Anritsu ME7840A Operation And Maintenance Manual
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Anritsu ME7840A Operation And Maintenance Manual

Anritsu ME7840A Operation And Maintenance Manual

Power amplifier test system
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MODEL
ME7840A
POWER AMPLIFIER TEST SYSTEM
OPERATION AND
MAINTENANCE MANUAL
490 JARVIS DRIVE - MORGAN HILL, CA 95037-2809
P/N: 10410-00225
REVISION: A
PRINTED: JUNE 2000
COPYRIGHT 2000 ANRITSU CO

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  • Page 1 MODEL ME7840A POWER AMPLIFIER TEST SYSTEM OPERATION AND MAINTENANCE MANUAL 490 JARVIS DRIVE - MORGAN HILL, CA 95037-2809 P/N: 10410-00225 REVISION: A PRINTED: JUNE 2000 COPYRIGHT 2000 ANRITSU CO...

  • Page 2: Limitation Of Warranty

    LIMITATION OF WARRANTY The foregoing warranty does not apply to ANRITSU connectors that have failed due to normal wear. Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifications of the product.

  • Page 5: Safety Symbols

    Safety Symbols Used on Equipment and in Manuals (Some or all of the following five symbols may or may not be used on all ANRITSU equipment. In addition, there may be other labels attached to products that are not shown in the diagrams in this manual.) The following safety symbols are used inside or on the equipment near operation locations to provide infor- mation about safety items and operation precautions.
  • Page 6 WARNING Use two or more people to lift and move this equipment, or use an equipment cart. There is a risk of back injury, if this equipment is lifted by one person. ME7840A OMM...

  • Page 7: Table Of Contents

    INSTALLATION - HARDWARE ......2-2 INSTALLATION - SOFTWARE ......2-7 ME7840A OMM...
  • Page 8 Installation ........2-7 What else is on the CD?....... 2-7 Uninstalling the software.
  • Page 9 .TXT ........A-13 S-PARAMETERS. TXT ....... . A-14 ME7840A OMM iii/iv...
  • Page 11 Figure 1-1. Model ME7840A Power Amplifier Test System (PATS)

  • Page 12: Chapter 1 General Information

    The procedures described in this manual presume a working knowledge of vector network analyzers and RF power amplifier testing procedures. Refer to the other manuals supplied with the ME7840A (see below) for more detailed explanations of the system equipment and procedures.

  • Page 13: Conventions

    HARDWARE DESCRIPTION Throughout this manual, the ME7840A Power Amplifier System may be referenced as PATS or ME7840A; the MS462XC may be referenced as Scorpion or MS462XC; and the MS4782X Test Set may be referenced as Test Set or MS4782X. All ANRITSU instruments are assigned a unique six-digit serial number, such as “940101.”...

  • Page 14: Hardware Description

    MODULATION OPTIONAL EXTERNAL SYNTHESIZER PRE-AMP Indicates coax jumper in the as-shipped configuration Figure 1-2. Overall Functional Block Diagram of the Basic Power Amplifier Test System (PATS) with MS4782D Test Set ME7840A OMM SOURCE 1 FORWAR REVERSE TRANSFER SWITCH STEP ATTENUATORS...

  • Page 15: General Information

    HARDWARE DESCRIPTION SOURCE 2 OPTIONAL EXTERNAL PREAMPLIFIERS COMBINER OPTIONAL MODULATION OPTIONAL EXTERNAL SYNTHESIZER PRE-AMP Indicates coax jumper in the as-shipped configuration Figure 1-3. Overall Functional Block Diagram of the Option 2 Power Amplifier Test System (PATS) with MS4782A Test SOURCE 1 FORWAR REVERSE TRANSFER SWITCH...

  • Page 16: System Description

    2. This Max AUT power assumes a minimum isolation of 23 dB provided by external circulator(s). Two circulators may have to be used to provide the required isolation. SYSTEM DESCRIPTION DRA Scorpion ME7840A OMM Reverse Measurements (Watts) , Hot S Brief descriptions of the DRA Scorpion (MS462XC) and MS4782X Test Set are given below.

  • Page 17: Ms4782X Test Set

    SYSTEM DESCRIPTION MS4782X Test Set The Series MS4782X Test Set contains a Wilkinson type combiner that combines the two RF signals from Ports 1 and 3 (RF1 & RF3) of the Scor- pion. External preamplifiers can optionally be provided at the combiner input to boost the input RF power to the amplifier-under- test (AUT).

  • Page 18: Connectors And Ports

    AUT. The software supplied by ANRITSU supports operator control of the source selection switch and step attenuator in the test set. This control is achieved through the parallel TTL control lines available at the Scorpion rear panel “External I/O”...
  • Page 19 SYSTEM DESCRIPTION IEEE 488.2 GPIB Dedicated GPIB WARNING NO OPERATOR SERVICE- ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. N274 Noise Noise +28V Figure 1-4. MS462XC Rear Panel Showing Ports a N274 Control CAUTION WARNING NO OPERATOR SERVICE- DO NOT OPERATE ABLE PARTS INSIDE.

