GW Instek GOS-6100 User Manual

GOS-6112 OSCILLOSCOPE

USER MANUAL

CONTENTS PAGE

1. PRODUCT INTRODUCTION.................. .......... ........... .........

1-1.Description………………………………………………. 1-2.Feature…………………………………………………...

1 1 2

2. TECHNICAL SPECIFICATION………………………….. 4

3. PRECAUTIONS BEFORE OPERATION…….………….. 3-1.Unpacking the instrument………………….………….. 3-2.Checking the Line Voltage…………………..…………. 3-3.Environment……………………………………..………

3-4.Equipment Installation and Operation………………....

3-5.CRT Intensity…………………………………………… 3-6.Withstanding Voltage of Input Terminals……………...

7 7 7 8 8 8 8

4. PANEL INTRODUCTION……………………..………….. 4-1.Front Panel………………………………………………. 4-2.Rear Panel……………………………………….………

9 11 30

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……………………………….

32 32 34 35 37 39 47

6. MAINTENANCE…………………………………………… 6-1.Fuse Replacement……………………………………….. 6-2.Line Voltage…………………………………………..…. 6-3.Cleaning………………………………………………….

51 51 51 52

7. BLOCK DIAGRAM………………………………………... 53

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 Protective Earth(ground) High Voltage refer to Manual Conductor Terminal Terminal

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FOR UNITED KINGDOM ONLY

NOTE: This lead/appliance must only be wired by competent persons

WARNING: THIS APPLIANCE MUST BE EARTHED

IMPORTANT: The wires in this lead are coloured in accordance with

the following code:

Green/ Yellow: Earth Blue: Neutral Brown: Live (Phase)

As the colours of the wires in main leads may not correspond with the colours marking identified in your plug/appliance, proceed as follows:

USER MANUAL

This cable/appliance should be protected by a suitably rated and 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

should be protected by a 3A or 5A fuse. Larger conductors would normally require 13A types, depending on the connection method used.

Any moulded mains connector that requires removal /replacement must be destroyed by removal of any fuse & fuse carrier and disposed of immediately, as a plug with bared wires is hazardous if a engaged in live socket. Any re-wiring must be carried out in accordance with the information detailed on this label.

The wire which is coloured Green & Yellow must be connected to the

Earth terminal marked with the letter E or by the earth symbol or coloured Green or Green & Yellow.

The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black.

The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red.

If in doubt, consult the instructions provided with the equipment or contact the supplier.

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USER MANUAL

EC Declaration of Conformity

GOOD WILL INSTRUMENT CO., LTD.

No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan

GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.

No. 69 Lushan Road, Suzhou New District Jiangsu, China.

declares that the below mentioned product

GOS-6112

is herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility (89/336/EEC, 92/31/EEC, 93/68/EEC) and Low Voltage Equipment Directive (73/23/EEC). For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive, the following standards were applied:

EN 61326-1: Electrical equipment for measurement, control and laboratory

Conducted and Radiated Emissions EN 55011 class B: 1991 EN 55022 class B: 1994

Current Harmonic EN 61000-3-2: 1995 Voltage Fluctuation EN 61000-3-3: 1995 Surge Immunity

Conducted Susceptibility

Power Frequency Magnetic fie ld

Voltage Dips/ Interrupts

Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC

Safety Requirements EN 61010-1: 1990+A1: 1992+A2: 1995 IEC 61010-1: 1990+A1: 1992+A2: 1995

use –– EMC requirements (1997+A1: 1998)

Electrostatic Discharge EN 61000-4-2: 1994

Radiated Immunity ENV 50140: 1993 Electrical Fast Transients EN 61000-4-4: 1995

EN 61000-4-5: 1995

EN 61000-4-6: 1996

EN 61000-4-8: 1993

EN 61000-4-11: 1994

USER MANUAL

1.PRODUCT INTRODUCTION

1-1. Description

The GOS-6112 is a 100MHz, two-channel, dual-sweep, portable oscilloscope for general purpose use. A microprocessor-based operating system controls most of the functions of the instrument, including cursor readout and digitized panel setting. On-sc reen alphanumeric readout and cursor fu nction for voltage, time, frequency and phase measurement provide extraordinary operational convenience.

