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HP 84125C User Manual

Microwave emi measurement test system
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Summary of Contents for HP 84125C

  • Page 1 Agilent Test & Measurement website, www.tm.agilent.com. HP References in this Manual 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. We have made no changes to this manual copy.
  • Page 2 HP 84125C User's Guide Microwave EMI Measurement Test System ABCDE HP Part No. 84125-90010 Printed in USA February 1999...
  • Page 3 Notice The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and tness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
  • Page 4 Certi cation Hewlett-Packard Company certi es that this product met its published speci cations at the time of shipment from the factory. Hewlett-Packard further certi es 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, and to the calibration facilities of other International Standards Organization members.
  • Page 5 Product maintenance agreements and other customer assistance Assistance agreements are available for Hewlett-Packard products. For any assistance, contact your nearest Hewlett-Packard Sales and Service Oce. Compliance This instrument has been designed and tested in accordance with IEC Publication 348, Safety Requirements for Electronic Measuring Apparatus, and has been supplied in a safe condition.

  • Page 6: General Safety Considerations

    General Safety Considerations WARNING No operator serviceable parts inside. Refer servicing to quali ed personnel. To prevent electrical shock, do not remove covers. If this instrument is not used as speci ed, the protection provided by the equipment may be impaired. This instrument must be used in a normal condition (in which all means for protection are intact) only.

  • Page 8: Table Of Contents

    Test Set Components ....Installing the HP 84125C System ... Assembling the Test Mobile Instrument Cart ..
  • Page 9 5. System Interface DLP Softkey Menu ....HP 84125C System Softkey Reference ..NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ....
  • Page 10 Minimum PC Requirements ... . . Setting Up the HP-IB or GPIB Interface ..Setting Up HP-IB Interface for Windows 3.1 ..
  • Page 11 Hewlett-Packard Sales and Service Oces ..A. Amplitude Accuracy Spectrum Analyzer Uncertainties ..HP 84125C Test-Set Uncertainties ..Index Contents-4...
  • Page 12 8-1. Replaceable Parts ....8-2. HP Sales and Service Oces ... . .

  • Page 14: Product Description

    The calibration data is also stored on a 3.5 inch oppy disk during factory calibration of the HP 84125C system and is shipped with each HP 84125C system. The oppy disk contains the amplitude correction factors for the test set (that is, ampli er gain, cable loss, and lter response) and the antenna.

  • Page 15: Measurement Overview

    Measurement Overview The HP 84125C microwave EMI measurement test system may be used for a variety of measurements. To assure the best, most accurate measurements of your product, you should read and review the required product regulations. The following is a brief description of how to use the system to test a product to the FCC Part 15 regulation.

  • Page 16: Speci Cations And Characteristics

    Speci cations and Characteristics This chapter contains speci cations, characteristics, and typical performance for the HP 84125C system. De nition of Terms Speci cations describe warranted performance which is traceable to the National Bureau of Standards (NIST). Characteristics describe non-warranted performance derived during the design phase of the system and is not veri ed on a continuing basis.

  • Page 17: Hp 8564E Spectrum Analyzer Speci Cations And Characteristics

    8.25 to 18 GHz 5.9 GHz 2.3:1 HP 8564E Spectrum Analyzer Speci cations and Characteristics To guarantee the performance of the HP 84125C system, the HP 8564E spectrum analyzer must be operated under the following conditions: Five-minute warmup in ambient conditions...

  • Page 18: Antenna Speci Cations And Characteristics

    The weight includes the 1 to 18 GHz antenna horn. For an HP 84125C, with either the 18 to 26.5 GHz antenna horn or the 26.5 to 40 GHz antenna horn installed, the test-set weight is 7.5 lb or 16.5 kg.

  • Page 19: Hp 84125C System Dimensions

    Figure 2-1. HP 84125C System Dimensions 2-4 Speci cations and Characteristics...

  • Page 20: Typical Sensitivity For An Hp 84125C System

    Typical Sensitivity for an HP 84125C System Note The values displayed by the HP 84125C system are the actual eld strength of the emission (in dB  V/m), corrected for all system gains and losses including the antenna transducer factors.

