriate adapters are included in the 85023 series System Verification Sets listed in Section I of this manual 3 8 The input port connector and the test port connector are part of the microcircuit bridae assembly This assembly may be replaced with a new or a rebuilt assemblv For information Model 85020A B Operation concerning exchange assemblies refer to Section VI Replaceable Parts of this manual 3 9 The connectors are not separately replaceable Because they are precision connectors and have contact internally with the bridge microcircuit they cannot be repaired in the field An attempt to replace or repair the connectors will probably cause damage to the bridge microcircuit In addition special fixtures are required for reassembly For repair or replacement of any conn
34. atures from 0 C to 55 C 2 15 Humidity The instrument may be operated in environments with humidity from 5 to 80 relative at 25 C to 40 C However the instrument should also be protected from temperature extremes which cause condensation within the instrument 2 16 Altitude The instrument may be operated at altitudes un to 4572 meters 15 000 feet 2 17 STORAGE AND SHIPMENT 2 18 Environment 2 19 The instrument may be stored or shipped in environments within the following limits Temperature e e e D a D D e D e D 40 C to 75 C Humidity eek et er wet Be 53 to 953 relative at 0 to 40 C Altitude cu Wa ee ve MeL Up to 15240 meters 50 000 feet 2 20 The instrument should also be protected from temperature extremes which may cause condensation in the instrument Model 85020A B Installation 2 21 Packaging 2 22 Original Packaging Containers and materials identical to those used in factory vackaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing attach a tag indicating the tvpe of service required return address model number and full serial number located on the rear panel serial label Mark the container FRAGILE to ensure careful handling In anv correspondence refer to the instrument by model number and full serial number 2 23 Other Packaging The following general instructions should be used for repackaging with comme
35. blies for both Directional Bridges together with the part numbers for the exchange assemblies Exchange factory repaired and tested assemblies are available only on a trade in basis therefore the defective assemblies must be returned for credit For this reason assemblies required for spare parts stock must be ordered by the new assembly part number 6 5 ABBREVIATIONS 6 6 Table 6 2 contains three major sections Reference Designations expands the desianators used in the parts list Abbreviations defines all abbreviations used in the descriptions of replaceable parts Manufacturers Code List references the name and address of a typical manufacturer with the code number provided in the parts list 6 7 REPLACEABLE PARTS LISTS 6 8 Tables 6 3A B are the lists of replaceable parts for the 85020A and 85020B respectively and are organized as follows a Electrical assemblies and their components in alpha numerical order bv reference designation b Chassis mounted parts in aloha numerical order by reference designation C Miscellaneous parts Replaceable Parts Model 85020A B 6 9 The information given for each part consists of the followina a The Hewlett Packard part number b Part number check digit CD C The total quantity Qty in the instrument d The description of the part e A typical manufacturer of the part in a five diqit code f The manufacturer s number for the part 6 10 The total quantity f
36. d 85020B are Directional Bridges designed to be used in conjunction with the Hewlett Packard Model 8756A and 8755C Scalar Network Analyzers for making scalar reflection and transmission measurements A single zero biased Schottky diode detector in the bridae samples the return loss of a device under test for reflection measurements Transmission measurements can be made with the addition of a detector A power splitter can be used with the bridge for ratio measurements A swept RF input sianal is supplied by a sweep oscillator or a synthesized sweeper 1 15 The 85020A is a 50 ohm bridge with a frequency range of 10 MHz to 4 3 GHz Both the input connector and the test port Model 85020A B General Information connector are type N female The 85020B is a 75 ohm bridge with a freauency range of 10 MHz to 2 4 GHz The connectors are both type N female 1 16 EQUIPMENT SUPPLIED 1 17 The 85020A and 85020B Directional Bridges are each supplied in an instrument case as illustrated in Fiqure 1 1 1 18 EQUIPMENT REQUIRED BUT NOT SUPPLIED 1 19 The following equipment is required for use with the 85020A B in making transmission and reflection measurements HP Model 8756A or 8755C Scalar Network Analyzer HP Model 8350A B Sweep Oscillator or 8340A Synthesized Sweeper HP Model 11664A detector 0 01 to 18 GHz e HP Model 85023C D System Verification Kit see Table 1 3 1 20 Scalar Network Analyzer 1 21 The Model 8756A Scalar Ne
37. d Co 3 Crossways Park West WOODBURY NY 11797 Tel 1516 921 0300 Telex 519 221 2183 ACH CM CS E MS North Caroilna Hewlett Packard Co DO Box 26500 5605 Roanne Way GREENSBORO NC 27450 Tel 1919 852 1800 A CH CM CS E MS Ohio Hewlett Packard Co 18500 Sprague Road CLEVELAND OH 4130 Tel 216 243 7300 Telex 810 423 9430 A CH CM CS E MS Hewlett Packard Co 982 Grupper Ave COLUMBUS OH 43229 Tel 614 436 1041 CH OM CSE Hewietl Packatd Co PO Box 286 336 Progress Rd DAYTON OH 45449 Tet 513 859 8292 ACH CME MS Oklahoma Hewiei Packard Co SO 8 32008 OKLAHOMA CITY OK 73123 304 N Mendian Avenue Suite A OKLAHOMA CITY OK 73507 Tel 405 946 9499 AY SHE MS Oregon Hewell Packard Co 9255 S W Pioneer Court WILSONVILLE OR 97970 Tei 503 582 8000 ADLCSE M Pennsyivenla Hewiell Packatd Co 1021 Bih Avenue King of Prussia Industiiai Park KING OF PRUSSIA PA 19458 Tei 215 265 7000 Telex 510 560 2670 ACH CMOS EMP Hewlett Packard Co 151 Zeta Drive PITTSBURGH PA 15238 Tel 412 782 0400 ACH CSE MP South Caroline Hewiett Packard Co PO Box 21708 Brookside Parx Suite 122 1 Harbison Way COLUMBIA SC 29210 e 803 732 0400 CHEMS Texas Hewlett Packard Co Suite 310 7806 Shoalszeek Bivd AUSTIN TX 78757 Tel 512 459 3163 Hewlett Packatd Co Suite C110 417 t North Mesa EL PASO TX 79902 Yet 915 533 3555 533 4489 SKE MS Heudet Packard
