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Agilent Technologies 85037A Operating And Service Manual

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Operating and Service Manual
Agilent Technologies
85037A/B
Precision Detectors
Serial Numbers
This manual applies directly to Agilent 85037A/B detectors with serial
number 00101 and above.
Part Number: 85037-90013
Printed in USA
October 2002
Supersedes November 2001
© Copyright 1992–1993, 2001, 2002 Agilent Technologies, Inc.

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  • Page 1 Operating and Service Manual Agilent Technologies 85037A/B Precision Detectors Serial Numbers This manual applies directly to Agilent 85037A/B detectors with serial number 00101 and above. Part Number: 85037-90013 Printed in USA October 2002 Supersedes November 2001 © Copyright 1992–1993, 2001, 2002 Agilent Technologies, Inc.
  • Page 2 Notice. The information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
  • Page 3 HE WARRAN Y ERMS IN HE SEPARA E AGREEMEN WILL CON ROL. Assistance roduct maintenance agreements and other customer assistance agreements are available for Agilent products. For any assistance, contact your nearest Agilent Technologies Sales and Service Oce. Refer to Table 6-3, \Contacting Agilent" in Chapter 6.
  • Page 4 Safety Notes he following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. denotes a hazard. It calls attention to a procedure that, if aution Caution not correctly performed or adhered to, could result in damage to or destruction of the instrument.

  • Page 5: Table Of Contents

    Cable Lead Identi cation ... Mating Connectors ....Connecting an 85037A/B ... Mating a Precision 3.5 mm Connector to an SMA Connector .
  • Page 6 Operation ....Zeroing an 85037A/B ... . AC Detection Measurements ...
  • Page 7 7. Service Error Messages ....Repair ....Replacing the Detector .
  • Page 8 4-4. Additional Equipment ... . 4-12 4-5. est Record for 85037A ... . 4-13 4-6. est Record for 85037A Option 001 ..

  • Page 9: General Information

    General Information Introduction his manual contains information on operating, testing, and servicing the Agilent 85037A and 85037B precision detectors. Figure 6-1 shows the detectors and the supplied cable marker kit. he Agilent 85037A/B precision detectors are speci cally designed Product Description...

  • Page 10: Accessories

    Accessories able 6-2 lists accessories available for use with these detectors. Equipment Required but Not Supplied able 1-4 lists the equipment required to test the detectors. You Recommended Test may substitute any equipment that meets the indicated critical Equipment speci cations. Re ection and transmission measurements require the following Reflection or equipment:...
  • Page 11 0.01 dB/ C temp. change after calibration. Temperature Coecient of Linearity The 85037A/B speci cations only apply when used with the 8757D scalar network analyzer. 0 dBm, 25 The corrected speci cations apply after a calibration via the 8757D Option 002 internal calibrator.
  • Page 12 0.01 dB/ C temp. change after calibration. Temperature Coecient of Linearity The 85037A/B speci cations only apply when used with the 8757D scalar network analyzer. 0 dBm, 25 The corrected speci cations apply after a calibration via the 8757D Option 002 internal calibrator.
  • Page 13 RF Connector Mechanical Tolerances (85037A) Type-N male Recession of the male center conductor 0.207 to 0.210 in (85037A Option 001) Precision 7 mm Recession of the center conductor 0 to 0.003 in Collet resilience After you depress the collet, it must spring back out.
  • Page 14 Speci cations Part Number ype-N Connector Gage Kit Required for 85037A 85054-80011 No substitute 7 mm Connector Gage Kit Required for 85037A Option 001 85050-80012 No substitute 3.5 mm Connector Gage Kit Required for 85037B 11752-60105 No substitute Collet Extractor ool...

  • Page 15: Installation Safety Considerations

    Installation Safety here are no hazardous voltages in this detector. Considerations Initial Inspection 1. Check the shipping container and packaging material for damage. 2. Check that the shipment is complete. 3. Check connector, cable, and detector body for mechanical damage. 4.