  • Page 20: K Factor

    3 dB gain compression occurs, back up 1 in- crement, and reset this as the upper bound of the power sweep. The ME7840A software exhibits an open architecture that has been de- veloped using standard C++ and Visual Basic languages. The software is compiled as an Active X exe module.

  • Page 21: Test Executive

    TEST EXECUTIVE 1-10 The functions of the Test Executive, if supplied by ANRITSU or by the customer, would include: Test Sequence development and management Part number and serial number management Interface with the Database GENERAL INFORMATION ME 7840A OMM...

  • Page 22: Software Structure

    Test Executive: Automated Testing, Test Plan Development ( optional item ) Measurement, Calibration & Tuning VNA PowerTools Scorpion VNMS Figure 1-6. PATS Software Structure ME7840A OMM The software structure is illustrated in Figure 1-6 (below). GUI/EXE Anritsu Modules DLL/GUI V4.00 GPIB...

  • Page 23: Ms7840A Options

    Replaces MS4782D Test Set with MS4782A Test Set Delete Test Set (Note: The ND43425 Accessory and Inter- connect Kit will also be deleted with this option.) The accessories described below are available from ANRITSU. Model ML2430A Power Meter Model MG3672A Digital Modulation Signal Generator/with...

  • Page 24: Preventive Maintenance

    MS4782D Test Set. The same cable is also used to connect the Test Set to the MS462XC receivers on the rear panel. The ME7840A Power Amplifier Test System does not require any preven- tive maintenance. The ANRITSU MS4782X is the recommended test set for PATS; however, users supply their own test set.

  • Page 25: Performance Specifications

    PERFORMANCE SPECIFICATIONS Table 1-3. Performance Specifications for ME7840A Power Amplifier Test System Characteristic Amplifier Under Test Power Output Bandwidth through Test Set Amplifier Under Test Input Power range available from PATS IMD 3rd Order Dynamic Range Port Power Accuracy Drift over 60 hours...

  • Page 26: Recommended Items

    None Required if amplifier-under-test (AUT) has SMA/3.5 mm connectors The following items required for the operation of the ME7840A Power Amplifier Test System must be supplied by the user. Critical Specification Pentium II or better, 200 MHz or faster, with WindowsÒ 95/98/2000 or NT operating system and National Instruments GPIB card installed.

  • Page 27: Chapter 2 Installation

    This chapter describes the installation, connection and set-up of the equipment that comprises the ME7840A Power Amplifier Test Station. The ME7840A is made up of the following pieces of equipment: Scorpionâ Vector Network Measurement System (VNMS), Direct Receiver Access (DRA) version:...

  • Page 28: Installation - Hardware

    INSTALLATION - HARDWARE INSTALLATION - HARDWARE Foot Figure 2-1. ME7840A Component Assembly A listing of the non-optional-accessories always supplied with PATS is listed below. The cables and terminators are shown in Figures 2-3 and 2-2, on page 2-3. Item Broadband Termination...
  • Page 29 INSTALLATION EXTERNAL SOURCE INSTALL 50 OHM TERMINATIONS ON UNUSED PORTS Figure 2-3. ME7840A Front RF Cable Connections (through-line shown between test port 1 and test port 2) GPIB CONNECTOR DEDICATED GPIB CONNECTOR (Used during power level calibration) RF CABLES (4ea)
  • Page 30 Connect the GPIB cable from IEEE-488.2 connector on the rear panel of the MS462XC to the PC/System Controller. (Note: This cable is not supplied with the ME7840A PATS.) Step 6. Connect an AC power cord to each of the three-prong connec- tors on the rear panel of the Test Set and the MS462XC.
  • Page 31 INSTALLATION INSTALLATION - HARDWARE CURRENT SENSOR EXTERNAL ANALOG CABLE PASSAGE IN CONNECTOR CURRENT PROBE HEAD Figure 2-4. Current Probe Connection ME7840A OMM...
  • Page 32 INSTALLATION - HARDWARE INSTALLATION Figure 2-5. Software Installation Window ME 7840A OMM...

  • Page 33: Installation - Software

    ME7840A OMM INSTALLATION - SOFTWARE ME7840A software is delivered on a CD. The ANRITSU Power Tools li- brary Version 4.0 or higher, which is required to be installed on the target system (the PC which is receiving the installation of ME7840A software).

  • Page 34: Service Centers

    Beijing Fortune Building 1515, 5 Dong San Huan Bei Lu Chaoyang qu, Beijing 100004, China Telephone: 011861065909231 FAX: 011861065909235 ANRITSU Service Centers are listed in Table 2-2. FRANCE ANRITSU S.A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Cedex...

  • Page 35: Chapter 3 Operations, General

    ME7840A OMM Chapter 3 Operations, General The basic operation of the Model ME7840A Power Amplifier Test Station (without external preamplifiers) is described in this and the following two chapters: Calibration Operations and Measurement Operations. “Calibra- tion Operations” describes the software measurement calibration func- tion and “Measurement Operations”...