38. d Trade Center MEDITERRANEAN AND MIDDLE EAST Hewiett Packard SA Mediterranean and Middle East Operations Atina Centre 32 Kilissias Ave Amaroussion ATHENS Greece Ter 808 0359 808 0429 Telex 21 6586 Cab e HEWPACKSA Athens Hewlett Packard Co 4 Choke Cherry Road Rockyilie MD 26850 Tek 301 258 2000 MIDWESTERN USA Hewlett Packard Co 3261 Tollvew Drive ROLLING MEADOWS 60008 Tet 312 255 9800 SOUTHERN USA Hewlett Packard Co PD Box 105005 450 Interstate N Parkway ATLANTA GA 30339 Tel 404 955 1500 WESTERN USA Hewlett Packard Co 3939 Lankersim Blvd LOS ANGELES CA 91504 Tek 12131 877 1282 OTHER INTERNATIONAL AREAS Hewlett Packard Co Intercontinental Headquarters 3495 Deer Creek Road PALO ALTO CA 94304 Tel 418 857 1501 Telex 034 8300 Cable HEWPACK 14 April 1982
39. e 1 1 shows the Model 85020A in the accessory instrument case supplied with each instrument Figure 1 2 shows both the 85020A and the 85020B Directional Bridges 1 3 On the title page of this manual is a microfiche part number This number may be used to order 10 by 15 centimeter 4 by 6 inch microfilm transparencies of the manual Each microfiche contains up to 60 photo duplicates of the manual pages The microfiche package also includes the latest Manual Changes supplement as well as all pertinent Service Notes 1 4 Refer any questions regarding this manual the Manual Changes supplement or the instrument to the nearest HP Sales Service Office Always identify the instrument bv model number complete name and complete serial number in all correspondence Refer to the inside rear cover of this manual for a worldwide listing of HP Sales Service Offices 1 5 SPECIFICATIONS 1 6 Specifications for the 85020A B are listed in Table 1 1 These specifications are performance standards or limits against which the instrument may be tested Table 1 2 lists supplemental characteristics These are not specifications but are intended to provide information useful in applying the instrument by giving typical but non warranted performance parameters 1 7 SAFETY CONSIDERATIONS 1 8 The voltages present in the 85020A B are not in a range to warrant more than normal caution General Information Model 85020A B CAUTION The CAUTION sign in t
40. e 4 3 TEST Port SWR Test Setup Equipment Sweep Oscillator ga o Se ANE Ger x HP 8350A B RF Plug In gr a GT GE FE G GSE VG HP 83522A 83525A B Scalar Network Analyzer a e s gt gt HP 8756A Directional Bridae Gat fe o ar HP 85020A R Adapter Type N m to Type N m M Bee AU set te HP 1250 1475 A second Directional Bridge of the same type is required as a test instrument in addition to the Directional Bridge under test Performance Tests Model 85020A B Equipment continued For Use with 85020A 50 Ohm 50 Ohm Type N Short ss ze vow e e a HP 11512A 50 Ohm Shielded Open P HP 85032 60001 50 Ohm Termination CH E E PE HP 909A Opt 012 For Use with 85020B 75 Ohm 50 Ohm to 75 Ohm Minimum Loss Pad a a HP 11852A 75 00m TyDeeN Short va x RR es i HP 1250 1530 75 Ohm Termination gi Ser CHE de EG decewe ce HP 1250 1532 CAUTION Do not mix 50 ohm and 75 ohm hardware as this may damage the connectors Procedure Ls 4 6 Set up the equipment as shown in Figure 4 3 with the appropriate calibrated short connected to the Directional Bridge the test device not the device under test If the Directional Bridge is an 85020B connect the Model 11852A 50 ohm to 75 ohm minimum loss pad between the output of the RF Plug In and the input port of the Directional Bridge Set up the test eguipment as follows On the Sweep Oscillator press INSTR PRESET SWEEP TIME 11 5 0 ms
41. ector return the 85020A B to Hewlett Packard 3 10 OPERATOR S CHECK 3 11 Figure 3 2 is an operator s check of the 85020A which allows the operator to make a quick check of the main system functions prior to use Figure 3 3 is an operator s check of the 85020B The procedures cover the entire measurement svstem and incorrect indications may be caused by any portion of the system If the Directional Bridge is susnected use the performance tests in Section IV to determine if the bridge is working correctly If not refer to Section VIII Service to isolate the problem 3 12 OPERATING INSTRUCTIONS 3 13 Instructions for operating the 85020A B Directional Bridge with the Model 8756A Scalar Network Analyzer are supplied in Section III of the 8756A Operating and Service Manual Figure 3 3 illustrates a typical instrument setup for transmission and reflection measurements using the 85020A B with the 8756A 3 14 The 8755C Scalar Network Analyzer may be substituted for the 8756A with the addition of the 8750A Storage Normalizer in applications where memory is required In this case the display mainframe used with the 8755C may require modification for interface with the 8750A A table of 8750A Displav Mainframe compatibility is provided in Section I of the 8755C Operating and Service Manual Figure 3 4 shows a typical measurement setup using the 8755C and the 8750A 3 15 Ratio measurements can be obtained using a power splitter in co
42. ed with an anti static surface should be used Never touch the center contacts of the connectors Tests at Hewlett Packard have revealed that repeated ESD charges as low as 250 volts can destroy microwave diodes Ordinary activities around everyday materials can generate ESD voltages of tens of thousands of volts Materials conducive to static build up include floor carpeting nylon clothing dry air paper adhesive tape styrofoam and vinyl Use of the precautions described here will considerably reduce the probability of damage from ESD 3 1 Operation Model 85020A B 3 2 Do not apply more than 23 dBm RF power or more than 10 volts DC into the 85020A B If more than this power or voltage is applied the 85020 will be damaged CAUTION Do not drop the 85020A B or subject it to mechanical shock as this may cause internal damage 3 4 FEATURES 3 5 Features of the 85020A B are shown in Figure 3 1 CAUTION Do not over tighten the connectors of the 85020A B bridges Excessive torque will deform the mating surfaces To mate type N connectors always turn only the nut of the male connector Never turn the Directional Bridge when making a connection Tighten by hand only 3 6 CONNECTOR WEAR 3 7 Repeated connections will cause the connectors to become worn with a conseauent degradation of performance To extend the Life of the connectors it is recommended that an adapter be used on the test port in any applic