  • Page 21: Amplitude Accuracy

    HP 84125C system. The following conditions must be met to assure the amplitude accuracy of your system. 1. The HP 84125C system has been warmed up for 30 minutes or more at a stable temperature between 20  C and 30  C.
  • Page 22 Amplitude Accuracy (typical) 1.0 to 2.9 GHz 6.2 dB 2.75 to 6.46 GHz 6.4 dB 6.46 to13.2 GHz 6.5 dB 13.2 18.0 GHz 6.8 dB 18.0 to 22.0 GHz 5.4 dB 22.0 to 26.5 GHz 5.6 dB 26.5 to 40 GHz 5.4 dB Speci cations and Characteristics 2-7...

  • Page 23: Declaration Of Conformity

    Declaration of Conformity Figure 2-5. Declaration of Conformity 2-8 Speci cations and Characteristics...

  • Page 24: System Setup And Functional Tests

    System Setup and Functional Tests System Setup The following procedure will assist you in setting up your HP 84125C system. Initial Inspection Your HP 84125C system is sent to you in three shipping containers. Inspect the shipping containers for damage. Use Table 3-1 to verify that the contents are complete.

  • Page 25: Test Set Components

    Test Set Components Table 3-1. HP 84125C System Accessories Description HP Part Number Comments System Rack Box (largest carton) Testmobile Instrument Cart HP 1182A Shipped assembled except for the handle and casters. The handle and hardware are contained in a carton within the system rack carton.
  • Page 26 Table 3-1. HP 84125C System Accessories (continued) Description HP Part Number Comments Spectrum Analyzer Box (medium-sized carton) Front Cover 5063-0274 Mass Memory Module HP 85620A BNC Cable, 23 cm (9in) HP 10502A 4 mm Hex (Allen) Wrench 8710-1755 Power Cord Not used, appropriate cable is supplied with the system.

  • Page 27: Installing The Hp 84125C System

    Installing the HP 84125C System The following procedure will assist you with installing your HP 84125C system. Assembling the Test Mobile Instrument Cart 1. From the largest carton, carefully remove the cart from its shipping container and the items contained in the space between the drawer and the upper shelf of the cart.

  • Page 28: Spectrum Analyzer Installation

    Figure 3-1. Spectrum Analyzer Installation b. Slide the rubberized bumpers on the back of the analyzer under the folded tabs on the back of the bracket. c. Lower the front of the analyzer into the bracket so that the front lower bumpers t behind the front tabs of the bracket. 4.

  • Page 29: Attaching The Power Module And Power Cords

    Before connecting the system to a power source, make sure that the spectrum analyzer line module is con gured for the proper voltage requirements. Refer to Chapter 9 of HP 8560 E-Series Spectrum Analyzer User's Guide for complete instructions.

  • Page 30: Connecting The Rf Cable Assembly To The Spectrum Analyzer

    Connecting the RF Cable Assembly to the Spectrum Analyzer Refer to Figure 3-2 for the following procedure. Figure 3-2. Front view of the Spectrum Analyzer 1. Use a #15 torx driver and two 4.0 mm X 12.0 mm torx screws to attach the strain-relief support bracket to the spectrum analyzer mounting bracket.

  • Page 31: Strain Relief Installation

    Note Be sure to use the correct adapter when connecting the RF cable assembly to the spectrum analyzer. 2. Connect the RF cable assembly from the test set to the spectrum analyzer INPUT 50 using the 2.4 mm (f) to (f) RF adapter (part number 1250-2188) supplied with the spectrum analyzer.

  • Page 32: Connecting The Dc Ampli Ers To The Rf Cable Assembly

    Connecting the DC Ampli ers to the RF Cable Assembly Refer to Figure 3-4 for the following procedure. Figure 3-4. DC Ampli ers Cable Routing 1. Locate the two DC ampli er cables where they separate from the RF cable assembly. Position the DC ampli er cables so that they loop around the edge of the shelf.