  • Page 36: Preparing The System

    Step 8. If drain current and/or PAE measurements are desired, the optional current probe (ANRITSU part number 2000-1067 or -1085) can be used. Ensure the probe (Figure 3-1) has a fresh battery, and set the zero offset using the MS4623C as follows: Using Domain softkey, set to Transmission &...
  • Page 37 Cal / Zero Customer Supplied Power Supply for AUT Optional Current Probe Connect when directed by procedure for power calibrations Figure 3-1. PATS Power On Sequence ME7840A OMM GPIB Port 3 Port 1 Port 3 Port 1 Test Port 1...

  • Page 38: Using Pats Software

    USING PATS SOFTWARE USING PATS SOFTWARE Select “Start” then “Programs” then “Pats V1.1” Figure 3-2. Starting the PATS Software Software Organization PATS software requires a computer with GPIB capability running Win- dows 95 or better (98/NT/2000). The software is started by selecting the “Start”...

  • Page 39: Collateral Functions

    OPERATIONS, GENERAL COLLATERAL FUNCTIONS File ME7840A OMM The PATS software collateral functions are found on the top menu bar un- der “Files,” “Tools,” and “Help.” (below) Top Menu Bar Same as File, Save Files from PC Same as File, Recall...

  • Page 40: Help

    COLLATERAL FUNCTIONS Help Save Cal Files to PC. Displays a dialog box (similar to that shown for Recall Cal Files from PC, below) showing the cal files stored in the default folder (Temp). This function is useful for saving the front panel setup and calibration data to a file on the PC.

  • Page 41: Tools

    OPERATIONS, GENERAL Tools ME7840A OMM The “Tools” menu (below) displays a drop-down list that provides three collateral options described below. The “Run Calibration Files” option is described in Chapter 4. Check Communications to VNA: Runs a test to check that the VNA communicates with the PC. Run this op- tion first to ensure that the PATS setup is correct and functioning properly.
  • Page 42 COLLATERAL FUNCTIONS OPERATIONS, GENERAL Calibration File Options: Provides options for finding and recalling calibration files (below). These files are used to establish test setup for the measurements de- scribed in Chapter 5. If no file is selected in an area (S Parameter, Power Sweep, IMD, etc., the associated mea- surement will assume the PATS default setting.

  • Page 43: Chapter 4 Operations, Calibration

    Each of the ME7840A measurements requires a cal- ibration to account for measurement uncertainties. This chapter de- scribes the measurement calibration operations of the Model ME7840A Power Amplifier Test System software.

  • Page 44: Test Equipment

    TEST EQUIPMENT TEST EQUIPMENT OPERATIONS, CALIBRATION Alternatively, Scorpion front panel settings may be set manually and ap- plied during the automated measurements under PATS software as fol- lows: On the Measurement Window click the Pause button On the Scorpion front panel press the “Clr / Local” button to take manual control of the Scorpion.

  • Page 45: General

    OPERATIONS, CALIBRATION GENERAL ME7840A OMM Calibration operations are described in this and the following paragraphs Step 1. Click on “Start,” “Programs,” “Pats V1.1,” then “Pats” (Figure 3-2, page 3-4) to start the software. The PATS flash screen (below) briefly appears, then the main screen.

  • Page 46: Power Level

    POWER LEVEL POWER LEVEL OPERATIONS, CALIBRATION sure that the equipment is properly connected to the bus. If so, the following screen will be displayed: Step 3. Click on “Run Calibration Procedure” to display a list of cali- bration specification files (below). (Refer to paragraph 4-3 for a description of these files.) Running the files is described in succeeding numbered paragraphs.
  • Page 47 Many calibration kits include adapters that are designed to have equal phase length. These parts are called phase equal adapters (PEA). ANRITSU designs in-series adapters (e.g., SMA Connector M-M, M-F, F-F) to be phase insertable when technically possible.
  • Page 48 POWER LEVEL OPERATIONS, CALIBRATION The linear power calibration takes up-to-5 minutes to complete. It calibrates the output power at the refer- ence plane for both internal sources (power out of Port 1 then Port 3) according to the target power across the frequency range set in the calibration speci- fication file.
  • Page 49 OPERATIONS, CALIBRATION ME7840A OMM Step 6. Before pressing “Next” disconnect the power sensor and con- nect a throughline between Test Ports 1 and 2 on the MS4782X Test Set, as shown below. Step 7. Press “Next” to perform a receiver calibration. When this cali- bration finishes, the program returns to the main screen.

  • Page 50: Hot S22

    HOT S22 HOT S22 OPERATIONS, CALIBRATION The “B_HotS22.txt” file provides prompts for setting up a Hot S cation file. Hot S is a return loss measurement of an amplifier’s output port (Port 2) while stimulus is applied to its input port. The prompts cause the Scorpion to be placed into a state where it is ready to make cali- brated measurements on the user’s AUT.
  • Page 51 OPERATIONS, CALIBRATION ME7840A OMM Step 3. Press “Next” for the next prompt (below). The 3653 or 3753LF Calibration Kits contain a disk with calibration data. The data has to be installed from the MS462C front panel. To do so, place the floppy disk from the kit into the MS462XC disk drive.
  • Page 52 HOT S22 4-10 OPERATIONS, CALIBRATION Step 6. Press “OK” for the next step (below). Connect the Load to Port Step 7. Press “OK” to complete the Hot S calibration. ME 7840A OMM...