The vertical deflection system has two input channels. Each channel has 11 basic deflection factors from 2mV to 5V per division. The horizontal deflection system provides single, dual or delayed sweeps from 0.5s to 50ns per division (delayed sweep, 50ms to 50ns per division). The trigger system provides stable triggering over the full bandwidth of the vertical deflection system.

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GOS-6112 OSCILLOSCOPE

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1-2.Features

Additionally, the oscilloscope offers several other features:

1) High intensity and internal graticule CRT The oscilloscope employs a high intensity 6-inch retangular type cathode-ray tube with red internal graticule. It display s clear readable traces even at high sweep speeds. Internal graticule lines eliminate parallax-viewing error between the trace and the grat icule line .

2) Temperature compensation The oscilloscope uses a temperature compensation circuit to reduce the drift of base line and DC balance.

3) 20MHz bandwidth limit When it is hard to observe or trigger a signal because a high-frequency component is superimposed on the signal, use the 20MHz BWL function to reduce the bandwidth of the vertical deflection system and trigger system to 20MHz.

4) TV triggering Exclusive TV sync separator circuit technology provides stable TV signal measurements on fields, frames and lines.

5) Z-axis intensity modulation For applying a blanking signal from an external source. The trace displayed on the screen may be intensity-modulated where pulse signal or time-scale marks are required.

USER MANUAL

6) Trigger signal output The signal selected by the TRIGGER SOURCE is available. This output may be used to connect to a frequency counter or other instrument.

7) Panel setups lock To avoid unintentional touch of the setting, the feature is extremely useful for long term and repetitive measurements that used to be performed under the same test condition of the oscilloscope setting.

8) LED indicator and buzzer alarm The LED’s located in the front panel assist operation and indicated additional information. Incorrect operation and the electrical end position of control knobs are indicated by a warning beep.

9) SMD manufacturing technology The instrument is built by using the most advanced SMD technology so as to reduce the number of internal wiring and shorten the foil rout e on the pc board. This will also greatly increase the high frequency performance and the reliability of the product.

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2.TECHNICAL SPECIFICATIONS

Sensitivity 2mV~5V/DIV,11 step in 1-2-5 sequence

VERTICAL DEFLECTION SYSTEM

TRIGGER SYSTEM

Sensitivity Accuracy Vernier Vertical Sensitivity

Frequency Bandwidth(-3dB) DC ~ 100MHz (2mV/DIV:DC ~ 20MHz) Rise Time 3.5ns (2mV/DIV:17.5ns) Signal Delay Leading edge can be monitored Maximum Input Voltage 400V (DC+AC) at 1kHz or less Input Coupling AC, DC, GND Input Impedance

Vertical Modes CHOP Repetition Frequency Approx. 250kHz.

Polarity (INV) CH2 only Bandwidth Limit ed 20MHz Common-mode Rejection Ration Dynamic Range 8 div at 60MHz, 5 div at 100MHz. Trigger Modes AUTO, NORM, TV Trigger Source CH1, CH2, LINE, EXT Trigger Coupling AC, DC, HFR, LFR Trigger Slope +/- polarity or TV sync polarity

Trigger Sensitivity

Trigger Level Range TV Sync TV-V,TV-H

Max. External Input Voltage 400V (DC + AC peak) at 1k Hz External Input Impedance

±3% (5 DIV at the center display ) Continuously variable to 1/2.5 or less than

panel-indicated value

1MΩ±2% // 25pF approx. CH1,CH2,DUAL(CHOP/ALT),ADD(DIFF mode can

be established when the CH2 is in the INV mode)

50:1 or better at 50kHz

Mode Frequency INT EXT

AUTO

TV Sync signal 1DIV 200mVpp

INT : ± 4 DIV or more

EXT : ± 0.4 V or more

1MΩ± 5% ∕∕ 25pF approx.