43. eights KUALA LUMPUR 23 03 Tel 943022 Telex MA33015 ACHEM 2 Prote Engineering iol 319 Salok Road POBox 1917 Kuching SARAWAK Tet 53544 Telex MA 70904 PROMAL Cable PROTELENG AEM MEXICO Hewlett Packard Mexicana S A de EY Av Perferico Sur No 6501 Tepepan Xochirrsico 15020 MEXICO CITY Fal 955 676 4600 Telex 057 748 567 ACH CSE MSP MOROCCO Dolbeau 81 sue Karachi CASABLANCA Tel 304 1 82 3068 58 T lex 23051 22822 NETHERLANDS Hewlett Packard Nederland B V Van Meuven Goedharfiaan 121 NL 1 8 1KK AMSTELVEEN 2 5 Boa 667 NL 1190 AR AMSTELYEEN Tel 20 47 26 23 Telex 13 256 ACH CH CSE MP P NEW ZEALAND Hewlett Packard N 2 Ltd 169 Manukau Road 9 6 Box 26 188 Epsom AUCKLAND Tel 687 159 Tanie HEWPACK Auckland SHOME P Hewen Packard N Z Ltd 4 12 Ciuickshank Street Kilberrme WELLINGTON 3 P O Box 9443 Courtenay Place WELUNGTON 3 Taf 877 199 Cable HEWPACK Wellington CHCMEP NORWAY Hewlett Packard Norge A S Foke Bernadolteswei 50 P O Box 3558 N 5033 FYUJMOSDALEN BERGEN Tel 05 16 55 40 Telex 16621 hpnas n CHROM E Hewlett Packard Norge A S Jesterndalen 18 PO Box 34 N 1345 OESTER AS fer 02 17 11 80 Telex 1662t hpnas n Ar ONEMSP PAKISTAN Manko amp Company Ltd 1 8 Street 43 Sector F 8 1 ISLAMABAD Tel 26875 Cable FEMUS Hawabpind AEM Mushko Company Lid Qosman Chambers Abdullah Haroon Road KARACHI 0302 Tet 51
44. ent 8 3 Service Model 85020A B coaxial imbalances etc a voltage will be output to the Network Analyzer The ratio of the detected voltage with a perfect matched impedance load to the detected voltage with a short is the directivity Source Match is a measure of the impedance lookina into the test port It is usuallv given as SWR It is a function of the bridge element values and is independent of directivity that is a bridge with very qood directivitv could have poor source match A2 Preamplifier Circuit The output of the bridge circuit is a low level 27 kHz signal Before it is input to the Network Analyzer it must be amplified This is the function of the preamolifier Fiaure 8 3 is a Schematic diagram of the preamplifier A2 and Fiaure 8 2 is a preamplifier component locations diaaram The functional center of the nreamplifier circuit is a low noise operational amplifier Ul wired in the non inverting confiauration The gain of the vreamplifier is controlled bv R3 and R4 Gain 1 R4 R3 The gain may be varied from 1 to approximately 17 R4 is the GAIN adjustment and comvensates for the sensitivitv of the bridge diode The input impedance adjustment R2 Z compensates for the internal resistance of the diode The input impedance may be varied from 100 ohms to aproximately 10k ohms The 100 ohm resistor R5 and the 1000 pF capacitor C3 form a decoupling network which keeps RF signals from the inout of the operational ampl
45. ent Procedures Preamplifier Check i 10 Disconnect the power cable Wl from the Network Analyzer Unsolder the white red and white black wires from the pins on the Al bridge assemblv Measure the resistance from the input white red wire to signal ground white black wire The resistance should vary from 100 ohms to 10 000 ohms as A2R2 is adjusted through its range Measure the output resistance from TP to sianal ground The resistance should vary from 3k ohms to 53k ohms as A2R4 is adjusted through its ranae Connect the 8756A 8755C MODULATOR DRIVE output center conductor through a 1 Megohm resistor to the 85020A B A2 preamplifier input white red wire Connect the 8756A 8755C MODULATOR DRIVE output outer conductor to the 85020A B A2 preamplifier signal around white black wire Connect the 85020A B power cable Wl to the A input of the 8756A 8755C Set the 8756A 8755C channel 1 to displav the power level of input A Erase all memories from anv storage device used with the display Turn A2R2 and A2R4 fully counterclockwise The 8756A 8755C should display a noise floor of about 50dBm Turn A2R2 fully clockwise Adjust A2R4 from one end of its range to the other The display should change by about 20db If the preamplifier fails to meet any of the above conditions replace the defective components Repeat the performance tests in Section IV Service Model 85020A B REPAIR AND REPLACEMENT PROCEDURES Powe
46. essory Model Number Ha prep Type N short 11512A Type N open 85032 60001 Type N m to type N mi adapter 1250 1475 Type N 50 ohm termination 909A Opt 012 Type N 10 dB pad 8491B Opt 010 instrument case Operating Note HP Model 85023D Type N 75 Ohms For Use with Model 85020B Directional Bridge HP Part or Oty Accessory Model Number 75 ohm tvpe N short 1250 1530 Type N m to type N m adapter 1250 1475 50 ohm to 75 ohm minimum loss pad 11852A Type N 75 ohm termination 1250 1532 50 ohm type N 10 dB pad 8491B Opt 010 instrument case Operating Note Model 85020A B General Information Table 1 4 Recommended Test Equipment Critical Specifications Recommended Test Model Scalar Operating Network Frequency 27 8 kHz Analyzer 85020A B compatible Includes display Sweep Oscillator 8756A compatible 8350A B 8350A B plus RF Plug In Frequency 0 01 2 4 GHz 83522A or 83525A B or Frequency 0 01 4 3 GHz 83525A B Synthesized Sweeper Frequency 0 01 4 3 GHz 8340A 8340A Frequency 0 01 4 3 GHz 11664A 11664A System Type N 50 ohms 85023 Verification Tyne N 75 ohms 85023D Set includes 75 ohm Table 1 3 matching pad Step Frequency DC 4 0 GHz 8495A 8495A Attenuator 0 70 dB in 10 dB steps Opt 001 Opt 001 Digital Accuracy 0 01 3456A 3456A Multimeter Input Impedance gt 10M Ohms Storage For use with 8755C 8750A 8750A N