  • Page 53: S-Parameters Cal

    OPERATIONS, CALIBRATION S-PARAMETERS ME7840A OMM The “C_S-Parameters Cal.txt” file to provides prompts for setting up S-parameters specification file. The prompts cause the Scorpion to be placed into a state where it is ready to make calibrated measurements on the user’s AUT. At the completion of the program, the state information is saved to a *.cal file.
  • Page 54 STALL KIT INFO FROM FLOPPY DISK softkeys. Step 4. Press “OK” for the next step (below). Connect the Broadband Load on Test Ports 1 and 2 on the ME7840A Test Set. Step 5. Press “OK” for the next step (below). Connect the Open to Test Port1 and the Short to Test Port 2.
  • Page 55 OPERATIONS, CALIBRATION ME7840A OMM Step 6. Press “OK” for the next step (below). Connect the Short to Test Port 1 and the Open to Test Port 2. Step 7. Press “OK” for the next step (below). Connect the Throughline between Test Ports 1 and 2.
  • Page 56 S-PARAMETERS CAL OPERATIONS, CALIBRATION Step 8. Press “OK” to complete the S Parameters calibration (below). 4-14 ME 7840A OMM...

  • Page 57: Cal File Setup

    OPERATIONS, CALIBRATION CAL FILE SETUP ME7840A OMM The “D_Cal File Setup.txt” file provides prompts for setting up One-tone power sweep, IMD, Two-Tone Power Sweep, and Harmonic specification file. The prompts cause the Scorpion to be placed into a state where it is ready to make calibrated measurements on the user’s AUT.

  • Page 58: Cal File Setup

    CAL FILE SETUP 4-16 OPERATIONS, CALIBRATION Step 3. Press “Next” for the next prompt (below). The 3653 or 3753LF Calibration Kits contain a disk with calibration data. The data has to be installed from the MS462C front panel. To do so, place the floppy disk from the kit into the MS462XC disk drive.
  • Page 59 OPERATIONS, CALIBRATION CAL FILE SETUP Step 5. Press “OK” to continue to the IMD cal file setup prompt (be- low). Follow the prompt and connect a throughline between Test Ports 1 and 2 on the MS4782X Test Set. ME7840A OMM 4-17...
  • Page 60 CAL FILE SETUP OPERATIONS, CALIBRATION Step 6. Press “Next” to begin the Power Sweep cal file setup (below). 4-18 ME 7840A OMM...
  • Page 61 OPERATIONS, CALIBRATION ME7840A OMM Step 7. Press “Next” to perform Harmonic Cal File Setup calibration (below). Step 8. Press “Next” to end the calibration and return to the main screen. CAL FILE SETUP 4-19/4-20...

  • Page 62: Chapter 5 Operations, Measurement

    ME7840A software: S-Parameters, Power Sweep, IMD (intermodulation distortion), Harmonics, and Hot S Refer to Chapter 3 for general operation and setup of the ME7840A. Measurements always include a degree of uncertainty due to imperfec- tions in the measurement system. The measured value is always a combi- nation of the actual value plus the systematic measurement errors.

  • Page 63: Calibration(S) Not Completed

    GENERAL Calibration(s) Not Completed OPERATIONS, MEASUREMENT n C5, Hot S ¾ “Hots22_1.cal” Step 5. Select appropriate file “Open” (below). Sometimes users may wish to run a measurement using default settings, that is, without spending the time required to calibrate. The procedure below gives instructions.
  • Page 64 OPERATIONS, MEASUREMENT ME7840A OMM n D1, S-Parameters and Hot S ü Points = 201 ü Start Frequency = 800 MHz ü Stop Frequency = 2400 MHz ü Input Power = 0 dB n D2, Power Sweep (2 tone power sweep) ü...

  • Page 65: S-Parameter Tests: S

    ” measurement and will describe certain differences at the end of the procedure. Procedure. Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: The inputs required for this test are de- scribed below.
  • Page 66 OPERATIONS, MEASUREMENT Figure 5-1. S-Parameters Test Screen for S ME7840A OMM Select Start Test: Observe that the test screen (Figure 5-1) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Two data files are written to the C:\Program Files\Pats\Datafiles folder;...
  • Page 67 S-PARAMETERS OPERATIONS, MEASUREMENT Change Params: Returns to User Input screen. Autoscale Checkbox: Turns autoscale on or off. Autoscale automatically scales the mea- surement results. Reset/Zoom: Disabled for this test. Max/Min: Type in maximum and minimum display value. Use Rescale after changing val- ues.

