8500A-REVD-1 电路图.pdf

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8500A-REVD-1 电路图.pdf

Manual Part Number:20790 Revision Level: D-1 Configuration Code:27 Print Date: March 2009 Operation enter change using nn.nn UNITS or spin knob Change Window DelayMove cursor to DLY WIND line on display; enter change using nn.nn UNITS or spin knob Change Cursor DelayMove cursor to CSR DLY line on display; enter change using nn.nn UNITS or spin knob Change Internal Trigger LevelMove cursor to TRG LEV line on display; enter change using nn.nn UNITS (or spin knob); or use MENU (1) F1 nn.nn UNITS Change Reference Power (100% Point) Move cursor to REF PWR line on display; enter change using nn.nn UNITS Pulse Sub-Mode Commands Change Pulse Width Start/End %Move cursor to PULSE WID line on display, press nn.n UNITS nn.n UNITS Change Rise Time Start/End %Move cursor to RISE TIME line on display, press nn.n UNITS nn.n UNITS Change Fall Time Start/End %Move cursor to FALL TIME line on display, press nn.n UNITS nn.n UNITS Graph Mode Commands (continued) Marker Sub-Mode Commands Change Marker 1 PercentageMove cursor to MRKR 2-1 line on display, press *nn.n UNITS Change Marker 2 PercentageMove cursor to MRKR 3-2 line on display, press *nn.n UNITS Change Marker 3 PercentageMove cursor to MRKR 4-3 line on display, press *nn.n UNITS Change Marker 4 PercentageMove cursor to 4th line on display, press *nn.n UNITS * Enter nn.n (positive) to place the marker on the rising edge of the pulse. Enter -nn.n (negative) to place the marker on the falling edge of the pulse. GPIB Plotting GPIB Plot (Paper)MENU (2) F3 F1 GPIB Plot (Transparency)MENU (2) F3 F2 Code Number Entry for PlotMENU (5) F1 nnnn UNITS (nnnn = up to 12 digits) Part Number Entry for PlotMENU (5) F2 nnnn UNITS (nnnn = up to 12 digits) Abort (Stop) Plotting ActivityMENU (6) F1 Enter Plotter GPIB AddressMENU (6) F2 nn UNITS Peak Mode Commands Select Peak ModePEAK Select 8501A Internal Trigger and LevelMENU (1) F1 nn.nn dBm mW Select 8502A Internal Trigger and LevelMENU (1) F1 A or B nn.nn dBm mW Select External TriggerMENU (1) F2 Fast Analog OutputMENU (10) F1 Peak AveragingMENU (2) F2 nn UNITS Enable Cursor Delay or Disable Cursor DelayUNITS Enter Reference DelayMENU (4) F1 (ch A) or F2 (ch B) nn.nn UNITS Clear Reference DelayMENU (4) F1 (ch a) and/or F2 (ch b) 0 UNITS Other Dual Channel Commands Detector Offset (Channel B)MENU (3) F2 nn.nn dB Display Ratio A/B Power ModeMENU (7) F2 Select Peak Mode for Channel AA F1 (when using the Ratio Mode) Select CW Mode for Channel AA F2 (when using the Ratio Mode) Select Peak Mode for Channel BB F1 (when using the Ratio Mode) Select CW Mode for Channel BB F2 (when using the Ratio Mode) Exit Ratio ModeCW or PEAK IEEE MEM (2) means to press the MEMory key two times, etc. Two levels of menu displays are available. The first level includes menus for normal 8500A functions. The second level are the menus used during 1018B emulation. MENU (8) in the normal mode enables or toggles the 1018B Emulation mode. MENU Key Displays Normal 8500A Functions KeystrokesMenu Displayed MENU (1) Menu = NEXT MENU F1 set Int Trig and Level F2 set Extrn Trigger F3 to Cal or Zero Detectors MENU (2)Menu = NEXT MENU; Minus = PREV MENU F1 to Enter CW Averaging Number F2 to Enter Peak Averaging Number F3 for GPIB Plot MENU (3)Menu = NEXT MENU; Minus = PREV MENU F1 to Enter Detector A Offset F2 to Enter Detector B Offset (8502A only) F3 to Enter Source of Frequency Correction MENU (4)Menu = NEXT MENU; Minus = PREV MENU F1 to Enter Detector A Ref Delay F2 to Enter Detector B Ref Delay (8502A only) F3 to Select mW Format MENU (5)Menu = NEXT MENU; Minus = PREV MENU F1 to Enter Code Number F2 to Enter Part Number F3 for Read and Set Time MENU (6)Menu = NEXTR MENU; Minus = PREV MENU F1 to Abort Current Plotting Activity F2 to Enter Plotter Address F3 to Enter 8500A Listen and Talk Address MENU (7)Menu = NEXT MENU; Minus = PREV MENU F1 to Set Max and Min Power Limits F2 to Select Ratio Display Mode (8502A only) F3: Hide (or Display) Frequency Information MENU (8)Menu = NEXT MENU; Minus = PREV MENU F2: Emulate 1018B MENU (9)Menu = NEXT MENU; Minus = PREV MENU F1 to Program Detector PROM F2 to Set Initial Dly Value for Autoscaling F3 to Set Averaging Value for Autoscaling NOTE: F1 is used only with the PROM Programmer MENU (10)Menu = NEXT MENU; Minus = PREV MENU F1 for Fast Analog Output F2: Review A Detector PROM F3: Review B Detector PROM (8502A only) MENU (11)Minus = PREV MENU Be Sure No RF is Applied to Detector Press CLEAR to Skip All Tests F1 for Service Functions F2 for Self Test MENU Key Displays (continued): 1018B Emulation Mode Functions KeystrokesMenu Displayed MENU (8)(Bus Trigger Reset; SRQ Enabled) Press CLEAR to return to data display F1 to Disable SRQ (Service Request) F2 for Automatic Trigger Reset F3 to Get Data Fast; No EL Data Display MENU (8)(Auto Trigger Reset; SRQ Disabled) Press CLEAR to return to data display F1 to Enable Service Request F2 for Bus Command Trigger Reset F3 to Get Data Fast; No EL Data Display MENU (9)Menu = NEXT MENU; Minus = PREV MENU Current Range Value is X F1 for Range 1 (XXX.X W) F2 for Range 2 (XX.XX mW) F3 for Range 3 (X.XXX mW) MENU (10)Press CLEAR to return to data display Press MENU for next lower level menu F2 to end 1018B Emulation MENU (11)(Same as MENU (8) for the normal 8500 mode.) MENU (12)(Same as MENU (9) for the normal 8500 mode.) MENU (13)(Same as MENU (10) for the normal 8500 mode.) MEMory Key Displays KeystrokesMenu Displayed MEM (1)Press MEM for additional selections F1 to Recall