Agilent Technologies E4418B Service Manual
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Agilent Technologies E4418B Service Manual

Power meters
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See also: Configuration Manual , User Manual
Errata
This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett-Packard's former test
and measurement, semiconductor products and chemical analysis businesses are now part of Agilent
Technologies. To reduce potential confusion, the only change to product numbers and names has been in the
company name prefix: where a product number/name was HP XXXX the current name/number is now Agilent
XXXX. For example, model number HP8648 is now model number Agilent 8648.
Ce manuel peut contenir des références à <<HP>> ou <<Hewlett-Packard.>> Veuillez noter que les produits de
test et mesure, de semi-conducteur et d'analyse chimique qui avaient fait partie de la société Hewlett-Packard
sont maintenent une partie de la société Agilent Technologies. Pour reduire la confusion potentielle, le seul
changement aux noms de reference a été dans le préfixe de nom de société : là où un nom de référence était HP
XXXX, le nouveau nom de référence est maintenant Agilent XXXX. Par example, le HP 8648 s'appelle
maintenent Agilent 8648.
Diese Gebrauchsanweiseung kann Bezug nehmen auf die Namen HP oder Hewlett-Packard. Bitte beachten Sie,
dass ehemalige Betriebsbereiche von Hewlett-Packard wie HP-Halbleiterprodukte, HP-chemische Analysen
oder HP-Test- und Messwesen nun zu der Firma Agilent Technology gehören. Um Verwirrung zu vermeiden
wurde lediglich bei Produktname und - Nummer der vo laufende Firmenname geändert: Produkte mit dem
Namen/Nummer HP XXXX lauten nun mehr Agilent XXXX. Z.B, das Modell HP 8648 heißt nun Agilent 8648.
Questo manuale potrebbe contenere riferimenti ad HP o Hewlett-Packard. Si noti che le attività precedentemente
gestite da Hewlett-Packard nel campo di Test & Misura, Semiconduttori, ed Analisi Chimica sono ora diventate
parte di Agilent Technologies. Al fine di ridurre il rischio di confusione, l'unica modifica effettuata sui numeri di
prodotto e sui nomi ha riguardato il prefisso con il nome dell'azienda : dove precedentemente compariva "HP
XXXX" compare ora "Agilent XXXX". Ad esempio: il modello HP8648 è ora indicato come Agilent 8648.
Este manual puede hacer referencias a HP o Hewlett Packard. Las organizaciones de Prueba y Medición (Test
and Measurement), Semiconductores (Semiconductor Products) y Análisis Químico (Chemical Analysis) que
pertenecían a Hewlett Packard, ahora forman parte de Agilent Technologies. Para reducir una potencial
confusión, el único cambio en el número de producto y nombre, es el prefijo de la compañía: Si el producto solía
ser HP XXXX, ahora pasa a ser Agilent XXXX. Por ejemplo, el modelo HP8648 es ahora Agilent 8648.
Document Part Number 5971-2668
Printed in the UK September 2004
A

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  • Page 1 Hewlett-Packard nel campo di Test & Misura, Semiconduttori, ed Analisi Chimica sono ora diventate parte di Agilent Technologies. Al fine di ridurre il rischio di confusione, l'unica modifica effettuata sui numeri di prodotto e sui nomi ha riguardato il prefisso con il nome dell'azienda : dove precedentemente compariva "HP XXXX"...
  • Page 2 マニュアル・チェンジ 変更 本文中の「HP（YHP）」、または「(横河)ヒューレット・パッカード株式会社」とい う語句を、「Agilent」、または「アジレント・テクノロジー株式会社」と変更して ください。 ヒューレット・パッカード社の電子計測、半導体製品、化学分析ビジネス部門は分 離独立し、アジレント・テクノロジー社となりました。 社名変更に伴うお客様の混乱を避けるため、製品番号の接頭部のみ変更しておりま す。 （例: 旧製品名 HP 4294A は、現在 Agilent 4294A として販売いたしておりま す。）...
  • Page 3 Service Guide Agilent Technologies E4418B/E4419B Power Meters Agilent Technologies Part no. E4418-90059 Revision C September 2003...
  • Page 4 © Copyright 1998, 2003Agilent Technologies All rights reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Printed in the UK. Agilent E4418B/E4419B Service Guide...
  • Page 5 Agilent Technologies. Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration facility,...
  • Page 6 Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY. Agilent E4418B/E4419B Service Guide...
  • Page 7 To prevent electrical shock, do not remove covers. For continued protection against fire hazard, replace the line fuse(s) only with fuses of the same type and rating (for example, normal blow, time delay, etc.). The use of other fuses or material is prohibited. Agilent E4418B/E4419B Service Guide...

  • Page 8: General Safety Considerations

    This terminal is for use where the earthing cannot be assured. At least an 18AWG earthing conductor should be used in such an instance, to ground the instrument to an assured earth terminal. Agilent E4418B/E4419B Service Guide...
  • Page 9 The product is suitable for indoor use only, when this carry case is not fitted. Installation Instructions To avoid unnecessary over-temperature conditions, while this carry case is fitted do not apply an ac mains supply voltage, only operate your power meter from the battery pack. Agilent E4418B/E4419B Service Guide...
  • Page 10 List of Related Publications List of Related Publications The Agilent E4418B and Agilent E4419B User’s Guides are also available in the following languages: • English Language User’s Guide - Standard • German Language User’s Guide - Option ABD • Spanish Language User’s Guide - Option ABE •...
  • Page 11 Sales and Service Offices Sales and Service Offices For more information about Agilent Technologies test and measurement products, applications, services, and for a current sales office listing, visit our web site: http://www.agilent.com You can also contact one of the following centers and ask for a test and measurement sales representative.
  • Page 12 In any correspondence or telephone conversations, refer to the power sensor by its model number and full serial number. With this information, the Agilent Technologies representative can quickly determine whether your unit is still within its warranty period. Agilent E4418B/E4419B Service Guide...
  • Page 13 Seal the shipping container securely with strong nylon adhesive tape. Mark the shipping container “FRAGILE, HANDLE WITH CARE” to ensure careful handling. Retain copies of all shipping papers. Agilent E4418B/E4419B Service Guide...
  • Page 14 This chapter contains troubleshooting flow charts designed to isolate faults in the Rmt I/O, GP-IB and RS232/422 interface ports. Appendix A: “Measurement Uncertainty Analysis – Instrument Accuracy Test” Appendix B: “Measurement Uncertainty Analysis – Power Reference Level Test” Agilent E4418B/E4419B Service Guide...

