Page 1 User Manual 370B Programmable Curve Tracer 070-A838-50 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service.
Page 2 Copyright © Tektronix Japan, Ltd. All rights reserved. Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.
Page 3 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
Page 4 6:00 a.m. – 5:00 p.m. Pacific time This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices.
Page 5 4–10 Controlling the 370B over the bus ........
Page 6: Table Of Contents
....... . 2–28 Figure 3–1: 370B Block Diagram ......
Page 7 ......4–19 Figure 4–7: Data transfers under GPIB control ....4–21 370B User Manual...
Page 8 ........3–4 Table 3–2: Measurements Made by the 370B Display ... . .
Page 9 ........C–6 Table D–1: External inspection check list ..... . D–1 370B User Manual...
Page 10 Table of Contents 370B User Manual...
Page 11 Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. 370B User Manual...
Page 12 WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. The following symbols may appear on the product: WARNING Protective Ground CAUTION High Voltage (Earth) Terminal Refer to Manual 370B User Manual viii...
Page 13 Getting Started...
Page 15 H Digital storage capability that allows a bright and stable display and cursor merriments. The 370B has a mass storage system that consists of non–vola- tile IC memory and a 3.5 inch floppy disk drive. UP to 64 families of characteristic curves and front panel setups can be stored on disk.
Page 16: Table 1-1: Line Voltage Ranges
Performance Check section of the Service Manual. If a discrepancy is found, contact your local Tektronix Field Office or representative. Power source information This instrument operates from a power source having a neutral or near ground (earth) potential.
Page 17: Table 1-2: Power Cord Color Conductor Identification
To select the verification correct operating line voltage: 1. Disconnect the 370B from the ac power source before changing the operating voltage. 2. Select the nominal ac power source voltage with the NOMINAL switch,and 3.
Page 18 Getting Started Table 1-3: Power cord identification Plug configuration Normal usage Option number North America Standard 125 V Europe 220 V United Kingdom 240 V Australia 240 V Switzerland 220 V China 230 V No power cord supplied. 370B User Manual...
Page 19 The 370B is cooled by air drawn in through the air filter on the rear panel and blown out through holes in the side panels. For proper instrument cooling, provide adequate clearance on the rear and sides of the instrument to ensure free air flow and dissipation of heat away from the instrument.
Page 20 CAUTION. Double–wide test adapters are designed to fit in the left set of adapter connectors. If you try to forcibly install a double–wide test adapter in the right side, you might damage the connector. The connectors are identified by the following numbers: A1006 A1007 A1009 A1010 370B User Manual...
Page 21: Figure 1-1: Example Of Kelvin Sense Connection
Sense terminal senses the voltage. By using the Kelvin sense mechanism, you can make a high precision measurement because the effect of conductance from Sense terminals in the 370B adapter connector and the A1001 through A1005 test adaptors are for Kelvin sensing. The measurement can be performed without Sense terminals, however, if you need high precision measurement, use the those terminals.
Page 22: Figure 1-2: Location Of The Rackmount Latch Release
370B into the rack. Once the 370B is installed in a rack, use care that when extended, the 370B does not tip the rack forward, causing personal injury or instrument damage.
Page 23: Figure 1-3: Rackmount Hole Spacing
When rackmounting the 370B, take note of the following: Allow one inch clearance above and below, and on the left and right sides of the 370B for air circulation. Allow at least three inches of clearance between the 370B rear panel and the rack enclosure for adequate cooling air and to provide cable clearance.
Page 24: Figure 1-5: Rackmounting Hardware
The front lip of the stationary track section must mount in front of the front rail to allow the 370B spring latch to function properly. The slide–out tracks consist of two assemblies, one for each side of the instrument.
Page 25: Figure 1-6: Mounting Stationary Rackmount Sections
4. After mounting the instrument in the slide–out tracks, adjust for proper width by loosening the front and rear screws and allowing the slides to seek the proper width. Center the instrument, then tighten the screws. Figure 1-6: Mounting Stationary rackmount Sections 1-11 370B User Manual...
Page 26 7. Once the instrument is out of the rack, press the latch release and push the instrument back into the rack. Rackmount to Cabinet To convert the 370B rackmount version to a cabinet model, use the following Conversion procedure (see Figure 1–7): 1.
Page 27: Figure 1-7: Cabinet To Rackmount Conversion
Getting Started Cabinet to rackmount To convert the 370B cabinet model to a rackmount version, use the following Conversion COnversiOn procedure (see Figure1–7 ) Figure 1-7: Cabinet to Rackmount Conversion 1. Remove the bracket from each comer on the rear panel.
Page 28 If the instrument is shipped to a Tektronix Service Center for service or repair, attach a tag to the instrument showing the following information:...
Page 29 Operating Basics...
Page 31 Controls and Connectors All controls, indicators and connectors required for manual operation of the 370B are located on the front and rear panels of the instrument. In addition, readout of the controls and measurement functions is provided on the CRT.
Page 32: Figure 2-1: Instrument Power And Crt Controls
ON; press again for OFF. An indicator in the switch glows green when the switch is on and black when it is off. GROUND. The Ground connections allows external access to ground reference. INTENSITY. The INTENSITY controls consist of NON STORE/STORE/VIEW, REF, and READOUT/CURSOR. 370B User Manual...
Page 33 These adjustments do not affect the acquired curve data accuracy. TRACE ROTATION.The TRACE ROTATION is adjusted with a screwdriver to adjust the horizontal trace alignment. It is not necessary to make this adjustment a second time during normal operation. 370B User Manual...
Page 34: Figure 2-2: Measurement, Acq, Mode, And Mag Controls
Auxiliary Supply always provide power regardless of the SINGLE function. Pressing the SINGLE button while holding down the FAST/SHIFT button changes the button function to USER REQUEST, which causes the 370B to send a service request (SRQ) signal over the bus. This alternate function is not printed below the SINGLE button.
Page 35 MAG X10. The MAG X10 control vertically and horizontally magnifies NON STORE and STORE curve displays by a factor of 10. The MAG function does not affect VIEW and REF curves. 370B User Manual...
Page 36: Figure 2-3: Memory Index And Setup Controls
RECALL/DIRECTORY Figure 2-3: Memory Index and Setup Controls The mass storage system of the 370B consists of non-volatile IC memory and 3.5-inch floppy disk drive that store characteristics curves and front panel setups. The Memory Index display indicates the memory location that identifies where curves or setups are stored in the mass storage.
Page 37: Table 2-1: Front Panel Controls Settings Not Stored
RECALL/DIRECTORY. The RECALL control recalls a previously-stored group of 370B front panel settings. When RECALL is pressed, the 370B is set to the front panel settings stored in the mass storage. SETUP ID number is displayed at the bottom center of the CRT for about five seconds and is then automatically erased.
