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Keysight 86205A Directional Bridge
Operating and Service Manual

41

4

Maintenance

Mating Connectors

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Summary of Contents for 86205A

Page 1: ...Keysight 86205A Directional Bridge Operating and Service Manual...

Page 2: ...ghts customarily provided to the public to use modify reproduce release perform dis play or disclose commercial computer soft ware or commercial computer software documentation No additional governmen...

Page 3: ...toring 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 Ce...

Page 4: ...4 Keysight 86205A Operating and Service Manual THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 5: ...ge Features 18 Operating Precautions 19 Measurement Configurations 20 Remote reflection measurement configuration 20 Vector impedance measurement configuration 21 External power leveling configuration...

Page 6: ...6 Keysight 86205A Operating and Service Manual THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 7: ...ement calibration 27 Figure 3 2 Equipment setup for insertion loss measurement 28 Figure 3 3 Equipment setup for coupling loss measurement 29 Figure 3 4 Equipment setup for a 522 1 port measurement ca...

Page 8: ...8 Keysight 86205A Operating and Service Manual THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 9: ...ble 2 1 Port orientation with corresponding application 17 Table 3 1 Recommended equipment for function test 27 Table 3 2 Recommended equipment for return loss test 30 Table 3 3 Recommended equipment...

Page 10: ...10 Keysight 86205A Operating and Service Manual THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 11: ...ht 86205A Directional Bridge Operating and Service Manual 11 1 General Information Manual Overview 12 Initial Inspection 13 This manual contains information for operating testing and servicing 86205A...

Page 12: ...s over an RF frequency range of 300 kHz to 6 GHz The bridge achieves a low through loss of 1 5 dB and a high coupling factor of 16 dB These characteristics make it useful in applications requiring dir...

Page 13: ...electrically Refer to the Chapter 3 Performance Tests for procedures that check the bridge electrically If any of the following conditions exist notify your nearest Keysight office incomplete shipmen...

Page 14: ...1 General Information 14 Keysight 86205A Operating and Service Manual THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 15: ...Operation 2 Keysight 86205A Operating and Service Manual 15 2 Operation Overview 16 Bridge Operation 17 Bridge Features 18 Operating Precautions 19 Measurement Configurations 20...

Page 16: ...sight 86205A Operating and Service Manual Overview This chapter includes the following information on Keysight 86205A directional bridge bridge operation bridge features operating precautions measurem...

Page 17: ...in a power monitoring or leveling configuration The figure identifies the paths and ports of the bridge and shows the electrical characteristics of each path Figure 2 1 86205A bridge ports and measure...

Page 18: ...iers and TWTs The bridge also features a 0 2 dB flatness from the nominal 16 dB coupled arm This capability is valuable in external leveling applications where a power meter or diode detector is used...

Page 19: ...occurs most often as you connect or disconnect a device Use the bridge at a static safe workstation and wear a grounding strap Never touch the input connector center contacts or the contact pins of a...

Page 20: ...cated on a tower To set up the measurement 1 Connect the equipment as shown in Figure 2 3 Figure 2 3 Remote directivity measurement setup 2 Set the parameters on the analyzer to measure with an extern...

Page 21: ...enter the power value and press x1 NUMBER OF POINTS then enter the desired number START then enter the start frequency and press x1 STOP then enter the stop frequency and press x1 3 Make a measurement...

Page 22: ...d 8753 and 8625 sources can alternatively be used in this automated measurement configuration By substituting a frequency counter for the power meter this configuration can be used for signal monitori...

Page 23: ...the correction information at each frequency point by pressing Mtr Meas Menu Measure Corr All 9 When a message is displayed indicating the operation is complete apply the flatness correction array to...

Page 24: ...desired center frequency and span to view the DUT 4 Replace the DUT with a short circuit 5 Normalize the trace by pressing TRACE TRACE B CLEAR WRITE B BLANK B MORE 1 OF 3 NORMALIZE ON 6 Measure the D...