  • Page 33: System Functional Tests

    System Functional Tests The purpose of the system functional tests are to verify that the HP 84125C microwave EMI measurement test system is operating correctly. The test consists of two sections: Test Set Veri cation Displayed Average Noise Level (DANL) Test Set Veri cation Description This test procedure instructs you to perform speci c tests that will verify the functionality and performance of the system.

  • Page 34: Recommended Test Equipment And Accessories

    26.5, 40 HP 84125C download utility disk is generated during factory calibration of the HP 84125C system and is shipped with each system and is speci c to that system. The disk contains amplitude correction factors for the test set and the three available antennas.

  • Page 35: Procedure

    Hewlett-Packard Service Center. To view the test set gain and antenna correction factor data separately, you must use the HP 84125C utility disk provided with the HP 84125C system. The following les can be found on the utility disk: CAUTION The test set gain correction factor les are for viewing purposes only.

  • Page 36: Reference Point Setup

    3. Connect the synthesized sweeper to the input of the spectrum analyzer using the cable and 10 dB xed attenuator. Refer to Figure 3-5. Figure 3-5. Reference Point Setup Preset 4. Press on the spectrum analyzer. 5. Change the spectrum analyzer settings by pressing the following keys: SPAN , 20...

  • Page 37: System Gain Veri Cation

    Figure 3-6. System Gain Veri cation 9. Disconnect the synthesized sweeper cable from the spectrum analyzer RF input (ensure the 10 dB attenuator remains on the end of the cable). 10. Change the spectrum analyzer reference level setting by pressing, AMPLITUDE NNNNNNNNNNNNNNNNNNNNNNN 11.

  • Page 38: Displayed Average Noise Level (Danl) Description

    Refer to Table 3-4. Displayed Average Noise Level (DANL) Description This test measures the displayed average noise level of the HP 84125C microwave EMI measurement test system. The test set is connected to the input of the spectrum analyzer. The DLP is used to set up the initial spectrum analyzer settings and to load the correction factors for the complete test set.

  • Page 39: Part 2, 18 To 40 Ghz

    2.4 mm (m) to K-2.92 (m) 1250-2187 Termination, 50 Connector: APC 3.5 (m) Frequency Range: 1 to 26.5 GHz HP 909D Termination, 50 Connector: 2.4 mm (f) Frequency Range: DC to 50 GHz HP 85138B 3-16 System Setup and Functional Tests...

  • Page 40: Part 2: 18 To 40 Ghz

    Procedure Ensure that the spectrum analyzer meets the conditions listed in \HP 8564E Spectrum Analyzer Speci cations and Characteristics" in Chapter 2. Part 1: 1 to 18 GHz 1. Connect equipment as shown in Figure 3-7. Figure 3-7. DANL Measurement Setup, 1 to 18 GHz 2.
  • Page 41 6. Determine the antenna correction factor at 9.5 GHz for your system by performing the following: a. Insert the 3.5 inch oppy disk provided with the HP 84125C system into a personal computer (PC). b. Open Windows File Manager, select the oppy disk drive (for e3115.txt...

  • Page 42: Danl Measurement Setup, 18 To 40 Ghz

    Part 2: 18 to 40 GHz 1. Connect equipment as shown in Figure 3-8. Figure 3-8. DANL Measurement Setup, 18 to 40 GHz 2. Connect the W4 cable from J1 to the J2 connector. 3. Connect the 50 ohm termination to the J3 connector. 4.
  • Page 43 1. Insert the 3.5 inch oppy disk provided with the HP 84125C system into a personal computer (PC). 2. Open Windows File Manager and select the oppy disk drive (for example, drive A).

  • Page 44: Displayed Average Noise Level

    Table 3-7. Displayed Average Noise Level Frequency Display Line Antenna Calculated Limit Range Amplitude Correction DANL Factor (GHz) (dB) 1 to 18 18 to 26.5 40.3 26.5 to 40 43.5 The antenna correction factor is determined in Part 1, step 6 of the Displayed Average Noise Level Test.

