HP R85026A User's Manual
Contents
1. To request information on a part not listed in the replaceable parts table include the instrument model number instrument serial number and a description and function of the part Address your inquiry to the nearest Hewlett Packard office Table 4 2 Abbreviations A Assembly m Male Metre AC Alternating Current MISC ADJ Adjust mm cm Centimetre ns dBm Decibels referenced to 1 mW pf DUT Device Under Test P N ESD Electrostatic Discharge static PP r Fahrenheit Female RF GHz Gigahertz SM in Inch Y k Kilo 1000 VDC kg Kilogram W HP R85026A Miscellaneous Millimetre Nanoseconds Picofarad Part Number Peak to Peak Radio Frequency Small Volt Voltage Volts Direct Current Cable Watt Service 4 5 4 6 Not Shown A TT TT aae Reference HP Part G er Designation Number Description 1 85026 60004 i 4 1 RESTORED HP R85026A 2 85026 80005 7 1 LABEL HP TRADEMARK Not Shown 3 85026 80004 6 1 LABEL 1D R85026A 4 85026 80006 8 2 LABEL WARNING MAX INPUT Not Shown 5 85025 40001 8 2 SOLID PLASTIC HALF BODY 6 85025 20007 2 INNER METAL SLEEVE 7 0515 0061 6 2 SCREW MACHINE M2 5x0 45 4MM LG Not Shown 8 2190 0583 9 2 LOCK WASHER 2 5MM Not Shown 9 85025 60003 2 1 CABLE W1 10 5061 1044 9 1 CABLE MARKER KIT 11 5040 0359 3 1 FLANGE COVER 12 8710 1539 7 1 3 32 INCH HEX BALLDRIVER 13 85026 80007 9 1 STORAGE BOX LABEL Not Shown 14 1540 0181 5 1 STORAGE BOX 15 85026 80010 4 1 TOP AND BOTTOM PACKAGING FOAM2. 1 4 y Per Initial Inspection A IV SERVICE Preparations for Use 1 5 INTOQUCIOA iii 4 1 Operating Environment 1 6 Cable Troubleshooting 4 1 Storage and Shipment 1 6 Power Cable Replacement 4 3 Adjustments o ooooo 1 7 Ordering Information 4 4 Ordering Manual Microfiche 1 7 Replaceable PartS 4 4 HP R85026A Table of Contents H p i H H H H H i H H H H H H H i H i H 5 H 5 H H H H i i i i H H H i H i H i 3 i H H i i i i i 5 5 N E i DACH DOES s SEA i pi 3 p EMPTIS Kruger fart IET IIT NIIS T 3 Vett rt es rr eee tie exe MA NE NT T ERRE TAN one Bad SELL ED Gag O a E em o Ne Sagara ue ye se VS NIU S AAN anai MAn NNI eee te MIS N Eee TEN eek ret ME B tr aent i UM M iii c illlw e re Ne rer et Sar Ti A Per PE OS o OE AA f S ERR RR at o ES e So wate ett A RR REA AN ae re oe i AN A AA See EWS AE A i Ver SUE See eS reete Nit etes SM T Pere A UI e e e i vine fe Slee nee nd SMe stand capes cosets Ml Nagas pg o pep Ns quee DN cess det a tat eth IS E A SS WEEE e Be Ie ae H Veit Lee eet te Een LR A A d Sat Sors eret quet ea atit mes e So B A kodet ME RA EA OA SR es RS AA i eee ee ER tt te ee E i er TED VEMM MISMA AR NN IPEA ANIM m ee e ette I H ele tV TI SRI AS NURSE t pi
3. Short 26 5 to 40 GHz HP R921A P WR 28 Low Pass Filter 26 5 to 40 GHz HP R362A P WR 28 Isolator 26 5 to 40 GHz HP R2365A O P Power Meter With frequency HP 436A P compatible sensor Power Sensor 26 5 to 40 GHz HP H8486A P Variable Attenuator 0 to 50 dB 05 accuracy HP R382A Opt 890 P i Digital Voltmeter Accuracy 0 01 HP 3456A S input Impedance z 10M ohms Phillips Screwdriver Size 0 Point HP P N 8710 0978 Flat Blade Screwdriver HP P N 8730 0008 Hex Nut Wrench 1 2 x 7H6 HP P N 8720 0009 O Operators Check P Performance Tests S Service The HP 83550A can be replaced by an HP 83590 Series plug in and an HP 8349B microwave amplifier 1 8 General information HP R85026A Section II O i INTRODUCTION This section contains information concerning the operation of the HP R85026A detector Cua Never look directly into the open end of a piece of waveguide when it Is connected to a source of microwave energy Microwave energy is extremely harmful to the eye FEATURES The HP R85026A features are shown in Figure 2 1 OPERATOR S CHECK The OPERATOR S CHECK at the end of this section verifies that the HP R85026A is functioning correctly It does not thoroughly check all specifications to their limits but it is an appropriate test for daily instrument verification incoming inspection or verification after digital circuit repair or replacement OPERATING PRECAUTIONS Do not apply more t
4. a uer n t Ia cece sos te o P Ino uere e A NR YU erre Patan S bab ER CABLE MARKER KIT HP Part Number 5061 1044 tA Figure 1 1 HP R85026A and Accessories Supplied 1 0 General Information HP R85026A General Information INTRODUCTION This manual contains information required to operate test and service the Hewlett Packard R85026A detector Figure 1 1 shows the instrument and the accessories supplied with it INSTRUMENTS COVERED BY THIS MANUAL Each HP R85026A detector has a unique serial number This manual applies to instruments with serial number 100 and above A detector manufactured after the printing of this manual may be different from the detector documented in this manual The manual for newer instruments is accompanied by a yellow manual change supplement that contains serial specific change information explaining how to adapt the manual for the newer instrument In addition to change information the supplement may contain replacement information that applies to all instruments regardless of their serial number To keep this manual as current as possible periodically request the latest manual change supplement The supplement for this manual is keyed to its print date and part number which appear on the title page Complimentary copies of the supplement are available from your local Hewlett Packard office DESCRIPTION The HP R85026A detector is designed to be used with the HP 8757