  • Page 16: Preparation For Use

    Preparation for Use Do not subject the detector to mechanical shock. aution ESD can damage the highly sensitive microcircuits in this device; Electrostatic Discharge charges as low as 100 V can destroy a detector. (ESD) ESD damage occurs most often as you connect or disconnect a device.

  • Page 17: Power Requirements

    Connect a detector to the network analyzer as follows: onnecting an 85037A/B 1. With the cable plug key downward, insert the DC connector into the analyzer mating connector. 2. o secure the DC connector in the analyzer, turn the...

  • Page 18: Mating A Precision 3.5 Mm Connector To An Sma Connector

    Mating a Precision 3.5 mm Connector to an MA Connector It is possible to mate a precision 3.5 mm connector to an SMA connector, but this is not ideal because the two connectors have slightly di erent dimensions and mechanical characteristics. Mating a precision 3.5 mm connector to an SMA connector also a ects the electrical performance.
  • Page 19 Figure 2-3. MA and 3.5 mm Connector Cross- ections and WR Performance Installation 2-5...

  • Page 20: Operating Environment

    perating Temperature C to +55 Environment Humidity Up to 95%. Protect the detector from temperature extremes, which can cause condensation. Altitude Up to 7,620m (25,000 ft). Storage and Shipment Store or ship the detectors in environments within the following Environment limits: Temperature C to +75...

  • Page 21: Returning A Detector For Service

    Returning a If you ship the detector to a Agilent oce or service center ll out a service tag (provided at the back of this manual), and include the Detector for Service following information: 1. Company name and address. use an address with a P.O. box number because products Do not cannot be returned to a P.O.
  • Page 23 Operation perating Theory he 85037A/B can detect either unmodulated RF signals (DC mode) or square wave amplitude modulated RF signals (AC mode). In either detection mode, the detector provides a 27.778 kHz square wave signal to the analyzer to interpret and display.
  • Page 24 Connector Torque ighten the 85037A type-N connector nger-tight only. Values ighten the 85037A Option 001 with a torque wrench, part number 8710-1766 set at 13.8 cm-kg (12 in-lb). ighten the 85037B with a torque wrench part number 8710-1764 set at 9.2 cm-kg (8 in-lb).

  • Page 25: Operating Modes And Speci Cations

    perator's Check See \Characterizing the Detector" in this chapter for a procedure that allows you to quickly check the detector. his procedure can be used as a daily check. perating Modes he Agilent 85037 series precision detectors have built-in corrections for both frequency range and dynamic accuracy.

  • Page 26: Measurement System Con Guration

    However, if the frequency the detector sees is di erent from what is being swept (for example, when using a mixer or multiplier), then the user must manually enter the correct detector frequencies as follows: 1. Press CAL 5 2. Select MORE 3.

  • Page 27: Dc Detection Measurements

    DC zero so it is not necessary to perform the zero before performing the characterization. Zeroing an 85037A/B When making DC-mode measurements, you must perform a zeroing operation to compensate for the e ects of DC drift and temperature uctuations.

  • Page 28: Ac Detection Measurements

    Before you zero the detector, remove RF signals from the detector Note input. Even a small RF signal present during zeroing produces measurement errors. he 8757D analyzer has three types of zeroing: Autozero turns o the source RF signal output and AUTOZRO automatically zeroes the detector.

  • Page 29: Characterizing The Detector (Performing A Power Calibration)

    Characterizing the o obtain the best accuracy, and to meet the \corrected" dynamic accuracy speci cations, each detector must be characterized on the Detector (Performing 8757D input on which it will be used. he characterization routine a Power Calibration) simultaneously corrects both AC DC measurements.

  • Page 31: Performance Tests Introduction

    Performance Tests Introduction Use the procedures in this chapter to test the detector's electrical performance to the speci cations listed in Chapter 1. None of these tests require access to the detector's interior. o completely test each detector, three tests are required: 1.