  • Page 46: Test Set Hardware Con Gurations

    This chapter describes how to set up and con gure your test set with the appropriate antenna and lters needed to make measurements over the entire frequency range of the HP 84125C system. When making measurements from 1 to 18 GHz, a high-pass lter can be installed.

  • Page 47: To 18 Ghz Test-Set Con Guration (Top View)

    1. Attach the antenna (HP 11966E) to the front plate. Position the antenna so that the Type N connector on the test set is pointing to the right of the test set as viewed from the front. Use the 1/4 inch at washer, the split lock washer, and the 1/4-20 hex nut supplied in the accessories box, to attach the antenna.
  • Page 48 Position the lter or through cable in the space provided in front of the lter clamp. Push the lter clamp toward the lter while keeping the lter within the recessed area of the antenna mounting plate. When the lter is properly positioned, tighten the clamp thumb screw to secure the lter.

  • Page 49: 18 To 26.5 Ghz Con Guration

    18 to 26.5 GHz Con guration Note If an antenna is already installed, you may need to remove the antenna and any associated cables or lters before installing another antenna. When performing the following antenna installation, only nger tighten connectors keeping all connections loose until the last step. 1.
  • Page 50 3. Reinstall the clamp containing the antenna to the front plate and nger tighten the clamp screws. See Figure 4-3. Make sure that the antenna connector is pointed toward the left of the test set when viewed from the front of the test set. 4.

  • Page 51: 26.5 To 40 Ghz Con Guration

    26.5 to 40 GHz Con guration Note If an antenna is already installed, you may need to remove the antenna and any associated cables or lters before installing another antenna. When performing the following antenna installation, only nger tighten connectors keeping all connections loose until the last step. 1.

  • Page 52: Cable And Connector Care

    Connection Procedure 1. Visually inspect the connectors. 2. If necessary, clean the connectors. Use a 99.5% Isopropyl Alcohol solution (HP part number 8500-5344). 3. Carefully align the connectors. The male connector center pin must slip concentrically into the contact ngers of the female connector.

  • Page 53: Disconnection Procedure

    At this point all you want is a connection in which the outer conductors make gentle contact at all points on both mating surfaces. Very light nger pressure (no more than 2 inch{pounds of torque) is enough. 6. Torque nal connections to 8-inch lbs. Disconnection Procedure 1.

  • Page 54: System Interface

    ltering out the fundamental frequencies. Correction data is used to sum out gains/losses due to the antenna, cables, ampli ers, and lters. In the Log mode, the values displayed by the HP 84125C system are the actual eld strength of the emission (in dB  V/m), corrected for all system gains and losses including the antenna transducers factors.

  • Page 55: Dlp Softkey Menu

    DLP Softkey Menu Figure 5-1. DLP softkey menu 5-2 System Interface...

  • Page 56: Hp 84125C System Softkey Reference

    For your convenience, the top softkey placeholder (that is, top right-hand corner of the screen) shows the frequency range of the correction factors currently loaded into the spectrum analyzer. It is also used to preset the HP 84125C system interface conditions in case PRESET the spectrum analyzer key is pressed or the power is turned o .
  • Page 57 1.5GHz Softkey that loads the correction data and parameters for the 1.5 to 18 GHz test-set con guration. This includes the corresponding to 18GHz test-set amplitude-correction data (that is, the 1.5 GHz high-pass lter, ampli ers, and cables are summed together), antenna correction data, and appropriate spectrum analyzer settings for making an EMI measurement.
  • Page 58 Key Path MODULE 18GHz Softkey that loads the correction data and parameters for the 18 to 26.5 GHz test-set con guration. This includes the corresponding to 26.5 GHz test-set amplitude-correction data (that is, ampli ers and cables are summed together), antenna correction data, and appropriate spectrum analyzer settings for making an EMI measurement.
  • Page 59 ADJUST Softkey that sets the upper limit line value in Logarithmic mode and the Marker Limit value in Linear mode. Use the data entry keys to LIMIT GHz +dBm dB enter a value from 10 to 110 dB  V/m, then press enter the limit value.

