Agilent V8486A Power Sensor
Contents
1. Cal Factor dB Cal Factor dB Cal Factor dB 70 1 549 85 0 706 115 0 607 71 1 487 101 0 043 116 0 645 712 1 427 102 0 086 117 0 682 73 1 367 103 0 128 118 0 719 74 1 308 104 0 170 119 0 755 75 1 249 105 0 212 120 0 792 76 1 192 106 0 253 121 0 828 771 1 134 107 0 294 122 0 864 78 1 079 108 0 334 123 0 899 79 1 024 109 0 374 124 0 934 80 0 969 110 0 414 125 0 969 81 0 915 111 0 453 126 1 004 82 0 862 112 0 492 127 1 038 83 0 809 113 0 531 128 1 072 84 0 757 114 0 569 129 1 106 130 1 139 V8486A User s Guide 11 2 General Operation TEMPERATURE C 10 10 20 30 40 50 60 m Es Sui Eo aa 0 5 Ao 1 0 Figure 2 2 Typical Influence of Temperature on Sensitivity The sensitivity of the power sensor is influenced by ambient temperature The sensor should be calibrated at the temperature of operation to obtain the most accurate results Typical temperature sensitivity variations are shown in Figure 2 2 Operating Instructions To operate the power sensor refer to the operating instructions in of the power meter operating and service manual If having an open RF connection on your system is a concern terminate the sensor Type N calibration port with a 50Q load Modulation Effects When measuring microwave sources that are modulated at the chopper frequency2. Connection to a V band waveguide component with a dirty or damaged flange for example loose particulates raised metal burrs or bent alignment pins can damage the precision interface of the power sensor Always inspect and clean the mating part prior to connection 2 broches 4trous taraud s d alignement 4 40 UNC 2B 2X 91 588 i 1 905 ee 2x 1 660 2 trous d alignement Cercle de boulonnage 14 288 Unit s en mm 3 810 Figure 2 1 Precision V band Interface on Front of Power Sensor Use the protective packaging provided with the sensor to protect the waveguide connector from dirt and mechanical damage whenever it is not in use Any burn dents or dirt on the flange or waveguide surface will increase the SWR and change the Cal Factor 2 10 General Operation The Type N connector plastic bead deteriorates when contacted by any chlorinated or aromatic hydrocarbons such as acetone trichlorethylene carbon tetrachloride benzene etc Clean the connector face with a cotton swab saturated in isopropyl alcohol Power Meter Calibrations The procedure for calibration may be different for each compatible power meter Follow the calibration directions given in your power meter manual Power Measurements To correct for varying responses at different frequencies a cal factor chart is included on the power sensors To use the cal factor at the frequency of
3. Technology Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accor dance with the terms of such license Restricted Rights Legend U S Government Restricted Rights Soft ware and technical data rights granted to the federal government include only those rights customarily provided to end user cus tomers Agilent provides this customary commercial license in Software and techni cal data pursuant to FAR 12 211 Technical Data and 12 212 Computer Software and for the Department of Defense DFARS 252 227 7015 Technical Data Commercial Items and DFARS 227 7202 3 Rights in Commercial Computer Software or Com puter Software Documentation Safety Notices CAUTION A CAUTION notice denotes a haz ard It calls attention to an operat ing procedure practice or the like that if not correctly performed or adhered to could result in damage to the product or loss of important data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met A WARNING notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly per formed or adhered to could result in personal injury or death Do not proceed beyond a WARNING notice until the indicated condi tions are fully understood and met V8486A User s Guide Certification Warranty Limita
4. interest adjust the power meter s CAL FACTOR control according to the instructions in the power meter s operating and service manual This will automatically correct the power readings If you are using a Agilent 435B or Agilent 436A the minimum cal factor setting is 85 and the maximum is 100 If the cal factor setting for your frequency of interest is below the meter s minimum or above the meter s maximum set the cal factor control to 100 and divide the reading in watts units by the decimal equivalent of the cal factor For example if the cal factor is 75 divide the reading by 0 75 This will result in a larger value of power than that displayed by the meter If the cal factor is 104 divide the reading by 1 04 This will result in a smaller value of power than that displayed by the meter If reading in dBm use the chart in Table 2 1 to convert the cal factor to dB and add this value to the reading Interpolate for values between those shown As above the cal factor control should be set to 100 If the cal factor is 75 add 1 25 dB to the displayed value On the other hand if the cal factor is 104 subtract 0 17 dB from the displayed reading V8486A User s Guide General Operation 2 The above procedure has eliminated some mathematical steps the following formula may be of some use Correct dBm Reading dBm 10 x Log Cal Factor decimal Table 2 1 Cal Factor