47. for the Model 85020A B Directional Bridge is obtained from the Model 8756A or 8755C Scalar Network Analyzer 2 8 Connecting the 85020A B Directional Bridge 2 9 To connect the 85020A B for operation with the 8756A or 8755C Scalar Network Analyzer and the 8350A B Sweep Oscillator proceed as follows l Secure the connector of the power cable Wl into the A R or B mating connector of the Network Analvzer by turning the outer shell clockwise to tiahten 2 Connect the RF output of the Sweep Oscillator RF Plug In to the input port of the 85020A R 2 1 Installation Model 85020A B 2 2 CAUTION Do not apply more than 23 dBm RF power or more than 10 volts DC into the 85020A B If more than this power or voltage is applied the Bridge will be damaged 3 The device under test is connected to the Bridge test port Typical measurement configurations are shown in Section ITI 2 10 Mating Connectors 2 11 The mating connectors for the precision tvve N connectors of the 85020A B are the corresponding precision tvne N connectors whose dimensions conform to US specification MIL C 39012 2 12 To extend the life of the connectors it is recommended that a precision adapter be used on the test port in any application where some dearadation of directivity can be accepted Refer to Section III Operation for more information on connector wear 2 13 Operating Environment 2 14 Temperature The instrument may be operated in temper
48. hen a fixed load termination with the best possible return loss is connected to the TEST port and the new measured value is recorded Equipment Sweep Oscillator Coe Us cH SEE EG HP 8350A R RF Plug In D D D e gt D e gt e e D HP 83522A 83525A B Scalar Network Analyzer HP 8756A For Use with 85020A 50 Ohm 50 Ohm Type N Short ve e IER s gt o HP 11512A 50 Ohm Shielded Open E E HP 85032 60001 50 Ohm Termination EL GE me 5 HP 909A Opt 012 For Use with 85020B 75 Ohm 50 Ohm to 75 Ohm Minimum Loss Pad a s HP 11852A 75 Ohm Type N Short 2 2 HP 1250 1530 75 Ohm Termination E E ee eo HP 1250 1532 CAUTION Do not mix 50 ohm and 75 ohm hardware as this may damage the connectors Model 85020A B Performance Tests asco abans anan SCALAR 220299 NETWORK 72 ANALYZER 002900 fm 7 OPEN t FIXED b LOAD Figure 4 1 Directivity Test Setup Procedure 1 Connect the eauipment as shown in Figure 4 1 If the Directional Bridae is an 85020B connect the Model 11852A 50 ohm to 75 ohm minimum loss pad between the output of the RF i Plug In and the input port of the Directional Bridge Do not i connect the fixed load termination at this time Allow the equipment to warm up for 30 minutes 2 Set up the test equioment as follows On Sweep Oscillator press INSTR PRESET SWEEP TIME 1 5 0 ms LF MOD On the RF Plug In RF
49. his manual calls attention to an operating procedure or practice which if not correctly performed or adhered to could damage or destroy the equipment Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met 1 9 INSTRUMENTS COVERED BY MANUAL 1 10 This instrument has a two part serial number The first four digits and the letter comprise the serial number prefix The last five digits form the seauential suffix that is unique to each instrument The contents of this manual applv directly to instruments with a serial number prefix aiven on the title nage under the heading SERIAL NUMBERS 1 11 An instrument manufactured after the printing of this manual may have a serial prefix that is not shown on the title page This unlisted serial prefix indicates that the instrument is different from those documented in this manual The manual for such an instrument will be supplied with a yellow Manual Changes 1 12 In addition to change information the supplement may contain information for correcting errors in the manual To keep this manual as current and accurate as possible Hewlett Packard recommends that you periodically request the latest Manual Changes supplement The supplement for this manual is keyed to the manual s print date and part number both of which appear on the title page Complimentary copies of the supplement are available from Hewlett Packard 1 13 DESCRIPTION 1 14 The 85020A an
50. hms In the 85020B the resistance should be 46 ohms 2 ohms 3 Measure the resistance from the center contact of innut connector Jl to siqnal ground the black white wire connected to the microcircuit housing In the 85020A the resistance should be 83 ohms 2 ohms In the 85020B the resistance should be 118 ohms 2 ohms 4 Measure the resistance from the center contact of test port connector J2 to sianal ground In the 85020A the resistance Should be 83 ohms 2 ohms In the 850208 the resistance should be 118 ohms 2 ohms 5 If the above resistance measurements are not correct the bridge microcircuit assemblv Al is defective and must he replaced CAUTION Do not attemot to disassemble or repair the bridge microcircuit assembly Al including connectors Jl and J2 and reference termination ATl Do not remove or loosen any screws on this assembly Any attempt to perform any disassembly or repair not clearly outlined in this manual will automatically void the warranty The bridge microcircuit assembly including input and test Model 85020A B Service port connectors and the reference termination mav be replaced on an exchange basis thus affording a considerable cost savings Refer to Section VI Replaceable Parts of this manual for the vart numbers for new and exchange assemblies The procedures for revlacement of the microcircuit and subsequent adjustment of the preamolifier are descrihed below under Repair and Replacem
51. ica CM Componente Computar Systems Ses only CH Computer Systems Hardware Saler and Services CS Computer Systema Software Sales and Services E Electronic htstruments amp Massuremem Systeme Medical Products MP Medical Products Primary SRO M5 Medical Products Secondary SAC P Persona Computation Products Sales only for specific product ne Support only for specific product tine SMPORTANT Thasa aymbois designate genera produci ine capability They do not ingura aatos of support availablity far 23 products within a line at a locations Contact your local nalen offlze for formation regarding locatione where HP support is arakabte tor speciile producto HP distributors are printed in italics ANGOLA felectta Empresa T cmca de Equpamentes El ctricos SARL Barbosa Rodrigues 414 DT Caixa Postal 6487 LUANDA Tel 36515 35516 EMP ARGENTINA Hewlett Packard Argentina S A Avenida Santa Fe 2035 Martinez 1646 BUENOS AIRES Te 798 5735 792 1293 Telex 17595 BIONAR Cable HEWPACKARG AE CHCS P AUSTRALIA Adelaide South Australia Otfice Hewlett Packard Australia Lid 153 Greenhil Road PARKSIDE S A 5063 Tel 272 5911 Telex 82536 Cabie HEWPARD Adelaide A CHEM E MSP Brisbane Quaensiand Office Hewlett Packard Australia Ltd 5th Floor Teachers Union Building 495 498 Boundary Street SPRING HILL Oveensiand 4000 Tal 229 1544 Telex 42133 Cable HEWPARD Brisbane ACR CM EMP Canber