  • Page 68: S-Parameter Test: K Factor

    This test describes the K Factors measurement. This measurement is described in Chapter 1, paragraph 1-10. Procedure. Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: The inputs required for this test are de- scribed below.
  • Page 69 S-PARAMETER TEST: K FACTOR Figure 5-2. S-Parameters Test Screen for S OPERATIONS, MEASUREMENT Select Start Test: Observe that the test screen (Figure 5-1) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Two data files are written to the C:\Program Files\Pats\Datafiles folder;...
  • Page 70 OPERATIONS, MEASUREMENT ME7840A OMM S-PARAMETER TEST: K FACTOR Change Params: Returns to User Input screen. Autoscale Checkbox: Turns autoscale on or off. Autoscale automatically scales the mea- surement results. Reset/Zoom: Disabled for this test. Max/Min: Type in maximum and minimum display value.

  • Page 71: Power Sweep, Two Tone

    This measurement module has three variations of possible Measurement Types: Power Sweep (single frequency), Multi Frequency Power Sweep, Gain and IMD. Procedure. Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below:...
  • Page 72 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, TWO TONE Test Set Setting: Byte value for setting test set attenuation and source switch (below). Internal Source Value External Source 0 dB 0 dB 10 dB 10 dB 20 dB 20 dB 30 dB...
  • Page 73 POWER SWEEP, TWO TONE Figure 5-3. Single Frequency Power Sweep Test 5-12 OPERATIONS, MEASUREMENT Select Start Test and observe that the test screen (Figure 5-3) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Excel data is written to C:\Pro- gram Files\Pats\Datafiles - the file name will have a time stamp.
  • Page 74 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, TWO TONE Autoscale Checkbox: Turns autoscale on or off. Autoscale automatically scales the mea- surement results. Reset/Zoom: Disabled for this test. Max/Min: Type in maximum and minimum display value. Use Rescale after changing val- ues.

  • Page 75: Multiple Frequency Power Sweep

    POWER SWEEP, TWO TONE Multiple Frequency Power Sweep 5-14 OPERATIONS, MEASUREMENT Procedure. Measurement Type: Drop down options. Set to “Multi Freq Power Sweep ” for this test. Main Tone (MHz): CW Frequency setting for source 1. The user may set a lower tone and upper tone.
  • Page 76 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, TWO TONE Test Set Setting: Byte value for setting test set attenuation and source switch (below). Internal Source Value External Source 0 dB 0 dB 10 dB 10 dB 20 dB 20 dB 30 dB...
  • Page 77 POWER SWEEP, TWO TONE Figure 5-4. Multiple Frequency Power Sweep Test 5-16 OPERATIONS, MEASUREMENT Select Start Test. Observe that the test screen (Fig- ure 5-4) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Excel data is written to C:\Pro- gram Files\Pats\Datafiles - the file name will have a time stamp.
  • Page 78 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, TWO TONE Pause/Go: Stops data transfer from VNA to PC and places MS4623C in “Local” mode. Return: Returns to the main PATS screen. Change Params: Returns to User Input screen. Y1, Y2: Provides for rescaling the left or right axis.

  • Page 79: Gain And Imd Power Sweep

    POWER SWEEP, TWO TONE Gain and IMD Power Sweep 5-18 OPERATIONS, MEASUREMENT Procedure: Measurement Type: Drop down options. Set to “Gain and IMD ” for this test. Main Tone (MHz): CW Frequency setting for source 1. Offset (kHz): Offset frequency for Source 2 (Source 2 will be set to Main Tone + Offset) Start Power (dBm): Power will be swept starting at the start power (input RF power to AUT).
  • Page 80 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, TWO TONE Test Set Setting: Byte value for setting test set attenuation and source switch (below). Internal Source Value External Source 0 dB 0 dB 10 dB 10 dB 20 dB 20 dB 30 dB...
  • Page 81 POWER SWEEP, TWO TONE Figure 5-5. Power Sweep Gain and IMD Test Screen, with Markers Selected 5-20 OPERATIONS, MEASUREMENT Select Start Test. Observe that the test screen (Fig- ure 5-5) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer.
  • Page 82 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, TWO TONE Return: Returns to the main PATS screen. Change Params: Returns to User Input screen. Y1, Y2: Provides for rescaling the left or right axis. Rescale: Rescales the measurement results. Max/Min: Type in maximum and minimum display value.

  • Page 83: Power Sweep, One Tone

    This measurement module has three variations of possible Measurement Types: Power Sweep (single frequency), Multi Frequency Power Sweep, Gain and IMD. Procedure. Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: Measurement Type: Drop down options set to “Gain and Phase ”...
  • Page 84 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, ONE TONE Test Set Setting: Byte value for setting test set attenuation and source switch (below). Internal Source Value External Source 0 dB 0 dB 10 dB 10 dB 20 dB 20 dB 30 dB...
  • Page 85 POWER SWEEP, ONE TONE Figure 5-6. Single Frequency Power Sweep Test 5-24 OPERATIONS, MEASUREMENT Select Start Test and observe that the test screen (Figure 5-3) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Excel data is written to C:\Pro- gram Files\Pats\Datafiles - the file name will have a time stamp.
  • Page 86 OPERATIONS, MEASUREMENT ME7840A OMM POWER SWEEP, ONE TONE Autoscale Checkbox: Turns autoscale on or off. Autoscale automatically scales the mea- surement results. Max/Min: Type in maximum and minimum display value. Use Rescale after changing val- ues. Rescale: Rescales the measurement results.