Page 38: Figure 2-4: Display Controls
STORE/CAL OFF. The STORE/CAL OFF control displays digital curves on the CRT. Pressing the STORE button while pressing the FAST/ SHIFT button changes the button function to CAL OFF, which cancels the CAL FULL and CAL ZERO functions. 370B User Manual...
Page 39 16 when the memory position for identifier number 80 is reached, the copying of the curves is completed when all the curves are copied. In this case, all the contents stored into IC memory will not be 370B User Manual...
Page 40 NOTE. When copying, the 370B does not accept any type of interrupt. ENTER. The ENTER control stores the currently displayed STORE or VIEW curves in the mass storage.
Page 41: Table 2-2: Configuration Mode Horizontal Voltage
Operating Basics NOTE. When copying, the 370B does not accept any type of interrupt. HORIZONTAL. The HORIZONTAL control selects horizontal deflection factors (VOLTS/DIV) and horizontal sources (COLLECTOR, BASE/EMITTER or STEP GEN). A full clockwise knob rotation does the following: H Selects COLLECTOR voltage source...
Page 42 IC memory. If the INVERT button is not pressed within a few seconds after pressing the INVERT and FAST/SHIFT buttons, the erase operation is canceled. This alternate function is not printed below the INVERT button. 2-12 370B User Manual...
Page 43: Figure 2-5: Cursor And Position Controls
The point at which the f LINE cursor intercepts the horizontal axis is indicated in the CURSOR (f:intercept) area of the readout, giving the horizontal coordinate value. The f LINE cursor can be used to measure the “on” resistance or horizontal intercept voltage of the device. 2-13 370B User Manual...
Page 44 Pressing the ENTER button while holding down the FAST/SHIFT button changes the button function to TEXT, which places the 370B in the Text Edit Mode. The Text Edit mode provides text entry to the Text Area of the display and revision of existing text.
Page 45 Simultaneously pressing the up and down Position Control buttons cancels vertical display offset. Simultaneously pressing the left and right Position Control buttons cancels horizontal display offset. The Position Control buttons are also used to edit the CRT text. 2-15 370B User Manual...
Page 46: Figure 2-6: Step Generator Controls
STEP MULTI. 1X. The STEP MULTI.1X control reduces the step signal amplitude by a factor of ten without affecting the offset amplitude. The indicator above the STEP MULTI . 1 X button lights when the Step Multi function is enabled. 2-16 370B User Manual...
Page 47 Collector Supply POLARITY settings, CONFIGURATION, and the INVERT setting. Pressing INVERT reverses the step generator output polarity. The LED next to the INVERT button indicates if the inverted state is selected. When the configu- 2-17 370B User Manual...
Page 48: Table 2-3: Step Generator Polarity
COLLECTOR SUPPLY CONFIGURATION mode setting setting POLARITY BASE COMMON EMITTER COMMON + (INVERT OFF) + DC - (INVERT ON) + LEAKAGE - (INVERT OFF) - DC + (INVERT ON) - LEAKAGE + (INVERT OFF) - (INVERT ON) 2-18 370B User Manual...
Page 49: Figure 2-7: Collector Supply Controls
LOOPING COMPENSATION LIMITER Figure 2-7: Collector Supply Controls WARNING. When using the 370B at high power settings, the device, fixture, or protective cover may become hot enough to cause injury. Avoid touching any of these items until cooled. Dangerous voltage may appear at the front panel connector and base terminals.
Page 50: Table 2-4: Max Peak Power Vs. Series Resistors
H AC: Selecting the ac polarity applies a sinusoidal voltage to the collector or base terminals. The step generator output is positive-going. 2-20 370B User Manual...
Page 51: Table 2-5: Collector Supply Polarity Functions
% of COLLECTOR PEAK VOLTS area of the display as a percent of MAX PEAK VOLTS. NOTE. When the 370B is in DC mode, and the Variable Collector Supply is rotated quickly from 100% to 0%, or the OUTPUT is switched to DISABLED, a “bounce”...
Page 52: Figure 2-8: Aux Supply, Gpib Controls, Fast/Shift, And Floppy Disk Drive
When the 370B is under remote control, the REMOTE LED indicator illumi- nates. Pressing the LOCAL button while holding down the FAST/SHIFT button causes the 370B to read the GPIB address and message terminator selections on the 2-22 370B User Manual...
Page 53 Pressing the HARDCOPY button while holding down the LOCAL ADDR button causes the 370B to converts the waveform to CSV file format and save it into the floppy disk. FAST/SHIFT. .Hold down the FAST/ SHIFT button while pressing any of the Position Control buttons to increase the rate of change.
Page 54: Table 2-6: The Fast/Shift Button Used With Other Buttons
Effect of Pressing the FAST/SHIFT button SINGLE Changes the button function to USER REQUEST, which causes the 370B to send a service request (SRQ) signal over the bus. This alternate function is not printed below the button. MEMORY Increases or decreases the rate of change of the Memory index number.
Page 55: Figure 2-9: Signal Output Controls And Connectors, Configuration Controls And Indicators, And Input Connector
Adapter Connector. The Adapter Connector allows the connection of various test adapters. LEFT, RIGHT and STANDBY. LEFT, RIGHT and STANDBY controls select the device to be tested (left or right). STEP GEN OUT. The Step Generator signal is available at this terminal. 2-25 370B User Manual...
Page 56 0%. When either BASE SHORT (EMITTER) or BASE COLLEC- TOR SUPPLY is selected, the output and readout display of the Step Generator is disabled. Also the STEP AMPLITUDE, OFFSET, VOLTAGE, and CUR- RENT control s are disabled. 2-26 370B User Manual...
Page 57: Figure 2-10: Rear-Panel Controls And Connectors
PRINTER INTERFACE PORT. The PRINTER INTERFACE PORT interfaces to a Printer. AC INPUT. The AC INPUT provides the connection point for the as power source to the instrument. The LINE FUSE Holder contains the ac power–source fuse. 2-27 370B User Manual...
Page 58: Figure 2-11: Readout Display
AUX Supply Voltage Display Offset Figure 2-11: Readout Display The 370B CRT has an internal printed graticule and characters (VERT/DIV. HORIZ/DIV, etc.) for internal setups. GRAT ILLUM controls the brightness of the graticule and printed characters. Figure 2–11 illustrates the screen readout areas. The types of readout information...
Page 59 Text. The text message can be written on the top of the CRT graticule area to identify the stored curves or front panel settings. No more than 24 characters can be written in the text area. The 370B recognizes lower case u as m and displays the Greek letter “u” instead.
Page 60 Operating Basics 2-30 370B User Manual...
Page 61 Reference...
Page 63 Reference This section provides the following information: H General description of instrument operation H First time operation H General operating information H Measuring examples 370B User Manual...
Page 64: Figure 3-1: 370B Block Diagram
Reference General Description of Instrument Operation The 370B is a microprocessor-controlled semiconductor tester that displays and allows measurement of both static and dynamic semiconductor characteristics obtained under simulated operating conditions. The Collector Supply and Step Generator produce voltages and currents that are applied to the device under test.
