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Summary of Contents for Tektronix 7853A
- Page 1 EK RO N IX® B 53A/ B53AN DUAL TIME BASE OPERATORS INSTRUCTION MANUAL ektronix, Inc. P.O. Box 500 Beaverton, Oregon 97005 070-1252-00...
- Page 2 WARRAN Y E K RONIX instruments are warranted against defective materials and w o r kmanship for one year. Any questions with respect to the warrant y should be taken up with your EK RONIX Field Engine eer or representative. A ll r equests for repairs and replacement parts should b e directed to the EK RONIX Fiield Office or representati ve...
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Page 3: Table Of Contents
7B53A/7B53AN Operators ABLE OF CON EN S Page Page SEC ION I OPERA ING INS RUC IONS SEC ION I OPERA ING INS RUC IONS (cont) 7B53A/7B53AN Features Applications 1-15 General General 1-15 Installation Comparison Measurement Controls and Connectors 1 -3 echniques 1-15 ime Duration Measurements... - Page 4 Fig. 1-1. 7B53A and 7B53AN Dual ime Base Units. 7B53A/7B53AN Operators...
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Page 5: Opera Ing Ins Ruc Ions
Section 1-7B53A/7B53AN OPERA ING INS RUC IONS Before proceeding with installation it is necessary to 7B53A/7B53AN Features check the settings of the Variable Selector multi-pin connector (P140) the Delayed Sweep Gate Out he 7B53A and 7B53AN Dual ime Base units provide multi-pin connector (P613). - Page 6 Operating Instructions — 7B53A/7B53AN Operators Variable Selector Connector (P140) Right Side Of Instrument Variable Delayed Sweep Rates Variable Main Sweep Rates Variable Main Sweep Holdoff Delayed Gate Out Connector (P613) Left Side Of Instrument Delayed Gate Out Signal Connected . to DLY'D RIG IN Connector...
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Page 7: Controls And Connectors
Operating Instructions — 7B53A/7B53AN Operators Fig. 1-4. Front-panel controls and connectors. CON ROLS AND CONNEC ORS SLOPE. wo-position switch permits triggering on the positive-going or negative-going portion of the main trig gering signal. General All controls required for the operation of the 7B53A/ 7B53AN, except the Variable Selector and the Dly'd Sweep RIG'D. -
Page 8: Sweep Controls
Operating Instructions — 7B53A/7B53AN Operators 2. Sweep Controls 5. Input/Output Connectors IME/DIV OR DLY IME. Selects the sweep rate of the MAIN RIG IN OR AMP IN. Front-panel BNC connec main sweep generator (see Fig. 1-7). tor serving as an external trigger input for the main triggering circuit or as an external horizontal input, depending upon the setting of the IME/DIV OR DLY... -
Page 9: Sweep Control Functions
Operating Instructions — 7B53A/7B53AN Operators DLY'D RIG 5. Rotate the POSI ION control and note that it LEVEL RUNS AF ER DLY horizontally positions the trace. Rotate the FINE control IME (fully clockwise) and note that it provides precise horizontal positioning. SLOPE Disconnect the calibrator signal. -
Page 10: Main And Delayed Riggering Functions
Operating lnstructions — 7B53A/7B53AN Operators 10. Press the DLY'D ime/Division switch to the inner 15. Connect the indicator oscilloscope Calibrator signal position for the DLY'D SWP Display Mode. Note the to the vertical unit Input connector and to the MAIN magnified display with sweep rate determined by the IN connector. -
Page 11: General Operating Instructions
Operating lnstructions — 7B53A/7B53AN Operators riggered Light 20. Rotate the DLY'D RIG LEVEL control counter clockwise out of switch detent for a triggered delayed RIG'D light conveniently indicates the condition sweep. With the DLY'D RIG SLOPE, COUPLING, and of the triggering circuits. If the MAIN RIGGERING SOURCE switches set to (+), AC, and IN ;... -
Page 12: Main Riggering Coupling
Operating Instructions — 7B53A/7B53AN Operators SINGLE SWEEP, RESE -READY. When the signal to Non-repetitive, random signals can be displayed in the be displayed is not repetitive or varies in amplitude, SINGLE SWP MODE by first obtaining the best possible waveshape, or repetition rate, a conventional repetitive type display in the NORM MODE with a signal which is about display may produce an unstable presentation. -
Page 13: Main Riggering Source
Operating Instructions — 7B53A/7B53AN Operators oscilloscope; see the instruction manuals for these instru AC. In the AC position of the COUPLING switch, the DC component of the trigger signal is blocked. Signals with ments for information. For most applications, the IN position of the SOURCE switch can be used. - Page 14 Operating Instructions — 7B53A/7B53AN Operators Fig. 1-6. Effect of LEVEL control and SLOPE switch on CR display. 1-10...
