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EZ Digital OS-5100 Operation Manual

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Operation Manual
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Summary of Contents for EZ Digital OS-5100

  • Page 1 Analog Oscilloscope Operation Manual www.valuetronics.com...
  • Page 2 Analog Oscilloscope Operation Manual www.valuetronics.com...
  • Page 3 Safety Summary www.valuetronics.com...
  • Page 4 Introduction Thank you for purchasing a EZ product. Electronic measuring instruments produced by EZ digital are high technology products made under strict quality control. We guarantee their exceptional and utmost reliability. For proper use of the product please read this manual carefully.
  • Page 5 Warranty Warranty service covers a period of one year from the date of original purchase. In case of technical failure within a year, repair service will be provided by our service center or sales outlet free of charge. We charge for repairs after the one-year warranty period expires. When the failure is a result of user=s neglect, natural disaster or accident, we charge for repairs regardless of the warranty period.

  • Page 6: Table Of Contents

    CONTENTS 1.PRODUCT DESCRIPTIONS ------------------- 10 1-1. INTRODUCTION --------------------------------------------- 10 1-2. SPECIFICATIONS ------------------------------------------- 10 1-3. PRECAUTIONS ---------------------------------------------- 10 1-4. ACCESSORY ------------------------------------------------ 2. OPERATING INSTRUCTIONS ---------------- 17 2-1. FUNCTION of CONTROLS, CONNECTORS, AND INDICATORS -------------------- 18 2-1-1. Display and Power Blocks ---------------------------- 18 2-1-2.
  • Page 7 3. USER MAINTENANCE GUIDE ---------------- 53 3-1. CLEANING ------------------------------------------------------- 53 3-2. CALIBRATION INTERVAL ----------------------------------- 53 4. DIAGRAMS ------------------------------------------ 54 4-1. EXTERNAL VIEWS -------------------------------------------- 54 4-2. BLOCK DIAGRAM --------------------------------------------- 55 www.valuetronics.com...

  • Page 8: Product Descriptions

    1. PRODUCT DESCRIPTIONS 1-1. INTRODUCTION OS-5100 is the 100MHz, 2 channels, 2 traces which has excellent functions including wide band width, high sensitivity, two timebase generator, delay sweep and divided TV trigger Signal, It reduces the measurement error, and uses 6” squared type CRT with internal fluorescent scale which enables to take the photograph of observed waveform.
  • Page 9 www.valuetronics.com...

  • Page 10: Accessory

    www.valuetronics.com...
  • Page 11 www.valuetronics.com...
  • Page 12 1-3. PRECAUTION Before you operate this instrument, follow the following procedure to ensure safe operation and to prevent any damage to the instrument. 1-3-1. Line voltage selection This instrument must be operated with the correct. Line Voltage Selection switch setting and the correct line fuse for the line voltage selected to prevent damage.
  • Page 13 1-3-2. Installation and handling precautions When placing the OS-5100 in service at your workplace, observe the following precautions for best instrument performance and longest service life. 1. Avoid placing this instrument in an extremely hot or cold place. Specifically, don’t leave this instrument in a close car, exposed to sunlight in midsummer, or next to a space heater.
  • Page 14 1-1. ACCESSORY The following accessories are included in the packing of this product : (1) Operating manual : 1copy (2) AC power code : 1EA (3) Probe (Option : 2 EA (4) Fuse : 1EA www.valuetronics.com...

  • Page 15: Operating Instructions

    2. OPERATING INSTURCTIONS (a) FRONT-PANEL ITEMS (b) REAR-PANEL ITEMS Fig. 2-1. PANEL ITEMS www.valuetronics.com...

  • Page 16: Function Of Controls, Connectors, And Indicators

    This section contains the information needed to operate the OS-5100 and utilize it in a variety of basic and advanced measurement procedures. Included are the identification and function of controls, connectors, and indicators, startup procedures, basic operating routines, and selected measurement procedures.
  • Page 17 [10] CH2 or Y IN connector : For applying an input signal to vertical amplifier channel 2, or to the Y-axis (vertical) amplifier during X-Y operation www.valuetronics.com...

  • Page 18: Sweep And Trigger Blocks

    [19] V MODE : To select the vertical-amplifier display mode. CH1 : CH1 position displays only the channel 1 input signal on the CRT screen. CH2 : CH2 position displays only the channel 2 input signal on the CRT screen. ALT : The waveform appears alternatively at each sweep end.

  • Page 19: Trigger Mode

    B TRIG’D : The delay seep is triggered by the first trigger pulse. [22] A TIME/DIV : To select either the calibrated sweep rate of the main (A) timebase, the delay-time range or delayed-sweep operation [23] B TIME/DIV : To select the calibrated sweep rate of the delayed (B) timebase [24] DLY’SD POSITION : To determine the exact starting point within the A timebase...