  • Page 32: Return Loss At A Nominal 10 Dbm

    Return Loss at a Nominal 10 dBm he return loss of the 85037 can be measured using the test system Description described in this procedure. he test setup is calibrated using an open/short to minimize frequency response and phasing errors. hen the detector under test (DU ) is connected to the of the test port...

  • Page 33: Procedure

    Shielded Open Part Number 85032-60001 Short Agilent 11512A Adapter ype-N (m) to 3.5 mm (f) Part Number 1250-1744 Additional Equipment Required for 85037A Option 001 Directional Bridge 85027A Calibrated Open/Short Part Number 85021-60001 Adapter ype-N (m) to 3.5 mm (f)
  • Page 34 Connect the open to the of the bridge. test port Select STORE OPEN Remove the open. he CR will display: HORT/OPEN CAL AVED IN CH1 MEM Press Function DISPLAY 5 Select MEAS-MEM 4. On the 8757D: Connect the detector under test to the of the bridge.

  • Page 35: Frequency Response At A Nominal 10 Dbm

    Frequency Response at a Nominal 10 dBm he frequency response of the 85037A/B detector is speci ed as Description the maximum deviation from a constant input signal of 10 dBm, as measured over the speci ed frequency range. o simplify the measurement procedure, frequency response is measured with a nominal 10 dBm signal applied.

  • Page 36: Procedure

    Power Meter 436A/437B/438A Calibrated Sensor 8481A 10 dB Attenuator 8491B Option 010 Crystal Detector 8474B Additional Equipment Required for Agilent 85037A Option 001 Power Splitter 11667A Opt 002 Power Meter 436A/437B/438A Calibrated Sensor 8481A Option 001 10 dB Attenuator 8492A Option 010...

  • Page 37: Measuring The Source

    Press Instrument State SYSTEM 5 Select MODE DC 4. On the source: Press CW 5 50 5 MHz 5 Connect the power meter/sensor to the output of the splitter. Press Ext Det MORE Coupling actor ALC 5 0 5 dB 5 Press and, if necessary, adjust the POWER LEVEL 5...

  • Page 38: Computing The Maximum Error

    10. Connect the detector to the power splitter. On the 8757D: Press Function to turn the cursor on. CURSOR 5 11. On the source: Press and enter the rst test frequency. Remember to use CW 5 only the test frequencies used in steps 5 through 7. 12.
  • Page 39 Figure 4-3. Frequency Response Graph Table 4-3. Worksheet Recommended Test Frequencies Frequency Measured Power Source Power Meas Power minus in GHz (dBm) (dBm) Source Power (dB) 0.01 0.04 0.10 26.5 Performance Tests 4-9...

  • Page 40: Dynamic Power Accuracy

    Dynamic Power Accuracy he dynamic power accuracy of the 85037A/B is dependent upon the Description raw (uncorrected) response of the detector, the correction routine of the 8757D analyzer, and the accuracy of the 8757D Option 002 calibrator. he accuracy of the calibrator is assumed to be within speci cations.

  • Page 41: First Alternate Dynamic Power Accuracy

    13. Verify the noise oor in AC mode. Press: AVG ON AVG 5 CURSOR 5 and record the average noise oor as displayed by the cursor reading. 14. Press MODE DC PRESET 5 SYSTEM 5 15. Repeat steps 6 through 12 for DC mode. he detector should be rezeroed between the 30 and 40 dBm steps.