Page 65 This sequence takes about 5 seconds. If the Power-on Diagnostics detect no error, the message “SELFTEST PASS” is displayed on the error message area of the CRT. The 370B then configures to the default setup. Table 3–1 lists the default conditions of the 370B. The CRT controls and LOOPING COMPENSATION control are not set at power-up.
Page 66: Table 3-1: Default Setup
GPIB LOCAL/REMOTE LOCAL (LED OFF) AUX SUPPLY 0.00 V COLLECTOR SUPPLY MAX PEAK VOLTS MAX PEAK POWER WATTS 0.08 POLARITY VARIABLE COLLECTOR SUPPLY 0.0 % CONFIGURATION BASE = STEP GEN, EMITTER = COMMON LEFT RIGHT STANDBY STANDBY 370B User Manual...
Page 67 This changes the STORE button function to CAL OFF. 7. Press the Display INVERT button. 8. Observe that the dot is displayed in the upper right corner of the display graticule. 9. Press the Display INVERT button again to resume normal operation. 370B User Manual...
Page 68 1. Install the axial lead adapter (A1005) into the right-hand set of adapter Sensitivity connectors. 2. Install a 1 kW, 1/2 watt resistor in the axial lead adapter and close the plastic protective cover. 3. Reset the following 370B controls: DISPLAY VERTICAL 1 mA HORIZONTAL 1 V COLLECTOR 4.
Page 69: Figure 3-2: Display Of I Vs. E For 1 K Resistor
3. Replace the resistor in the axial lead adapter with a silicon diode. Connect the diode to the axial lead adapter . Close the protective cover. 4. Observe that the Memory Index is set to 1, then press the Setup RECALL button. 370B User Manual...
Page 70: Figure 3-3: Display Of Signal Diode Forward-Bias Characteristics
Reference 5. Set the 370B controls as follows: LEFT RIGHT STANDBY RIGHT VERTICAL CURRENT/DIV To appropriate values and (depending on the HORIZONTAL VOLTS/DIV forward current and forward voltage rating of the diode). CONFIGURATION BASE = SHORT (EMITTER), EMITTER = COMMON 6.
Page 71: Figure 3-4: Display Of Signal Diode Reverse-Bias Characteristics
Reference 12. Change the 370B settings as follows: Cursor Mode Collector Supply POLARITY + DC 13. Adjust the trace intensity and turn the VARIABLE COLLECTOR SUPPLY control clockwise. Note that the display of the forward voltage diode characteristic is now a spot which indicates, the current conducted by the diode and the voltage across the diode.
Page 72: Figure 3-5: Adjustment Of Looping Compensation Control
Close the protective cover. Figure 3-5: Adjustment of LOOPING COMPENSATION control 21. Observe that the Memory Index is set to 1, then press the Setup RECALL button to initialize the 370B. 370B User Manual 3-10...
Page 73: Figure 3-6: Display Of Zener Diode I Vs. E Characteristic
Reference 22. Change the 370B settings as follows: LEFT RIGHT STANDBY RIGHT Collector Supply POLARITY VERTICAL CURRENT/DIV and To appropriate values for the breakdown HORIZONTAL VOLTS/DIV of the Zener diode. CONFIGURATION BASE = SHORT (EMITTER) EMITTER = COMMON 23. Set the OUTPUTS breaker to the ENABLED position.
Page 74: Figure 3-7: Measuring Breakdown Voltage With The Dot Cursor
3. Place an NPN silicon transistor into the right transistor test socket of the transistor adapter. 4. Close the protective cover. 5. Observe that the Memory Index is set to 1, then press the Setup RECALL button to initialize the 370B. 370B User Manual 3-12...
Page 75 Reference 6. Set the 370B controls as follows: LEFT RIGHT STANDBY RIGHT VERTICAL CURRENT/DIV About 1/10 of the rated collector current. HORIZONTAL VOLTS/DIV 1 V COLLECTOR 7. Set the OUTPUTS breaker to the ENABLED position. 8. Turn the VARIABLE COLLECTOR SUPPLY control clockwise until the peak collector-emitter voltage is about 10 volts.
Page 76 Reference Figure 3-8: I vs. V for 10 steps of base current 15. Change the following 370B settings: Display Mode STORE MEASUREMENT REPEAT Step Generator PULSE LONG 16. Note that the collector supply is in the DC mode and that the steps are displayed as a diagonal array of dots on the CRT screen.
Page 77: Figure 3-9: Ic Vs. Vbe For 10 Steps Of Base Current
20. Set the VERTICAL control counterclockwise to STEP GEN and the HORIZONTAL control clockwise to 1 V COLLECTOR. Note the display of the base current (one step per vertical division) vs the collector-emitter voltage (see Figure 3–11). 21. Set the OUTPUTS breaker to the DISABLED position. 370B User Manual 3-15...
Page 78 24. Change the Memory Index to 1, then press the Setup RECALL button to initialize the 370B. Figure 3-11: I vs. V 25. Set the 370B controls as follows: LEFT RIGHT STANDBY RIGHT VERTICAL CURRENT/DIV About 1/10 of the rated drain current...
Page 79 30. Remove the FET test adapter and replace it with the A1007 transistor test adapter (with the transistor still installed). 31. Close the protective cover. 32. Making sure that the Memory Index is set to 1, press the Setup RECALL button to initialize the 370B. 370B User Manual 3-17...
Page 80 Reference 33. Set the 370B controls as follows: LEFT RIGHT STANDBY RIGHT VERTICAL CURRENT/DIV About 1/10 of the rated collector current HORIZONTAL VOLTS/DIV 1 V COLLECTOR Collector Supply Within the power dissipation rating of the MAX PEAK POWER WATTS transistor 34.
Page 81 Reference Figure 3-13: Measuring h with the Dot cursor Figure 3-14: Measuring h with the Window cursor 43. Change the following 370B settings: Cursor Mode VOLTAGE Step Generator NUMBER OF STEPS Output Mode VOLTAGE STEP AMPLITUDE 100 mV 370B User Manual...
Page 82 Connect a patch cord with banana plugs on each end between the STEP GEN OUT connector and the EXT BASE or EMITTER IN connector. 4. Close the protective cover. 5. Change the following 370B setting: CONFIGURATION BASE = OPEN (EXT) EMITTER = COMMON 6.
Page 83 Reference 8. Close the protective cover. 9. Change the following 370B settings: Collector Supply POLARITY + LEAKAGE VERTICAL CURRENT/DIV 1 nA EMITTER 10. Set the OUTPUTS breaker to the ENABLED position. 11. Turn the VARIABLE COLLECTOR SUPPLY control clockwise and note the emitter leakage current display with the base terminal open.
Page 84 15. 21. Set the OUTPUTS breaker to the DISABLED position, then open the protective cover. Remove the patch cord. 22. Close the protective cover. 23. Change the following 370B settings: CONFIGURATION BASE = COLLECTOR SUPPLY EMITTER = COMMON...