5. of 45 dBm 3 dB 15 Press AVG and AVG ON OFF to turn averaging off 16 Press SYSTEM and select MODE AC DC to turn DC on 17 Repeat steps 6 through 14 to check the detector in the DC detection mode if the HP R85026A does not pass the OPERATOR S CHECK refer to TROUBLESHOOTING in Section IV Service HP R85026A Operation 2 7 2 8 panser TN BME ASN NIA Nese ee ee WELLE vase AEN SEMAN DEDO NS EATER NE NE IEEE Ven dass III rn PE seven ne oven ov seene ov seee m evnnnnuseveeeseee evennnssv esnsesmen ee re INTRODUCTION The procedures in this section test the electrical characteristics of the HP R85026A detector against the specifications listed in Table 1 1 in Section I General Information These procedures do not require access to the interior of the detector There are three performance tests in this section 1 Return Loss 2 Flatness 3 Dynamic Accuracy Table 1 2 lists the recommended test equipment used in this section Any equipment that satisfies the critical specifications given in that table may be substituted for the recommended model Results of the performance tests should be tabulated in Table 3 1 Performance Test Record Card This record lists the tested specifications and their acceptable limits HP R85026A Performance Tests 3 1 RETURN LOSS Specification 26 5 to 40 GHz gt 12 dB At 20 to 30 C 36 to 118 F Description Two HP R85026A
6. the value in column 5 and record this new value in column 6 Error 18 Repeat steps 16 through 18 using the frequencies listed in column 1 of the Performance Test Record Card 19 After all of the frequencies have been tested subtract the minimum error value column 6 from the maximum error value and divide by two The result should be within the 1 5 dB specification 40 2 dB uncertainty 3 6 Performance Tests HP R85026A DYNAMIC ACCURACY Specification 26 5 to 40 GHz 0 3 dB 0 03 dB dB Referenced to 5 dBm At 20 to 30 C 36 to 118 F Description The performance test for dynamic accuracy is performed in both the AC and DC detection modes In each case the reference power is set to 5 dBm and attenuated in 5 dB steps The results can be plotted on the accompanying graph 8757 SYSTEM INTERFACE RF PLUG IN On Oo O n ees erus ago SERET SWEEP OSCILLATOR PAL mim O aan Ei nago mui CHO fa b naoa source MODULE INTERFACE HP 8757A SCALAR NETWORK ANALYZER SOURCE MODULE LL LOWPASS i VANE ISOLATOR FILTER ATTENUATOR HP R85026A DETECTOR POWER SENSOR Figure 3 3 Dynamic Accuracy Test Setup HP R85026A Performance Tests 3 7 Equipment SWE60 OSCO vare AA tia RA HP 83508 REPO me PC HP 83550A Source Module 15 n CELER EXP UR E d ee TRES UR HP 83554A NAWO ANAY Z iai berum blo ace daa qs aw R
7. utes 4 2 Service HP R85026A Table 4 1 Cable Connectors and Wires Conductor Label Signal 1 White W Output Green G Return Yellow Y Control Blue B 12 6v Red R 15v 2 Use the DVM to check for possible shorts between the connector pins and ground frame 3 If there are any discontinuities replace the cable by following the instructions in POWER CABLE REPLACEMENT POWER CABLE REPLACEMENT Equipment Phillips Screwdriver o HP 8710 0978 Fiat Blade Screwdriver 0 ccc cece cece eee HP 8730 0008 7 6 Inch Hex Nut Wrench 0 000000000 00000 LLL LLL HP 8720 0009 Procedure Electrostatic discharge ESD as low as 60 volts can destroy microwave diodes if static discharge is noticed by the operator it indicates a voltage of at least 20 000 volts Materials conducive to static build up include carpeting nylon dry air paper adhesive tape styrofoam vinyl The best method of preventing ESD is for the operator to wear a grounding strap HP Part Number 9300 0970 connected to a conductive bench mat HP Part Number 9300 0797 that provides a path to ground of between 1 and 2 5 Megohms Aiternatively the operator can ground himself by touching any grounding instrument chassis before touching the HP R85026A board assembly HP R85026A Service 4 3 4 4 1 Remove the outer and inner covers by performing the Cover Removal under the CABLE TROUBLESHOOTING section 2 Unsolder the wires connected to th
8. 508 sweep oscillator with an HP 83572A B RF plug in option 006 The HP 8340A or 8341A synthesized sweeper with an HP 8349B microwave amplifier and an HP 83554A mm wave source module Note The HP 8349B microwave amplifier requires a 0 5V GHz input from the source See SOURCE SYSTEM GUIDES in the HP 83554A Millimeter Wave Source Module R Band System Manual EQUIPMENT AVAILABLE The following equipment is available for use with the HP R85026A detector HP RFUSPCUID ey Stes Crete eee vies hae Directional Coupler 10 dB 20 dB PRAN pr PITT Frequency Meter HP R382 o o Rh ht rn Precision Variable Attenuator HP R85026A General Information 1 3 1 4 ACCESSORIES AVAILABLE The following accessories are available for the HP R85026A detector A A we LR en PH EE S 76 metre 25 foot extension cable il PE REA Gs E ed e eic On E E ACA 61 metre 200 foot extension cable HP 11548A R Band waveguide holder used with waveguide stand rit 11540 regio EE Waveguide stand Locks waveguide holder at any height from 70 to 133 mm 2 7 to 5 25 in AP TROON M Pn Waveguide Low Pass Filter o AA OEA Isolator Faraday rotation type asit sine Ud ad Fixed Load AP MOI sa Ga CR XE dori uera ius i ae to eee Standard Section HP BESIAIB cu irasci IR ata acta AS Waveguide 90 Bend E Plane H Plane HP ABIGA aua datei ed ER nd etae ed Waveguide 90 Twist R H L H HPRB99A B Waveguide Straight Section 2 5