  • Page 15: Table Of Contents

    Non-Volatile Memory ............. 1-17 Performance Tests ................1 Introduction................... 2-2 Equipment Required .............. 2-3 Performance Test Record ............2-4 Performance Tests ..............2-4 Calibration Cycle ..............2-4 Test Procedures ..............2-4 Zero Test..................2-5 Specification................2-5 Description................2-5 Agilent E4418B/E4419B Service Guide Contents-1...
  • Page 16 Performance Test Record.............. 2-30 Adjustments..................1 Introduction................... 3-2 Safety Considerations ............3-2 Equipment Required .............. 3-3 Post-Repair Adjustments ............3-3 Power Reference Oscillator Frequency Adjustment ....3-4 Description................3-4 Equipment ................3-4 Procedure ................3-4 Contents-2 Agilent E4418B/E4419B Service Guide...
  • Page 17 Replacing the Rear Panel Power Sensor Cable Assemblies (Options 002 and 003) ............5-19 Replacing the Rear Panel Power Reference Cable Assembly (Option 003) ................5-21 Replacing the Rear Panel Recorder Output Cable Assembly5-22 Replacing The Chassis Assembly .......... 5-23 Agilent E4418B/E4419B Service Guide Contents-3...
  • Page 18 Voltage Measurements Uncertainty ........B-4 Mismatch ................B-5 Calibration factor ..............B-7 Sensor Calibration Factor Drift..........B-7 Resistance ................B-8 Repeatability................B-8 Sensitivity Coefficients (Ci) ........... B-10 Combined Standard Uncertainty (uc(y)) ....... B-12 Expanded Uncertainty ............B-12 Contents-4 Agilent E4418B/E4419B Service Guide...

  • Page 19: Specifications

    Specifications...

  • Page 20: Introduction

    These characteristics are shown in italics or denoted as “typical”, “nominal” or “approximate”. For information on measurement uncertainty calculations, refer to Agilent Application Note 64-1A, “Fundamentals of RF and Microwave Power Measurements”, Literature Number 5965-6630. Agilent E4418B/E4419B Service Guide...

  • Page 21: Power Meter Specifications

    Display Resolution Selectable resolution of: 1.0, 0.1, 0.01 and 0.001 dB in logarithmic mode, or 1, 2, 3 and 4 significant digits in linear mode Default Resolution 0.01 dB in logarithmic mode 3 digits in linear mode Agilent E4418B/E4419B Service Guide...

  • Page 22: Accuracy

    ±30 pW Agilent R8486D ±50 nW Agilent Q8486A ±30 pW Agilent Q8486D ±200 nW Agilent V8486A ±200 nW Agilent W8486A ±50 nW Agilent 8487A ±20 pW Agilent 8487D ±50 pW Agilent E4412A ±50 pW Agilent E4413A Agilent E4418B/E4419B Service Guide...

  • Page 23: Mw Power Reference

    Recognition Arrangement. Further information is available from the Bureau International des Poids et Mesures, at http://www.bipm.fr/ 2. This SWR specification is only warranted for the E4418B and the E4419B Power Meters with serial prefix GB4331xxxx and above. Prior to this prefix the values shown are supplemental characteristics.

  • Page 24: Power Meter Supplemental Characteristics

    40 readings/second • Fast: 200 readings/second, for Agilent E-series power sensors only Maximum measurement speed is obtained using binary output in free run trigger mode. Zero Drift of Sensors Power sensor dependent (refer to Table 1-3). Agilent E4418B/E4419B Service Guide...

  • Page 25: Measurement Noise

    (<45 pW x 2.75) = <124 pW Table 1-2: Noise Multiplier Number of 1024 Averages Noise Multiplier 3.89 2.75 1.94 0.85 0.61 0.49 0.34 0.24 0.17 (Normal Mode) Noise Multiplier 3.25 1.63 0.72 0.57 0.41 0.29 (x2 mode) Agilent E4418B/E4419B Service Guide...
  • Page 26 1 minute interval and 2 standard deviations. For Agilent E-series power sensors the measurement noise is measured within the low range. Refer to the relevant power sensor manual for further information. Agilent E4418B/E4419B Service Guide...

  • Page 27: Settling Time

    10 dB 10 dB 10 dB 10 dB 10 dB 10 dB 6.6 s 3.5 s 10 dB 10 dB 10 dB 10 dB 10 dB 10 dB Minimum dBm Minimum dBm Minimum dBm Minimum dBm Agilent E4418B/E4419B Service Guide...
  • Page 28 For Agilent E-series power sensors In FAST mode, within the range -50 dBm to +17 dBm, for a 10 dB decreasing power step, the settling time is 10 ms for the Agilent E4418B and 20 ms for the Agilent E4419B When a decreasing power step crosses the power sensor’s auto-range...
  • Page 29 Settling Dynamic Dynamic Times Times Range Range 120 ms 70 ms 10 dB 10 dB 400 ms 210 ms 10 dB 10 dB 6.5 s 3.4 s 10 dB 10 dB Minimum dBm Minimum dBm Agilent E4418B/E4419B Service Guide 1-11...

  • Page 30: Power Sensor Specifications

    This parameter is also known as short term stability and is specified as the change in the power meter indication over a short time interval (usually one minute) for a constant input power at a constant temperature. 1-12 Agilent E4418B/E4419B Service Guide...