Page 85 11. Set the OUTPUTS breaker to the DISABLED position. 12. Change the Memory Index setting to 1 and press the Setup RECALL button to initialize the 370B settings. 13. Observe that the entered text is cleared from the display. 14. Change the Memory Index number back to 3 then press the Display VIEW button.
Page 86 Reference ACQ Mode (STORE Mode) 1. Change the Memory Index number to 1 , then press the Setup RECALL button to initialize the 370B. 2. Set the 370B controls as follows: LEFT RIGHT STANDBY RIGHT VERTICAL CURRENT/DIV About 1/10 of the rated collector current...
Page 87 Format only new disks or disks whose contents you do not want to keep. 4. Set the Memory Index number to 2, then press the Setup RECALL button. Observe that the I –V characteristic curves are displayed. 5. Change the Memory Index number to 17. 370B User Manual 3-25...
Page 88 8. Set the OUTPUTS breaker to the DISABLED position. 9. Change the Memory Index number to 1, then press the Setup RECALL button to initialize the 370B. 10. Change the Memory Index number back to 17, then press the Display VIEW button.
Page 89 If the Display INVERT button is pressed during this interval, the non-vola- tile IC memory is erased and the message “ERASE COMPLETE” is displayed. If the Display INVERT button is not pressed, the erase function is canceled and the message “ERASE CANCELED” is displayed. 370B User Manual 3-27...
Page 90 Reference General Operating Information The 370B CRT has a permanently-etched, 10 x 10 internal graticule. Illumina- tion of the graticule is controlled by the GRAT ILLUM control. A protective shield for the CRT is fitted between the bezel and the CRT.
Page 91 The vertical sensitivity can be increased by 10 times for any of the previously mentioned measurements by setting the MAG control to X 10. The magnified vertical deflection factor is indicated by the VERT/DIV readout. NOTE. The VERT/DIV readout does not indicate deflection factors less than 100 pA/division. 3-29 370B User Manual...
Page 92: Table A-2: Step Generator
The horizontal deflection factor can be increased by 10 times for any of the previously mentioned measurements by setting the MAG control to X10. The magnified horizontal deflection is indicated by the HORIZ/DIV readout. 3-30 370B User Manual...
Page 93: Table 3-2: Measurements Made By The 370B Display
The 370B has three measurement modes: Repeat, Single, and Sweep. Repeat: Repeat mode is the measurement mode automatically selected when 370B is powered up or initialized. In Repeat mode, the Collector Supply and Step Generator output are continuous. Single: In Single mode, a set of staircase waves or pulse signal is output by the Step Generator each time the Measurement SINGLE button is pressed, while the Collector Supply is output continuously.
Page 94 SHORT or LONG (except when the Collector Supply POLARITY is set to AC) When the 370B Collector Supply Polarity is set to + or –, it supplies a sweeping voltage to the device under test. This sweep is a 60 Hz sine wave. Driving the device with a sweep is a convenient way to observe all points along the characteristic curve;...
Page 95 Reference Step Generator Sweep mode sweeps the Step Generator output from its peak value (step amplitude + offset) to offset value when the 370B is set as follows: HORIZONTAL VOLTS/DIV BASE/EMITTER or STEP GEN range Step Generator NUMBER OF STEPS...
Page 96 POWER WATTS buttons, the proper series resistor is automatically selected. Figure 3-21: Different Collector Supply Outputs. The Collector Supply POLARITY controls determine the polarity and the type of the Collector Supply output. They also provide an initial display position on 3-34 370B User Manual...
Page 97 Figure 3-22: Display Looping Interlock System The 370B uses an interlock system. To use the 370B, the plastic protective cover must be installed over the adapter connectors. When the protective box is in place and the lid closed, the red WARNING indicator turns on. The red WARNING indicator indicates that the Collector Supply is enabled and that a dangerous voltage may appear at the front panel terminals.
Page 98 AID button is pressed is displayed at the OFFSET READOUT. Pressing the OPPOSE button allows either current or voltage to be subtracted from the Step Generator output, the amount subtracted from the Step Generator output is displayed at the OFFSET READOUT. 3-36 370B User Manual...
Page 99 Pulsed Offset mode should be used. DC Offset. Base line offset voltage is always applied to the DUT in spite of Step Generator mode and the Measurement Mode setting. The Pulse Offset is the default mode. 3-37 370B User Manual...
Page 100 These connectors allow two devices to be set up at the same time for comparison testing. The LEFT-RIGHT-STANDBY control determines which device is under test. The 370B test adapters may be plugged into the adapter connectors. These adapters provide sockets into which devices with various lead arrangements may be placed for testing.
Page 101: Table 3-3: Polarities Of The Collector Supply And Step Generator Output
ENVELOPE. In AVERAGE mode, acquired curves are averaged and displayed on the CRT after calculation. A running count of the acquisition is displayed on the CRT. After the acquisition count exceeds 16, the 370B continues the averaging but acquisition count stops incrementing. 3-39...
Page 102 Enveloping is useful for revealing subtle variations in signals and allows the 370B to be left unattended for a long period of time while monitoring signals for time and amplitude variations such as thermal drift.
Page 103 BMP File. When the HARDCOPY/BMP FILE button is pressed while holding the FAST/SHIFT button, the 370B initiates making BMP file of the current screen curve image into the floppy disk. The BMP file can be made when the instru- ment is in Store mode only.
Page 104 It is extremely important to place the floppy disks back in their cases for long-term storage. It is also very important to attach the index label at the correct position. 3-42 370B User Manual...
Page 105 Memory Index Display. When the track number reaches 79 and formatted is completed, the message “FORMAT END” is displayed at the bottom left of the CRT, and the 370B returns to the normal operating mode. NOTE. During disk formatting, the 370B will not accept any interrupts.
Page 106 17 to 80 for the floppy disk. 4. Text This indicates the text stored together with front panel settings or characteris- tic curve. 5. Asterisk An asterisk before the index number means that the file is stored in non-volatile IC memory. 3-44 370B User Manual...
Page 107 Non Store Mode The 370B also has a Non Store display mode. In this mode the characteristic curve data is not stored in main memory but displayed directly on the screen.
Page 108 Text Editing Text, consisting of letters, numbers, and symbols, can be displayed at the top of the 370B CRT graticule. The text may be used to label characteristic curves with identification information or to note measurement conditions. The text is stored in mass storage along with the characteristic curve or setup information.
Page 109 Pressing the NON STORE, STORE, VIEW, RECALL, or Position DISPLAY button in Text Edit mode causes the 370B to exit Text Edit mode, erase the text data entered so far, and display the “TEXT CANCELED” message.
Page 110 Reference The firmware will be loaded and the 370B will restart automatically with the new firmware. It will take about one minute to complete the upgrade. 5. Remove the floppy disk when you are done with the firmware upgrade. 3-48...