52. ifier Rl is placed in series with the non inverting input of the operational amplifier Ul to prevent the input sional from shorting to ground through the 10k potentiometer R2 Model 85020A B Service WHITE BLACK WHITE RED Q OUTPUT Figure 8 3 A2 Preamplifier Schematic Diagram 8 5 Service Model 85020A B Recommended Action 8 6 Cable Continuity Replace Cable Wl Input and Install Replacement Bridge Circuit Test Port Resistance Repair or Replace Preamplifier Reconnect 85020A B Bridge and Retest 85020A B Bridge is repaired and ready Fail for use Return to Step 1 of this Figure Figure 8 4 Troubleshooting Flow Diagram Model 85020A B Service TROUBLESHOOTING PROCEDURES If a problem persists following the Operator s Check in Section III and the Performance Tests in Section IV perform the troubleshooting procedures outlined helow to isolate the cause and correct the problem Refer to the troubleshooting flow diagram in Figure 8 4 Instructions for repair or replacement of defective components are provided followina the troubleshootina procedures CAUTION The 85020A B Directional Bridges contain microcircuits that are highly sensitive to electrostatic discharge ESD For service purposes a work station equipped with an anti static surface must be used and a grounded wrist strap must be worn Never touch the center c
53. njunction with the scalar network analyzer and detector s Figure 3 5 illustrates a tvnical ratio measurement using a power splitter 3 16 75 OHM OPERATION 3 17 For making measurements of 75 ohm devices using the 850208 two 50 ohm to 75 ohm minimum loss matching nads are required One of these is connected between the siqnal source and the input port of the 850208 The other is connected between the device under test and the 11664A detector on the input of the Scalar Network Analyzer 3 3 Operation Model 85020A B l Test Port Connector J2 Precision Type N The device under test or a calibration short or open is connected to this point 2 Input Port Connector Jl Precision Type N The RF input signal is applied to this connector 3 Power Supply Cable Wl Supplies DC voltages to the 85020A B preamplifier and feeds a voltage proportional to the signal reflecte from the device under test to the Network Analvzer input Figure 3 1 850204 B Features Rear View Model 85020A B Operation 85020A OPERATOR S CHECK oo SCALAR NETWORK ANALYZER 1 z zs 40 dB PAD D LJ OPEN EQUIPMENT Sweep Oscillator Ki o a 8 KH o o gt HP 8350A B gt gt RF Plug In e e 4 X Scalar Network Analyzer 10 dB Attenuator n HP 8491B Option 010 Calibrated Short Circuit e a HP 11512A Shielded Open Circuit HP Part No 85032 60001 H D e D HP 83525A B ER HP 8756A D D a e D e a 9
54. ons for troubleshootina and repair of the 85020A B Directional Bridge 8 3 CAUTION NOTES 8 4 The CAUTION sian denotes a hazard to the instrument It calls attention to an operating maintenance or repair procedure which if not correctly performed or adhered to could result in damage to or destruction of vart or all of the instrument Do not proceed bevond a CAUTION sign until the indicated conditions are fully understood and met 8 5 THEORY OF OPERATION 8 6 The operation of the 85020A B is described to assist with troubleshooting procedures Schematic diagrams are suoplied for the Al directional bridge circuit and the A2 preamplifier together with a component locations diagram for the A2 preamplifier assembly 8 7 TROUBLESHOOTING 8 8 Troubleshooting the 85020A B involves performing the Operator s Check and the Performance Tests If a problem persists refer to TROUBLESHOOTING PROCEDURES later in this section The troubleshooting procedures are desianed to help the technician isolate a problem to the defective component A troubleshooting flow diagram is provided in Figure 8 4 8 9 RECOMMENDED TEST EQUIPMENT 8 10 Equipment recommended to test and maintain the instrument is listed in Section I General Information If the equipment listed is not available equioment that meets the critical specifications listed may be substituted Service Model 85020A B 8 11 REPAIR AND REPLACEMENT 8 12 The following procedures
55. ontacts of the connectors with the fingers Ground the leads of the digital multimeter by touching them to the grounded instrument chassis before makinq measurements Internal Access To obtain access to the interior of the 85020A B for troubleshooting and repair purposes proceed as follows 1 Remove the two screws holding the port cover the test port end plate 2 Remove the port cover 3 Slide the top dress cover out of the grey bridge housing The interior of the 85020A B is now accessible Cable Continuity Check 1 Use a digital multimeter DMM to check the continuity of power cable W1 from the connector pins to the wire connections inside the bridge housing Table 8 1 lists the Wl connector pins and the corresponding wires 2 If there are discontinuities in any of the wires replace cable W1 following the instructions outlined under Repair and Replacement Procedures Repeat the performance tests in Section IV 8 7 Service Model 85020A B Table 8 1 Wires in Power Cable WI CONNECTOR PIN CORRESPONDING WIRE White coax center conductor Shield coax outer conductor No connection Violet Red Input Port and Test Port Resistance Checks l Ground the leads of the DMM by touching them to the grounded instrument chassis 2 Measure the resistance from the center contact of input vort connector Jl to the center contact of test port connector J2 In the 85020A the resistance should be 33 ohms 2 o