  • Page 20: Trigger Source

    NORM : NORM position produces sweep only when a trigger signal is received and other controls are properly set. No trace is visible if any trigger requirement is missing. This mode must be used when the signal frequency is 25Hz or lower. TV-V : TV-V position is used for observing a composite video signal at the frame rate.

  • Page 21: Miscellaneous Features

    [31] TRIG LEVEL : To select the trigger signal amplitude at which triggering occurs. When rotated clockwise, the trigger point moves toward the positive peak of the trigger signal. When this control is rotated counterclockwise, the trigger point moves toward the negative peak of the trigger signal. TIGGER SLOPE : To select the positive or negative slope of the trigger signal for initialing sweep.
  • Page 22 1. A simple lead wire 2. Coaxial cable 3. Scope probes 1. A simple lead wire A simple lead wire may be sufficient when the signal level is high and the source impedance low (such as TTL circuitry), but is not often used. Unshielded wire picks up hum and noise ;...

  • Page 23: Preliminary Control Settings And Adjustments

    2-2-2. Preliminary control settings and adjustments Before placing the instrument in use, set up and check the instrument as follows ; 1. Set the following controls as indicated Power source part POWER SWITCH [1] : OFF (coming up) INTEN [3] : Fully counterclockwise FOCUS [4] : Center...

  • Page 24: Probe Adjustment

    2. Connect the AC Power Cord to the Power Connector [8], then plug the cord into a convenient AC outlet. 3. Press in the Power switch [1], The POWER lamp [2] should light immediately. About 30 seconds later, rotate the INTEN control clockwise until the trace appears on the CRT screen. Adjust brightness to you liking.
  • Page 25 1. Connect probe to CH1 X IN [9]. With CH1 input coupling set to DC, connect tip to PROBE ADJUST [34]. In this case, set the probe damping position to 10 X and set VOLT/DIV [13] to 10mV. 2. Adjust Trigger Level to stabilize screen. When the top or a part of spherical wave is slanted or has any tooth, adjust the probe adjustment trimmer as shown in Fig.

  • Page 26: Signal -Trace Operation

    Single-trace operation with single timebase and internal triggering is the most elementary mode of the OS-5100 Use this mode when you wish to observe only a single signal, and not be disturbed by other traces on the CRT. Since this is fundamentally a two-channel instrument, you have a choice for your single channel.

  • Page 27: Multi-Trace Operation

    2. Set CH2 input coupling [12] to AC, and connect signal to CH2 input connector. 3. Adjust CH2 VOLTS/DIV switch [14] and vertical position terminal [18] to place signal in the measurable area. TRIGGER signal display When signal is applied to TRIGGER generator, signal is displayed on the CRT. 1.

  • Page 28: Trigger Options

    INT and the channel to which waveform with steeper slope is applied. As for other signal, if the frequency is of multiple number, set TRIGGER SOURCE switch [29] to the channel to which low frequency is applied. Remember that no trigger is possible on the screen if the currently used channel is not adjusted using TRIGGER SOURCE [29] 5.
  • Page 29 TV-V, TV-H TRIGGER MODE The TV-V and TV-H positions of the Trigger MODE switch insert a TV sync separator into the trigger chain, so a clean trigger signal at either the vertical-or horizontal-repetition rates can be removed from a composite video signal (Fig 2-3 (b)), set the TRIGGER MODE switch to TV-V.
  • Page 30 www.valuetronics.com...
  • Page 31 (2) TRIGGER POINT selection The SLOPE switch [31] determines whether the sweep will on a positive-going or negative-going transition of the trigger signal. The pressed position is the starting point of rise, and pulled position is the starting point of drop. Always select the steepest and most stable slope or edge.
  • Page 32 www.valuetronics.com...

  • Page 33: Additive And Differential Operation

    CH1 and CH2 signals, In differential operation, the resultant trace represents the algebraic difference between the CH1 and CH2 signals. To set up the OS-5100 for additive operation, proceed as follows : 1. Set V MODE switch [19] to ALT or CHOP, display two channels.

  • Page 34: X-Y Operation

    2-2-8. X-Y operation The internal timebase of the OS-5100 are not utilized in X-Y operation; deflection in both the vertical and horizontal directions is via external signals. Vertical channel I serves as the X-axis (horizontal) signal processor, so horizontal and vertical axis have identical control facilities.

  • Page 35: Delayed-Time Base Operation

    2-2-9. Delayed-time base operation The OS-5100 contains two timebase, arranged so one (the A timebase) may provide a delay between a trigger event and the beginning of sweep by the second (B) timebase. This allows any selected portion of a waveform, or one pulse of a pulse train, to be spread over the entire CRT screen.