9. 6A detector are shown in Figure 1 1 instrument Case To protect the HP R85026A when not using the detector store it in its case Hex Balldriver Use the 3 32 inch hex balldriver to tighten or loosen hex screws when making waveguide connections Flange Cover When the HP R85026A is not in use protect the waveguide with the flange cover Cable Markers When you use more than one detector in a test setup use the cable markers for identification General Information HP R85026A EQUIPMENT REQUIRED BUT NOT SUPPLIED To use the HP R85026A detector you will need a network analyzer and a source Network Analyzer With the HP 8757A scalar network analyzer you can make measurements using AC detection a 27 778 kHz amplitude modulated signal or DC detection an unmodulated signal The HP 8757A with up to four HP R85026A detectors Opt 001 measures amplitude levels of 50 to 10 dBm and amplitude ratios of up to 60 dB AC detection For more information see the HP 8757A Scalar Network Analyzer Operation Manual To ensure that the HP R85026A meets its dynamic accuracy specification the HP 8757A must have firmware revision 2 0 Source There are several source options The HP 8350B sweep oscillator with an HP 83550A RF plug in and an HP 83554A mm wave source module The HP 8350B sweep oscillator with an HP 83590 series RF plug in an HP 83498 microwave amplifier and an HP 83554A mm wave source module The HP 83
10. A scalar network analyzer it is NOT compatible with the HP 8755C or 8756A scalar network analyzer The HP R85026A enables the analyzer to measure either modulated AC or unmodulated DC test signais The HP R85026A detects 26 5 to 40 GHz RF signals at levels from 50 to 10 dBm AC detection The use of three HP R85026A detectors and two waveguide directional couplers enables simultaneous amplitude only transmission and reflection measurements via the analyzer CHT SPECIFICATIONS Table 1 1 lists the HP R85026A specifications HP R85026A General information 1 1 SAFETY CONSIDERATIONS General Become familiar with all safety instructions in this manual before you use the HP R85026A detector This product was designed and tested in accordance with international standards Safety Symbols WARNING This indicates a personal hazard WARNING calls attention to a procedure practice etc that if not performed correctly can cause personal injury Do not continue past a WARNING until you fully understand and meet the stated conditions CAUTION This indicates a mechanical hazard CAUTION calls attention to an operating procedure practice etc that if not correctly performed or adhered to can cause damage to or destruction of part or all of the instrument Do not continue past a CAUTION until you fully understand and meet the stated conditions ACCESSORIES SUPPLIED The accessories supplied with the HP R8502
11. HP R85026A DETECTOR 26 5 to 40 GHz d SERIAL NUMBERS This manual applies directly to HP R85026A detectors with serial number 100 and above For additional information about serial numbers refer to INSTRUMENTS COVERED BY MANUAL in Section I General Information Copyright HEWLETT PACKARD COMPANY 1986 1400 FOUNTAINGROVE PARKWAY SANTA ROSA CA 95401 U S A MANUAL PART NO 85026 90001 Microfiche Part Number 85026 90002 Printed FEBRUARY 1986 HEWLETT PACKARD AS AAA ett ree tee M ne eRe EET III Permet nemen em mener nenne P P PUDE SENE RUE NE PEREI ebat NINA plan repudio hh P Ph Ph PII Dee A DA TABLE OF CONTENTS Section Page Section Page GENERAL INFORMATION H OPERATION IntrogU CHOR us sso Ae V Ea RR 1 1 INTOCUCION choses 6 ose keene 2 1 instruments Covered by RE ENE 2 1 this Manual EE 1 1 Operator s Check 2 1 DESCNOUON coe cerei OR CE ed 1 1 Operating Precautions 2 1 Specifications lt 1 1 Operating Theory 2 2 Safety Considerations 1 2 Detection Modes 2 3 Accessories Supplied TO Renae eee 1 2 T PERFORMANCE TESTS Equipment Required but introduction 3 1 not Supplied 006 1 3 NtrOdUCHION ivo ais Equipment Available 1 3 Ed LOSS A eee hee 3 2 l ANNES Sey med aah ea ate ee a 3 5 Accessories Available 1 4 A Ane 3 8 Recommended Test Equipment
12. Service HP R85026A m Not Shown Table 4 3 Replaceable Parts Not Shown Not Shown 000000 Not Shown