  • Page 87: Imd

    5-26 OPERATIONS, MEASUREMENT This test measures inter-modulation distortion. Procedure Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: Measurement Type: Already set to “IM” for IMD –...
  • Page 88 OPERATIONS, MEASUREMENT Figure 5-7. Intermodulation Distortion Test Screen ME7840A OMM Select Start Test. Observe that the test screen (Fig- ure 5-7) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Excel data is written to C:\Pro- gram Files\Pats\Datafiles - the file name will have a time stamp.
  • Page 89 5-28 OPERATIONS, MEASUREMENT Return: Returns to the main PATS screen. Change Params: Returns to the User In- put screen. Rescale: Rescales the measurement results. Max/Min: Type in maximum and minimum display value. Use Rescale after changing val- ues. Autoscale Checkbox: Turns autoscale on or off.

  • Page 90: Harmonics

    ME7840A OMM The harmonics test measures and displays the harmonics in the device under test. Procedure Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: Measurement Type: Already set to “HA”...
  • Page 91 HARMONICS Figure 5-8. Initial Harmonics Test Screen 5-30 OPERATIONS, MEASUREMENT Select Start Test and observe that the test screen (Figure 5-8) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Excel data is written to C:\Pro- gram Files\Pats\Datafiles - the file name will have a time stamp.
  • Page 92 OPERATIONS, MEASUREMENT ME7840A OMM HARMONICS Change Params: Returns to User Input screen. Autoscale Checkbox: Turns autoscale on or off. Autoscale automatically scales the mea- surement results. Max/Min: Type in maximum and minimum display value. Use Rescale after changing val- ues.

  • Page 93: Hot S22

    (Source 1) provides a pilot tone injected to the output of the AUT for measuring S Procedure Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: S Parameter: Already set to “Hot S...
  • Page 94 OPERATIONS, MEASUREMENT ME7840A OMM Test Set Setting: Byte value for setting test set attenuation and source switch: Internal Source 0 dB 10 dB 20 dB 30 dB 40 dB 50 dB 60 dB The PATS Hot S measurement provides the following additional fea-...
  • Page 95 HOT S22 Figure 5-9. Hot S Test Screen 5-34 OPERATIONS, MEASUREMENT Select Start Test and observe that the test screen (Figure 5-9) appears. Button Panel Options: Print: Prints a copy of the screen graphic to a printer. Write Data: Excel data is written to C:\Pro- gram Files\Pats\Datafiles - the file name will have a time stamp.
  • Page 96 OPERATIONS, MEASUREMENT ME7840A OMM Change Params: Returns to User Input screen. Autoscale Checkbox: Turns autoscale on or off. Autoscale automatically scales the mea- surement results. Reset/Zoom: Disabled for this test. Max/Min: Type in maximum and minimum display value. Use Rescale after changing val- ues.

  • Page 97: Chapter 6 Performance Verification Procedure

    The following equipment is required to performthe verification proce- dures. ANRITSU Model ML243XA Power Meter ANRITSU Model MA247XA Power Sensor ANRITSU Model 3653 or 3753LF N connector Calibration Kit ANRITSU Model SC5237 6 dB Offset Termination ANRITSU Model SC5270 20 dB Offset Termination ANRITSU Model 11N50B Power Divider...

  • Page 98: Source Output Accuracy

    SOURCE OUTPUT ACCURACY SOURCE OUTPUT ACCURACY Setup: Figure 6-1. ML2430A Series Power Meter GPIB connection to the MS462XX Vector Network Measurement System Test Procedure PERFORMANCE VERIFICATION This test verifies the source output accuracy of the MS462XC. The test procedure uses the Power ALC Verification built-in function of the MS462XC Basic Measurement software.

  • Page 99: Return Loss Confidence Test

    The failed test result is also recorded in theService Log. RETURN LOSS CONFIDENCE TEST Setup ME7840A OMM RETURN LOSS CONFIDENCE TEST Step 4. Connect power sensor to MS462XC Port 1 and select START VERIFICATION softkey. Step 5. Verify that Source 1 passes this test.

  • Page 100: Test Procedure

    RETURN LOSS CONFIDENCE TEST Test Procedure: PERFORMANCE VERIFICATION RETURN RETURN Step 5. Press Display key and select: DISPLAY MODE SINGLE CHANNEL RETURN Step 6. Press Ch 4 key and then Display key. Step 7. Select: GRAPH TYPE LOG MAGNITUDE Step 8. Press Ch 1 key and select LOG MAGNITUDE.