Page 111 Also included is a list of common measurements that may be made on the given devices with the 370B and a brief set of instructions on how to make each of these measure- ments.
Page 112 Reference Figure 3-25: Bipolar Transistor Common emitter Configuration Figure 3-26: Bipolar Transistor Family of Curves 370B User Manual 3-50...
Page 113 Collector-emitter leakage current and collector-emitter breakdown voltage (with a specified resistance between the base terminal and the emitter terminal) are measured the same as I and BV except that a specified resistance is connected between the base terminal and the emitter terminal. 370B User Manual 3-51...
Page 114 I and BV , except that the CONFIGU- RATION is set to COLLECTOR OPEN and the Collector Supply POLAR- ITY is set to inverted polarity. Figure 3-28: Bipolar Transistor Curve 370B User Manual 3-52...
Page 115 BV Collector-base leakage current and collector-base breakdown voltage (emitter open) is measured the same as I and BV , except that the CONFIGU- RATION is set to EMITTER OPEN (EXT). 370B User Manual 3-53...
Page 116 STEP GENERATOR Enhancement POLARITY INVERT POLARITY INVERT Not inverted Inverted STEP GENERATOR OFFSET with Enhancement Depression POLARITY INVERT b tton pressed POLARITY INVERT button pressed OPPOSE ZERO or AID Figure 3-31: Common source FET Configuration Diagram 370B User Manual 3-54...
Page 117 Set the CONFIGURATION to BASE SHORT (EMITTER) 370B User Manual 3-55...
Page 118 Less than maximum power rating of device. COLLECTOR SUPPLY POLARITY PULSE Set to LONG or SHORT when using high gate voltage or current CONFIGURATION EMITTER COMMON BASE STEP GEN Figure 3-33: Silicon controlled Rectifier Configuration Diagram 370B User Manual 3-56...
Page 119 Reverse Blocking Voltage The reverse blocking voltage is measured the same way as the forward blocking voltage, except that the Collector Supply POLARITY is set to – 370B User Manual 3-57...
Page 120 Signal Diode and Control Required Setting Rectifying Diodes HORIZONTAL COLLECTOR MAX PEAK POWER WATTS Less than maximum power rating of device. COLLECTOR SUPPLY POLARITY CONFIGURATION EMITTER COMMON BASE SHORT Figure 3-35: Diode Configuration Diagram Figure 3-36: Diode Curve 370B User Manual 3-58...
Page 121 Supply POLARITY to – LEAKAGE. Zener Diode Control Required setting HORIZONTAL COLLECTOR MAX PEAK POWER WATTS Less than maximum power rating of device. COLLECTOR SUPPLY POLARITY CONFIGURATION EMITTER COMMON BASE SHORT Figure 3-37: Zener Diode Configuration Diagram 370B User Manual 3-59...
Page 122 Current and voltage in the forward direction are measured in the same manner as in the reverse direction, except that the Collector Supply POLARITY is set to + . For a display of currents and voltages in both directions, set the POLARITY to AC. 370B User Manual 3-60...
Page 123 GPIB...
Page 125 GPIB This section provides the following information: H Review H Interface capabilities H Setup H Controlling the 370B over the bus 370B User Manual...
Page 126 A typical GPIB system will include a controller and one or more instruments, such as the 370B Curve Tracer. Some instruments are talk-only or listen-only devices while others can both talk and listen. The 370B does both. Linking a controller to the 370B, and possibly other instruments, provides operation in four...
Page 127 30. The controller uses this address to set an instrument to talk or listen. Sending Data and Commands. Device-dependent messages carry commands and data from the controller to the 370B and return instrument status information and measurement data. The ATN line (pin 11 of the GPIB) is asserted while interface messages are sent to distinguish them from device-dependent messages.
Page 128 As noted before, the content and format of these messages has been addressed with Tektronix Codes and Formats. All of these message types are significant for the 370B.
Page 129 GPIB Transmitting and Receiving Data. Most instruments talk (send data) or listen (receive data) to the system controller. The 370B does both. In fact the 370B sends and receives two classes of data: instrument setups and measurement results. There are various ways of coding such data. The 370B, in keeping with...
Page 130: Table 4-1: Gpib Interface Specifications
Due to the set of interface functions required for the 370B, not all of the possible interface messages would be meaningful. The 370B does not respond to the...
Page 131 SDC. Go To Local (GTL). The Go To Local (CTL) message (ASCII “Control A”, decimal 1) returns the 370B to the front panel and turns off the front panel REMOTE indicator, just as the front panel LOCAL button does.
Page 132 (ASCII Control Y, decimal 25) switches the 370B back to normal operation. End or Identity (END or EOI). The 370B or controller sets End Or Identify (EOI) simultaneously with the last byte of the command or data if LF (line feed) /EOI is currently selected as the message terminator.
Page 133 1024 digitized points representing the displayed curves. These binary-coded numbers are interpreted by the controller. Two other types of data that can be read out of the 370B are: the coordinates of a cursor located on the curves, and the text shown in the text–display area of the screen.
Page 134 Powering up These steps are discussed in the following paragraphs. Configuration Switch The 370B has a configuration switch bank on the rear panel which is used to set Settings the bus address and message terminator (see Figure 4–3). Figure 4-3: Rear panel configuration switch Setting the Bus Address.
Page 135 The two most common terminators are the EOI (end or identify) signal line and the LF (line feed) character. If EOI is selected, the 370B will assert the EOI line simultaneously with the last data byte when sending a message, and will recognize the EOI line as the terminator when receiving a message.
Page 136 “on-line”. Self Test. To turn on the 370B, press the front panel POWER switch. The 370B performs a self-test at power-up and initializes itself to a pre-defined state, after which it’s ready to make measurements.
Page 137 The following examples show command strings for two controllers and a representative language for each. The first is an IBM PC with a Tektronix GURU card (or National Instruments model PC2 or PC2A card) running BASICA. The second is a Hewlett Packard 200 or 300 Series Scientific Computer running Series 200 or 300 BASIC.
Page 138: Table 4-2: Controller Output Syntax
GPIB A useful addressing variation assigns the 370B address to a variable and uses that variable in place of the specific numeric address. In the following examples, the address is set to “6”. This method works for both the example controllers...
Page 139: Table 4-3: Controller Input Syntax
710,S$ Instrument Setup Over the One popular use of the GPIB with the 370B is to store front panel settings for later recall. These stored settings are then used to set up the curve tracer for repeating specific tests. This is accomplished by using a query command to acquire from the 370B an ASCII string representing the front panel setup.
Page 140 Be sure that the resulting string meets the syntax requirements of the 21 individual commands making up the whole and that they are in the proper sequence. See the 370B GPIB COM- MANDS portion of this section for details.
Page 141 One way to remind the operator what needs to be done is to send a message using the text display area of the 370B screen. Send an appropriate message of up to 24 characters using the TEXt <string>...
