Keysight 8473B, Operating And Service Manual

Page 1: ...Keysight 8473B C Detectors Operating and Service Guide ...

Page 2: ...e rights customarily provided to the public to use modify reproduce release per form display or disclose commercial computer software or commercial com puter software documentation No additional government requirements beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer software pu...

Page 3: ...ring and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Service Center or visit http about keysight com en companyinfo environment takeback shtml for more information Sales and Technical Support To contact Keysight for sales and technical support refer to the support ...

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Page 5: ...s 12 2 Specifications Product Specifications 14 Environmental Specifications 16 Physical Specifications 17 3 Installation Operation and Service Installation 20 Initial inspection 20 Mating connectors 20 Storage and Shipment 21 Environment 21 Original packaging 21 Operating information 22 Frequency response 23 Operator s checks 24 Performance Tests 26 Frequency response test 26 High level sensitivi...

Page 6: ...6 Keysight 8473B C Operating and Service Guide Adjustments 28 Service 28 ...

Page 7: ...Keysight 8473B C Operating and Service Guide 7 List of Figures Figure 3 1 Typical frequency response of the 8473B or 8473C detector 23 Figure 3 2 Peak power measurement 24 ...

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Page 9: ...Keysight 8473B C Operating and Service Guide 9 List of Tables Table 2 1 Product specifications 14 Table 2 2 Environmental specifications 16 Table 2 3 Physical specifications 17 ...

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Page 11: ...Keysight 8473B C Detectors Operating and Service Guide 11 1 Introduction Overview 12 This chapter introduces the 8473B and 8473C crystal detectors and its available Options ...

Page 12: ...or module uses a Low Barrier Schottky diode and thin film matching circuit that yield high sensitivity and broadband performance The detector measures relative power up to 200 mW and has a BNC female connector for the output jack which allows the detected output to be connected to a SWR meter The output voltage polarity is negative unless Option 003 is selected The frequency range is 10 MHz to 18 ...

Page 13: ...tors Operating and Service Guide 13 2 Specifications Product Specifications 14 Environmental Specifications 16 Physical Specifications 17 This chapter provides an overview specifications of Keysight 8473B C crystal detector ...

Page 14: ...dB over any octave to 8 GHz 0 01 to 12 4 GHz 0 3 dB 0 01 to 20 GHz 0 6 dB 20 to 26 5 GHz 1 5 dB from a 3 3 dB linear slope Maximum operating input power 200 mW peak or average 200 mW peak or average Maximum short term input power 1 watt typical peak or average for 1 minute 1 watt typical peak or average for 1 minute Sensitivity a d Low level 20 dBm High level 0 5 mV μW 0 35 mW produces 100 mV outp...

Page 15: ... GHz 0 2 dB 0 01 to 18 GHz 0 3 dB Matched detector pair 0 01 to 12 4 GHz 0 2 dB 0 01 to 18 GHz 0 3 dB 0 01 to 26 5 GHz 0 5 dB 002 By choosing Option 002 the deviation from ideal square law response will be 0 5 dB although the sensitivity specification is decreased by a factor of 4 Square law load Square law load 003 Positive polarity output Positive polarity output a Specifications given for 25 C ...

Page 16: ...ve Vibration 20 G from 80 to 2 000 Hz 20 G from 80 to 2 000 Hz Shock 100 G for 11 ms 100 G for 11 ms Altitude 4 570 m 15 000 ft 4 570 m 15 000 ft Storage The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment Temperature 54 C to 85 C Humidity 95 relative Altitude 7 620 meters 25 000 feet Shock 100 G for 11 ms Vibration ...

Page 17: ...d Service Guide 17 Physical Specifications Table 2 3 Physical specifications 8473B 8473C Weight Net 14 g 0 5 oz Net 14 g 0 5 oz Dimension 48 mm long 10 mm diameter 1 9 in long 0 38 in diameter 48 mm long 10 mm diameter 1 9 in long 0 38 in diameter ...

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Page 19: ...and Service Installation 20 Storage and Shipment 21 Performance Tests 26 Adjustments 28 Service 28 This chapter describes the installation and operating procedures for the crystal detectors It also describes the available performance tests used for testing the detector specifications ...

Page 20: ...ge 26 If the contents are incomplete if there is mechanical damage or defect or if the instrument does not pass the electrical performance test notify the nearest Keysight office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Keysight office Keep the shipping materials for the carrier s inspection At Keysight s option the off...

Page 21: ...er Also mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and serial number CAUTION Static discharge can damage the detector module A 100 pF capacitor 1 2 m 4 ft of coax cable charged to 14 volts stores 10 8 joules the maximum pulse rating of the detector module Connect cables to test equipment and discharge the center conductor bef...

Page 22: ...and shunted with a resistor Ideally this resistor should be 50 Ω to terminate the coaxial cable properly However with 50 Ω resistance the output video pulse may be too small to drive some oscilloscopes Therefore the cable should be shunted with the smallest value of resistance that will obtain suitable deflection on the oscilloscope typically the value will lie between 50 Ω and 2 KΩ The larger the...

Page 23: ...uit was optimized for flat frequency response and low SWR which yields improved performance in leveling loops and power monitoring applications Figure 3 1 shows the typical frequency response of the crystal detector Figure 3 1 Typical frequency response of the 8473B or 8473C detector Specifications Typical 8473B C Response Specifications ...

Page 24: ...angement of equipment for peak power measurement is shown in Figure 3 2 The procedure involves calibration of an oscilloscope which in turn is used to calibrate a CW generator Pulse Source Continuous Wave Generator Continuous Wave Generator Step Step Step 1 2 3 Oscilloscope Oscilloscope Vertical Vertical Thermistor Mount Power Meter Crystal Detector Crystal Detector ...

Page 25: ...ase to peak amplitude of the pulse envelope 2 Replace the pulse source with a CW generator While observing the oscilloscope trace adjust amplitude of CW generator output to make detector output equal to that of the pulse generator as indicated by markings on graticule step 1 3 Leave CW generator at setting obtained in step 2 Disconnect detector from CW generator Connect output of CW generator to p...

Page 26: ...t changing RF power level of signal source disconnect power sensor 3 Connect detector to attenuator Measure DC voltage output from detector output from detector and record measurement 4 Change frequency of signal source and repeat steps 1 through 3 5 Since the detector follows a square law response at this power level it s output is proportional to power PdB 10 log Vo 6 Total variation of detector...

Page 27: ...r Connect attenuator to signal source and power sensor to attenuator Adjust RF power level for 20 dBm output from attenuator Verify the ambient temperature Disconnect power sensor from attenuator and connect detector Measure the DC voltage output from detector The output should be 5 0 mV up to 18 GHz for the 8473B C and 1 8 mV from 18 to 26 5 GHz for the 8473C at 25 C Between 20 C and 30 C with 20...

Page 28: ...n Operation and Service 28 Keysight 8473B C Operating and Service Guide Adjustments The detector has no internal adjustments Service Additional maintenance information can be obtained from the local Keysight office ...

Page 29: ...n is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 2014 2019 Edition 5 January 16 2019 Printed in Malaysia 08473 90003 08473 90003 www keysight com ...