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Page 15: Rigger Level
Operating Instructions — 7B53A/7B53AN Operators Fig. 1-7. Composite ime/Division switch. rigger Level rate, the switches lock together and the sweep rate of both generators are changed at the same time. However, when he MAIN RIGGER LEVEL control determines the the DLY ’ D ime/Division knob is pulled outward, the clear voltage level on the trigger signal at which the sweep is plastic flange is disengaged and only the delayed sweep... -
Page 16: Ime Measurement
Operating Instructions — 7B53A/7B53AN Operators IME switch so the end of the timing area falls between the second and tenth vertical lines. Sweep Magnifier he sweep magnifier can be used to expand the display ten times. he center division of the unmagnified display is the portion visible on the CR in the magnified form (see Fig. -
Page 17: Display Modes
Operating Instructions — 7B53A/7B53AN Operators Display Modes display, as viewed in the IN EN Display Mode, is displayed on the CR at the sweep rate indicated by the DLY'D Four Display Modes can be selected by appropriate ime/Division switch (see Fig. 1-10B). Calibrated sweep settings of the ime/Division switches (see Fig. -
Page 18: Delayed Sweep Riggering
Operating Instructions — 7B53A/7B53AN Operators DLY'D RIG IN. his connector is an external input for Delayed Sweep riggering the delayed triggering circuit when the DLY'D LEVEL control SLOPE, COUPLING, and SOURCE switch is set to EX . When the DLY'D SOURCE switches are provided for delayed sweep trig ... -
Page 19: Mainframe Operating Modes
Operating lnstructions~7B53A/7B53AN Operators Mainframe Operating Modes 2. Set the IME/DIV OR DL'Y IME switch and the VARIABLE control (Variable Selector connector set to he 7B53A/7B53AN can be operated in a 7000-Series Main Variable) so one cycle of the signal covers an exact Oscilloscope which has four plug-in compartments, either number horizontal divisions. -
Page 20: Ime Duration Measurements
Operating Instructions — 7B53A/7B53AN Operators hen, with a IME/DIV OR DLY IME switch setting 9. Multiply the distance measured in step 8 by the of 50 µs, the period of an unknown signal which completes setting of the IME/DIV OR DL Y IME switch. one cycle in seven horizontal divisions can be determined by using the period formula (step 6): Example. -
Page 21: Risetime Measurements
Operating Instructions — 7B53A/7B53AN Operators ABLE 1-2 ake the reciprocal of the time duration to determine the frequency. Risetime Measurements Divisions Example. he frequency of the signal shown in Fig. 1-13 which has a time period of 0.5 millisecond is: vertically between Vertical... -
Page 22: Delayed Sweep Measurements
Operating Instructions — 7B53A/7B53AN Operators Example. Assume that the horizontal distance between urn the DELAY IME MUL dial clockwise until the 10% and 90% points is four divisions (see Fig. 1-14) and the second pulse is positioned to the same point as the first IME/DIV OR DLY IME switch is set to 1 µs. - Page 23 Operating Instructions — 7B53A/7B53AN Operators 4. Set the IME/DIV OR DLY IME switch to a sweep he apparent sweep magnification can be calculated rate which displays the complete waveform (see Fig. by dividing the IME/DIV OR DLY IME switch setting 1-16A).
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Page 24: Riggered Delayed Sweep Magnification
Operating lnstructions-~7B53A/7B53AN Operators Use the following procedure: riggered Delayed Sweep Magnification he delayed sweep magnification method just described 1. Set up the display as given in Steps 1 through 8 of may produce too much jitter at high apparent magnifica Delayed Sweep Magnification. -
Page 25: Pulse Jitter Measurements
Operating Instructions — 7B53A/7B53AN Operators Pulse Jitter Measurements 10. Pulse jitter is shown by horizontal movement on the pulse (take into account inherent jitter of delayed sweep). In some applications it is necessary to measure the Measure the amount of horizontal movement. Be sure that amount of jitter on the leading edge of a pulse or jitter both vertical and horizontal VARIABLE controls are set to between pulses. -
Page 26: Specifica Ion
Section 2-7B53A/7B53AN SPECIFICA ION General following complete calibration. he following electrical characteristics apply over an ambient temperature range of his instrument will meet the electrical characteristics 0°C to +50°C, except as otherwise indicated. Warmup time listed under Performance Requirement in able 2-1, for given accuracy is 20 minutes. -
Page 27: Mixed Sweep, Variable Ime Delay
Specification — 7B53A/7B53AN Operators ABLE 2-1 (cont) Characteristic Performance Requirement Supplemental Information DELAYED SWEEP (cont) Variable Sweep Rate Continuously variable between calibrated Variable to at least 2.5:1. VARIABLE sweep rates. Extends sweep rate to at control switchable between variable main least 1.25 s/div. -
Page 28: Main Riggering
Specification — 7B53A/7B53AN Operators ABLE 2-1 (cont) Characteristic Performance Requirement Supplemental Information MAIN RIGGERING rigger Sensitivity COUPLING riggering Minimum rigger Frequency Range Signal Required IN 1 (div) (mV) 30 Hz to 10 MHz 10 MHz to 100 MHz AC LF REJ 30 kHz to 10 MHz riggering signal amplitude requirements... -
Page 29: Delayed Riggering
Specification — 7B53A/7B53AN Operators ABLE 2-1 (cont) Performance Requirement Characteristic Supplemental Information DELAYED RIGGERING riggering Minimum rigger rigger Sensitivity Frequency Range Signal Required Coupling IN 1 (div) (mV) 30 Hz to 10 MHz 10 MHz to 100 MHz DC to 10 MHz 10 MHz to 100 MHz... - Page 30 Specification — 7B53A/7B53AN Operators ABLE 2-1 (cont) Characteristic Performance Requirement Supplemental Information OU PU SIGNALS (cont) Sweep Gate Refer to associated oscilloscope manual. Duration DISPLAY MODE MAIN SWEEP, IN EN Coincident with the main sweep interval. DLY'D SWP Coincident with the delayed sweep inter val.
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