Page 142 Together with the preamble it fully describes the displayed curve. Acquiring Data Within the 370B. To acquire data, set the display function to Store mode . The command to do this over the bus is DISplay STOre. At this point the current set of parameters are recorded and the curves being shown are digitized.
Page 143 Transferring the Waveform to Mass Storage. Another possibility for storing data under control of the bus is to put the waveform into a mass-storage waveform- storage location. Use the ENTer <NR1> command, where the number, <NR1>, is the storage location index. 4-19 370B User Manual...
Page 144 WFID INDEX portion of the string (see WFMpre in the Command List portion of this section for details). Loading the Curve. When sending display data to the 370B, the target is the mass storage location set by the preceding preamble transfer.
Page 145 Transfers they differ in content and format. There are a number of ways to move these various kinds of data from place to place, as shown in Figure 4–7. 370B CURVE TRACER Figure 4-7: Data transfers under GPIB control 4-21...
Page 146 Command Message Commands for the 370B Curve Tracer, like those for other Tektronix GPIB Formats instruments, follow the conventions of the Tektronix Standard Codes and Formats.
Page 147 GPIB The following are all valid versions of the INIt command, which resets the 370B to the initial state following power-up. INrr Init init inIT The Command List portion of this section describes all the 370B commands and queries. In the Command List, the elements of each command and query are listed in tabular format.
Page 148 Do not put a space between the last character of the key word and the question mark. Queries for the 370B need only the header and question mark, though the response will usually be more involved.
Page 149: Table 4-4: Numeric Argument Formats
-12.3 E -2, .005E-6, 0.000E-3, scientific notation 6.7E+4, 2.35E-3, 0.E0, 125E-6 Generally: An <NR1> argument must be sent to the 370B in that format (i.e., without a decimal point). An <NR2> argument may be sent to the 370B in either <NR2> or <NR1> format.
Page 150 ASCII strings. As mentioned before, the only device-dependent messages not sent as ASCII strings are the binary data used for curves. All other messages, both to and from the 370B, are ASCII strings made up of numbers or key words pertaining to the applicable parameters.
Page 151 2 for the 10 bits of the X coordinate and 2 for the 10 bits of the Y coordinate: XXYYXXYY . . . XXYY And finally there is one byte which is the checksum for the preceding 4098 data bytes. 4-27 370B User Manual...
Page 152: Table 4-6: Front Panel Control Commands And Queries
GPIB 370B GPIB Commands 370B GPIB commands are divided into three classes, the front panel control commands, display data and CRT readout I/O commands, and the system commands. Each class has several command groups, sorted by function. Front Panel Control...
Page 153 Configuration Command Group CONFIGURATION CONFIG Measurement Command Group REPEAT MEASURE SINGLE MEASURE SWEEP MEASURE Other Commands ACQ MODE ACQUIRE RECALL RECALL SAVE SAVE PLOT PLOT AUX SUPPLY LEFT RIGHT STANDBY SWITCH LRSSW PROTECTIVE COVER COVER? OUTPUTS OUTPUTS? 4-29 370B User Manual...
Page 154: Table 4-7: Display-Data And Crt Readout I/O Commands And Queries
TEXT? Requests text messages from 370B System Commands and The 370B device-dependent message units set and return parameters of the Queries controller in a GPIB system. These commands and queries are listed in Table 4–8 and described in two groups, related to instrument parameters, and status and error reporting.
Page 155 Returns error condition reported in last status byte Command List Tables 4–9 through 4–11 list all 370B GPIB commands and queries. The first column lists the name or header of the command. The second column lists arguments associated with the command. The third column lists link arguments associated with the first argument.
Page 156: Table 4-9: Front Panel Controls
COLLECT <amp> ::= {1.0E-6 - 2.0E+0} (COLLECTOR POLARITY not leakage mode) COLLECT <amp> ::= {1.0E-9 - 2.0 E-3} (COLLECT POLARITY leakage mode) OFFset <NR2> Sets vertical display offset VERT OFFSET :<val> <val> ::= +/- 10.0 by 0.1 4-32 370B User Manual...
Page 157 Sets the f Line cursor intercept position on the display. LINE <data1>, <data2> <data1> :== horizontal position {0 - 1000} <data2> :== vertical position {0 - 1000} LINe? Response with the f LINE cursor intercept position: LINE <NR1>, <Nr 2> 4-33 370B User Manual...
Page 158 <mode> ::= PLE|PDC|PNO|AC|NNO|NDC|NLE NNOrmal PLE ::= +LEAKAGE, PDC ::= +DC, NLEakage PNO ::= +(fullwave), AC ::= AC, NNO ::= -DC, NLE ::= -LEAKAGE CSPol? Reports collector supply polarity and mode: CSPOL <mode> <mode> ::= PLEAKAGE|PDC|PNORMAL|AC|NNORMAL| NDC|NLEAKAGE 4-34 370B User Manual...
Page 159 INVERT:<invert>, MULT:<mult>,<amp> <num> ::= number of steps (NR1) <pulse> ::= pulse mode (OFF|SHORT|LONG) <offset> ::= step generator offset (NR2) <invert> ::= step generator invert mode (ON|OFF) <muit> ::= step generator ,1X mode (ON|OFF) <amp> ::= CURRENT:amps/step|VOLTAGE:volts/step 4-35 370B User Manual...
Page 160 Recall front panel setup data in the memory location stated by argument. RECALL <index> <index> ::= 1|2|...|80 SAVe <NR1> Store the displayed setup data in the memory location stated by argument. SAVE <index> <index> ::= 1|2|...|80 4-36 370B User Manual...
Page 161 COVer? Reports protective cover status. COVER ON|OFF ON for cover closed OFF for cover open OUTputs? Reports with the OUTPUT breaker status. OUTPUTS ENABLED|DISABLED ENABLED ::= OUTPUTS breaker is enabled. DISABLED ::= OUTPUTS breaker is disabled. 4-37 370B User Manual...
Page 162: Table 4-10: Display Data And Crt Readout I/O
<y multi> ::= <NR3>= vertical scale factor <y off> ::= <NR1>= vertical scale offset <format> ::= VECTOR|DOT|SWEEP <num><num> ::= number of steps + 1 WFMpre NR.PT <NR1> Sets input points number from curve command (1 to 1024) 4-38 370B User Manual...
Page 163 Table 4-10: Display Data and CRT Readout I/O (Cont.) Command Argument Link Definition WFMpre? When WFMpre? is received, 370B reports waveform preamble data: WFMPRE WFID:<Wfid>,ENCDG:BIN, NR.PT:<point>, PT.FMT:XY, XMULT:<x multi> ,XZERO:0, XOFF:<x off>,XUNIT:V, YMULT:<y multi>,YZERO:0, YOFF:(y off>,YUNIT:A,BYT/NR:2, BN.FMT:RP.BIT/ NR:10,CRVCHK:CHKSM 0, LN .FMT:<format>...