56. or each part is given only once for each instrument at the first aopearance of the part number in the list for that instrument 6 11 ILLUSTRATIONS 6 12 Figure 6 1 Replaceable Parts Identification illustrates the locations of miscellaneous replaceable parts some of which are also listed in Tables 6 3A B These parts are denoted with reference designation prefix MP 6 13 ORDERING INFORMATION 6 14 To order a part listed in the Replaceable Parts Lists quote the Hewlett Packard part number with its check digit CD indicate the quantity and address the order to the nearest Hewlett Packard Office The check didit will ensure accurate and timely processing of vour order 6 15 To order a part that is not listed in the Replaceable Parts List include the instrument model number instrument serial number description and function of the part and the number of parts required Address the order to the nearest Hewlett Packard Office Table 6 1 Exchange Microcircuit Bridge Assemblies Includes input and test port connectors and reference termination NEW PART REBUILT EXCHANGE INSTRUMENT NUMBER PART NUMBER 85020A 5086 7375 5086 6375 85020B 5086 7391 5086 6391 Model 85020A B Replaceable Parts Table 6 2 Manufacturers Code List Reference Designations and Abbreviations MANUFACTURERS CODE LIST MFR NO MANUFACTURER NAME ADDRESS ZIP CODE ANY SATISFACTORY SUPPLIER PANDUIT CORP TINLEY PARK IL PRECISION MONOLITHICS INC SANTA
57. ormalizer where memory is required This equipment is used for performance testing adjustment and troubleshooting 1 11 1 12 Model 85020A B Installation SECTION II INSTALLATION 2 1 INTRODUCTION 2 2 This section provides information about initial inspection preparation for use mating connectors packaging storage and shipment 2 3 INITIAL INSPECTION 2 4 Inspect the shipping container for damage If the shipping container or cushioning material is damaaed it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically The contents of the shipment should be as shown in Figure 1 1 Procedures for checking electrical performance are given in Section IV Performance Tests of this Operating and Service Manual If the instrument does not pass the electrical Performance Tests and a circuit malfunction is suspected refer to Troubleshooting Procedures in Section VIII Service in this manual If the instrument does not pass the above electrical tests if the shipment contents are incomplete or if there is mechanical damage or defect notify the carrier as well as the nearest Hewlett Packard Office Keep the shipping materials for the carrier s inspection The HP Office will arrange for repair or replacement without waiting for claim settlement 2 5 PREPARATION FOR USE 2 6 Power Requirements 2 7 Power
58. power is ON On the Scalar Network Analyzer press PRESET then turn off Channel d 2 by pressing SHIFT and Channel 2 MEAS RATIO 3 On the 8350A B Sweep Oscillator set the START and STOP frequencies to correspond to the first band of frequencies in Table 4 1 the Performance Test Record 0 01 to 2 4 GHz 4 Perform an open short calibration using the correct equipment listed above for the respective Directional Bridges For OPEN calibration of the 85020B leave the test port unterminated 5 Connect the fixed load to the TEST port of the 85020A B On Performance Tests Model 85020A B the 8756A press SHIFT SCALE for the AUTOSCALF function then press CURSOR CURSOR MAX 1 to find the point of minimum return loss the high point on the trace Record the displayed CURSOR value on the Performance Test Record Table 4 1 This value represents the scalar sum of directivity Signals desired measurement plus reflected signals from the fixed load undesired error Thus fixed load quality directly affects the quality of directivity measurements Refer to Figure 4 2 The shaded areas in this fiqure indicate the probable range of measurable values for each specified directivity value On the horizontal axis locate the fixed load s reflection coefficient or its specified return loss convert from SWR if necessarv Move up from this point to the upper limit of the shaded area between the diaaonal lines Enter the value of this u
59. pper limit on the Performance Test Record Table 4 1 Allowina for the load error any directivity measurement that falls below this limit indicates that the 85020A R is probably within specifications for the frequency band of interest If the measurement falls ahove the upper limit the bridge does not meet svecifications and troubleshooting procedures should he performed On the 8350A B Sweep Oscillator set the START and STOP frequencies to the next band listed in Table 4 1 2 4 to 3 0 GHz Repeat Steps 4 and 5 Measured Value Directivit T y po 28 0 030 31 1 028 31 7 026 324 024 33 2 022 34 0 020 34 9 35 9 37 1 38 4 40 0 41 9 44 4 48 0 54 0 001 002 003 004 005 006 007 008 009 010 p dB 60 54 50 5 48 46 444 431 42 409 40 Return Loss Specified o or Return Loss of Load Figure 4 2 Probable Range of Measurable Directivity Values Model 85020A B Performance Tests 4 8 TEST PORT MATCH SWR Specifications 0401 to 1 3 GHz 1 3 to 2 4 GHz 2 4 to 3 0 GHz 3 0 to 4 3 GHz Description Using a tvpical reflection measurement setup another Directional Bridge is used to measure the test port SWR of the Directional Bridge under test The RF IN port of the Directional Bridge under test must be properly terminated SWEEP OUT IN SWEEP S Or RE M NETWORK OSCILLATOR soo S25 ANALYZER Not Connected I DEVICE UNDER TEST KL ML OPEN L 7 SHORT Figur
60. r Cable Replacement Preamplifier Assembly Replacement COVERED BARE WIRE TO SOLDER LUG ON BRIDGE Figure 8 5 Cable to Preamplifier Wiring Diagram To replace the power cable Wl or the preamplifier assembly A2 proceed as follows Ts 8 10 Remove the two screws holding the port cover test port end plate and remove the port cover Slide the top dress cover out of the Bridae frame Unsolder the wires connected to the power cable preamplifier assemblv To rewire the power cable refer to Figure 8 5 Cable to Preamplifier Wiring Diagram To reconnect the preamplifier A2 to the bridge microcircuit Al solder the white black wire to the pad at the top of the preamplifier the side furthest from the microcircuit Solder the white red wire to the middle pad on the preamplifier Model 85020A B Service Replacement of the Al Bridge Microcircuit Assembly The bridge microcircuit assembly Al illustrated in Figure 8 6 includes input port connector Jl and test port connector J2 and reference termination ATl This assembly may be replaced on an exchange basis at considerable cost savinas Refer to Section VI of this manual for the part numbers for new and exchange assemblies Since the instrument serial number label must be removed for access to the hridae assemblv each reolacement bridae assembly is supplied with a replacement blank serial number label The instrument serial number should be tvped on this label which i