  • Page 60: Nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

    In Logarithmic mode, when correction data is loaded and turned on, the letter \W" appears in the lower left-hand side of the spectrum analyzer screen. The appropriate correction data must be loaded for the selected hardware when using the HP 84125C system for valid measurements. Key Path MODULE Only available in Logarithmic mode.

  • Page 61: Nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

    Note The Peak Excursion and Peak Threshold functions are used to de ne what constitutes a peak on a trace. Refer to \Key Function HP 8560 E-Series Spectrum Analyzer User's Descriptions" in the Guide for a complete description of these functions.
  • Page 62 Note The Peak Excursion and Peak Threshold functions are used to de ne what constitutes a peak on a trace. Refer to \Key Function HP 8560 E-Series Spectrum Analyzer User's Descriptions" in the Guide for a complete description of these functions.

  • Page 63: Nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

    SAVE Softkey that saves the amplitude, frequency, and the amplitude scale (that is, logarithmic or linear) using the values determined by the MKR #1 - #9 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN function. These values will be saved in the marker NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN register until the markers are cleared using the function or a new value is stored overwriting the existing value.
  • Page 64 WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW SERVICE Softkey that displays the test set gain measurement values for performance veri cation. These values will be used to complete the System Function tests. Key Path NNNNNNNNNNNNNNNNNNNNNNNNNN MODULE TIMEDATE Softkey that turns on and o the time and date stamp in the upper left-hand corner of the display.

  • Page 66: Making Measurements

    Making Measurements The HP 84125C microwave EMI measurement test system may be used for a variety of measurements. To assure the best, most accurate measurements of your product, you should read and review the required product regulations. The following example describes one method for measuring the intentional radiation of a cellular telephone in accordance with the current FCC, Part 15 regulation.

  • Page 67: Con Guring The Test Set

    Note This procedure describes the FCC requirement. Measurements to other regulatory standards would be similar but should use the limits, measuring distances, and procedures described in those regulations. Even though the measurement is done speci cally for harmonic emissions, any spurious emission from the test device that exceeds the limit also fails the speci cation.

  • Page 68: Setting Up The Hp 8564E Spectrum Analyzer

    Setting Up the HP 8564E Spectrum Analyzer Set up the spectrum analyzer to measure harmonic emissions as follows: NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FREQUENCY 1. Press to set the center frequency to the rst harmonic. 2. Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN to set the center frequency step size of 830 MHz.

  • Page 69: Making A Measurement Using Average Detection

    Ensure that the appropriate printer or plotter is connected and con gured. For more information, refer to HP 8560 E-Series Spectrum Analyzer User's Guide Making a Measurement Using Average Detection When the spectrum analyzer is used in linear mode, video ltering provides the average value of a signal.
  • Page 70 SPAN 3. Press , or a frequency span that will make a calibrated measurement. NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN 4. Press with OFF underlined. 5. Press NNNNNNNNNNNNNNNNNNNNNNN AMPLITUDE and adjust the reference level to bring the signal near the top of the display. 6. Press MODULE NNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN...

  • Page 72: Using The Hp 84125C Utility

    Using the HP 84125C Utility The HP 84125C download utility disk is generated during factory calibration of the HP 84125C system. It is shipped with each system and is speci c to that system. The download utility disk contains the DLP (that is, the system interface) and a Windows based program...

  • Page 73: Personal Computer Requirements

    Any Windows 3.1 compatible mouse or trackball Setting Up the HP-IB or GPIB Interface To use the HP 84125C utility, your personal computer will need a GPIB interface to communicate with the spectrum analyzer. You can use either the National Instruments Corporation's AT-GPIB interface board and NI-488.2 MS-DOS/Windows drivers, or the Hewlett-Packard...

  • Page 74: Software Installation

    Windows 3.1. Software Installation 1. Place the HP/IO Libraries for Instrument Control compact disc (CD) into the CD drive of your computer to load the HP 84231C software. 2. Open Windows File Manager and select the CD ROM drive (for example, drive D).

  • Page 75: Hardware Veri Cation

    3. Turn on the computer to start Windows NT. Software Installation 1. Place the HP/IO Libraries for Instrument control compact disc (CD) into the CD drive of your computer to load the HP 82341C software. 7-4 Using the HP 84125C Utility...