13. a Oj Lid SOURCE MODULE INTERFACE mm WAVE SOURCE MODULE LOWPASS ISOLATOR FILTER Mi Se GE occo CIL oopa mo adan HP 8757A SCALAR NETWORK ANALYZER HP R85026A pp _ ad DETECTOR DEVICE UNDER TEST WAVEGUIDE DIRECTIONAL COUPLERS HP R85026A DETECTOR Figure 3 2 Flatness Performance Test Setup Equipment sweep Oscillator LADA HP 8350B RE PIG sce eet wt sn pn een ste adeo ken er odio Edo ic o Vocis cado HP 83550A Gource MOS ita NT osea a CC d OA a HP 83554A NGIWOIK ANAZO ui env ab i ade dod AE E ADORA Ite UR o TC HP 8757A POWOr WGI sostiene bea HP 436A POWEI SONS Lucus cues d eeu s ob ERI di dod ero d des op des HP R8486A Directional Coupler two required llle HP R752C Detector two required plus DUT 4 vzekarsGxawb4w exa ATEN HP R85026A Low Pass Filter o oo NETTEN HP 362A A eee a NS A aa hee we oe pe HP R365A Performance Tests HP R85026A Procedure 1 Connect equipment as shown in Figure 3 2 with the power sensor connected to the coupler and allow the equipment to warm up for 30 minutes On the HP 8757A 2 Press PRESET to preset both the HP 8757A and the HP 8350B 3 Select CHAN 2 OFF 4 Press SYSTEM and select the MODE AC DC softkey DC lights up On the HP 8350B 83550A 5 Selecta CW frequency between 26 5 and 40 GHz We recommend that you select a frequency at which your power sensor is
14. calibrated See the CAL FACTOR chart on your power sensor Record this frequency in column 1 of the Performance Test Record Card Actual Test Frequency On the power meter 6 Setthe CAL FACTOR dial to the value for the selected frequency see the CAL FACTOR chart on your power sensor and zero the power meter 7 Heconnectthe power sensor to the coupler Read the displayed power and record this value in column 2 Power Meter of the Performance Test Record Card On the HP 8757A 8 Press MEAS and select the R softkey 9 Press CURSOR 10 Read the displayed power level on the network analyzer and record this value in column 3 R Detector of the Performance Test Record Card 11 Subtract column 2 from column 3 and record this new value in column 4 R Detector Power Meter 12 Repeat steps 7 through 12 using several CW frequencies between 26 5 and 40 GHz Again we recommend that you select frequencies at which your power sensor is calibrated 13 Disconnect the power sensor from the coupler Connect the HP R85026A detector as shown in Figure 3 2 On the HP 8350B 14 Set the output to the first CW frequency listed in column 1 of the Performance Test Record Card On the HP 8757A 15 Press MEAS and select the B R softkey HP R85026A Performance Tests 3 5 16 Read the displayed value on the network analyzer and record it in column 5 B R of the Performance Test Record Card 17 Add the value in column 4 to
15. ccuracy and the ability to characterize oscillators and modulation sensitive devices To use DC detection you must first set the DC measurement mode on the HP 8757A There is also a zeroing operation used in the DC mode that compensates for the effects of DC drift and temperature fluctuations The ability to make DC measurements and the softkeys specific to DC mode are not automatically accessible The HP 8757A must acknowledge the presence of an AC DC detector either at preset or via the CONFIG SYSTEM softkey in the CAL menu 1 Connect the equipment as shown in Figure 2 2 On the HP 8757A 2 Press PRESET During preset The analyzer reads each input port and identifies the detector or bridge connected to it AC DC or AC only e The HP 8757A enables the DC mode softkeys when an AC DC detector or bridge is identified Now you can access DC DET ZERO in the CAL menu and MODE AC DC in the SYSTEM menu 3 To turn on the DC mode press SYSTEM and select the softkey MODE AC DC AC dims and DC lights up When you select DC mode with the softkey MODE AC DC the analyzer turns OFF the source internal squarewave modulation HP 8350B and disables the analyzer s rear panel modulation drive output used with the HP 8340A 41A You can also have the analyzer read the inputs without using PRESET Press CAL and select the softkey ICONFIG SYSTEM if you remove and or exchange a detector you must reconfigure the syste
16. cm 1 in 5 0 cm 2 in AER DL as pro PO EN es Sliding Load AA E ee Moving Short AP RA aio aa ra rbd que estrema Oe dd aca Flat Short REGOMMENDED TEST EQUIPMENT The equipment required for testing and or troubleshooting the HP R85026A is listed in Table 1 2 Other equipment may be substituted if it meets or exceeds the critical specifications indicated in the table INITIAL INSPECTION If the shipping container or cushioning material is damaged keep it until the contents of the shipment are checked for completeness and the instrument is checked both mechanically and electrically 1 Checkthe package for completeness Figure 1 1 showsthe items you should receive with each detector 2 Check connector cable and body for mechanical damage 3 Test the detector electrically Refer to OPERATOR S CHECK in Section Il Notify your nearest Hewlett Packard office if any of the following conditions exist amp Theinstrument does not pass the performance tests and using the procedures in Section IV Service you cannot correct the problem The shipping contents are incomplete There is mechanical damage or defect Also notify the carrier if the shipping container is damaged or if the cushioning material shows signs of stress Keep all shipping materials for the carrier s inspection Hewlett Packard will arrange for repair or replacement without waiting for a claim settlement General information HP R85026A PREPARATIONS FOR USE Pow