61. ra Australia Capital Territory Office Hewiett Packard Auslraka itd 321 Wokongong Street FYSHWICK A C T 2508 Tek 80 4244 Telex 82650 Cable HEWPARD Canberra CHOMEP Metbourna Victoria Office Hewiett Packard Australia Ltd 31 41 Joseph Street BLACKBURN Victoria 3136 Tel 89 6351 Telex 34 024 Cable HEWPARD Melbourne ACH CM CS E MSP Parth Western Austraila Office Hewlett Packard Australia Lid 261 Stirling Highway CLAREMONT WA 5030 Tei 383 2188 Teter 93859 Cable HEWPARD Perth ACH CM E MS P Sydney New South Wales Otfice Hewlett Packard Australia Lid 17 23 Talavera Road PO Box 308 WORTH RYDE N S W 2113 Tei 887 16 11 Tee 21561 Cable HEWPARO Sydney A CH CM CS E MS P AUSTRIA Hewlett Packard Ges m b h Grottenhofstrasse 94 Varkaufsburo Graz A 8052 GRAZ Tet 291 5 56 Telex 32375 CH CM E Hewlett Packard Ges m bh bebigasse 1 PO Box 72 A 1222 VIENNA Tel 0222 23 65 11 0 Telex 134425 HEPA A ACH OM CS E MS P BELGIUM Hewietl Packard Belgium A NY Sed de la Woluwe 100 Woluwedal B 200 BRUSSELS Tel 02 7862 32 90 Telex 23 494 paloben bru ACH CM CS E MP P BRAZH Hewlett Packard do Brasil f e C Lida Aeren Bio Nego 756 ALPHAVILLE 06460 Barueri SP Tet 421 1311 Telex 011 33872 HPBR BA Cabie HEWPACK Sao Paulo A CH CM CS EMS Hewlett Packata do Brasil t e C iida Avenida Epitacia Pessoa 4664 2247 RIO DE JANEIRO RJ Tei 286 0237 Telex
62. rcially available packaging materials a Wrap the instrument in anti static plastic packaging material If shipping to a Hewlett Packard Office or Service Center attach a tag indicating the type of service required return address model number and full serial number b Use a strong shipping container c Use enough shock absorbing material around all sides of the instrument to provide a firm cushion and to prevent movement inside the container d Seal the shipping container securely e Mark the shipping container FRAGILE to ensure careful handling f In any correspondence refer to the instrument by model number and full serial number 2 3 2 4 Model 85020 A B Operation SECTION III OPERATION 3 1 INTRODUCTION 3 2 This section contains information for operation of the 85020A B Directional Bridges 3 3 OPERATING PRECAUTIONS CAUTION SUSCEPTIBLE TO DAMAGE FROM STATIC DISCHARGE The 85020A B Directional Bridges contain microcircuits that are highly sensitive to electrostatic discharge ESD Damage from ESD is most likely to occur as the bridges are connected or disconnected The surest method of protecting the 85020A B is for the operator to wear a grounding strap that provides a path to ground of no less than 1 Megohm and no more than 2 5 Megohns Alternatively the operator can ground himself before touching the bridge connectors by touching any grounded instrument chassis A work station equipp
63. ro M nchen Eschenstrasse 5 D 68028 TAUFKIRCHEN Tel 089 6117 t Telex 0524985 ACHOME MS GREAT BRITAIN Hewiell Packard Ltd Trafalgar House Navigation Road ALTRINCHAM Chesire WA14 INU Tel 061 928 8422 Telex 668068 ASHESEM Hewlei Packard iid Pinewood Nine Mite Ride EASTHAMPSTEAD Wokingham Berkshire 38611 Ri Tel 3445 3100 Telex 84 89 95 CHOSE Hewlett Packard Lid Founer House 257 283 High Street LONDON COUNEY Herts AEZ 1HA St Albans Tel 0727 24460 Telex 18952716 CHEESE Hewielt Packard Lid Tradax House St Mary s Walk MAIDENNEAD Berkshire SLG ST Tel 0629 39 15 CHISEP Hewlett Packard Ud Quadrangie 136 118 Station Road REDHILL Surrey Tel 10737 60655 Telex 947234 CH CS E Hewlell Packard Ltd King Sweet Lane WINKERSH Wokingham Berkshire RG1 BAR Tek 10734 784774 Telex 847 478 ACHE M GREECE Kostas Xaraynnis S A 8 Qmitoy Steet ATHENS 133 Tel 32 30 303 32 37 3774 Telex 21 59 62 RKAR GR ACH CMCS EMP GUATEMALA JPESA Avenida Reforma 3 48 Zona Y GUATEMALA Tel 316627 314786 Telex 4192 YELTRO GU A CHCM CS E MP HONG KONG Hewlett Packard Hong Kong Lid 28 0 Box 795 5th Fipor Sun Hung Kai Centre 30 Harbor Hoad HONG KONG Tel 5 83232 11 Telex 66678 HEWPA HX Copie HP ASIA LTD Hong Kong CHOSP INDIA Blue Star Lid Sabri Complex fi Floor 24 Residency Ad BANGALORE 560 025 Tel 55660 Telex 0845 430 Cable BLUESTAR ACHEMCSE
64. s then applied to the instrument following bridae assembly replacement CAUTION The 85020A B Directional Bridge microcircuit is highly sensitive to electrostatic discharge ESD For service purposes a work station equipped with an anti static surface must be used and a grounded wrist strap must be worn Never touch the center contacts of the connectors with the fingers CAUTION Do not attempt to disassemble or repair the bridge microcircuit assembly A1 including connectors Jl and J2 and reference termination ATI Do not remove or loosen any screws on this assembly Any attempt to perform any disassembly or repair not clearly outlined in this section will automaticallv void the warranty To remove the bridge microcircuit assembly Al proceed as follows l Type the serial number of the 85020A B Directional Bridge on the rear panel label sunplied with the new or replacement bridge assembly 2 Remove the two screws holding the port cover the test port end plate 3 Remove the port cover 4 Slide the top dress cover out of the grey 85020A B Bridge frame 8 11 Service Model 85020A B 5 Unsolder the two white black wires and the white red wire from the solder luq and connector pins on the Al bridge housing 6 Turn over the instrument Remove the printed mylar serial number label and the aluminum foil cover from the back of the extruded frame Four screvs will be exposed 7 Remove the four screws from the b