Page 164 Response with the b or gm/DIV readout. BGM <para> <para> is <Nr1> TEXt <string> Displayed text on CRT. Text <text>" <text> ::= max. 24 characters TEXT? Reports text on CRT. Text <text>" <text> ::= max. 24 characters 4-40 370B User Manual...
Page 165: Table 4-11: System Commands And Queries
PKPOWER 0.08 CSPOL PNORMAL CONFIG BSGEN 0.00 LRSSW STANDBY LONG DEBUG TESt? Initiates ROM and RAM check routine. TEST ROM: <hex>, RAM <hex> Reports the instrument ID: ID SONY_TEKTRONIX/370B, V81.1, <fwv> <fwv> ::= current firmware version 4-41 370B User Manual...
Page 166 RQS? Reports RQS status. RQS ON|OFF Enables operation complete service request. Disables operation complete service request. OPC? Reports OPC status. OPC ON|OFF EVEnt? Returns detailed information about the event. EVENT <code> <code> ::= See Table XX. 4-42 370B User Manual...
Page 167 A complete list of status bytes that can occur is found in Table 4–12. After polling the 370B for the status byte, the controller can obtain more detailed information about the Service Request event by sending the EVEnt? query. The response to an EVEnt? query is an event code, which is a <NR1>...
Page 168 370B will not assert them until the mask is removed. This masking is accom- plished with the RQS and OPC commands. RQS ON enables the 370B to assert an SRQ when it has an event to report. If this feature is turned off (RQS OFF), up to ten events are still accumulated and can be retrieved with successive EVEnt? queries.
Page 169 Internal error – This status byte indicates that a malfunction has been discovered that could cause the instrument to operate incorrectly. Device–dependent event – This status byte is set when there is an event specific to the 370B. 4-45 370B User Manual...
Page 170 Printer fail Outputs protected Collector Supply short Device Interlock system changed (mask OPC) dependent Event OUTPUTS breaker changed (mask OPC) LEFT RIGHT STANDBY switch changed (mask OPC) Disk format operation complete (mask OPC) Outputs resumed (mask OPC) 4-46 370B User Manual...
Page 171 Appendices...
Page 173 H The 370B Programmable Curve Tracer must have had a warm-up period of at least 20 minutes. H The 370B Programmable Curve Tracer must be operating at an ambient...
Page 174: Table A-1: Collector Supply
Sensitivity is increased 1000 times. DC mode ripple Less than 2 % of output voltage VARIABLE COLLECTOR SUPPLY at 30 % or (no load) higher Less than 0.5 % of output voltage VARIABLE COLLECTOR SUPPLY at 30 % or less 370B User Manual...
Page 175 Red light indicates dangerous voltage is applied to collector or base terminal. Limiting indicator Indicates that internal sensing circuit automatic protection is operating. Looping compensation Range At least 100 pF Cancels stray capacitance between DUT terminal and ground. 370B User Manual...
Page 176 Collector Supply over-dissipation temporarily shuts off the power, and prints a message on the screen. Collector Supply over-current trips the OUTPUTS breaker, prints a message on the screen, and reset the Collector Supply output to 0 %. No damage results when over-dissipation occurs. 370B User Manual...
Page 177 Fall and rise time (typical) Within 25 ms for 1 step or 100 ms for 10 1 kW load, 100 mA/step steps. Overshoot and undershoot Within 10 % of transition amplitude. 1 kW load, 100 mA/step (typical) 370B User Manual...
Page 178 INVERT is disabled. Opposite to Collector Supply Polarity when STEP GENERATOR POLARITY INVERT is selected or CONFIGURATION switch is set to BASE COMMON. BASE COMMON configuration disables STEP GENERATOR POLARITY INVERT. Number of steps Ranges from 0 to 10. 370B User Manual...
Page 179 10 V Load Voltage Step Generator max voltage output, in 2 V/step. 0.01 A, 40 V 40 V 0.2 A, 15 V 0.5 A, 10 V 15 V 10 V 10 mA 0.2 A 0.5 A Load Current 370B User Manual...
Page 180: Table A-3: Aux Supply
Collector/Base Current Range 1 mA/div to 2 A/div in a 1-2-5 sequence. x10 MAG extends maximum sensitivity to 100 nA/div (1 nA resolution). Accuracy (typical) Within 2 % of WINDOW cursor readout + 0.1 x VERT/DIV setting. 370B User Manual...
Page 181 Accuracy Within 1.5 % of offset + 0.1 x VERT/DIV setting Display x10 MAG (typical) Accuracy Within 1.5 % of window cursor readout + 0.3 x VERT/DIV setting. Display Invert (typical) Accuracy Within 0.1 x VERT/DIV setting 370B User Manual...
Page 182: Table A-5: Digital Storage Vertical Acquisition
"10 divisions in 0.1 division resolution Accuracy Within 1.5% of offset +0.06 x VERT/DIV setting Display x10 MAG Accuracy Within 1.5 % of DOT cursor readout +0.3 x VERT/DIV setting Display Invert Accuracy Within 0.04 x VERT/DIV setting A-10 370B User Manual...
Page 183 "10 divisions in 0.1 division resolution. Accuracy Within 1.5 % of offset + 0.1 x HORIZ/DIV setting. Display x10 MAG Accuracy Within 1.5 % of window cursor readout + 0.3 x HORIZ/DIV setting. Display Invert Accuracy Within 0.1 x HORIZ/DIV setting. A-11 370B User Manual...
Page 184 Within 1.5 % of DOT cursor readout + 0.01 x HORIZ/DIV setting. Display x10 MAG Accuracy Within 1.5 % of DOT cursor readout + 0.3 x HORIZ/DIV setting. Display Invert Accuracy Within 0.04 % x HORIZ/DIV setting. A-12 370B User Manual...
Page 185 4 digit Horizontal and Vertical values without x 10 MAG, 5 digit with x 10 MAG. % of COLLECTOR PEAK VOLTS 0.0 % to 100.0 % in 0.1 % step. Aux Supply - 40.00 V to + 40.00 V A-13 370B User Manual...
Page 186 Maximum output current "2 A Aux Supply Connector Maximum output voltageand "40 V at "10 mA, or current "100 mA at "20V Ext Base or Emitter Connector Maximum input voltage "40 V Maximum input current "2 A A-14 370B User Manual...
Page 187 230 VAC 250 V, 2 A, Fast Blow Table A-11: Surge Current Characteristic Description Surge Current 80 A peak (25_C) for x 5 line cycles, after product has been turned off for at least 30 S. A-15 370B User Manual...
Page 188 Approx. 37 kg (82 lb) Option 1R Approx. 38 kg (84 lb) Dimensions (Nominal) Height 326 mm (12.8 in) with feet 310 mm (12.2 in) without feet Width 429 mm (16.9 in) Depth 635 mm (25.0 in) A-16 370B User Manual...