  • Page 42: Second Alternate Dynamic Power Accuracy

    Second Alternate Dynamic Power Accuracy Description Figure 4-6. econd Alternate Dynamic Power Accuracy Test etup his setup is for performing independent veri cation of dynamic accuracy in 10 dB increments up to +20 dBm in DC mode. Table 4-4. Additional Equipment Function Generator Agilent 8116A 50 MHz Bandpass Filter...
  • Page 43 Table 4-5. Test Record for 85037A est Facility Report Number Date Customer ested by Model Ambient temperature Serial Number Relative humidity Options Special Notes Performance Tests 4-13...
  • Page 44 Table 4-5. Test Record for 85037A (2 of 3) Model Report Number Date Test Equipment Used Model Number Trace Number Cal Due Date 4-14 Performance Tests...
  • Page 45 Table 4-5. Test Record for 85037A (3 of 3) Serial Number: Report Number: Date: Test Measured Measurement Description Speci cation Results Uncertainty Return Loss at a Nominal 10 dBm 0.01 to 0.04 GHz 10 dB 1.0 dB 0.04 to 18 GHz 20 dB 2.4 dB...
  • Page 46 4-16 Performance Tests...
  • Page 47 Table 4-6. Test Record for 85037A Option 001 est Facility Report Number Date Customer ested by Model Ambient temperature Serial Number Relative humidity Options Special Notes Performance Tests 4-17...
  • Page 48 Table 4-6. Test Record for 85037A Option 001 (2 of 3) Model Report Number Date Test Equipment Used Model Number Trace Number Cal Due Date 4-18 Performance Tests...
  • Page 49 Table 4-6. Test Record for 85037A Option 001 (3 of 3) Serial Number: Report Number: Date: Test Measured Measurement Description Speci cation Results Uncertainty Return Loss at a Nominal 10 dBm 0.01 to 0.04 GHz 10 dB .7 dB 0.04 to 18 GHz 20 dB 1.4 dB...
  • Page 50 4-20 Performance Tests...
  • Page 51 Table 4-7. Test Record for 85037B est Facility Report Number Date Customer ested by Model Ambient temperature Serial Number Relative humidity Options Special Notes Performance Tests 4-21...
  • Page 52 Table 4-7. Test Record for 85037B (2 of 3) Model Report Number Date Test Equipment Used Model Number Trace Number Cal Due Date 4-22 Performance Tests...
  • Page 53 Table 4-7. Test Record for 85037B (3 of 3) Serial Number: Report Number: Date: Test Measured Measurement Description Speci cation Results Uncertainty Return Loss at a Nominal 10 dBm 0.01 to 0.04 GHz 10 dB 0.7 dB 0.04 to 18 GHz 20 dB 1.4 dB 18 GHz to 26.5 GHz...

  • Page 55: Adjustments

    Adjustments Introduction wo adjustments can be performed on the 85037A/B. 1. coarse zero adjustment 2. feedthrough nulling adjustment Normally these two adjustments do not need to be performed. hey should only be performed if the zeroing routine fails. Before attempting any adjustments: urn on all equipment and allow a minimum of 30 minutes warmup time.

  • Page 56: Coarse Zero Adjustment

    Coarse Zero Adjustment he coarse zero adjustment centers the detector's DC preamp input Description o set voltage within the built-in automatic zero routine's range. his is accomplished by adjusting for the lowest overall indication of noise on the 8757D. When the level is minimized, it indicates that the range has been properly centered.

  • Page 57: Feedthrough Nulling Adjustment

    Figure 5-2. Coarse Zero Adjustment Feedthrough Nulling Adjustment Description he feedthrough nulling is adjusted for best DC accuracy below 45 dBm. his is accomplished by adjusting for the highest overall indication of noise on the 8757D. When the level of noise is maximized, it indicates that the feedthrough is nulled.
  • Page 58 10. Press . he display DC DET ZERO MANUAL CAL 5 indicates If you have connected :REMOVE RF FROM DC DETECTOR . the detector to an RF output, disconnect it. 11. Press CONT When the routine is complete the display indicates: MANUAL ZERO COMPLE ED.

