Instek Digital GOS-6103C User Manual
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Instek Digital GOS-6103C User Manual

Oscilloscope
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GOS-6103C OSCILLOSCOPE
USER MANUAL
CONTENTS
1.
PRODUCT INTRODUCTION................................................
1-1.Description.......................................................
1-2.Feature............................................................
2.
TECHNICAL SPECIFICATION................................ 4
3.
PRECAUTIONS BEFORE OPERATION.....................
3-1.Unpacking the instrument....................................
3-2.Checking the Line Voltage....................................
3-3.Environment.....................................................
3-5.CRT Intensity...................................................
4.
PANEL INTRODUCTION........................................
4-1.Front Panel.......................................................
4-2.Rear Panel.......................................................
5.
OPERATION METHOD..........................................
5-1.Readout Display..................................................
5-2.Connecting Input Signals......................................
5-3.Adjustment and Checks.......................................
5-4.Function Check..................................................
5-5.Basic Operation..................................................
5-6.Measurement Application.....................................
6.
MAINTENANCE...................................................
6-1.Fuse Replacement...............................................
6-2.Line Voltage......................................................
6-3.Cleaning..........................................................
7.
BLOCK DIAGRAM................................................. 55
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54
GOS-6103C OSCILLOSCOPE
USER MANUAL
SAFETY TERMS AND SYMBOLS
These terms may appear in this manual or on the product:
WARNING. Warning statements identify condition or
practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or
practices that could result in damage to this product or
other property.
The following symbols may appear in this manual or on the product:
DANGER
ATTENTION
High Voltage refer to Manual Conductor
 ii 
Protective
Earth(ground)
Terminal
Terminal

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  • Page 1: Table Of Contents

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL CONTENTS PAGE SAFETY TERMS AND SYMBOLS PRODUCT INTRODUCTION..........1-1.Description………………………………………………. These terms may appear in this manual or on the product: 1-2.Feature…………………………………………………... TECHNICAL SPECIFICATION………………………….. 4 WARNING. Warning statements identify condition or PRECAUTIONS BEFORE OPERATION…….…………..
  • Page 2 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL This cable/appliance should be protected by a suitably rated and FOR UNITED KINGDOM ONLY approved HBC mains fuse: refer to the rating information on the equipment and/or user instructions for details. As a guide, cable of 0.75mm...

  • Page 3: Product Introduction

    The oscilloscope employs a high intensity 6-inch retangular type cathode-ray tube with red internal graticule. It displays clear readable The GOS-6103C is a 100MHz, two-channel, dual-sweep, portable traces even at high sweep speeds. Internal graticule lines eliminate oscilloscope for general purpose use. A microprocessor-based operating parallax-viewing error between the trace and the graticule line.

  • Page 4: Technical Specification

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 2.TECHNICAL SPECIFICATIONS 7) Trigger signal output Sensitivity 2mV~5V/DIV,11 steps The signal selected by the TRIGGER SOURCE is available. This in 1-2-5 sequence output may be used to connect to a frequency counter or other ±3% (5 DIV at the center display )
  • Page 5 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL External intensity modulation Coupling Horizontal Modes MAIN(A), ALT, DELAY(B) Z-AXIS Voltage 5V or more 50ns~0.5s/DIV, continuously variable INPUT Maximum Input Voltage 30V (DC+AC peak) at 1kHz or less A (main) Sweep Time...

  • Page 6: Precautions Before Operation

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 3.PRECAUTIONS BEFORE OPERATION 3-3.Environment 3-1.Unpacking the Oscilloscope The normal ambient temperature range of this instrument is from 0° to 40°C (32° to 104°F). To operate the instrument over this specific The product has been fully inspected and tested before shipping from the temperature range may cause damage to the circuits.

  • Page 7: Panel Introduction

    Scale Illumination control (ILLUM) and the Trace Rotation control, all other controls are electronically selected, and their functions and settings can therefore be stored. The front panel is subdivided into six sections: Display controls Front panel of GOS-6103C Vertical controls Horizontal controls Trigger controls Measurement and SAVE/RECALL controls Input connectors ...