17. detectors and two waveguide directional couplers comprise a reflectometer test setup for a return loss measurement The test setup is calibrated using a short to minimize frequency response errors The measured return loss should be greater than or equal to the specified value listed above There is an uncertainty range of 0 6 dB due to coupler directivity and mismatch uncertainty 9757 SYSTEM INTERFACE cao a nau EOR T OSCILLATOR pu non dt a l Go anges EE pcnc d EE de Y MODULE INTERFACE dar eee HP 8757A SCALAR NETWORK ANALYZER HP R85026A DETECTOR L RP IN LOWPASS ISOLATOR FILTER DEVICE UNDER TEST WAVEGUIDE DIRECTIONAL COUPLERS HP R85026A DETECTOR Figure 3 1 Return Loss Performance Test Setup 3 2 Performance Tests HP H85026A Equipment Sweep Oscillator cux pa RUE AR AA RAS HP 8350B REPITAN ee a ee ebrietate ied T ea HP 83550A SOUTO Mod l ores EEG Tor DPI HP 83554A Directional Coupler two required PEE eee RE iran HP R752C Detector two required plus DUT o o o ooooooooo ooo RS HP R85026A Scalar Network ANA Zl ik vuacack acd eal oe R P a ra E RC HP 8757A SIDE s enu A es x didt ed d etd ES HP R921A LOW SSS PIE as de hee x eoe Chalon aires a eda ata cic ERE HP R362A lH ADEST EIER ETT TN HP R365A Procedure 1 Connect equipment as shown in Figure 3 1 with the short connected to the coupler and allow the equipm
18. e power cable circuit board assembly Note that the pads to which the wires are soldered are labeled as indicated in Table 4 1 3 Remove the 1 2 inch hex nut that fastens the cable to the end plate 4 Remove the old cable 5 Install the new cable by performing this procedure in reverse order ORDERING INFORMATION Refer to Table 4 3 for the list of HP R85026A replaceable parts If your HP R85026A fails other than W1 a restored detector is available from your nearest Hewlett Packard sales or service office on an exchange basis thus affording a considerable cost savings Exchange factory repaired and tested detectors are available ONLY on a trade in basis The defective HP R85026A MUST be returned for credit REPLACEABLE PARTS introduction This section contains replaceable parts ordering information Table 4 2 lists abbreviations used in the parts list and throughout this manual Table 4 3 lists all replaceable parts The following information is given for each replaceable part The Hewlett Packard part number e The part number check digit CD e The total quantity Qty in the instrument e A description of the part Service HP R85026A Ordering Instructions To order a part in Table 4 3 provide the Hewlett Packard part number with check digit indicate the quantity required and address your order to the nearest Hewlett Packard office The check digit ensures accurate and timely processing of your order
19. energy is extremely harmful to the eye CABLE TROUBLESHOOTING Equipment Biete cui a dk 230 HP 3456A Cover Removal Procedure 1 Place the detector so that its narrow side is on a flat surface with the waveguide connector facing away from you Refer to Figure 4 1 While removing the covers DO NOT hold the detector in the palm of your hand Personal injury can result READ the entire procedure before attempting cover removal 2 Hold the sides of the detector near the cable end 3 Atan angle carefully insert the tip of a flat head screwdriver into the seam of the cover assembly until it slips under the seam Be sure your hand is not in the path of the screwdriver 4 Turn the screwdriver to snap apart the cover assembly HP R850260A Service 4 1 5 Turn the detector over and repeat steps 3 and 4 6 The cover assembly can be pulled apart to expose the metal housing 7 Toremove the inner metal sleeve remove the two screws located on the base plate next to the cable Slide the sleeve away from the housing and over the cable to expose the circuit board Figure 4 1 Cover Removal Cable Continuity Check 1 Use a digital voltmeter DVM to check the continuity of the power cable conductors from the connector pins to the wire connections inside the detector adapter housing Table 4 1 lists the cable connector pins and the corresponding wires 1 i P i lebe salse Pre te te te Pre Pte a
20. ent to warm up for 30 minutes On the HP 8757A 2 Press PRESET to preset both the HP 8757A and HP 83508 On the HP 8350B 3 Press START 21 6 5 GHz STOP 4 0 GHz This step sets the frequency range at the output of the HP 83554A source module On the HP 8757A 4 Select CHAN 2 OFF 5 Press MEAS and select A R softkey 6 Press DISPLAY and select MEAS MEN to store the channel 1 display in memory 7 Select IMEAS MEM A flat trace is displayed on the CRT 8 Connect the detector to be tested in place of the short in the test setup On the HP 8757A 9 Press SCALE and select AUTOSCALE in the SCALE menu 10 Press CURSOR and select the MAX softkey 11 Read the worst case return loss from the cursor value given in the active entry area of the CHT Hecord this value on the test record card HP B85026A Performance Tests 3 3 3 4 FLATNESS Specification 26 5 to 40 GHz 1 5 dB At 20 to 30 C 36 to 118 F Description This procedure measures the flatness of the HP R85026A detector at various CW frequencies within the detector s frequency range The Performance Test Record Card Table 3 1 facilitates this measurement The measured flatness should be within the specified values listed above There is a 0 2 dB uncertainty range in the flatness measurement 8757 SYSTEM INTERFACE R lOs O O 29091 peda an 9 pgg g 220 ana Cito d E 0 deno 000 ana