  • Page 31: Battery Option 001 Operational Characteristics

    1 hour of operation with the LED backlight OFF. Power meter is operational whilst charging. Service Life ° To 70% of initial capacity at 25 C: approximately 450 charge/discharge cycles. Chemistry Nickel Metal Hydride. Weight 1 kg. Agilent E4418B/E4419B Service Guide 1-13...

  • Page 32: General Characteristics

    Binding post, accepts 4 mm plug or bare-wire connection Line Power • Input Voltage Range: 85 to 264 Vac, automatic selection • Input Frequency Range: 50 to 440 Hz • Power Requirement: approximately 50 VA (14 Watts) 1-14 Agilent E4418B/E4419B Service Guide...

  • Page 33: Environmental Characteristics

    95% at 40ºC (non-condensing) Minimum Humidity 15% at 40ºC (non-condensing) Maximum Altitude 3,000 meters (9,840 feet) Storage Conditions Storage Temperature -20ºC to +70ºC Non-Operating Maximum Humidity 90% at 65ºC (non-condensing) Non-Operating Maximum Altitude 15,240 meters (50,000 feet) Agilent E4418B/E4419B Service Guide 1-15...

  • Page 34: General

    212.6 mm W x 88.5 mm H x 348.3 mm D (8.5 in x 3.5 in x 13.7 in) Weight Agilent E4418B, 4.0 kg (8.8 lb) - 5.0 kg (11.0 lb) with option 001 Agilent E4419B, 4.1 kg (9.0 lb) - 5.1 kg (11.2 lb) with option 001 Shipping Agilent E4418B, 7.9 kg (17.4 lb) - 8.9 kg (19.6 lb) with option 001...

  • Page 35: Remote Programming

    GP-IB interface operates to IEEE 488.2. RS-232 and RS-422 interfaces are supplied as standard. Command Language SCPI standard interface commands. Agilent E4418B is HP 437B code compatible. Agilent E4419B is HP 438A code compatible Agilent E4418B/E4419B GP-IB Compatibility SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP1, DC1, DT1, C0...
  • Page 36 Specifications General 1-18 Agilent E4418B/E4419B Service Guide...

  • Page 37: Performance Tests

    Performance Tests...

  • Page 38: Introduction

    The line voltage for the power meter must be 85 to 264 Vac and the line frequency must be 50 to 440 Hz. c. The ambient temperature must be 0 to 55 Agilent E4418B/E4419B Service Guide...

  • Page 39: Equipment Required

    Agilent 8478B Opt H01 Power Sensor Agilent E-series power sensor 30 dB Attenuator Agilent 11708A Agilent 8491A Option 030 Power Sensor Agilent 11730A P and A Cable Agilent E9288A 1. P = Performance Tests, A = Adjustments Agilent E4418B/E4419B Service Guide...

  • Page 40: Performance Test Record

    Equipment settings, other than those for the power meter, are stated in general terms. It is assumed that the person will select the proper cables, adapters, and probes required for test setups illustrated in this chapter. Agilent E4418B/E4419B Service Guide...

  • Page 41: Test Setup

    Equipment Range Calibrator ........Agilent 11683A Power Sensor Cable ......Agilent 11730A Test Setup Power Meter Range Calibrator CHANNEL A POWER METER Agilent 11730A Figure 2-1: Zero Test Setup Agilent E4418B/E4419B Service Guide...

  • Page 42: Procedure

    The following procedure should be performed for the Zero Test. Note The procedure details the key presses required on the Agilent E4418B. For the Agilent E4419B the equivalent key presses should be performed on both channels. 1. Connect the equipment as shown in Figure 2-1.

  • Page 43: Instrument Accuracy Test

    30uW and below, as it uses a standard 11683A Range Calibrator. As such, this test procedure should be used for indication only. Equipment Range Calibrator ........Agilent 11683A Power Sensor Cable....... Agilent 11730A Agilent E4418B/E4419B Service Guide...

  • Page 44: Test Setup

    Test. Note The procedure details the key presses required on the Agilent E4418B. For the Agilent E4419B the equivalent key presses should be performed on both channels. 1. Connect the equipment as shown in Figure 2-2. 2. Switch the power meter on.
  • Page 45 11. Set the range calibrator’s RANGE switch to the positions shown in Table 2-3 on page 2-10. For each setting, verify that the power meter’s reading is within the limits shown. Agilent E4418B/E4419B Service Guide...
  • Page 46 3.156 mW, 10.03 mW, 31.78 mW, and 101.3 mW respectively. Note It is not necessary to check instrument accuracy in dBm. The power meter uses the same internal circuitry to measure power and mathematically converts watts to dBm. 2-10 Agilent E4418B/E4419B Service Guide...

  • Page 47: Test Procedure 2

    Range Calibrator: Agilent 11683A Option H01 • Power Sensor Cable: Agilent 11730A • DC Range Calibrator: Datron 4000A Test Setup DC Calibrator Power Meter CHANNEL A Range Power sensor cable Calibrator Figure 2-3: Instrument Accuracy (Average Path) Test Setup Agilent E4418B/E4419B Service Guide 2-11...

  • Page 48: Procedure

    Test. The procedure details the key presses required on the Note Agilent E4418B. For the Agilent E4419B the equivalent key presses should be performed on both channels. 1. Connect the equipment as shown in Figure 2-3. 2. Unplug the range calibrator's power cord. Due to a ground loop design problem with the 11683A option H01 range calibrator, it will not operate properly unless ground loops are eliminated.
  • Page 49 Verify that the display reads 0 ±0.05 µW. 12. Set the DC calibrator output to 144.93mV, and set the output switch to '+'. 13. Press to calibrate the power meter. Agilent E4418B/E4419B Service Guide 2-13...
  • Page 50 10mW 1.6 uW 9.954mW 10.046mW 4.6872V 31.6228mW 4.8 uW 31.477mW 31.769mW 15.588V 100mW 18.5 uW 99.54mW 100.46mW Note The test limits shown in this table do not take into account the corresponding measurement uncertainty values. 2-14 Agilent E4418B/E4419B Service Guide...