  • Page 59: Replaceable Parts

    Replaceable Parts Introduction his section provides replaceable parts and ordering information. rdering Parts o order a part listed in the replaceable parts able 6-2, quote the Agilent part number, indicate the quantity required and address the order to your nearest Agilent oce. Replaceable Parts 6-1...
  • Page 60 o request information on a part that is not listed in the replaceable parts table, include the instrument model number and a description of the part and its function. Address the inquiry to the nearest Agilent oce. Figure 6-1. Detectors and Cable Marker Kit Table 6-1.
  • Page 61 Connector Gage Kits ype-N 85054-80011 7 mm 85050-80012 3.5 mm 11752-60106 Collet Extractor ool For 85037A Option 001 5060-0370 Adapters ype-N (f) to BNC (m) 1250-1534 ype-N (m) to ype-N (m) 1250-1475 3.5 mm (f) to 3.5 mm (f) 1250-1749...
  • Page 62 Figure 6-2. Module Exchange Program 6-4 Replaceable Parts...
  • Page 63 By internet, phone, or fax, get assistance with all your test & measurement needs. Table 6-3. Contacting Agilent www.agilent.com/find/assist Online Assistance: United States Japan New Zealand (tel) 1 800 452 4844 (tel) (81) 426 56 7832 (tel) 0 800 738 378 (fax) (81) 426 56 7840 (fax) 64 4 495 8950 Canada...
  • Page 65 If the detector fails electrically, order an exchange detector: 1. See the Replaceable parts, able 6-2, for the part number that matches the model that you are replacing: 85037A 85037A Option 001 or 85037B. 2. Follow \ he Module Exchange Program" instructions in Figure 6-2.
  • Page 66 Repair Replacing the Detector 1. Remove the plastic covers from the existing detector. (See \Removing the Covers.") 2. Install the covers on the replacement detector. 3. Perform an operator's check. (See \Operator's Check" in Chapter 3.) 4. If the replacement is a restored exchange detector, return the defective detector using the packing material supplied.
  • Page 67 Repair Replacing the able 1. Remove the plastic covers from the detector. (See \Removing the Covers.") Assembly (W1) 2. Remove the two screws at the cable end of the metal housing. 3. Slide the metal housing away from the RF connector, completely exposing the printed circuit (PC) assembly.
  • Page 68 Repair Figure 7-2. Cable Connections ervice...
  • Page 69 aring for onnectors his appendix provides a brief introduction to the fundamentals of proper connector care, as important to good measurements as proper instrument calibration and adjustment. his appendix is intended to provide basic information. A damaged connector can destroy any connector attached to it. Remember Basic connector care comprises three parts: 1.
  • Page 70 Mechanical Inspection Because coaxial connector mechanical tolerances can be very precise (on the order of a few hundredths of microinches), even a perfectly clean, unused connector can cause trouble if it is mechanically out of speci cation. Use a connector gage to mechanically inspect coaxial connectors.
  • Page 71 Index AC detection, 1-2, 3-1 adjustments, 5-1 coarse zero adjustment, 5-1{2 feedthrough nulling adjustment, 5-1{2 autozero, 4-7 bridge directivity, 4-2 source match, 4-2 cable lead identi cation, 2-3 replacing, 7-3 cable assembly, 7-3 characterizing the detector, 3-7 characterizing the source, 4-7 cleaning connectors, A-1 coarse zero adjustment, 5-1 computing the maximum error, 4-8...
  • Page 72 electrical performance, 4-1 electrostatic discharge (ESD), 2-2 cautions, 3-1 equipment, 4-6 exchange credit, 7-1 feedthrough nulling adjustment, 5-1 oor mat use, 2-2 frequency response, 4-5 correction constants, 3-3 correction factors, 3-3 gaging, 2-4 heel strap use, 2-2 initial inspection, 2-1 installation, 2-1 use, 2-2 measurement errors...
  • Page 73 re ection measurements, 1-2 removing covers, 7-2 repairable parts, 7-1 replaceable parts, 6-1 replacing cable, 7-3 detector, 7-2 return loss, 4-3 test description, 4-2 safety considerations, 2-1 service, 7-1 returning detector for service, 2-7 setup AC detection mode, 3-4{6 DC detection mode, 3-4{5 static-safe practices, 2-2 workstation, 2-2...

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85037b

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