21. er Requirements Power for each detector is supplied by the HP 8757A scalar network analyzer Each detector requires approximately 0 5 watt Connecting the HP R850264 Detector Connect the detector to the analyzer as follows 1 Insert the HP R85026A multi pin connector into the analyzer mating connector The detector connector is keyed insert the plug with the key downward Secure the multi pin connector in the analyzer by turning the outer shell clockwise 3 Connect the HP R85026A to the RF output as follows Do not apply more than 16 dBm RF power to the HP R85026A Using the 3 32 inch hex balldriver supplied connect the HP R85026A to the RF output with four 4 40 socket cap screws The HP part numbers for the two screw sizes most often used are 3030 0209 0 5 in and 3030 0349 0 312 in Use a 4 40 double chamfer hex nut where required HP part number 2260 0001 Mating Connector The HP R85026A input connector is EIA size WR 28 waveguide This waveguide should mate directly with a UG 599 U cover flange and can be mated to a UG 318 U cover flange with the use of an HP 11516A waveguide adapter Detector Lead Identification Use the furnished coded cable clips cable marker kit to identify detector cables when you use two or more detectors Place matching clips on both ends of the same cable HP R85026A General Information 1 5 1 6 OPERATING ENVIRONMENT HP R85026A detector operates within the following environmental limi
22. etwork analyzer Operation HP R85026A MEASUREMENT SYSTEM CONFIGURATION 757 SYSTEM INTERFACE UODUDU HP 83508 SWEEP oss H HP 8757A SCALAR Me NETWORK ANALYZER HP R85026A pr M HP 83554A mm WAVE Jl MODULE SOURCE MODULE INTERFACE SER ei HP WAVEGUIDE R85026A DIRECTIONAL 1 i SOL ATOR HP R85026A Fi DETECTOR I Figure 2 2 HP R85026A 8757A Typical Measurement Configuration DETECTION MODES AC Detection Mode You do not have to set AC detection on the analyzer unless DC mode was used in the previous measurement even if the HP 8757A is turned off it remembers the measurement mode If the last measurement was in DC mode press SYSTEM and select MODE AC DC to turn AC mode on AC lights up You can also press PRESET to set the AC detection mode AC detection is automatically set when the analyzer presets For the majority of measurements AC detection is the preferred method It offers greater sensitivity and immunity to noise and drift with time and temperature AC detection amplitude measurements require a modulated test signal Modulation is provided via an internally modulated source e g the HP 8350B or from the HP 8757A rear panel modulator drive Test set connections depend on the source Figure 2 2 illustrates a typical measurement HP R85626A Operation 2 3 DG Detection Mode DC detection offers greater power measurement a
23. g terit MLNS 9 teeth NI SNA AR M NI eR I NEM Ir e ES weena e tL HUI A EE I NHIEU e eget INT SAPE ES ETE n sei T ee T Mete S MT ea AIN rev ditt ed ee i SU 3 quee e og Bag Be gone MUTET AUN OE ISIN ETG FO o Porr og seet ve peog essees STT s so Vogos CS ETA Re ST i MUN ted OMe reat ANI e Se Ss INRE ae Y a o ma Tett i tete vul DEA ee E iere NIAE Y b HEADS LM i MSS Riiser H A d e BID MIA i A gt T A pe A a e ED are RE RT EAT i Tae adn Sain awe de TS A een od MA H Ie XD Pei Ue Ue rie VN ETT ANN i A i teni D RI VEE TYNE i MONT eet nt eve E diga A dad A i A S SQUE NEL eee COD et BLU E MELMWMeADNPNNMENNWSPUMPA QNI Nis TATE DINI NN g rete a NETT Dei i E EE ERRATA i a eetos os Tooo eoep eeu eee aa e a 3 ee Er re NT tenets AN ee LETTS eue e ee ee ete S SE T Ea 1 SEs MM Aen Ree werte we So Pre ee NU Ie A Ie Ir NIIS Net S A bee NO Nr aes i ARE ad S PA RA RNA RA IAE CLE Wn 1 IPM ee E LESS I eU e tenet ee IIT I See NAT TA A LN NH ded ea N i AO eee Eie M E Esa ee peer SN RR ATI re NEAS st tI EI E E eg A SRS SAREE SET Se MM i EDT tr II eene ce NS deg IN DAE YN S Menem adeb e AN qr Y bean tee at rre de de i SUTTONS d s mas SRR 8 AT Diei e ad Pe wee Ade y rua eet e s Pre XL SS VEE va toe TS ggg SER eee eli PL ss OE CASE Poe Dr 23 ARM PARLE i INA PORC TEE Mone E oo nave Soan og Aeae Ues d Nt NT IUSTI esee dex rr gr AN nt ATI i Mee xU e LS rA EE an ee SII s A Ne Ls MRE TIME A MEANS AN tee i AA EN IS ee eg S S o X A AE AA A