Page 25: ...Performance Tests 3 Keysight 86205A Operating and Service Manual 25 3 Performance Tests Introduction 26 Function Test 27 Return Loss Test 30 Directivity Test 35...

Page 26: ...below The functional test checks the bridge s typical operation The return loss test verifies that the bridge operates within the return loss specification The directivity test verifies that the brid...

Page 27: ...for a thru measurement calibration 2 To perform a thru measurement calibration press the following keys on 8753 PRESET MEAS S21 CAL CALIBRATE MENU RESPONSE THRU DONE RESPONSE 3 Connect the equipment...

Page 28: ...ing keys SCALE 1 x1 MKR FCTN MARKER SEARCH MAX The insertion loss shown on the display should be between 0 and 3 dB Write the maximum insertion loss on the test record located at the end of this chapt...

Page 29: ...18 dB Write the maximum coupling loss on the test record located at the end of this chapter In case of failure Check connectors for damage Clean and gage connectors Verify that the calibration kit de...

Page 30: ...WER 20 x1 4 Perform a one port calibration on port 2 by pressing CAL CAL KIT N 50 ohm RETURN CALIBRATE MENU S22 1 PORT 5 When prompted connect the standards as shown in Figure 3 4 Table 3 2 Recommende...

Page 31: ...pressing CH2 MEAS S22 MENU COUPLED CH OFF SWEEP TYPE MENU LIN FREQ START 2 G n STOP 3 G n 8 Repeat steps 4 and 5 to perform a one port calibration on port 2 9 Save the calibration in a register by pr...

Page 32: ...EARCH MAX Write the value on the test record located at the end of this chapter 13 Trigger a new sweep by pressing CH2 MENU MEASURE RESTART 14 Find the worst case return loss from 2 to 3 GHz by pressi...

Page 33: ...on port 3 16 Connect the equipment as shown in Figure 3 7 and repeat steps 11 through 14 to find the return loss on port 2 Figure 3 7 Equipment setup for return loss measurement on port 2 KEYSIGHT 87...

Page 34: ...lure Check connectors for damage Clean and gage connectors Verify that the calibration kit devices are within their tolerances Check adapters and cables to make sure that they are not broken If the br...

Page 35: ...erence line up so that the data trace can be seen by pressing RETURN TRIGGER MENU HOLD SCALE REF REFERENCE POSITION 8 x1 4 Set up a log frequency sweep from 300 kHz to 5 MHz by pressing STOP 5 M m MEN...

Page 36: ...CUTE TEST DISPLAY DATA MEM CAL CORRECTION OFF The resulting display is the uncorrected load data the last measurement taken during the calibration normalized to the frequency response of the system 8...

Page 37: ...START 5 M m STOP 3 G n MENU SWEEP TYPE MENU LIN FREQ 10 Repeat steps 5 through 8 You will need to use the marker manually to find the worst case value in one of the two remaining frequency spans In c...

Page 38: ...3 Performance Tests 38 Keysight 86205A Operating and Service Manual Figure 3 9 86205A test record 1 of 3...

Page 39: ...2 of 3 The measurement uncertainty is quoted for these performance tests using only the recommended models specified at the beginning of each test The measurement uncertainty quoted represents limits...

Page 40: ...3 Performance Tests 40 Keysight 86205A Operating and Service Manual Figure 3 11 86205A test record 3 of 3...

Page 41: ...Keysight 86205A Directional Bridge Operating and Service Manual 41 4 Maintenance Mating Connectors 42 Environment 43...

Page 42: ...s The Microwave Connector Care Manual part number 08510 90064 provides information on the proper maintenance inspection and gaging of connectors CAUTION When tightening a connector do not apply more t...

Page 43: ...vironmental requirements Parameter Required values ranges Temperature Operating Storage and shipment 0 to 55 C 25 to 75 C Humidity Operating Storage and shipment Up to 95 Protect the bridge from tempe...

Page 44: ...4 Maintenance 44 Keysight 86205A Operating and Service Manual THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 45: ...n is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 1992 2019 Edition 2 March 12 2019 Printed in Malaysia 86205 90001 86205 90001 w...

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