  • Page 51: Power Reference Level Test

    For example, if a test line limit of 1 mW ±0.2% was chosen while maintaining a system measurement uncertainty of ±0.3%, the overall accuracy of the test setup for the 1 mW power output becomes 0.3% + 0.2%, giving a setting accuracy of 0.5%. Agilent E4418B/E4419B Service Guide 2-15...
  • Page 52 • R is the resistance of the mount resistor in the Agilent 432A power meter. For further information refer to Appendix A. • Calibration Factor is the value of the thermistor mount at 50 MHz 2-16 Agilent E4418B/E4419B Service Guide...

  • Page 53: Equipment

    Use the following procedure to perform the power reference level test: Note The procedure details the key presses required on the Agilent E4418B. For the Agilent E4419B the equivalent key presses should be performed on both channels. 1. Set the DVM to measure resistance:...
  • Page 54 14.Calculate the Power Reference Oscillator power using equation 2-4. 15.Verify that P is within the limits shown in Table 2-5 and record the meas reading in the table. Table 2-5: Power Reference Level Test Result Actual Result 0.999 mW 1.001 mW ________________ 2-18 Agilent E4418B/E4419B Service Guide...

  • Page 55: Agilent E-Series Power Sensor Interface Test

    If the download fails, a warning message and error flag are displayed on the front panel. Also, SCPI error message “-310, System Error” is generated. 3. For the Agilent E4419B repeat these steps for Channel B. Agilent E4418B/E4419B Service Guide 2-19...

  • Page 56: Agilent E-Series Power Sensor Functional Test

    To complete the Functional Test the following procedure should be performed. Note The procedure details the key presses required on the Agilent E4418B. For the Agilent E4419B the equivalent key presses should be performed on both channels. 1. Connect the equipment as shown in Figure 2-5. Power Meter...
  • Page 57 10 seconds for the wait symbol to disappear. Verify that the display reads 0 ±50 pW. 4. Press to calibrate the power meter. 5. Turn the power reference on by pressing Zero on the Agilent E4418B. Power Ref Off On Zero on the Power Ref Off On More Agilent E4419B.
  • Page 58 Table 2-6: Functional Test Result Channel B Channel A Overload Error Test Overload Error (Agilent E4419B Only) Low Range, 30 dB pad Upper Range, 30 dB pad Low Range, no pad High Range, no pad 2-22 Agilent E4418B/E4419B Service Guide...

  • Page 59: Output Standing Wave Ratio (Swr) Test

    1. For instruments with the 50MHz 1mW output (power ref) connector mounted on the front panel. 2. For instruments with the 50MHz 1mW output (power ref) connector mounted on the rear panel. This applies to models E4418B and E4419B with option 003 fitted. Description...
  • Page 60 120 . However an approximate solution using two values of Γ can give adequately accurate results provided the phase angle of the source is within ±40 of 0 ±180 2-24 Agilent E4418B/E4419B Service Guide...

  • Page 61: Equipment

    Connect the DVM between the VRF connector on the rear panel of the Agilent 432A and pin 1 on the thermistor mount end of the sensor cable. Verify that no power is applied to the Agilent 432A. Agilent E4418B/E4419B Service Guide 2-25...
  • Page 62 DVM indicates 200 uV or less. Release the Fine Zero switch and go to step 15. 15.Round off the DVM value to two decimal places. Record this value as • V ___________ 16.Turn the power reference on: System Press Power Ref On More Inputs 2-26 Agilent E4418B/E4419B Service Guide...
  • Page 63 • Repeat steps 15 to 20. Record the new values of V and V comp ___________ ___________ ___________ comp 24.Calculate the power measured from the power reference oscillator using Equation 2-10 and record the value: Equation 2-10 – – comp ----------------------------------------------------------------------------- - Where: • P ___________ Agilent E4418B/E4419B Service Guide 2-27...
  • Page 64 27.Calculate the value of the output SWR using Equation 2-13 and record the value: Equation 2-13: Γ ----------------------- Γ – • Output SWR ___________ 28.Verify that the output SWR is not greater than the maximum value shown in the following table: 2-28 Agilent E4418B/E4419B Service Guide...
  • Page 65 (power ref) connector mounted on the front panel. 2. For instruments with the 50MHz 1mW output (power ref) connector mounted on the rear panel. This applies to models E4418B and E4419B with option 003 fitted. Agilent E4418B/E4419B Service Guide 2-29...

  • Page 66: Zero Test

    Performance Tests Performance Test Record Performance Test Record Model Agilent E4418B/E4419B Power Meter Tested by ___________________________________________ Serial Number _______________________________________ Date _______________ Table 2-8: Performance Test Record Channel A Channel B Test Actual Actual Result Result Result Result −76.40 nW +76.40 nW...
  • Page 67 2. For instruments with the 50MHz 1mW output (power ref) connector mounted on the front panel. 3. For instruments with the 50MHz 1mW output (power ref) connector mounted on the rear panel. This applies to models E4418B and E4419B with option 003 fitted. Agilent E4418B/E4419B Service Guide 2-31...
  • Page 68 Performance Tests Performance Test Record 2-32 Agilent E4418B/E4419B Service Guide...

  • Page 69: Adjustments

    Adjustments...

  • Page 70: Introduction

    Maintenance should be performed only by trained personnel who are aware of the hazards involved. When the maintenance procedure can be performed without power, the power should be removed. Agilent E4418B/E4419B Service Guide...

  • Page 71: Post-Repair Adjustments

    Instrument Accuracy Test. A6 Measurement Assembly Zero Test, Instrument Accuracy Test. W1 or W2 Power Sensor Instrument Accuracy Test, Zero Test. Cable BT1 Lithium Battery Battery Self Test. Power Reference Cable Kits Power Reference Level Test. Agilent E4418B/E4419B Service Guide...