  • Page 8: 4-1.Front Panel

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 4-1.Front Panel (3).TRACE ROTATION Display controls The TRACE ROTATION is for aligning the horizontal trace in The display controls adjust the on-screen appearance of the waveform and parallel with graticule lines. This potentiometer can be adjusted with a provide a probe compensation signal source.
  • Page 9 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL (7).20MHz BWL – Pushbutton with indicator LED. (11)TRACE SEP Briefly pressing the pushbutton, the bandwidth is reduced to approx. The instrument contains a trace separate function which is required in 20MHz, and the measurement is made by eliminating undesired high the alternate time base mode to separate the DELAY time base trace(s) frequency signal from the waveform.
  • Page 10 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL (13)CH1 VOLTS/DIV. (17)CH1 AC/DC. (14)CH2 VOLTS/DIV– Control knob for channel 1/channel 2 has double (18)CH2 AC/DC function. Pressing the pushbutton briefly to switch over from AC (~ symbol) to Turning the knob clockwise to increase the sensitivity in 1-2-5 sequence DC (= symbol) input coupling.
  • Page 11 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL Horizontal controls: (22)MAIN/ALT/DELAY—X-Y – Pushbutton for time base mode The horizontal controls select the time base operation mode and adjust the selection. horizontal scale, position and magnification of the signal. The instrument contains two-time base designated MAIN and DELAY.
  • Page 12 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL coefficient (uncalibrated i.e. “DLY>0.125ms”). The width of the SETUPS LOCK window segment decreases when the DELAY time coefficient is set to Pressing and holding the pushbutton, then switch the panel setups lock a lower value (higher time deflection speed).
  • Page 13 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL coefficient (reduce the deflection speed) and the deflection coefficient (26)MODE – Pushbutton and indicator LEDs. becomes uncalibrated. Instead of “A=10μs”, the readout then displays Pressing the pushbutton to select the trigger mode. The actual setting “A>10μs”...
  • Page 14 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL LFR (Low Frequency Reject) When the setting (voltage) value is out of the changing portion of the Attenuates low-frequency triggering signal components below 40kHz observation waveform, the synchronization sweep stops. Sometimes a and blocks the DC component of the trigger signal.
  • Page 15 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL (30)DELAY-HO—Control knob with a double function and associated (31)TV-V/TV-H—Pushbutton for video sync signal selection. LED. TV-V The control knob has two different functions depending on the time Start the main trace at the beginning of a video signal field. SLOPE base mode.
  • Page 16 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL Measurement and Panel setting Control FUNC (Function) The measurement section controls the on-screen readout and the cursor In the AUTO measurement mode, each time when the pushbutton is measurements. For more information, please refer to page 9 “PANEL briefly pressed the four measurement parameters will be selected in the INTRODUCTION”...
  • Page 17 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL (34) MEMO- 9 —SAVE/RECALL (35)CH1—Input BNC socket The instrument contains 10 non-volatile memories, which can be used This BNC socket is the signal input for channel 1. In X-Y mode, by the operator to save instrument setting and to recall them. It relates signals at this input are used for the Y or X deflection.

  • Page 18: 4-2.Rear Panel

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 4-2.Rear Panel (42)Z-Axis Input—BNC socket The rear panel provides input power and additional signal connections. Connect external signals to the Z-axis amplifier for intensity modulating the CRT display. This terminal is DC-coupled. The intensity is lowered by a positive signal, while it is increased by a negative signal.

  • Page 19: Operation Method

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 5. OPERATION METHOD This section contains basic operation information and techniques that should be considered before proceeding any measurement. As for the location and function of instrument controls, connectors, and indicators, refer to the “Instruction of Front Panel and Rear Panel” of this manual.

  • Page 20: 5-2.Connecting Input Signals

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 5-2.Connecting Input Signals 5-3.Adjustments and checks Grounding Trace Rotation Adjustment The most reliable signal measurements are made when the oscilloscope Normally, when the trace is in parallel with the center horizontal graticule and the unit under test are connected by a common reference (ground line, there will be no need to adjust the TRACE ROTATION.

  • Page 21: 5-4.Function Check

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 5-4.Function Check 7. Observe the displayed waveform and compare them with the When you start to check the operation of your oscilloscope, proceed the waveforms shown in figure 5-2. If either probe needs to be adjusted, following instruction: proceed the step 8.

  • Page 22: 5-5.Basic Operation

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 5-5.Basic Operation 4. Set both CH1 and CH2 COUPLING to GND. Displaying CH1 or CH2 5. Use the CH1 and CH2 POSITION controls to align both traces on the To display the signal from a signal channel, pressing briefly the CH1 or center graticule.
  • Page 23 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL Displaying the sum or difference of CH1 and CH2 Comparing Frequency and phase (Single X-Y Operation) To display the algebraic sum or difference of CH1 and CH2, proceed the To compare the frequency and phase between two signals by using the following steps: X-Y mode.
  • Page 24 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL Setting up Dual X-Y Operation To use the oscilloscope in the dual X-Y mode, proceed the following steps: 2. Set the MAIN/ALT/DELAY button to ALT mode, and set the time 1. Connect the horizontal or X-axis signal to the EXT (X) input.
  • Page 25 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL Magnifying Waveform Events Use the ×10 MAG pushbutton to view small portions of a waveform as which is too far back from the starting point to view by using the TIME/DIV control. To use the ×10 MAG button, proceed the following steps: 1.

  • Page 26: 5-6.Measurement Application

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 5-6.Measurement Application The oscilloscope has a cursor measurement system for making accurate, direct-readout voltage, time, frequency and phase measurements. The measurements described in this section are examples of typical applications using this measurement system. After becoming familiar...
  • Page 27 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL Figure 5-14: Cursor Measurement 1. Set the VOLTS/DIV and VAR controls to provide an exact (a).Typical △ V (Voltage difference) for AC five-division vertical display. voltage. 2. Use the vertical POSITION control to control the negative amplitude...
  • Page 28 GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL (g).Typical △ Θ cursor function for phase AUTO MEASUREMENT measurement. Proceed a measurement by using the auto-measurement according to the A phase measurement is done by first setting following steps: a reference for the full 360 waveform 1.

  • Page 29: Maintenance

    GOS-6103C OSCILLOSCOPE GOS-6103C OSCILLOSCOPE USER MANUAL USER MANUAL 6-3.Cleaning 6.MAINTENENCE To clean the oscilloscope, use a soft cloth dampened in a solution of mild The following instructions are executed by qualified personnel only. To avoid detergent and water. Do not spray cleaner directly onto the oscilloscope electrical shock, do not perform any servicing other than the operating because it may leak into the cabinet and cause damage.

  • Page 30: Block Diagram

    GOS-6103C OSCILLOSCOPE USER MANUAL 7.Block Diagram  55 ...

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