  • Page 101: Performance Verification

    PERFORMANCE VERIFICATION ME7840A OMM RETURN LOSS CONFIDENCE TEST Step 6. Connect SC5237 6 dB Offset Termination to Test Port 1 of MS4782 Test Set. Record the measured value in Table 6-1 and verify the measured S SC5237 Termination. Step 7.

  • Page 102: System Dynamic Range

    SYSTEM DYNAMIC RANGE Table 6-1. Return Loss Specifications Offset Termination Measured S SC5237 SC5270 * Apply to Test Set with Hot S Capability only. SYSTEM DYNAMIC RANGE Test Procedure: PERFORMANCE VERIFICATION Value Measured S This test verifies the PATS system dynamic range. Step 1.
  • Page 103 PERFORMANCE VERIFICATION ME7840A OMM PERFORM CAL: 2 PORT CAL METHOD: STANDARD LINE TYPE: COAXIAL SELECT CALIBRATION TYPE: TRANSMISSION FREQUENCY RESPONSE PATH: FORWARD PATH (S USE OF ISOLATION IN CALIBRATION: INCLUDE FREQUENCY RANGE: 800 MHz TO 2400 MHz SELECT CALIBRATION DATA POINTS: NORMAL...

  • Page 104: Receiver Display Linearity

    RECEIVER DISPLAY LINEARITY RECEIVER DISPLAY LINEARITY ML243XA Power Meter ML2408A Power Meter Power Meter + / - ON / OFF Sensor Channel Trigger System Cal / Zero Figure 6-2. Receiver Magnitude Display Linearity Test Setup Setup: NOTE Zero and calibrate Power Sensor prior to connecting to the power divider.
  • Page 105 Ensure that the Power Sensor Cal Factor is set for 1 GHz. Refer to the ML24XXA Operational ME7840A OMM RECEIVER DISPLAY LINEARITY Step 9. Toggle C.W. MODE OFF soft key to C.W. MODE ON. Step 10. Change C.W. Frequency to 1 GHz.
  • Page 106 RECEIVER DISPLAY LINEARITY Table 6-2. Receiver Magnitude Display Linearity Specifications PORT 1 ATTN Power Meter Setting (dB) Reading 6-10 PERFORMANCE VERIFICATION Step 25. Press Power key and select SOURCE 1 SETUP. Step 26. Set PORT 1 ATTN to 10 dB. Record the Power Meter Readout and the Marker 1 Readout to the table on next page.

  • Page 107: Chapter 7 Preamplifier Operations

    USE OF EXTERNAL PREAMPLIFIERS Alternative 1 Alternative 2 ME7840A OMM Chapter 7 Preamplifier Operations This chapter describes the use of external preamplifiers to boost signal power at the input of an test amplifier. External preamplifiers can be used to boost signal level at the input of the Amplifier Under Test (AUT).

  • Page 108: Use Of External Preamplifiers

    USE OF EXTERNAL PREAMPLIFIERS PREAMPLIFIER OPERATIONS an approximate source power (at the Scorpion Port 1, Port 3, or both). For tests involving power sweep, the MS7840A enables a linear power calibration over the desired power range (and the frequency range). For this calibration, the user can specify his target power start and stop val- ues and a nominal power offset between this reference plane and the Scorpion source (the net of preamplifier gain minus test setup losses).
  • Page 109 SOURCE 2 OPTIONAL EXTERNAL PREAMPLIFIERS COMBINER OPTIONAL MODULATION SYNTHESIZER USER SUPPLIED CIRCULATOR & TERMINATION Figure 7-1. MS4782A with External Preamplifiers (Moderate Power) ME7840A OMM USE OF EXTERNAL PREAMPLIFIERS SOURCE 1 FORWAR REVERSE TRANSFER SWITCH STEP ATTENUATORS 70dB, 10dB/step RECEIVERS -30dB LIMITER...
  • Page 110 USE OF EXTERNAL PREAMPLIFIERS SOURCE 2 EXTERNAL PREAMPLIFIERS HYBRID COUPLER/ COMBINER TERMINATIONS Figure 7-2. MS4782A with External Combiner PREAMPLIFIER OPERATIONS SOURCE 1 FORWAR REVERSE TRANSFER SWITCH STEP ATTENUATORS 70dB, 10dB/step RECEIVERS COMBINER -30dB -30dB GPIB SYSTEM CONTROLLER (PC) GPIB ANALOG IN EXT I/O CONTROL LINES...

  • Page 111: Appendix A Calibration Specification Files

    INTRODUCTION FILE TYPES OPEN FILES TECHNICAL DETAILS ME7840A OMM Appendix A Calibration Specification Files This appendix describes the Calibration Specification Files that are used to specify calibrations that are performed when accessing “Tools,” “Run Calibration Procedures” in the PATS software. It lists file types, describes how to open the files for edit, provides technical details of the files, and shows typical file listings.