24. han 16 dBm HF CW power to the HP R850264 or damage can occur Do not drop the HP R85026A or subject it to mechanical shock The detector is easily damaged HP R85026A Operation 2 1 2 2 i RF INPUT CONNECTOR WR 28 waveguide accepts the RF signal 2 MULTI PIN CONNECTOR supplies the necessary DC voltage from the analyzer for the operation of the HP R85026A and feeds the detector output signal to the network analyzer Figure 2 1 HP R85026A Features OPERATING THEORY The HP R85026A detects and adapts an input signal in the frequency range of 26 5 to 40 GHz that is either an unmodulated RF signal DC detection mode or a squarewave amplitude modulated RF signal AC detection mode so that it can be displayed on the HP 8757A scalar network analyzer In either AC or DC detection mode the detector provides a 27 778 kHz squarewave signal for the analyzer to interpret and display In AC detection an RF or microwave signal is amplitude modulated with a 27 778 kHz squarewave The HP R85026A demodulates envelope detects the signal to produce a 27 778 kHz squarewave whose peak to peak voltage corresponds to the RF signal magnitude at the detector input This signal is amplified and passed to the analyzer In the DC detection mode no modulation is required The HP R85026A detector converts the RF signal to a proportional DC voltage that is then chopped at a 27 778 kHz rate This chopped signal is amplified and passed to the n
25. le page of this manual is a manual part number and a microfiche part number Both can be used to order extra copies of this manual Microfiche are 10 x 15cm 4 x 6in microfilm transparencies Each microfiche contains reduced photo copies of the manual pages Also included in the microfiche package are the latest manual changes supplement and pertinent service notes The manual number also appears on the back cover in the lower left hand corner Table 1 1 Specifications 20 to 30 C Frequency Range 26 5 to 40 GHz Flatness 15 dB Return Loss gt 12 dB lt 1 67 SWR Dynamic Accuracy 0 3 dB 03 dB dB Referenced to 5 dBm Typically lt 0 5 dB from 10 to 40 dBm EE Dynamic Range AC 10 to 50 dBm DC 10 to 45 dBm Maximum Input Power 16 dBm Dimensions Cable length is 1 22 m 48 in Weight Net 0 24 kg 0 5 Ib Shipping 1 0 kg 2 2 Ib input Connector EIA size WH 28 waveguide Cover Flange UG 599 U With HP 8757A firmware revision 2 0 or higher HP R85026A General Information 1 7 Table 1 2 Recommended Test Equipment Critical Specifications Recommended Model KM Network Analyzer R85026A AC DC compatible HP 8757A with firmware rev 2 0 or higher mm Wave Source System 26 5 to 40 GHz OP Sweep Oscillator 8757A compatible HP 8350B RF Plug In HP 83550A Source Module WR 28 HP 835544 Directional Coupler 26 5 to 40 GHz HP R752C P WR 28 Detector 26 5 to 40 GHz HP R85026A P
26. m using either PRESET or the softkey CONFIG SYSTEM so that the correction factors match the port and device DG Zeroing When you make a DC mode measurement you should perform a zeroing operation to compensate for the effects of DC drift and temperature fluctuations this is not required for AC detection The zeroing operation eliminates small DC voltages from the diode detector that would otherwise cause amplitude measurement errors at low 40 dBm and below power levels On the HP 8757A 1 Press CAL and select MORE DC DET ZERO The analyzer displays SELECT DC DET ZERO 2 Select AUTOZRO The analyzer displays AUTOZERO IN PROGRESS and then AUTOZERO COMPLETED 2 4 Operation HP R85026A Repeat Autozero REPT AZ ON OFF repeats autozero at a selected interval REPT AZ TIMER Repeat Autozero Timer REPT AZ TIMER allows you to set the time interval for the Repeat Autozero from 1 to 60 minutes Manual Zero MANUAL is similar to zeroing a power meter First remove the RF signal from the detector Then select MANUAL to perform the zeroing NOTES if a device under test generates RF signals or noise Autozero is not valid Devices that can generate RF energy are microwave amplifiers and mixers with the local oscillator signal applied If you are testing such devices use Manual Zero For optimum performance the source RF output waveguide must be electrically connected to the detector input waveguide when zer
27. o wa dr HP 8757A Power MOLE drin dou a RC eU dct qe Ard e ERE ORE RO ELSE Va HP 436A POWOI SONSOl cuiua taro d s oL ON b esed a a e So ted e ORC e e ee eb tace HP R8486A E MERECE NORTE RN A a ROTER E NA HP R365A LoW Pass Filer ova vox Ria Dur doi redeo dob do eod TE VES HP H362A APA Ol ek he fe Seine eS et gt Ah A he nk BE BA E Ee HP R382A Procedure 1 Connect the equipment as shown in Figure 3 3 with the power meter connected to the HP R382A attenuator Allow the equipment to warm up for 30 minutes On the HP 8757A 2 Press PRESET to preset both the HP 8757A and HP 83508 Select CHAN 2 OFF 3 Press SPCL and select SMOOTH ON OFF ON lights up On the HP 8350B HP 83550A 4 Press CW 3 0 GHz 5 Press PWR LVL 5 dBm 6 Withthe attenuator set to 0 dB manually adjust the rotary knob on the RF plug in until a 2 dBm power level is displayed on the HP 436A power meter 5 dBm unmodulated 7 Connect the HP R85026A detector to the attenuator On the HP 8757A 8 Press CURSOR DISPLAY MEAS gt MEM MEAS MEM The cursor should read 0 dB 9 Onthe attenuator increase the attenuation by 5 dB and read the power displayed on the HP 8757A CRT 10 Add the attenuator value to the power displayed on the CRT Plot the result on the graph in the performance test record card For example if the attenuator is set to 20 dB and the power indicated on the CRT is 19 8 dB then plot 0 2 dB on the graph 11 Repea