  • Page 72: Specification

    Procedure 1. Ensure that the power meter has been powered on for at least 30 minutes before making any measurements. 2. Connect the equipment as shown in Figure 3-1. Set up the counter to measure frequency. Agilent E4418B/E4419B Service Guide...
  • Page 73 Adjustments Power Reference Oscillator Frequency Adjustment 3. Turn the power reference on by pressing Zero on the Agilent E4418B. Power Ref Off On Zero on the More Power Ref Off On Agilent E4419B. 4. Observe the reading on the frequency counter. If it is 50.0 ±0.5 MHz, no adjustment of the power reference oscillator...

  • Page 74: Power Reference Oscillator Level Adjustment

    Agilent test instruments of known capability. Signal acquisition criteria may vary if alternative test instruments are used. In such cases refer to the manufacturer’s guidelines for further information. Agilent E4418B/E4419B Service Guide...
  • Page 75 Adjustments Power Reference Oscillator Level Adjustment Note The power meter may be returned to the nearest Agilent Technologies office to have the power reference oscillator checked and/or adjusted. Agilent 432A Digital Power Meter Power Meter Power Voltmeter INPUT INPUT comp...

  • Page 76: Equipment

    Procedure The procedure details the key presses required on the Note Agilent E4418B. For the Agilent E4419B the equivalent key presses should be performed on both channels. 1. Set up the DVM to measure resistance. Connect the DVM between the connector on the rear panel of the Agilent 432A and pin 1 on the thermistor mount end of the sensor cable.
  • Page 77 Agilent 432A. The DVM is now set up to measure V which represents the power reference oscillator output level. 13.Calculate the required value of V using equation 2. – ) CalibrationFactor – – comp comp Agilent E4418B/E4419B Service Guide...

  • Page 78: Measurement Uncertainty

    . Refer to Figure 3-4 for the position of A2R90: A2R90 A2L9 A2 Assembly A2J13 Front Panel Figure 3-4: A2R90 Adjustment Location Measurement Uncertainty Refer to Appendix B “Measurement Uncertainty Analysis – Power Reference Level Test” 3-10 Agilent E4418B/E4419B Service Guide...

  • Page 79: Display Brightness And Contrast Adjustment

    Display increase the contrast, or the softkey to decrease the contrast of the display. 2. When the desired display contrast level is obtained, press the Set Contrast softkey, located under the Service softkey menu. Agilent E4418B/E4419B Service Guide 3-11...
  • Page 80 Adjustments Display Brightness and Contrast Adjustment 3-12 Agilent E4418B/E4419B Service Guide...

  • Page 81: Theory Of Operation

    Theory of Operation...

  • Page 82: Introduction

    Theory of Operation Introduction Introduction This chapter describes how each of the power meter’s assemblies operate. A block diagram is included at the end of the chapter giving you an overall view of the power meter’s operation. Agilent E4418B/E4419B Service Guide...

  • Page 83: A1 Power Supply/Battery Charger

    +12 V rechargeable battery module fitted. The ac line fuse is located in the line input module on the power meter’s rear panel (Agilent Part Number 2110-0957). The fuse holder contains a spare fuse as standard on shipment. Agilent E4418B/E4419B Service Guide...

  • Page 84: A2 Processor Assembly

    1 V full scale output with a nominal 1 kΩ output impedance. Circuitry for the keyboard driver includes some damage protection, but it is basically a direct connection from the keypad row and column matrix to the microcontroller’s control lines. Agilent E4418B/E4419B Service Guide...
  • Page 85 The TTL inputs are connected to the processor card via in line resistors located on the interface card and can be used to initiate zero and calibration cycles on the power meter. Agilent E4418B/E4419B Service Guide...
  • Page 86 If the battery fails or drops below 3 V the RAM will lose the following information when power is disconnected from the meter: Unit Serial Number Revision letter of Processor Card Unit Option User defined setups User defined sensor calibration tables Agilent E4418B/E4419B Service Guide...

  • Page 87: A3 Front Panel Assembly

    • the ribbon cable from A2J3 of the processor assembly which controls the LCD display. The power meter self tests contain display tests. These are accessed by System pressing More Service Self Test Individual Inputs Display Agilent E4418B/E4419B Service Guide...

  • Page 88: A4 Comms Assembly

    A2 processor assembly. The comms assembly also provides a filtered path for the single/dual recorder output signal and the TTL input and output signals. It also provides ESD protection for the RS232.422, TTL I/O, and Recorder outputs. Agilent E4418B/E4419B Service Guide...

  • Page 89: A5 Daughter Assembly

    Theory of Operation A5 Daughter Assembly A5 Daughter Assembly The A5 daughter assembly is loaded vertically into the A2 processor assembly. The Agilent E4418B has five connectors on the A5 daughter assembly: • two 6-way connectors route the signal lines between the...

  • Page 90: A6 Measurement Assembly

    Theory of Operation A6 Measurement Assembly A6 Measurement Assembly There is one measurement assembly in the Agilent E4418B and two in the Agilent E4419B. The measurement assembly amplifies and converts the chopped AC signal produced by the power sensor (either Agilent 8480 series power sensors or Agilent E-series power sensors) into a 32 bit digital word.
  • Page 91 All clocks are derived from the 16.67 MHz system clock which is generated on the A2 processor assembly and distributed on the A5 daughter assembly. Agilent E4418B/E4419B Service Guide 4-11...

  • Page 92: A8 Rechargeable Battery Assembly

    35 degrees C. Note:- partially discharging and recharging the battery module will reduce its lifetime. It is advised that periodically the battery assembly should have its charge fully cycled i.e. fully discharged and then fully recharged. 4-12 Agilent E4418B/E4419B Service Guide...
  • Page 93 Theory of Operation A8 Rechargeable Battery Assembly Remove this page and replace with pullout.fm. Agilent E4418B/E4419B Service Guide 4-13...
  • Page 94 Theory of Operation A8 Rechargeable Battery Assembly 4-14 Agilent E4418B/E4419B Service Guide...