  • Page 36: Measurement Applications

    Fig. 2-6 SWEEP MAGNIFICATION BY THE B TIMEBASE 2-3. MEASUREMENT APPLICATIONS This section contains instructions for using your OS-5100 for specific measurement procedures. However, this is but a small sampling of the many applications possible for this oscilloscope. These particular applications were selected to demonstrate certain controls and features not fully covered in BASIC OPERATING PROCEDURES, to clarify certain operations by example, or for their importance and universality.

  • Page 37: Amplitude Measurements

    2-3-1. Amplitude measurements The modern triggered sweep oscilloscope has two major measurement functions. The first of these is amplitude. The oscilloscope has an advantage over most other forms of amplitude measurement in that complex as well as simply waveforms can be totally characterized (i.e., complete voltage information is available).
  • Page 38 6. If 10 X attenuator probes are used, multiply the voltage by 10. 7. If measuring a sine wave below 100Hz, or a rectangular wave 1000Hzm flip the AC- DC, GND switch to DC. <Note> With the waveform to which high voltage is applied, it is impossible to measure as described above.
  • Page 39 (2) Instantaneous voltages 1. Set up the scope for the vertical mode desired per the instructions in 2-2 BASIC OPERATING PROCEDURES. 2. Adjust the TIME/DIV switch [22] or [23] for one complete cycle of waveform and set the VOLTS/DIV switch for a trace amplitude of 4 to 6 divisions (see Fig 2-8). 3.
  • Page 40 Fig. 2-7 PEAK-TOPEAK VOLTAGE MEASUREMENT Fig. 2-8. INSTANTANEOUS VOLTAGE MEASUREMENTS www.valuetronics.com...

  • Page 41: Time Interval Measurements

    2-3-2. Time interval measurements The second major measurement function of the triggered-sweep oscilloscope is the measurement of time interval. This is possible because the calibrated timebase results in each division of the CRT screen representing a known time interval. (1) Basic technique measurement The basic technique for measuring time interval is described in the following steps.
  • Page 42 The basic technique described in the preceding paragraph can be used to determine pulse parameters such as period, pulse width, duty cycle, etc. Period, Pulse Width, and Duty Cycle. The basic technique described in the preceding paragraph can be used to determine pulse paramenters such as period, pulse width, duty cycle, etc.
  • Page 43 www.valuetronics.com...

  • Page 44: Frequency Measurement

    2-3-3. Frequency measurement When a precise determination of frequency is needed, a frequency counter is obviously the first choice. A counter can be connected to the CH1 OUTPUT connector [20] for convenience when both scope and counter are used. However, an oscilloscope alone can be used to measure frequency when a counter is not available, or modulation AND/or noise makes a counter unusable.
  • Page 45 3. Center the stable (trigger source) trace with its Vertical POSITION control, and adjust its amplitude to exactly 6 vertical divisions by means of its VOLTS/DIV switch and VARIABLE control. 4. Use the Trigger LEVEL control [31] to ensure that the trace crossing the central horizontal graticule line at or near the beginning of the sweep.
  • Page 46 2. Make sure the CH2 POSITION [18] / PULL X 10 MAG knob [25] is pushed in. 3. Connect one signal to the CH1 or X IN connector [9], and the other signal to the CH2 or Y IN connect [10]. 4.
  • Page 47 www.valuetronics.com...

  • Page 48: Risetime Measurement

    2-3-5. Risetime measurement Risetime is the time required for the leading edge of a pulse to rise from 10% to 90% of the total pulse amplitude. Falltime is the time required for the trailing edge of a pulse to drop from 90% of total pulse amplitude to 10%.
  • Page 49 8. Multiply the number of divisions counted in step 7 by the setting of the TIME/DIV switch to find the measured risetime. If 10 X magnification was used, divide the TIME/DIV setting by 10. For example, if the A timebase setting in Fig 2-12 (a) was 1s/div (1000ns), the risetime would be 360 nanoseconds (1000ns www.valuetronics.com...
  • Page 50 www.valuetronics.com...

  • Page 51: User Maintenance Guide

    3. USER MAINTENANCE GUIDE Maintenance routines performable by the OS-5100 operator are listed in this section. More advance routines (i.e., procedures involving repairs or adjustments within the instrument) should be referred to EZ service personnel. 3-1. CLEANING If the outside of the case becomes dirty or stained, carefully wipe out the soiled surface with a cloth moistened with detergent, then wipe out the cleaned surface with a dry cloth.

  • Page 52: Diagrams

    4. DIAGRAMS 4-1. EXTERNAL VIEWS www.valuetronics.com...

  • Page 53: Block Diagram

    4-2. BLOCK DIAGRAM www.valuetronics.com...
  • Page 54 The specifications are subjected to change without notice. www.valuetronics.com...

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