28. oing It is good practice to perform a DC zero operation every five minutes and before making a low level measurement This is especially important if the operating environment temperature changes significantly several degrees centigrade Refer to the HP 8757A Operating Manual for detailed softkey information HP R85026A Operation 2 5 2 6 OPERATOR S CHECK DESCRIPTION The operator s check verifies that the HP R85026A is functioning properly It does not thoroughly check all specifications to their limits but is an appropriate test for daily instrument verification incoming inspection or verification after repair or replacement of digital circuits It consists of checking the detector over a 50 dB range SWEEP NE o BREA OSCILLATOR 257 ae i HP 8757A SCALAR NETWORK ANALYZER SOURCE mm WAVE VANE l MODULE Af SOURCE MODULE ATTENUATOR HP R85026A INTERFACE A TT a AAA _ DETECTOR ans TIT QA NS Figure 2 3 Equipment Setup for Operators Check EQUIPMENT Sweep Oscillator Mainframe eee HP 8350B REPO eii Forte tea o deoa dee eat Lt se dr OR S Rice ed HP 83550A mm Wave Source Module 0 ooo oo eones rar HP 83554A Variable AHLORUASIOT crac a ii er HP R382A Es A O O RO HP R365A Scalar Network Analyzer s isis tack ee CORRER SUR de ORAS a a ey HP 8757A Operation HP R85026A PROCEDURE 1 Connect the equipment as shown in Fig
29. t steps 9 and 10 until the attenuation is greater than 50 dB For testing in the DC detection mode press SYSTEM and select the MODE AC DC softkey DC lights up Press CAL and select DC DET ZERO and AUTOZRO Reset the attenuator to O dB and repeat steps 8 through 11 3 8 Performance Tests HP R85026A Performance Test Record Card 1 of 2 HP H85026A Detector Tested By Serial No NEU IE NEUEN Satte Date UM RR REN Temperature Optional RETURN LOSS 26 5 to 40 GHz 12 dB oen HB FLATNESS Test Frequency 2 3 A 6 Power R iris d Es Error Column 5 26 5 GHz 28 GHz 30 GHz 32 GHz 34 GHz 36 GHz 38 GHz 40 GHz HP R85026A Performance Tests 3 9 Performance Test Record Card 2 of 2 dB Max Error RT T rr ques TT RU T E Change in pouer dB Referenced at 3 dBm 3 10 Performance Tests HP R85026A INTRODUCTION The HP R85026A detector is not field repairable to the component level The only replaceable part is the cable assembly W1 with all other repairs involving a detector exchange This section provides cable troubleshooting and replacement procedures and the information for ordering a restored detector Any servicing or repair of this product must be performed by qualified personnel Never look directly into the open end of a piece of waveguide when it is connected to a source of microwave energy Microwave
30. ts Temperature 20 to 30 C 36 to 118 F Humidity Up to 95 Altitude Up to 7 620 m 25 000 ft Provide maximum protection from temperature extremes Condensation can occur within the instrument if it is exposed to temperature extremes or to higher humidity levels STORAGE AND SHIPMENT The instrument may be stored or shipped in environments within the following limits Temperature 40 to 75 C 13 to 167 F Humidity Up to 95 Altitude Up to 7 620 m 25 000 ft Provide protection from temperature extremes which can cause condensation within the instrument Packaging Containers and materials identical to those used in factory packaging are available through your local Hewlett Packard office Returning Instrument for Service If you ship the instrument to a Hewlett Packard office or service center please include the following information Your company name and address A technical contact person within your company and their complete phone number The complete model and serial number of the instrument The type of service required mo oJ S N gt Any other information that may expedite service When making inquiries either by correspondence or by telephone please refer to the instrument by model number and full serial number General Information HP R85026A ADJUSTMENTS There are no operator adjustable components on the HP R85026A detector ORDERING MANUAL MICROFICHE On the tit
31. ure 2 3 Allow 30 minutes for warm up On the HP 8757A 2 Press PRESET to preset both the analyzer and the source On the HP 8350B 3 Press START 2 6 5 GHz 4 Press STOP 4 0 GHz On the HP 8757A 5 Select the softkey CHAN 2 OFF to turn off the channel 2 trace NOTE The first time through the procedure you are checking the detector in the AC detection mode AC is analyzer default condition 6 Press CAL and select MORE DET OFFST The analyzer displays SELECT DETECTOR OFFSET 7 Select DET A The analyzer displays A DETECTOR OFFST and the value of the offset 8 Press 0 ENT to ensure that the detector offset is zero NOTE When using DC mode perform DC zeroing a Select PRIOR MENU b Select DC DET ZERO c Select AUTOZERO On the HP R382A attenuator 9 Setthe attenuation to O dB On the HP 8757A 10 Press CURSOR A cursor appears at the center of the trace Note the CRSR value displayed in the CRT s active entry area On the source 11 Adjust the output power level until the cursor value on the CRT reads 5 dBm On the HP R382A attenuator 12 Set the attenuator to 50 dB of attenuation On the HP 8757A 13 Press AVG and select AVG ON OFF to turn averaging on ON lights up The default average factor of 8 is displayed on the CRT Wait approximately seven seconds for the trace to seitle 14 Press CURSOR The active entry area should display a cursor value
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