  • Page 95: Replaceable Parts

    Replaceable Parts...

  • Page 96: Introduction

    Introduction This chapter contains details of some of the higher level components and assemblies which can be ordered from Agilent Technologies. It also details how to assemble and disassemble the power meter for repair. To order parts contact your local Agilent Technologies Sales and Service Office.

  • Page 97: Assembly Part Numbers

    Power Supply and Charger Assembly 0950-3681 (Option 001) Processor Assembly Kit E4418-60031 Refurbished E4418-69028 A301 Front Panel Assembly for: Agilent E4418B and Agilent E4418B Option 002 E4418-61030 Refurbished E4418-69030 A302 Front Panel Assembly for: Agilent E4418B Option 003 E4418-61031 Refurbished E4418-69031...
  • Page 98 E4418-61027 Agilent E4418/9B Option 001 E4418-61016 Rear Bezel E4418-20008 Instrument Chassis Assembly (Includes E4418-61025 push-fit line module) MP6J1 Push-Fit Line Module E4418-61002 Battery Module Cover E4418-61019 Recorder Output Cable Assy E4418-61015 Sensor Cable Assembly Kit E4418-61036 Agilent E4418B/E4419B Service Guide...

  • Page 99: Power Supply Assembly Types

    Before ordering an A1 Power Supply Assembly, check connector J2 and compare it to Figure 5-1 and Figure 5-2 and select the appropriate model. The J2 connector is found nearest the fan assembly. Figure 5-1: 0950-2649 Power Supply Assembly Figure 5-2: 0950-3681 Power Supply and Charger Assembly Agilent E4418B/E4419B Service Guide...

  • Page 100: Front Panel Connector Repair

    The instrument accuracy test should then be carried out to verify the functionality of the new part. Agilent E4418B/E4419B Service Guide...

  • Page 101: Firmware Upgrades

    Service Offices”, on page -ix for details of your local Service Center. Downloading Firmware Instrument Firmware should be downloaded after the processor board is replaced. Firmware can be accessed by Agilent Technologies Service Centers using the World Wide Web. Agilent E4418B/E4419B Service Guide...

  • Page 102: Assembly And Disassembly Guidelines

    Assembly and Disassembly Guidelines The guidelines in this section describe the removal and replacement of the major assemblies in the Agilent E4418B and Agilent E4419B power meters. Once an assembly has been replaced, refer to “Post-Repair Adjustments”, on page 3-3 to ensure that the correct performance tests and adjustments are carried out.

  • Page 103: Removing The A1 Power Supply Assembly

    The second, a closed loop terminal bonded to the chassis with an M3.5 machine screw (use a 9 lb/in T15 screw driver). All the protective earth wiring can be identified by the insulation color green with a yellow stripe. Agilent E4418B/E4419B Service Guide...

  • Page 104: Removing The A2 Processor Assembly

    After replacing a processor board, the display brightness and contrast must be adjusted. See “Adjustments”, on page 3-1. Note Firmware should be downloaded to the instrument after the processor board is replaced. Refer to “Downloading Firmware”, on page 5-7. 5-10 Agilent E4418B/E4419B Service Guide...

  • Page 105: Removing The A4 Comms Assembly

    Disconnect the Recorder cable for channel A from J23 pins 1,2,3. Disconnect the Recorder cable for channel B from J23 pins 4,5,6. Lift the A4 Comms assembly from the two standoffs and slide it out. Agilent E4418B/E4419B Service Guide 5-11...

  • Page 106: Removing The A5 Daughter Or A6 Measurement Assemblies5-12

    2. Slide connector clamp in direction of arrow 3. Rotate connector clamp in direction of arrow 4. Position sensor flex circuit into connector in direction of arrow 6. Push clamp closed in direction of arrow 5-12 Agilent E4418B/E4419B Service Guide...

  • Page 107: Removing The A7 Fan Assembly

    Remove the A1 power supply assembly as shown on page 5-9. Remove the pins which attach the fan to the chassis. Remove the fan cable connector from the A2 processor assembly to release the fan. Agilent E4418B/E4419B Service Guide 5-13...

  • Page 108: Removing The Power Meter Ram Battery (Bt1)

    The battery should not be subjected to short circuit of the battery terminals or to excessive heat. Do not recharge this battery or dispose of it by burning. Check local country regulatory requirements on the disposal of lithium batteries. 5-14 Agilent E4418B/E4419B Service Guide...

  • Page 109: Removing The A3 Front Panel Assembly

    Note After replacing a front panel assembly, the display brightness and contrast must be adjusted. Refer to Chapter 3 “Adjustments”. Agilent E4418B/E4419B Service Guide 5-15...
  • Page 110 Remove the front panel from the power meter. (Refer to “Removing the A3 Front Panel Assembly”, on page 5-15 for details on removing the front panel.) Replace the power sensor cable assembly(s) using the replacement kit. Front panel sensor retaining clip recess 5-16 Agilent E4418B/E4419B Service Guide...
  • Page 111 Replaceable Parts Assembly and Disassembly Guidelines Agilent E4418B/E4419B Service Guide 5-17...

  • Page 112: Replacing The Front Panel Power Reference Cable Assembly5-18

    Front Panel Assembly”, on page 5-15 for details on removing the front panel.) Replace the power reference output cable assembly using the replacement kit and the torques indicated on the following diagrams. Fold up tab after assembly 25 lb/in 9 lb/in 6 lb/in 5-18 Agilent E4418B/E4419B Service Guide...

  • Page 113: Replacing The Rear Panel Power Sensor Cable Assemblies (Options 002 And 003)

    Replace the power sensor cable assembly(s) using the replacement kits. The inner recess on the power sensor cable is used to locate the circlip when assembling to the rear chassis. Rear panel sensor retaining clip recess Agilent E4418B/E4419B Service Guide 5-19...
  • Page 114 Replaceable Parts Assembly and Disassembly Guidelines 5-20 Agilent E4418B/E4419B Service Guide...