10Hz~20MHz 0.35DIV 50mVpp

20MHz~100MHz 1.5DIV 150mVpp

DC~20MHz 0.35DIV 50mVppNORM

20MHz~100MHz 1.5DIV 150mVpp

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GOS-6112 OSCILLOSCOPE

HORIZONTAL DEFLECTION SYSTEM

X-Y OPERATION

CURSOR READOUT FUNCTION

CRT

Z-AXIS INPUT

USER MANUAL

Horizontal Modes MAIN(A), ALT, DELAY(B) A (main) Sweep Time B (delay) Sweep Time 50nS~50mS/DIV

Accuracy ± 3% (± 5% at × 10 MAG) Sweep Magnification × 10 (maximum sweep time 5nS/DIV) Hold Off time Variable Delay Time 1uS~5S Delay Jitter 1/20000 or less Alternate Separation Variable

Sensitivity Accuracy

X-axis Bandwidth DC~500kHz (-3dB) Phase Error

Cursor Measurement Function Cursor Resolution 1/100 DIV

Effective Cursor Range Vertical: ± 3 DIV; horizontal: ± 4 DIV Panel setting

Type

Phosphor P31 Accelerating Potential 12kV approx. External intensity modulation Coupling DC Voltage 5V or more Maximum Input Voltage 30V (DC+AC peak) at 1kHz or less Bandwidth DC~5MHz

50nS~0.5S/DIV, continuously variable (UNCAL)

X-axis, Y-axis selectable X-axis: CH1, CH2Æ 2mV~5V/DIV ± 3%

EXT Æ 0.1V/DIV ± 5%

Y-axis: CH1,CH2Æ 2mV~5V/DIV ± 3%

3°or less at DC~50kHz ΔV,ΔV%,ΔVdB,ΔT,1/ΔT,ΔT%,Δ

Vertical: V/DIV (CH1,CH2),UNCAL, ADD,

INV, P10, AC/DC/GND.

Horizontal: S/DIV (MTB, DTB), UNCAL x 10MAG, Delay time, Hold-off. Trigger: Source, Coupling, Slope, Level , TV-V/TV-H. Others: X-Y, LOCK. 6-inch rectangular type with internal graticule 0%, 10%, 90% and 100% markers. 8 x 10 DIV (1 DIV = 1 cm)

TRIGGER SIGNAL OUTPUT

CALIBRATOR OUTPUT

SPECIAL FUNCTION

LINE POWER REQUIREMENT

OPERATING ENVIRONMENT

STORAGE TEMPERATURE & HUMIDITY MECHANICAL SPECIFICATION

ACCESSORIES

USER MANUAL

Voltage Frequency Response DC~10MHz

Output Impedance Waveform 1kHz ± 5%, square wave

Voltage 2Vpp ± 2% Impedance

Panel Setups Lock Provided Voltage

Frequency 50Hz or 60Hz Power Consumption Approx. 90VA, 70W(max.) Indoor use Altitude up to 2000 m Ambient temperature : To satisfy specifications : 10° to 35℃ ( 50° to 95°F ) Maximum operating ranges: 0° to 40℃( 32 °to 104°F ) Relative humidity:85% RH(max.) non condensing Installation Category II Pollution degree 2

-10° to 70℃, 70%RH(maximum)

Dimensions 310 W × 150 H × 455 D (mm) Weight Approx. 9kgs (19.8 lbs)

Power cord….............……….. 1

Instruction manual…………… 1 Probe (×1/×10)…………..… 2

25mV/DIV approx. in 50Ω termination

50Ω approx.

2kΩ approx.

AC 100V, 120V, 230V ± 10% selectable

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GOS-6112 OSCILLOSCOPE

USER MANUAL

3.PRECAUTIONS BEFORE OPERATION

3-1.Unpacking the Oscilloscope

The product has been fully inspected and tested before shipping from the factory. Upon receiving the instrument, please unpack and inspect it to check if there is any damages caused during transportation. If any sign of damage is found, notify the bearer and/or the dealer immediately.

3-2.Checking the Line Voltage

The oscilloscope can be applied any kind of line voltage shown in the table below. Before connecting the power plug to an AC line outlet, make sure the voltage selector of the rear panel is set to the correct position corresponding to the line voltage. It might be damaged the instrument if connected to the wrong AC line voltage.