  • Page 76: Hardware Veri Cation (Hp 82341C)

    Setup.exe 4. Select to load the driver. Windows NT 5. In the HP I/O Libraries Installation window, select Install 6. Verify the SICL and VTL le locations then press 7. When the installation is complete, the message \Installation Succeeded" will be displayed. Click Start 8.

  • Page 77: Software Installation

    GPIB board into either the rst or last slot as it is dicult to connect the HP-IB interface cable with the card in either of these locations. Software Installation 1. Insert the NI-488.2 Software for Windows and the AT-GPIB/TNT disk into the disk drive.

  • Page 78: Setting Up At-Gpib/Tnt For Windows 95

    6. When Windows 95 has nished installing the software necessary Next for supporting your hardware, click on to end the installation. When the software prompts you to power down the computer, click Using the HP 84125C Utility 7-7...

  • Page 79: Hardware Installation

    2. Set the Base I/O Address to an unused address in your personal computer. The default Base I/O Address is (hex) 2C0. 3. Set the Interrupt Level (IRQ) to an unused interrupt in your computer. The default Interrupt Level is 11. 7-8 Using the HP 84125C Utility...

  • Page 80: Software Setup

    Windows NT, Diagnostic Test All 2. In the Diagnostic window, click on the button. Exit 3. When the test is complete, click on the button to exit the software diagnostic test. Using the HP 84125C Utility 7-9...

  • Page 81: Installing The Hp 84125C Download Utility On Your Personal Computer

    Computer In the event that the spectrum analyzer memory is inadvertently cleared and the DLP lost, it can be reloaded from the HP 84125C download utility disk via your personal computer. You can also use the download utility to edit or print antenna correction factors. Refer to \Antenna Factors"...

  • Page 82: Edit Menu

    Antenna factors are conversion factors relating eld strength to measured voltage. HP 11964E (EMCO 3115), 1 to 18 GHz HP part number 84125-80008 (EMCO 3160-09), 18 to 26.5 GHz HP part number 84125-80001 (EMCO 3160-10), 26.5 to 40 GHz Antenna Correction Factors Window The Antenna Correction Factors window is used to edit the exiting correction factors for the selected antenna.

  • Page 83: Add Point Button

    GPIB or HP-IB card, and also the address of the spectrum analyzer. Card Text Box The Card text box is used to select the card type for GPIB or HP-IB interface cards. AT-GPIB cards will most likely be set to \0". To verify this setting, use one of the following procedures: Windows 3.1...

  • Page 84: Done Button

    \Setting Up the HP-IB or GPIB Interface" found earlier in this chapter. Device Text Box The Device text box is used to set the HP-IB address of the HP 8564E spectrum analyzer. The spectrum analyzer is preset at PRESET NNNNNNNNNNNNNNNNNNNN the factory to 18.

  • Page 86: Customer Support

    Return the FAX Cover Sheet A FAX sheet is provided at the end of this chapter as a method in which to directly contact the HP EMC support team in the event of a problem. The FAX cover sheet provides the EMC support team with information about your company, the product, and a detailed description about the problem.

  • Page 87: Calibration Information

    Calibration Information Hewlett-Packard recommends that the HP 84125C system be calibrated in 1-year intervals. Return the system to the nearest HP Sales and Service oce listed in Table 8-2. A system calibration should be performed when any of the system individual instruments or components are repaired or replaced.

  • Page 88: Returning The Hp 84125C System For Calibration Or Service

    Use the following steps to package the HP 84125C system for shipment to Hewlett-Packard for calibration or service: 1. If the HP 84125C system is being sent in for repair, include the following information: Any speci c information regarding the nature of the problem.