5. damaged If the power sensor shows evidence of attempted customer repair the warranty may be voided 21 4 Service THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK 22 V8486A User s Guide www agilent com Contact us To obtain service warranty or technical support assistance contact us at the following phone numbers United States tel 800 829 4444 fax 800 829 4433 Canada tel 877 894 4414 fax 800 746 4866 China tel 800 810 0189 fax 800 820 2816 Europe tel 31 20 547 2111 Japan tel 81 426 56 7832 fax 81 426 56 7840 Korea tel 080 7690800 fax 080 769 0900 Latin America tel 305 269 7500 Taiwan tel 0800 047 866 fax 0800 286 331 Other Asia Pacific Countries tel 65 6375 8100 fax 65 6755 0042 Or visit Agilent World Wide Web at www agilent com find assist Product specifications and descriptions in this document are subject to change without notice Always refer to the Agilent Web site for the latest revision Agilent Technologies Inc 2008 2013 Printed in Malaysia Fourth Edition April 5 2013 08486 90131 Agilent Technologies
6. nominally 220 Hz for the Agilent 43X family and 217 Hz for the Agilent E4418A B and Agilent E4419A B or at the first or second harmonic or submultiples of the chopper frequency beat notes will occur Unless the modulation rate is exactly the chopper frequency they can 12 V8486A User s Guide General Operation 2 usually be eliminated by averaging since the amplitudes are centered on the actual power These frequencies may also be avoided by changing the modulation frequency slightly if possible If you are using an Agilent 437B Agilent E4418A B or Agilent E4419A B Power Meter a filter setting of 128 will minimize most beat note interference To minimize beat note interference using a Agilent 438A Power Meter select a filter number of at least 7 Linearity Correction For most Agilent 8480 series power sensors the correct A type or D type linearity correction table is automatically selected However when you use the Agilent V8486A power sensor with Agilent EPM power meters you must override the automatic selection and select the D type correction This procedure provides optimum accuracy when making power measurements gt 10dBm Subsequent connection of another A type sensor will result in a warning message stating the Linearity Override May be Required To select the linearity type to be applied Agilent E4418B Press System Inputs Tables Linearity ATyp DTyp Agilent E4419B Press System Inputs Tables A Linea
7. 1 63 6 64 6 65 4 5 66 6 6 67 6 7 68 6 7 69 6 6 70 4 4 3 18 Specifications and Characteristics Table 3 2 Calibration Factor Uncertainty at 1 mW 0 dBm Frequency GHz ISO Expanded Uncertainty 1 coverage factor k 2 71 6 7 72 6 8 73 7 0 74 7 3 75 5 1 1 Refer to Application Note 64 1A Agilent literature number 5965 6630E Fundamentals of RF and Microwave Power Measurements for more information regarding ISO expanded uncertainty V8486A User s Guide Agilent V8486A User s Guide 4 Service Performance Tests 20 Replaceable Parts 21 ee Agilent Technologies 4 Service Performance Tests 20 This section does not establish SWR test procedures since there are several test methods and different equipment available for testing the SWR or reflection coefficient Therefore the actual accuracy of the test equipment all source match corrections and all harmonics must be accounted for when measuring against instrument specifications to determine a pass or fail condition To measure the SWR across the waveguide band use a directional coupler and detector selected for the band of interest The directional coupler should have a directivity greater than 36 dB such as the Agilent V752C D The detector should have greater than 0 4 mV uUW sensitivity and should be calibrated with a rotary vane attenuator with an accuracy of 2 Incident power should be less than 20 dBm A convenient
8. Agilent V8486A Power Sensor User s Guide cae Agilent Technologies Notices Agilent Technologies Inc 2008 2013 No part of this manual may be reproduced in any form or by any means including elec tronic storage and retrieval or translation into a foreign language without prior agree ment and written consent from Agilent Technologies Inc as governed by United States and international copyright laws Manual Part Number 08486 90131 Edition Fourth Edition April 5 2013 Printed in USA Agilent Technologies Inc 3501 Stevens Creek Blvd Santa Clara CA 95052 USA Warranty The material contained in this docu ment is provided as is and is sub ject to being changed without notice in future editions Further to the max imum extent permitted by applicable law Agilent disclaims all warranties either express or implied with regard to this manual and any information contained herein including but not limited to the implied warranties of merchantability and fitness for a par ticular purpose Agilent shall not be liable for errors or for incidental or consequential damages in connec tion with the furnishing use or per formance of this document or of any information contained herein Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms the warranty terms in the sep arate agreement shall control
