Keysight 86205A Operating And Service Manual
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Keysight 86205A Operating And Service Manual

Keysight 86205A Operating And Service Manual

Directional bridge
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Keysight 86205A
Directional Bridge
Operating and
Service Manual

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Summary of Contents for Keysight 86205A

  • Page 1 Keysight 86205A Directional Bridge Operating and Service Manual...
  • Page 2 Declarations of Conformity for this product ceed beyond a CAUTION notice until the indi- DFARS and are set forth specifically in writing and for other Keysight products may be down- cated conditions are fully understood and met. elsewhere in the EULA. Keysight shall be loaded from the Web.

  • Page 3: Waste Electrical And Electronic Equipment (Weee) Directive

    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 links on the following Keysight websites: – www.keysight.com/find/mta (product-specific information and support, software and documentation updates) –...
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  • Page 5: Table Of Contents

    ............43 Keysight 86205A Operating and Service Manual...
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  • Page 7: List Of Figures

    List of Figures Figure 2-1 86205A bridge ports and measurement paths ....17 Figure 2-2 Location of threaded mounting holes ......18...
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  • Page 9: List Of Tables

    Environmental requirements ....... . 43 Keysight 86205A Operating and Service Manual...
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  • Page 11 Keysight 86205A Directional Bridge Operating and Service Manual General Information Manual Overview Initial Inspection This manual contains information for operating, testing, and servicing 86205A bridge.

  • Page 12: General Information

    Manual Overview Product description 86205A is a high performance 50W directional bridge designed for high quality reflection measurements and external source leveling applications 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 directional couplers, such as power monitoring and closed-loop leveling applications.

  • Page 13: Initial Inspection

    – failed electrical test If you find damage or signs of stress to the shipping container or the cushioning material, keep them for the carrier's inspection. Keysight does not wait for a claim settlement before arranging for repair or replacement.
  • Page 14 General Information THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 86205A Operating and Service Manual...
  • Page 15 Operation Operation Overview Bridge Operation Bridge Features Operating Precautions Measurement Configurations Keysight 86205A Operating and Service Manual...

  • Page 16: Operation

    Operation Overview This chapter includes the following information on Keysight 86205A directional bridge: – bridge operation – bridge features – operating precautions – measurement configurations Keysight 86205A Operating and Service Manual...

  • Page 17: Bridge Operation

    Table 2-1 Port orientation with corresponding application Application Part number Reflection measurement Power monitoring/leveling Test port Input Input port Output Coupled Coupled level Figure 2-1 86205A bridge ports and measurement paths Keysight 86205A Operating and Service Manual...

  • Page 18: Bridge Features

    – Coupled arm flatness of ±0.2 dB from nominal 86205A operates over an RF frequency range of 300 kHz to 6 GHz and has excellent directivity for high quality reflection measurements. Additionally, the bridge has a very low insertion loss of 1.5 dB which means more power to the device under test;...

  • Page 19: Operating Precautions

    30 VDC to port 1 or 2 of the bridge. Higher current/power/voltage can electrically damage the bridge. Before you connect a cable to the bridge, always discharge the cable's center conductor static electricity to instrument-ground. Do not drop the bridge or subject it to mechanical shock. Keysight 86205A Operating and Service Manual...

  • Page 20: Measurement Configurations

    Operation Measurement Configurations This section shows 86205A directional bridge in the following configurations: – remote reflection measurement using 8711 network analyzer – vector impedance measurement using two bridges and 8753 network analyzer – external power leveling with or without a controller –...

  • Page 21: Vector Impedance Measurement Configuration

    3 Make a measurement calibration by pressing one of the following key sequences: Cal Kit, N 50W Return, Calibrate menu RESPONSE connect either an open or short calibration device to the reference plane and press the corresponding OPEN (F) or SHORT (F) key. Keysight 86205A Operating and Service Manual...

  • Page 22: External Power Leveling Configuration

    4 Enable the power meter/ sensor cal factor array. For operating information on the power meter refer to its operating manual. 5 Connect the power sensor to the bridge as shown in Figure 2-5. Keysight 86205A Operating and Service Manual...
  • Page 23 The 16 dB coupling factor is partially compensated by the through loss (1.5 dB) to give a 14.5 dB NOTE effective coupling factor (relative to the bridge output port). The bridge coupling flatness has as good as 0.1 dB/GHz power level roll-off with <±0.2 dB error. Keysight 86205A Operating and Service Manual...

  • Page 24: Reflection Measurement Configuration

    6 Measure the DUT by connecting it to port 1 of the bridge.Terminate the second port of a two-port DUT. 7 Press MKR and position the marker with the front panel knob to measure the return loss at the frequency of interest. Keysight 86205A Operating and Service Manual...
  • Page 25 Performance Tests Performance Tests Introduction Function Test Return Loss Test Directivity Test Keysight 86205A Operating and Service Manual...