  • Page 115: Replacing The Rear Panel Power Reference Cable Assembly (Option 003)

    (Refer to “Removing the A4 Comms Assembly”, on page 5-11.) Replace the power reference cable assembly using the replacement kit and the torques indicated on the following diagrams. 25 lb/in tie wraps 6 lb/in 9 lb/in Agilent E4418B/E4419B Service Guide 5-21...

  • Page 116: Replacing The Rear Panel Recorder Output Cable Assembly5-22

    Replace the recorder output cable assembly using the replacement kit and the torque indicated on the following diagram. 25 lb/in Note Recorder output A connects to A4 J23 and recorder output B connects to A4 J24. 5-22 Agilent E4418B/E4419B Service Guide...

  • Page 117: Replacing The Chassis Assembly

    WARNING Once re-assembly is complete, the unit must be safety-tested in accordance with local guidelines & procedures. This safety-test may take the form of an Earth Continuity Test, Hi-Pot Test, etc. Agilent E4418B/E4419B Service Guide 5-23...
  • Page 118 Replaceable Parts Assembly and Disassembly Guidelines 5-24 Agilent E4418B/E4419B Service Guide...

  • Page 119: Troubleshooting

    Troubleshooting...

  • Page 120: Introduction

    7. GP-IB controller and cable - required to apply “*RST” command through the rear panel GP-IB connector. Note In the following flowcharts a bold font indicates the label of a soft/hard key the user must select. Agilent E4418B/E4419B Service Guide...
  • Page 121 More Service Self Test Instrument Self Test Self Test Errors? Select Done Using DVM E2373A or equivalent, Investigate Power Investigate set to VDC, monitor Rmt I/O Meter Failure Sensor failure Connector pin 3 wrt pin 8. Agilent E4418B/E4419B Service Guide...
  • Page 122 Rmt I/O connector pin 3. DVM reading DVM reading 450Ω +/- 10% 0.0V+/-0.5V? No Fault found with Upper Window TTL Over Limit A2 Processor Assy A4 Comms Assy detection circuit - check user Defective Defective application/implementation Agilent E4418B/E4419B Service Guide...
  • Page 123 More Service Self Test Instrument Self Test Self Test Errors? Select Done Using DVM E2373A or equivalent, Investigate Power Investigate set to VDC, monitor Rmt I/O Meter Failure Sensor Failure Connector pin 4 wrt pin 8. Agilent E4418B/E4419B Service Guide...
  • Page 124 Rmt I/O connector pin 4. DVM reading DVM reading 450Ω +/- 10% 0.0V+/-0.5V? No Fault found with Upper Window TTL Over Limit A2 Processor Assy A4 Comms Assy detection circuit - check user Defective Defective application/implementation Agilent E4418B/E4419B Service Guide...
  • Page 125 Apply TTL logic 0 pulse to RJ45 connector pin 5 Investigate Power Investigate wrt pin 8. Apply TTL logic 1 pulse to RJ45 connector Meter Failure Sensor Failure pin 6 wrt pin 8. See User’s Guide Ch. 2 for timing. Agilent E4418B/E4419B Service Guide...
  • Page 126 Apply TTL logic 0 pulse to Rmt I/O connector pin 6 wrt pin 8. See User’s Guide chapter 2 for timing. Did Channel B CAL? No fault found with Channel B TTL Input selection. No fault found with Channel A Input Zero/CAL Check user application/implementation. selection. Check user application/implementation. Agilent E4418B/E4419B Service Guide...
  • Page 127 J4 pin 43. Meter reading 470Ω +/− 10% Measure resistance between Rmt I/O connector pin 5 and connector J4 pin 44. Meter reading 470Ω +/− 10% A2 Processor assy defective A4 Comms assy defective Agilent E4418B/E4419B Service Guide...
  • Page 128 RS232 Loop Back Did power Run Test Test Pass? meter reset? Investigate power Test Pass? meter failure A2 Processor assy A4 Comms assy defective defective No fault found with RS232/422 serial interface check user application/ implementation 6-10 Agilent E4418B/E4419B Service Guide...

  • Page 129: Measurement Uncertainty Analysis Instrument Accuracy Test

    Measurement Uncertainty Analysis – Instrument Accuracy Test Appendix A Measurement Uncertainty Analysis – Instrument Accuracy Test Note The Measurement Uncertainty Analysis described in this Appendix uses different test equipment from that listed in this Service Guide. However, the equipment used, and the Measurement Uncertainty results, are similar enough to make the analysis useful.

  • Page 130: Measurement Introduction

    Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction Measurement Introduction In the Instrument Accuracy test the DUT measures power levels output from the test station from –25dBm to +20dBm. A modified 8482A sensor is used to perform this measurement; it has had its thermocouple sensor (RF to DC converter) removed.

  • Page 131: Uncertainties

    Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction Uncertainties Universal Source: No Uncertainties DMM: Yes (Type B) 8482: Extraneous signals, cables connectors and Yes (Type A) 1. There is no uncertainty involved within the 8482A sensor, as a relative power is being measured. Before any measurement is made, an equivalent voltage to 0dBm is applied to the 8482 sensor to allow the power meter calibration.
  • Page 132 Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction Hence: Measurement Accuracy = f(MV , TSE) The Measurement Uncertainty is not calculated from different sensor and power meter combinations, rather it is taken care of in the Customer Limit specification setting.
  • Page 133 Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction Standard Uncertainty u(x Table A-1 shows the standard deviation of the 30 readings from the DUT at various power levels. Table A-1: Standard Uncertainty Results Standard Deviation of 30 Conversion to Linear Units Power Level Readings Standard Uncertainty...
  • Page 134 Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction Worst case error on 0.1V range: Error = ((9ppm x 100mV) + (3ppm x 100mV)) + (6ppm x 100mV) + 5((0.15ppm x 100mV) + 100mV)) = 2.375uV Percentage Error = 0.002375% Voltage Error Distribution Standard Uncertainty...
  • Page 135 Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction Worst case error on 15.8V maximum power setting Error = ((10ppm x 15.8V) + (0.3ppm x 100.0V)) + (0.5ppm x 15.8V) + 5((0.15ppm x 15.8V) + (0.1ppm x 100V)) = 257.75uV Percentage Error = 0.00163% Voltage Error Distribution...