  • Page 112: Technical Details

    TECHNICAL DETAILS Table A-1. Technical Details of Calibration Specification Files (1 of 9). GENERAL Header Calibration Specification Section 1 Calibration Specification Section 2 Calibration Specification Section N General Structure of file: General syntax: field field <Keyword>, <value 1>, <value 2>, a.
  • Page 113 Instrument Setup Sets up instrument for harmonic measurement. Uses Flat Power Cal and Receiver cal as they exist in the Scorpion's non-volatile memory. e. powsweep Instrument Setup Sets up instrument for IMD-mode power sweep. ME7840A OMM //comment //comment //comment TECHNICAL DETAILS...
  • Page 114 TECHNICAL DETAILS Table A-1. Technical Details of Calibration Specification Files (3 of 9). II CALIBRATION SPECIFICATIONS, TYPES pow (Power Level) POW_START Header Details POW_END Header Section Keywords ncal Number of calibration sequences of this type to run. For type = pow, each sequence consists of: linear cal (for power sweeps) flat power cal...
  • Page 115 Name of *.cal file to save when calibration sequence completes. Start frequency in MHz for global calibration NOTE: Set a wide frequency range. Miminum value is 10; ensure f1 is less Stop frequency in MHz. Example Refer to Figure A-1 (page A-11). ME7840A OMM than 2. TECHNICAL DETAILS...
  • Page 116 TECHNICAL DETAILS Table A-1. Technical Details of Calibration Specification Files (5 of 9). sp and Hot S (S Parameters & Hot S SP_START Header Details SP_END Header Section Keywords: ncal Number of calibration sequences of this type to run. npts Number of frequency points to use during the calibration sequence.
  • Page 117 NOTE: Set a wide frequency range. Miminum value is 10; ensure f1 is less Stop frequency in MHz. Example Refer to Figure A-2 for Hot S S Parameters . ME7840A OMM only. Source 2 power setting. than 2. (page A-12) and Figure A-4 (page A-14) for TECHNICAL DETAILS...
  • Page 118 TECHNICAL DETAILS Table A-3. Technical Details of Calibration Specification Files (7 of 9). powsweep (Power Sweep - IMD mode or 2-tone mode): POWSWEEP_START Header Details POWSWEEP_END Header Section Keywords: ncal Number of calibration sequences of this type to run. npts NOTE: npts is IGNORED.
  • Page 119 First calibration name Name of *.cal file to save when calibration sequence completes. Main tone, MHz Maximum display range, MHz NOTE: Minumum display range is automatically set to 100 MHz. Example Refer to Figure A-2 (page A-12). ME7840A OMM TECHNICAL DETAILS...
  • Page 120 TECHNICAL DETAILS Table A-1. Technical Details of Calibration Specification Files (9 of 9). imd (Imodulation Distortion): IMD_START Header Details IMD_END Header Section Keywords: ncal Number of calibration sequences of this type to run. Start power level for sweep: Set on for Source 1. IF bandwidth: Legal values are 10, 30, 100, 300, 1000, 3000, 10000, 30000 avgs Averages: (Optional).

  • Page 121: Power Leve.txt

    Figure A-1. Power Level Calibration Specification File CAL FILES SETUP.TXT ME7840A OMM The Power Level.txt file is shown in Figure A-1 //Number of DUTs //Power Level Calibration (requires Power Meter) //Perform Global Linear, Flat Power and Receiver Calibrations...

  • Page 122: Cal Files Setup.txt

    CAL FILES SETUP.TXT ndut,1, type,powsweep type,harm type,imd POWSWEEP_START ncal,1, npts,3, if,3000, avgs,20, pow,-15, switch,8, CAL,1, name,PowSweep,//File name root (append _1 for DUT1, _2 for f1,900, f2,931, POWSWEEP_END HARM_START ncal,1, if,3000, avgs,20, pow,0, switch,8, CAL,1, name,Harmonics,//File name root (append _1 for DUT1, _2 for DUT2, f1,900 f2,3000, HARM_END...

  • Page 123: Hot .Txt

    SP_END Figure A-3. Hot S Calibration Specification Program File ME7840A OMM The HotS .txt file is shown in Figure A-3. //Number of DUTs //S Parameter calibration //Number of S-Param calibrations //Number of points (default for all)

  • Page 124: S-Parameters. Txt

    S-PARAMETERS. TXT S-PARAMETERS. TXT ndut,1, type,sp, SP_START ncal,1, npts,201, con,FN,FN, if,3000, avgs,0, pow,0, switch,8, CAL,1, caltype,12, f1,800, f2,1200, SP_END Figure A-4. S-Parameters Calibration Specification File A-14 The S-Parameters.txt file is shown in Figure A-4. //Number of DUTs //S Parameter calibration //Number of S-Param calibrations //Number of points (default for all) //Connector Type Options MN,FN,MK,FK,MS,FS...
  • Page 125 Cal Files Setup Calibration Specification File . A-12 ADAPTIVE P STOP ....1-9 CAL FILE SETUP ....4-15 - 19 CAL FILES SETUP.TXT .
  • Page 126 RETURN LOSS CONFIDENCE TEST ..6-3 - 5 SCOPE OF THIS MANUAL... . 1-1 SERIAL NUMBER ....1-2 SERVICE CENTERS.

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