  • Page 26: Performance Tests

    Record the results of the performance tests on the test record that is located at the end of this chapter. Tables are also provided for recording the results of the functional test and connector pin depth measurements. Keysight 86205A Operating and Service Manual...

  • Page 27: Function Test

    Equipment setup 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 as shown in Figure 3-2. Keysight 86205A Operating and Service Manual...

  • Page 28: Figure 3-2 Equipment Setup For Insertion Loss Measurement

    5 Press MIN to find the minimum value and record it also. 6 Connect the equipment as shown in Figure 3-3. Keysight 86205A Operating and Service Manual...

  • Page 29: In Case Of Failure

    Verify that the calibration kit devices are within their tolerances. Check adapters and cables to make sure that they are not broken. If the bridge appears to be bad, it must be replaced. It can only be repaired at the factory. Keysight 86205A Operating and Service Manual...

  • Page 30: Return Loss Test

    5 When prompted, connect the standards as shown in Figure 3-4. When measuring the open and short devices, select OPEN (m) and SHORT (m) on the analyzer. NOTE The selection must correspond to the test port, not the device being measured. Keysight 86205A Operating and Service Manual...

  • Page 31: Figure 3-4 Equipment Setup For A 522 1-Port Measurement Calibration

    10 Connect the equipment as shown in Figure 3-5 to measure the return loss. Do not use a female load with a type-N adapter, since an adapter has poor return loss and may NOTE affect the measurement. Keysight 86205A Operating and Service Manual...

  • Page 32: Figure 3-5 Equipment Setup For Return Loss Measurement On Port

    Write the value on the test record located at the end of this chapter. 15 Connect the equipment as shown in Figure 3-6 and repeat steps 11 through 14 to find the return loss on port 3. Keysight 86205A Operating and Service Manual...
  • Page 33 Figure 3-7 and repeat steps 11 through 14 to find the return loss on port 2. KEYSIGHT 8753C NETWORK ANALYZER KEYSIGHT 86025A DIRECTIONAL BRIDGE Figure 3-7 Equipment setup for return loss measurement on port 2 Keysight 86205A Operating and Service Manual...

  • Page 34: In Case Of Failure

    Verify that the calibration kit devices are within their tolerances. Check adapters and cables to make sure that they are not broken. If the bridge appears to be bad, it must be replaced. It can only be repaired at the factory. Keysight 86205A Operating and Service Manual...

  • Page 35: Directivity Test

    SWEEP TYPE MENU, LOG FREQ 5 Make a S22 one-port calibration (to calibrate A/R, even though test port appears to be port 2), by pressing: CAL KIT, N 50 ohm RETURN, CALIBRATE MENU, S22 1-PORT Keysight 86205A Operating and Service Manual...
  • Page 36 The resulting display is the uncorrected load data (the last measurement taken during the calibration), normalized to the frequency response of the system. 8 Find the worst-case directivity value, by pressing: MKR FCTN MARKER SEARCH MAX Keysight 86205A Operating and Service Manual...

  • Page 37: In Case Of Failure

    In case of failure Check connectors for damage. Clean and gage connectors. Verify that the calibration kit devices are within their specifications. Check adapters and cables to make sure that they are not broken. Keysight 86205A Operating and Service Manual...

  • Page 38: Figure 3-9 86205A Test Record (1 Of 3)

    Performance Tests Figure 3-9 86205A test record (1 of 3) Keysight 86205A Operating and Service Manual...

  • Page 39: Figure 3-10 86205A Test Record (2 Of 3)

    Performance Tests Figure 3-10 86205A test record (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 of ±3 times the equivalent standard deviation (3s) and is intended to represent a 99% confidence level.

  • Page 40: Figure 3-11 86205A Test Record (3 Of 3)

    Performance Tests Figure 3-11 86205A test record (3 of 3) Keysight 86205A Operating and Service Manual...
  • Page 41 Keysight 86205A Directional Bridge Operating and Service Manual Maintenance Mating Connectors Environment...

  • Page 42: Maintenance

    The Microwave Connector Care Manual (part number 08510-90064) provides information on the proper maintenance, inspection, and gaging of connectors. When tightening a connector, do not apply more than 9.2 cm-kg (12 lb-in) of torque. Greater CAUTION torque can deform the mating surfaces. Keysight 86205A Operating and Service Manual...

  • Page 43: Environment

    – Storage and shipment Up to 95%. Protect the bridge from temperature extremes, which can cause condensation. Al titude – Operating Up to 7,620m (25,000 feet) – Storage and shipment Up to 7,620m (25,000 feet) Keysight 86205A Operating and Service Manual...
  • Page 44 Maintenance THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 86205A Operating and Service Manual...
  • Page 45 This information 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 www.keysight.com...

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