9. E CONNECTING THE POWER SENSOR TO OTHER INSTRUMENTS ensure that all instruments are connected to the protective earth ground Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury and cause damage to the power sensor CAUTION If the following energy and power levels are exceeded the power meter system may be damaged Maximum Average Power 200 mW Maximum Peak Power 40W 10 micro second pulse 0 5 duty cycle or equivalent such that 200 mW maximum average power and 40W peak power are not exceeded 8 V8486A User s Guide CAUTION V8486A User s Guide General Operation 2 The power sensor has a precision machined V band waveguide interface The size and position of the aperture the alignment holes and pins and the flatness of the mating faces are all very tightly controlled Refer to Figure 2 1 In order to get the best possible measurement results the mating part must be of similar quality Connection to a V band waveguide component in which the interface dimensions are not accurately controlled can lead to increased SWR inaccurate Cal Factor correction and or repeatability problems In addition connections to a well manufactured but dirty part can lead to any of the above measurement problems Conversely always insuring connections to parts with clean high quality waveguide interfaces will lead to accurate power measurements over the life of the product
10. ation 5 Storage and Shipment 6 Environment 6 Original Packaging 6 2 General Operation 7 Operation 8 Operating Environment 8 Operating Precautions 8 Power Meter Calibrations 10 Power Measurements 10 Operating Instructions 12 Modulation Effects 12 Linearity Correction 13 3 Specifications and Characteristics 15 Specifications 16 Calibration Factor CF 17 V8486A User s Guide vii Contents 4 Service 19 Performance Tests 20 Replaceable Parts 21 Repair and Adjustments 21 viii V8486A User s Guide Figures V8486A User s Guide Figure 1 1 Figure 2 1 Agilent V8486A Power Sensor with Accessories and Hardware 2 Precision V band Interface on Front of Power Sensor 9 Figure 2 2 Typical Influence of Temperature on Sensitivity 12 Figures THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK x V8486A User s Guide Tables V8486A User s Guide Table 2 1 Table 3 1 Table 3 2 Table 4 1 Cal Factor 11 Specifications 16 Calibration Factor Uncertainty at 1 mW 0 dBm Replaceable Parts 21 17 xi Tables THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK xii V8486A User s Guide Agilent V8486A User s Guide 1 Introduction General Information 3 Installation 5 Storage and Shipment 6 gy Agilent Technologies 1 Introduction AGILENT V8486 POWER SENSOR FLANGE SCREWS 1390 0671 HEX BALL DRIVER 8710 1539 Figure 1 1 Agilent V8486A Power Sensor with Accessories and Hardware V8486A Use
11. e 40 W peak 10 mW to 100 mW 10 dBm to 20 dBm 2 for EPM power meters 1 3 for all other Agilent power meters Waveguide impedance varies with frequency 50 Q nominal impedance EIA WR 15 When mated to UG 385 U flange Any port lt 1 deviation except for those power ranges noted Operating Temperature Range 0 to 55 C Net Weight 0 4 kg Dimensions Width 38 mm Length 199 mm Height 60 mm 1 Reflection coefficient Rho or p relates to SWR according to the following formula swr P 1 p 2 10 micro second pulse 0 5 duty cycle or equivalent such that 200 mW maximum average power and 40W peak power are not exceeded 16 V8486A User s Guide Calibration Factor CF V8486A User s Guide Specifications and Characteristics 3 The CAL FACTOR compensates for the frequency response of the sensor CAL FACTOR data is provided on a label attached to the sensor cover Uncertainties of the CAL FACTOR data are listed in Table 3 2 ISO expanded uncertainties are calculated based on an NIST traceable transfer standard and an analysis of factory test system uncertainties To use CAL FACTOR data during power measurements see Power Measurements on page 10 Table 3 2 Calibration Factor Uncertainty at 1 mW 0 dBm Frequency GHz ISO Expanded Uncertainty 1 coverage factor k 2 50 4 8 51 6 1 52 5 9 53 5 9 54 5 9 55 4 6 56 6 1 57 6 1 58 6 2 59 6 2 60 4 7 61 6 2 62 6
12. e protective packaging provided with the power sensor to protect it from dirt and mechanical damage whenever it is not in use Any burrs dents or dirt on the flange or waveguide surface will increase the SWR and change the Cal Factor Refer to the power meter operating and service manual for interconnecting instructions 1 Introduction Storage and Shipment Environment The instruments should be stored in a clean dry environment The following limitations apply to both storage and shipment Temperature 40 to 75 C Relative humidity lt 95 at 40 C Altitude lt 7 600 meters Original Packaging Containers and materials identical to those used in factory packaging are available through Agilent Technologies offices If the instrument is being returned to Agilent Technologies for servicing attach a tag indicating the type of service required return address model number and serial number Also mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and serial number 6 V8486A User s Guide Agilent V8486A User s Guide 2 General Operation Operation 8 2 6 Agilent Technologies 2 General Operation Operation Operating Environment The operating environment for the power sensor should be within the following limits Temperature 0 to 55 C Relative humidity lt 95 Altitude lt 4550 meters Operating Precautions WARNING BEFOR