  • Page 89: Hewlett-Packard Sales And Service OCes

    CAUTION Damage to the HP 84125C system can result from using packaging materials other than those speci ed. Never use styrene pellets in any shape as packaging materials. They do not adequately cushion the instrument or prevent it from shifting in the carton. Styrene pellets cause equipment damage by generating static electricity and by lodging in the fan.
  • Page 90 Table 8-2. HP Sales and Service Oces US Field Operation Headquarters Georgia Hewlett-Packard Company Hewlett-Packard Company 19320 Pruneridge Avenue 2000 South Park Place Cupertino, CA 95014 USA Atlanta, GA 30339 (800) 752-0900 (404) 955-1500 Southern California Illinois Hewlett-Packard Company Hewlett-Packard Company...
  • Page 91 8-6 Customer Support...

  • Page 92: Amplitude Accuracy

    Amplitude Accuracy The amplitude accuracy of the HP 84125C system is a combination of the accuracy of the spectrum analyzer and the accuracy of the test set including the RF cable assembly. In general, the amplitude error is calculated by: [Spectrum Analyzer Uncertainty] + [Test-Set Uncertainty] + [Temperature Drift*]= Total Uncertainty *Where temperature drift is the maximum speci ed test set temperature drift.

  • Page 93: Hp 84125C Test-Set Uncertainties

    This error is valid when the HP 84125C system is used in an ambient temperature range of 20 C to 30 C. To calculate the total amplitude uncertainty, the individual uncertainties described above must be combined.
  • Page 94 Resolution bandwidth switching uncertainty: 0.5 dB Analyzer scale delity uncertainty: 0.85 dB The measurement uncertainties for the HP 84125C test set are found in Test Set and Antenna Factor Accuracy speci cations found earlier in this chapter. The measurement uncertainties for the HP 84125C...

  • Page 95: A-1. Hp 84125C System Uncertainties

    Analyzer Scale spectrum analyzer 3 sigma normal 0.85 dB 0.28 dB Fidelity Uncertainty speci cations speci cation HP 84125C Test Set and System Uncertainties Antenna Factor HP 84125C speci cation assumed 2.0 dB 1.16 dB Uncertainty speci cations uniform Antenna to Test Set...
  • Page 96 2*(2.77) + 1.5 = 7.04 dB This is the total amplitude uncertainty in the measured eld strength of the HP 84125C system for these measurement settings. The uncertainty for each set of measurement conditions must be calculated separately. It is recommended that you follow the procedure in NAMAS, Publication NIS 81 for calculating the amplitude uncertainty under your speci c measurement conditions.
  • Page 98 Index 1 - 18 GHz test set con guration, 4-1 1.5 GHz to 18 GHz, 5-4 18 - 26.5 GHz test set con guration, 4-4 18 GHz to 26.5 GHz, 5-5 1 GHz to 18 GHz, 5-3 26.5 - 40 GHz test set con guration, 4-6 26.5 GHz to 40 GHz, 5-5 3.5 GHz to 18 GHz, 5-4 3.5 mm connections, 4-7...
  • Page 99 Windows NT 4.0, 7-8 handling, 4-8 Hewlett-Packard sales and service locations, 8-4 HIGHEST PEAK, 5-6 HP841254C Con g, 5-6 HP 84125C utility, 7-11 HP-IB con guration, 7-12 setting up, 7-2 setup for Windows 3.1, 7-2 setup for Windows 95, 7-3 setup for Windows NT 4.0, 7-4...
  • Page 100 8-2 requirements minimum PC, 7-2 PC, 7-2 returning for repair, 8-4 returning the system, 8-3 returning to HP, 8-3 SAVE MKR #1 - #9, 5-10 SELECT LINEAR, 5-10 SELECT LOG, 5-10 SERVICE, 5-11 service oces, HP, 8-4 service, returning for, 8-3...
  • Page 101 system calibration, 8-2 characteristics, 2-1 components list, 3-2 description, 1-1 DLP, 5-1 functional test, 3-10 installation, 3-1, 3-4 returning, 8-4 setup, 3-1 softkeys, 5-1 speci cations, 2-1 system interface, 5-1 test set components, 3-2 con guration, 1-18 GHz, 4-1 con guration, 18 - 26.5 GHz, 4-4 con guration, 26.5 - 40 GHz, 4-6 hardware con gurations, 4-1 TIMEDATE ON OFF, 5-11...

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