  • Page 136: Sensitivity Coefficients Ci

    Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction By using the DMM Uncertainties calculated previously the worst case voltage and corresponding power errors can be calculated. DMM Error on Worst Case Worst Case Power Setting Applied Volts Range Standard Voltage Error on Power Error on (mW)

  • Page 137: Combined Standard Uncertainty Uc(Y

    0.00095mW 0.00924mW 0.01850mW Expanded Uncertainty ku (y): The Expanded Uncertainty for each power level is given in the table above, using Agilent Technologies’s standard 95% confidence level gives a coverage factor of 2. K = 2 Agilent E4416A/E4417A Service Guide...
  • Page 138 Measurement Uncertainty Analysis – Instrument Accuracy Test Measurement Introduction A-10 Agilent E4416A/E4417A Service Guide...

  • Page 139: Measurement Uncertainty Analysis Power Reference Level Test1

    Measurement Uncertainty Analysis – Power Reference Level Test Appendix B Measurement Uncertainty Analysis – Power Reference Level Test Agilent E4416A/E4417A Service Guide...

  • Page 140: Measurement Introduction

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Measurement Introduction In the Power Reference Level Test, the output from the DUT’s 1mW Power Ref connector is measured. A 432A Power Meter and an 8478B H01 Power Sensor are required for this test. Also the H01 power sensor’s calibration factor uncertainty at 50MHz must be no greater than ±0.2%.
  • Page 141 Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction where, is the reflection coefficient of the source (i.e. the DUT) and P is the reflection coefficient of the 8478B detector. Hence, P meas f V comp V 1 V 0 R CF M s Consider the measurement setup that exists in Figure B-1 POWER 8478B...

  • Page 142: Uncertainty Equation

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction ⁄ ± M s Uncertainty 1 2P s P d The equation above includes the worst-case mismatch magnitude 2P and is in the form where various powers can be multiplied by the equation to find worst-case power levels with respect to mismatch.

  • Page 143: Mismatch

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction A normal distribution is assumed, as the 3458A Manual has not specified the type of distribution used on the measurement. Both V and V values are calculated by subtracting V from V as measured at comp...
  • Page 144 Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Consider the model below: An estimate of the moduli of Pd and Ps are each less than a specified value. Ps and Pd each lie within a circle of radius P. Assuming Pd and Ps have equal probability of lying anywhere within the circle the standard uncertainty of Mismatch becomes ⋅...

  • Page 145: Calibration Factor

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction So u(Ms) from the equation above equals: × 0.0244 0.0244 ± --------------------------------------------------- - u Ms 0.00042 Mismatch Uncertainty U(Ms) worst case × 2P s P d u Ms 0.0012 Calibration factor The calibration factors supplied with the power sensor take into account the performance of the sensor with respect to frequency.

  • Page 146: Resistance

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Resistance The uncertainty of the resistance measurement on the 3458A DMM is given from: Error = (ppm of reading + ppm of range) + (temperature coefficient) + (factory traceability) with: - Conditions: - 1 Year Cal and temperature variance +/- 5°C without ACAL Reference: - 3458A Operating Manual Appendix A For 1kΩ...
  • Page 147 Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Table B-1: Measurement Repeatability Results Measurement ADJUST REF. REF. LEVEL TEST 0.999548951 0.999499495 0.999541333 0.999554257 0.999449078 0.999414037 0.999546994 0.999509401 0.999138526 0.9991726 0.999647055 0.999454911 0.999539391 0.999515949 0.999567191 0.999558795 0.999600963 0.999554633 0.999405584 0.999377721 0.999523392 0.999566084...

  • Page 148: Sensitivity Coefficients (Ci

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Table B-1: Measurement Repeatability Results Measurement ADJUST REF. REF. LEVEL TEST 0.999406 0.999377721 Average 0.999529 0.999504053 5.67E-05 5.01868E-05 1. Measurement 5 was discounted from the calculations as being an extraneous measurement.
  • Page 149 Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Using the above values gives 2 V 1 V 0 – – × --- - Ci V ---------------------------- - 2.129 Ω V comp 4RCFM s comp 2V comp 2V 1 –...

  • Page 150: Combined Standard Uncertainty (Uc(Y

    Measurement Uncertainty Analysis – Power Reference Level Test Measurement Introduction Combined Standard Uncertainty ( c(y)) Table B-2: Combined Standard Uncertainty Source of Probability Symbol Value Divisor Uncertainty Distribution /µW 69.65 µV Two Voltage Normal 2.129x10 V/Ω 0.007 measurements on a 3458A DMM 69.45 µV Two Voltage...
  • Page 151 1-13 firmware upgrades 5-7 chemistry frequency adjustment 3-4 1-13 frequency range 1-14 service life 1-13 specification typical operating time 1-13 frequency, characteristic of power reference 1-5 weight 1-13 front panel assembly 4-7 replacement 5-15 Index-1 Agilent E4418B/E4419B Service Guide...
  • Page 152 1-xi parts 5-2 front panel 5-15 performance test record 2-30 measurement assembly 5-12 performance tests 2-2 power reference cable 5-18 5-21 Agilent E-series power sensor functional power sensor cable 5-16 5-19 test 2-20 power supply Index-2 Agilent E4418B/E4419B Service Guide...
  • Page 153 1-9 single sensor dynamic range, specification 1-3 size of instrument 1-16 specifications 1-2 speed of measurement 1-6 SWR, characteristic of power reference 1-5 telephone numbers of Agilent Technologies 1-ix temperature characteristic 1-15 test equipment 2-3 test record 2-30 troubleshooting equipment...
  • Page 154 Index-4 Agilent E4418B/E4419B Service Guide...

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