Setups F2 to Store Setups F3 to get Power-On Setup MEM (2): Press CLEAR to return to data display F1 to Display Current Setup F2 to Display Power-On Setup F3 to Display a Numbered Setup MEM (3): Press CLEAR to return to data display F1 to Re-Initialize the Current Setup F2 to Re-Initialize All but Current Setup F3 to Re-Initialize a Numbered Setup (See other side for a Quick Reference to Functional Commands) Table of Contents About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Record of Manual Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Special Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv 1 Introduction_ 1.1Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1.1Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.2Items Furnished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.3Items Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.4Tools and Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.5Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.6Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.7Receiving Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1.8Returning an Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 1.3Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 2 Operation _ 2.1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2.1PCB-Oriented Voltage Selector and Fuse Holder . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2.2VDE Type Voltage and Fuse Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.3Rear Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 2.4Front Panel Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 2.5Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.5.1Power On Self-Test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.5.2Warm Up Time and Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.6Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.6.1CW Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.6.2Peak Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.6.3Graph Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2.7Self-Calibration and Auto-Zeroing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.7.1Self-Calibration Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.7.2Self-Calibration Failures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 2.7.3Auto-Zero Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 2.8Measurement Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.8.1Frequency Correction, Cal Factor, and dB Offset . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.8.2PROM Frequency Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.8.3User-Supplied Cal Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2.8.4CW Power Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2.8.5Peak Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 2.8.6Peak Power Measurements Using the Graph Mode . . . . . . . . . . . . . . . . . . . . . . . 2-23 2.8.7Pulse, Cursor, and Marker Readouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 2.8.8Cursor Sub-Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 2.8.9Pulse Parameters Sub-Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26 Manual No. 20790, Rev C, November 1998i Superceded by Revision D, March 2009 2.8.10Marker Sub-Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 2.9Digital Plotting of Graphic Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30 2.9.1Plotters Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30 2.9.2Procedure for Making Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30 2.10 Dual Channel Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 2.10.1CW, CW Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 2.10.2Peak, Peak Measurements: Method 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 2.10.3Peak, Peak Measurements: Method 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33 2.10.4Peak, CW Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34 2.10.5Power Ratio Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35 2.11 High Power Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37 2.11.1Power Warning - Max/Min Power Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37 2.12 High Power Measurement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37 2.12.1High Power Relative Measurements (8502A only) . . . . . . . . . . . . . . . . . . . . . . . . . 2-39 2.13 Special Capabilities of the PPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 2.13.1Reference Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 2.13.2Single Pulse Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 2.13.3Single Pulse Measurement Using Internal Trigger . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 2.13.4Single Pulse Measurement With an External Trigger . . . . . . . . . . . . . . . . . . . . . . . 2-41 2.14 Swept Peak Power Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42 2.15 Self-Testing the 8500A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 2.16 Frequency Display Disable/Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45 2.17 Non-Volatile Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45 2.17.1Memory Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45 2.18 1018B Peak Power Meter Emulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47 2.18.1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47 2.18.2Initiating the 1018B Emulation Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47 3 Remote Operation_ 3.1Introduction. . . . . . . . . . . . . . . . . . . . . . .

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