WARNING. To avoid electrical shock the power cord protective grounding conductor must be connected to ground.

When line voltages are changed, replace the required fuses shown as below:

Line voltage Range

100V 120V

108-132V

WARNING. To avoid personal injury, disconnect the power

Fuse Line voltage Range

90-110V

cord before removing the fuse holder.

T 1A 250V 230V 207-250V T 0.4A 250V

Fuse

USER MANUAL

3-3.Environment

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 temperature range may cause damage to the circuits. Do not use the instrument in a place where strong magnetic or electric field exists as it may disturb the measurement.

3-4.Equipment Installation, and Operation

Ensure there is proper ventilation for the vents in the oscilloscope case. If this equipment is used not according to the specification, the protection provided by the equipment may be impaired.

3-5.CRT Intensity

To prevent permanent damage to the CRT phosphor, do not make the CRT trace brighten excessively or leave the spot stay for an unreasonably long time.

3-6.Withstanding Voltages of Input Terminals

The withstanding voltages of the instrument input terminals and probe Input terminals are shown in the following table. Do not apply voltages higher than these limits.

Input terminal Maximum input voltage

CH1, CH2, inputs 400V (DC + AC peak)

EXT TRIG input 400V (DC + AC peak)

Probe inputs 600V (DC + AC peak)

Z AXIS input 30V (DC + AC peak)

CAUTION. To avoid instrument damage, do not apply exceeding maximum input voltage of 1 kHz the frequency to the instrument.

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4. PANEL INTRODUCTION

After the instrument is switched on, all the important settings are displayed in the readout. The LED’s located on the front panel assist operation and indicate additional information. Incorrect operation and the electrical end positions of control knobs are indicated by a warning beep.

Except the Power pushbutton (POWER), the Focus control (FOCUS), and the Trace Rotation control, all other controls are electronically selected, and their functions and sett ings can t herefor e be store d.

The front panel is subdivided into six sections:

z Display controls z Vertical controls z Horizontal controls z Trigger controls z Measurement control z Input connectors

USER MANUAL

Front panel of GOS-6112

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4-1.Front Panel

Display controls

The display controls adjust the on-screen appearance of the waveform and provide a probe compensation signal source.

FOCUS

CAL

2Vp-p

1 KHz

ROTATION

4 3

TRACE INTEN

OFF

(1).POWER – Pushbutton and symbols for ON(1) and OFF(0).

When switch on the oscilloscope to have all LEDs lighted and the software version will be displayed on the screen. After the Internal test is completed successfully, the normal operation mode is present. Then the last settings become activated and the LED indicates the ON condition.

(2).INTEN – TRACE/READOUT – Control knob with associated

pushbutton and readout display.

The control knob is used for adjusting the traces and readout intensity. Turning the knob clockwise to increase the intensity and turning it counterclockwise to decrease the intensity.

The TRACE/READOUT pushbutton is for selecting the intensity function and indicates the letter “TRACE INTEN” or “READOUT INTEN” in the readout. Press the pushbutton briefly for the following sequences:

“TRACE INTEN” — “READOUT INTEO” — “TRACE INTEN”

TRACE/

POWER

READOUT

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(3).TRACE ROTATION

The TRACE ROTATION is for aligning the horizontal trace in parallel with graticule lines. This potentiometer can be adjusted with a small screwdriver.

(4).FOCUS

The control knob effects both the trace and the readout sharply.

(5).CAL

The terminal provides a reference signal of 2Vp-p at 1kHz for probe adjustment.

Vertical controls

The vertical controls select the displayed signals and control the

amplitude characteristics.

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VERTICAL

POSITION

20MHz

AC/DC

CURSOR

BWL POS

V1/2

VOLTS/DIV

2mV

CH1

VAR

GND

Px10

17 19 18 20

ALT/ CHOP/ ADD

AC/DC

POSITION

INV

VOLTS/DIV

VAR

Px10

TRACE

2mV

CH2

GND

SEP

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