Page 189 GPIB accessible with the TEXT command. Alphanumeric character A,B,..,Y,Z,(Space),m, u, Set (2) n,o,,,0,..,9,-,*,(,), Accessible with the Position Control buttons. Maximum text string length 24 characters Character size Approximately 3 mm height, 2 mm width. A-17 370B User Manual...
Page 190 Meets the limits of the National Safe Transit Association test procedure 1A-B-2; 10 drops of 610mm(24 in). Packaged transportation vibration Meets the limits of the National Safe Transit Association test procedure 1A-B-1 ;excursion of 25mm (1 in) at 4.63 Hz (1 .1 G) for 60 minutes. A-18 370B User Manual...
Page 191 CAN/CSA C22.2 NO. 1010.1 Self Declaration EN 61010 1 with second amendment Installation Category Power input - Installation Category II (as defined in IEC 61010-1, Annex J) Pollution Degree Pollution degree 2 (as defined in IEC 61010-1) A-19 370B User Manual...
Page 192 The area is protected from direct sunshine, rain, or direct wind. Pollution Degree 4 Pollution that generates persistent conductivity through conductive dust, rain, or snow. Typical outdoor locations. A-20 370B User Manual...
Page 193 The IEEE-488-1978 (GPIB) standard defines the GPIB interface functions and the allowed subsets of those functions. Table A-18: GPIB Interface Function Implemented As Source handshake Acceptor Handshake Talker Listener Service request Remote Local Parallel poll Device Clear Device trigger Controller A-21 370B User Manual...
Page 194 Appendix A: Specifications A-22 370B User Manual...
Page 195 370B Curve Tracer comes configured for installation in a 19-inch wide instru- ment rack. Option D1 A calibration data test result report will be provided with the 370B Curve Tracer when this option is specified. Option A9 370B Curve Tracer comes without the power cord.
Page 196 Appendix B: Options and Accessories Accessories Standard Accessories The 370B Curve Tracer includes the standard accessories listed in Table B–1: Table B-1: Standard accessories Accessory Part number User Manual 070 A838 XX Fuse 250 V, 2 A, medium blow 159 0260 00...
Page 197 Appendix B: Options and Accessories Recommended The following optional accessories, listed in Table B–3, are recommended for Accessories use with the instrument: Table B-3: Recommended accessories Accessory Model number Thermal Printer iDP3240 CBM, Thermal Printer (http://www.jcbm.co.jp) 370B User Manual...
Page 198 Appendix B: Options and Accessories 370B User Manual...
Page 199 “SELFTEST PASS” message at the error message area of the CRT and sets the initial front panel setup. If the 370B power is turned on while the FAST/SHIFT button is pressed , a more detailed Power-on Diagnostic routine occurs in the following order:...
Page 200 System RAM Check. The 370B checks the system RAM by read/write operation. When a system RAM fatal error is found (such as bus shorted), the memory index display alternately blinks 0 and 2, and the 370B does not advance to the next routine.
Page 201 Appendix C: Diagnostic Routines and Messages LED Check. The 370B sequentially lights all front panel LEDs for visual check. Display Quality Check. The 370B displays the Logo mark, and a CRT adjustment pattern on the CRT for CRT control adjustment. When the adjustment is finished, press FAST/SHIFT to exit this routine.
Page 202 AUX down CURSOR Mode up CURSOR up CURSOR Mode down CURSOR down Position CURSOR CURSOR Position DISPLAY DISPLAY Position Control up POSITION up Position Control left POSITION left Position Control down POSITION down Position Control right POSITION right 370B User Manual...
Page 203 COVER ON COVER OFF GPIB Diagnostic Routine The GPIB TEST? command initiates the 370B system ROMs and RAMs diagnostic routine. The 370B responds to this command by returning system ROM and RAM information to the controller as follows: TEST ROM:000X, RAM:YYYY...
Page 204 Appendix C: Diagnostic Routines and Messages Messages Typical messages displayed in the CRT error message area while the 370B is in operation are listed in Table C–3. Table C-3: Messages Message Description OUTPUT ENABLE OUTPUTS breaker is set to the ENABLED position.
Page 205 Attempt to save or recall a waveform or a setting. If the disk drive is at fault, contact a Tektronix Field Service Representative. FD READ ERROR However, you can still use the 370B, although internal floppy disk functions cannot be used. FD WRITE ERROR...
Page 206 Appendix C: Diagnostic Routines and Messages 370B User Manual...
Page 207 Carrying handle and cabinet feet Correct operation Replace defective module Accessories Missing items or parts of items, bent pins, Replace damaged or missing items, frayed broken or frayed cables, and damaged cables, and defective modules connectors 370B User Manual...
Page 208 3. Clean the monitor screen with a lint-free cloth dampened with either ethyl alcohol or, preferably, a gentle, general purpose detergent-and-water solution. Cleaning the Only qualified personnel should access the inside of the 370B Instrument Interior Programmable Curve Tracer for inspection and cleaning, refer to the Mainte- nance section in the 370B Programmable Curve Tracer service manual.
Page 209 Index...
Page 211 4–26 headers, 4–23 Numbers linked arguments, 4–24 multiple–command messages, 4–25 3.5 inch Floppy Drive, 2–23 other messages, 4–26 370B GPIB commands, 4–28 multiple arguments, 4–24 numeric arguments formats, 4–24 queries, 4–24 commands, GPIB, 4–28 common measurements AC INPUT, 2–27 bipolar transistors, 3–51...
Page 212 CRT image erasing the nonvolatile IC Memory, 3–27 BMP file, 3–41 event codes, 4–46 hardcopy, 3–41 extended acquisition modes, 1–2 HARDCOPY control, 2–23 Horizontal Measurement and Deflection Factor, 3–30 HORIZONTAL, Display Controls, 2–11 factory default values, 3–4 Index-2 370B User Manual...
Page 213 4–44 mass storage, 3–40 MAX PEAK POWER WATTS, COLLECTOR SUPPLY CONTROLS, 2–20 performance conditions, A–1 MAX PEAK VOLTS, COLLECTOR SUPPLY Phone number, Tektronix, 4 polarities of the Collector Supply and Step Generator CONTROLS, 2–20 Measurement Modes Output, 3–39 Repeat, 3–31 POLARITY Single, 3–31...
Page 214 4–20 saving and recalling front panel settings, 3–42 Saving in Store and View Mode, 3–40 sending commands to the 370B, 4–13 sending queries and receiving responses, 4–14 URL, Tektronix, 4 Service support, contact information, 4 user initiated diagnostic routine, C–3...
Page 215 Index Vertical Measurement and Deflection Factor, 3–28 Web site address, Tektronix, 4 VERTICAL, Display Controls, 2–11 WINDOW, CURSOR SELECTION, 2–14 VIEW, Display Controls, 2–9 Zener diode, 3–59 WARNING, Collector Supply control, 2–21 Index-5 370B User Manual...
Page 216 Index Index-6 370B User Manual...

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