65. ter contacts of the connectors Tests at Hewlett Packard have revealed that repeated ESD charges as low as 250 volts can destroy microwave diodes Ordinarv activities around everyday materials can generate ESD voltages of tens of thousands of volts Materials conducive to static build up include floor carpeting nylon clothing droe air paver adhesive tape styrofoam and vinyl Use of the precautions described here will considerably reduce the probability of damage from ESD For service purposes a work station equipped with an anti static surface must be used Use only anti static solder removers and grounded soldering irons Some replacement parts may be shipped in static protective packaging remove the parts from this packaging only at an anti static work station while wearing the grounded wrist strap All anti static safeguards should conform to state and federal safety standards 1 1 Model 85020A B General Information WORT E EDEL ER uu ne M Figure 1 2 Models 85020A and 85020B Directional Bridges 1 2 Model 85020A B General Information SECTION I GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This manual contains operating and service information for the Hewlett Packard Models 85020A and 85020B Directional Bridges Section 1 includes specifications and supplemental performance characteristics safetv considerations instrument identification description and other basic information Fiqur
66. terminated On the 8756A press CURSOR The return loss of the unterminated minimum loss pad 5 7 AB in each direction will be displayed The display should read 11 4 dB 2 AB Figure 3 3 85020B Operator s Check 2 of 2 SA MEN ona Om D O ogoogo WEEP RF OSCILLATOR OOS 55 see SEN a PLUG IN 00 zi eno 00200 DEVICE UNDER TEST DETECTOR For 75 measurements using the 85020B refer to paragraph 3 16 Figure 3 4 Typical Measurement Setup Using 8756A Model 85020A B Operation NETWORK ANALYZER DISPLAY NORMALIZER INTERCONNECT CABLE SWEEP em OUTAN SWEEP Q O pasa O RE OSCILLATOR 3 868 8 MENA 5 I FEIS gt gt NAME s O 690 DEVICE UNDER TEST DETECTOR BRIDGE eco gem om t ts xa MT STORAGE NORMALIZER For 7502 measurements using the 850208 refer to paragraph 3 16 Figure 3 5 Typical Measurement Setup Using 8755C with 87504 SWEEP OUT IN 6098000 NATOR SS Se i NETWORK i OSCILLATOR PLUG IN SS E Bes NAR BETECTOR POWER rit SPLITTER I OPEN ke I SHORT BRIDGE DEVICE DETECTOR UNDER TEST For 75Q measurements using the 850208 refer to paragraph 3 16 Figure 3 6 Typical Measurement Setup Using Power Splitter 3 9 3 10 ee parres Model 85020A B Performance Tests SECTION IV PERFORMANCE TESTS 4 1 INTRODUCTION 4 2 The procedures in this section test
67. tre Rue Yan Gogh F 59650 VILLENEUVE D ASQ Tek 20 91 41 25 Telex 160324F CHOR E MS P GERMAN FEDERAL REPUBLIC Hewlett Packard GrabH technisches Biko Berlin Keithstrasse 2 4 D 1000 BERLIN 30 Tet 030 24 90 86 Telex 018 3405 hpbin d ACH CME MPX Hewlett Packard GmbH Tachnisches Biko B blingen Hetrenberger Strasse 116 0 7030 BOBLINGEN Tei 6703 4 667 1 Teiex bbn or ACH CM CS E MPP Hewlett Packard GmbH Technisches B ro Yussekior Emanuel Leutze Strasse D 4000 DUSSELDORF Tei 0211 597 1 1 Telex 085 86 533 hp d AQH CM CS E MSP Hewleu Packard GmbH Veririebszentrale Frankfurt Berner Strasse 317 Postiach 560 140 D 6000 FRANKFURT 56 Tel 0611 50 04 t Telex 04 13249 bpHm d A CH CM CS MP P Hewielt Packard GmbH Technisches B ro Hamburg Kapsiagtring D 2000 HAMBURG 62 Tet 060 63804 1 Telex 021 83 032 hphh d ACH OM CSEMSP Hewitt Packard GmbH Technisches Burg Hatnovar Am Grossmarkt D 3000 HANNOVER 91 Fat 0514 48 60 01 Telex 092 3259 ACH CME MSP Hewlett Packard GmbH Technisches Blro Mannheim Rosslauer Weg 2 4 D 56800 MANNHEIM Ter 1062 70050 Feier 0462 105 ACE Hewlett Packatd GmbH Techasches B ro Neu Ulm Messesschmilistasse 7 D 793D NEU BLM Tal G73170241 Telex Q7 128 18 HP KMD ACE Hewistl Packarg GmbH Technisches B ro Nyberg Neurneyerstrasse 90 100 8500 N RNBERG Tel 0941 52 20 83 87 Telex 0623 860 CH OM EMS Hewielt Packard GmbH Technisches B
68. twork Analyzer is a microprocessor based dual channel receiver with its own digital display It makes Scalar transmission and reflection measurements at RF and microwave frequencies over a dynamic range of 50 dBm to 10 dBm It can measure amplitude ratios up to 60 dB The 8756A is completely programmable through HP IR Hewlett Packard Interface Bus and can control a plotter HP 7470A or 9872C or a swept source HP 8350B or 8340A through the 8756 System Interface HP IB is Hewlett Packard s hardware software documentation and Support for IEEE 488 and IEC 625 worldwide standards for interfacing instruments The 85020A B Directional Bridges are designed to be used with the 8756A 1 22 The 85020A B Directional Bridges are also fully compatible with the Model 8755C Scalar Network Analyzer Althouah the 8755C is not programmable it also measures amplitude levels of 50 dBm to 10 dBm and amplitude ratios of 60 dB over a frequency range determined by the detectors used The 8755C plugs into a Model 180 series display mainframe such as the 182T or the 180TR In applications where memory or normalization is required the 8750A Storage Normalizer is used in conjunction with the 8755C In this case the displav mainframe used with the 8755C mav require modification for interface with the 8750A A table of 8750A Display Mainframe compatibility is provided in Section I of the 8755C Operating and Service Manual General Information Model 85020A B
69. ulentie SF 02100 ESPOO 10 Tei 90 455 82 11 Telex 121563 hewpa sf ACH CM CS E MS P FRANCE Hewlett Packard france 24 Mercure B Bue Bebe F 13763 Les Mites Cedex AIX EN PROVENCE Tei 42 59 41 02 Telex 4307 70F ACH OME MSP Hewlen Packard France Bureau de Vente de Lyon Chemin des Mauitles Bade Postale 182 F 69130 ECULLY C dex Tel 78 35 8 1 25 Telex 310617F ACH MCSE MP Hewlett Packard France immeuble France Evry Tow Lorraine Boulevard de France F 91035 EVRY C dex tek 60 77 96 60 Telex 692315F CHE Hewlett Packard France Centre d Affaire Paris Nord Batiment Ampere 5 tage Rue de la Commune de Paris Boite Postale 300 F 93153 LE BLANC HESAK Tel 01 8685 44 52 Telex 211032F CH CM CS E MS Hewiett Packard France Le Montesquieu Avenue du President JF Kennedy F 33700 MERIGNAC Tel 56 34 00 84 Telex 550105F CHCMENS Hewlett Packard france Zone Industiebe de Couraboeu Avenue des Trapiques F 9 1947 Les Ulis C dex On Tet 6 907 78 25 Telex 6000487 ACHCHM CS EMP P Hewlett Packard France 2 Adee de la Bougonene F 35 10 RENNES Tel 99 51 42 44 Telex 740812F CH OM E MS P Hewletl Packard France 4 Rue Thomas Mann Boite Postale 56 F 67200 STRASBOURG Tel 881 28 56 46 Telex 890 14 tF CH CM E MSF Hewlett Packard France 28 Chemin de la C ps re F 3108 f TOULOUSE C dex Tek 61 40 11 12 Telex 531639F A CH CM CS E nr Hewiett Packatd france Immeutie P ncen

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