13. high level ac signal output can now be routed by standard cables 1 Introduction CAUTION The Agilent V8486A power sensor is compatible with the following power meters Agilent 435B Agilent E1416A Agilent 436A Agilent E4418A B Agilent 437B Agilent E4419A B Agilent 438A Agilent 70100A To obtain optimum accuracy for power measurements above 10 dBm when used with the Agilent E4418A and Agilent E4419A power meters a firmware upgrade will be required Refer to your Agilent E4418A and Agilent E4419A power meter s user s guide for instructions on how to obtain the revision of the firmware currently installed in the unit The firmware revision required is A1 03 00 or above for the Agilent E4418A and A2 03 00 or above for the Agilent E4419A Contact your local Agilent Technologies Sales and Service Office for more information In application the power sensor is connected between a microwave source and a compatible power meter The power sensor provides a matched load for the microwave source for very low SWR The power meter indicates the power dissipated in the load in uW mW or in dBm Do not disassemble the power sensor The power sensor is extremely static sensitive and can be easily damaged Accessories Included is a hex ball driver plus the waveguide mounting screws Refer to Figure 1 1 for a visual check of what should be included with your power sensor Recommended Calibration Interval Agilent Technologies recommends a
14. license and may be used or copied only in accordance with the terms of such license V8486A User s Guide Safety Summary Safety Notices The following general safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies Inc assumes no liability for the customer s failure to comply with these requirements A WARNING notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly performed or adhered to could result in personal injury or loss of life Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met CAUTION A CAUTION notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly performed or adhered to could result in damage to the product or loss of important data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met V8486A User s Guide vi THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK V8486A User s Guide Contents 1 Introduction 1 General Information 3 Warranty 3 Description 3 Accessories 4 Recommended Calibration Interval 4 Installation 5 Initial Inspection 5 Interconnections and Calibr
15. lting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY Restricted Rights Legend Technology Licenses The Software and Documentation have been developed entirely at private expense They are delivered and licensed as commercial computer software as defined in DFARS 252 227 7013 Oct 1988 DFARS 252 211 7015 May 1991 or DFARS 252 227 7014 Jun 1995 as a commercial item as defined in FAR 2 101 a or as restricted computer software as defined in FAR 52 227 19 Jun 1987 or any equivalent agency regulation or contract clause whichever is applicable You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product involved The hardware and or software described in this document are furnished under a
16. one year calibration cycle for the V8486A power sensor V8486A User s Guide Installation Introduction 1 Initial Inspection Inspect the shipping container for damage If the shipping container or packaging material is damaged it should be kept until the contents of the shipment have been checked mechanically and electrically If there is mechanical damage or if the instrument does not pass the performance tests notify the nearest Agilent Technologies office Keep the damaged shipping materials if any for inspection by the carrier and a Agilent Technologies representative Interconnections and Calibration CAUTION V8486A User s Guide The Agilent V8486A power sensor has two inputs a Type N connector and a waveguide flange During calibration the Type N connector is connected to the calibration port of the power meter During measurement the waveguide flange is connected to the device under test Connect the power sensor by turning only the nut on the Type N connector Damage can occur if torque is applied to the power sensor body The waveguide flanges can be damaged if the flange screws are over tightened Do not fully tighten one flange screw without tightening the one opposite First insert screws and tighten until finger tight If you are using the hex ball driver hold the driver between thumb and forefinger while incrementally tightening screws opposite each other until reaching a maximum torque of 0 42 N x m Use th
17. r s Guide Introduction 1 General Information This User s guide contains information about initial inspection and operation of the Agilent V8486A power sensor Warranty The power sensor is warranted and certified as indicated on the last page of this manual Do not open the power sensor Any attempt to disassemble the power sensor will void warranty Description V8486A User s Guide The Agilent V8486A is a diode based power sensor It measures power levels in a range from 30 dBm to 20 dBm Specifications for the power sensor are in Table 3 1 on page 16 The Agilent V8486A measures at frequencies from 50 GHz to 75 GHz The power is determined from the ac voltage developed across the waveguide termination from the microwave source The diodes convert this ac voltage to dc The dc voltage produced is proportional to the square of the ac voltage The dc voltage thus generated is a very low level voltage and requires amplification before it can be transferred via the sensor cable to the power meter The amplification is provided by an input amplifier assembly which consists of a chopper sampling gate and an input amplifier The dc voltage is routed to the chopper circuit which converts the low level dc voltage to an ac voltage The chopper is driven by a square wave generated by the power meter The result is an ac output signal proportional to the dc input The ac signal is then amplified by the input amplifier The relatively
18. rity ATyp DTyp or B Linearity ATyp DTyp For use with the Agilent E4418A and Agilent E4419A power meters a firmware upgrade will be required Refer to your Agilent E4418A and Agilent E4419A power meter s user s guide for instructions on how to obtain the revision of the firmware currently installed in the unit The firmware revision required is A1 03 00 or above for the Agilent E4418A and A2 03 00 or above for the Agilent E4419A Contact your local Agilent Technologies Sales and Service Office for further information V8486A User s Guide 13 2 General Operation THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK 14 V8486A User s Guide Agilent V8486A User s Guide 3 Specifications and Characteristics Specifications 16 Calibration Factor CF 17 phe Agilent Technologies 15 3 Specifications and Characteristics Specifications The specifications listed in Table 3 1 are the performance standards or limits against which the power sensor may be tested Table 3 1 Specifications Characteristics and Conditions Limits Comments Frequency Range Power Range Nominal Impedance Connectors 50 MHz Calibration Port Waveguide Flange Maximum Standing Wave Ratio SWR and Reflection Coefficient Rho Agilent V8486A Maximum Power Worst Case Power Linearity 50 to 75 GHz 1 uW to 100 mW 30 dBm to 20 dBm N A Type N Male UG 385 U Flange Modified SWR Rho 1 06 0 029 200 mW averag
19. source is a frequency multiplier driven by an Agilent 8360 B Series swept signal generator To check the calibration factor the power sensor should be compared with another recently calibrated power sensor The source should be leveled with a reference coupler that has low SWR and high directivity to monitor or level the incident power For calibration factor and error analysis we suggest Agilent Application Note 64 1A Agilent literature number 5965 6630E Fundamentals of RF and Microwave Power Measurements V8486A User s Guide Service 4 Replaceable Parts CAUTION V8486A User s Guide The part numbers of the hex ball driver and the hardware are listed in Figure 1 1 on page 2 In addition the following protective parts are replaceable Table 4 1 Replaceable Parts Part Number Description Usage 1401 0214 protective cap Type N connector 08486 40103 protective cover V band waveguide flange There are no other replaceable parts for this product A listing of Agilent Technologies sales and service offices is located at the end of this manual Repair and Adjustments Do not attempt to repair or adjust the power sensor Due to the extreme static sensitivity of the power sensor customer repair is not recommended If your power sensor should fail or need calibration return it to Agilent Technologies Do not disassemble the power sensor The power sensor is extremely static sensitive and can be easily
20. tion of Warranty V8486A User s Guide Agilent Technologies certifies that this product met its published specifications at the time of shipment Agilent further certifies that its calibration measurements are traceable to the United States National Institute of Standard and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of 3 years from date of shipment During the warranty period Agilent Technologies will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by Agilent Technologies Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies warrants that its software and firmware designated by Agilent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument Agilent Technologies does not warrant that the operation of the instrument or firmware will be uninterrupted or error free The foregoing warranty shall not apply to defects resu
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