EC Declaration of Conformity GOS-6031, GOS-6030
Contents
1. 34 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 5 5 Basic Operation Displaying CH1 or CH2 To display the signal from a signal channel pressing briefly the CH1 or CH2 pushbutton to set the oscilloscope to channel 1 or channel 2 Displaying CH1 and CH2 To display both signals at the same time proceed the following steps 1 Set the CH1 and CH2 on The figure 5 5 below shows two synchronous waveforms in the both modes 2 Adjust the CH1 or CH2 POSITION control to position the two waveforms 3 Set the ALT CHOP button to CHOP mode if the waveforms are flickering f f 1 09607kHz P10 5V P10 2V Sms CH1 X AC Figure 5 5 Both typical waveforms GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Displaying the sum or difference of CH1 and CH2 To display the algebraic sum or difference of CH1 and CH2 proceed the following steps 1 Set the ADD button to ADD mode The figure 5 6 below shows the sum of the waveforms from figure 5 5 2 Set the CH2 INV on by pressing and holding the button if necessary to display the different waveform 3 Pressing and holding one of the VOLTS DIV control knob to set it to vernier variable Then adjust one channel to the other in the event of gain difference f 1 09607kHz p10 5V P10 2Vi Sms CH1X AC Figure 5 6 Typic2. 90 110V CH1 CH2 inputs 400V DC AC peak 120V 108 132y T14250V 230V 207 250V T 0 4A250V EXT TRIG input 400V DC AC peak Probe inputs 600V DC AC peak Z AXIS input 30V DC AC peak WARNING To avoid personal injury disconnect the power cord hetore removing thefuse holder i CAUTION To avoid damaging the instrument do not apply input voltages of the frequency over 1 kHz to the instrument Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL 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 All of the pushbuttons VOLTS DIV control knobs TIME DIV control knobs are electronically selected and their functions and settings can pa therefore be stored 4 A E insek oscrsoscors cos sosi Gums a i Front panel of GOS 6031 6051 The front panel is subdivided into four sections Display controls Vertical controls Horizontal controls Trigger controls
3. The horizontal controls select the time base operation mode and adjust the horizontal scale position and magnification of the signal GND Each time when the pushbutton is pressed briefly the input of the vertical amplifier is grounded It is displayed in the readout as an earth ground symbol abe Px10 Pressing and holding the pushbutton to select the indicated deflection coefficient of the channel displayed in the readout between 1 1 and 10 1 The probe factor of 10 1 is displayed in the readout with the probe symbol Px10 in front of channel indication When proceed cursor voltage measurement the probe factor will be automatically included The symbol must not be activated unless a 10 1 attenuator probes are used HORIZONTAL EA MAS lt q POSITION gt Ny x 2 5 29 ad TIME DIV 2 8 Jp 27 0 58 0 m s GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 25 H POSITION The control knob enables a horizontal position shift of the signals In combination with MAG the function makes it possible to shift any part of the signal on the screen In X Y mode the control knob are used for the X deflection 26 TIME DIV VAR Control knobs Turning the knob clockwise to reduce the deflection coefficient in a 1 2 5 sequence and turning it in the opposite direction CCW to increase The time coefficient s will be displayed in the readout The time deflection coefficients between 0 5s div and 0
4. 5 4 Function Check When you start to check the operation of your oscilloscope proceed the following instruction 1 Install the x10 probes onto CH1 and CH2 inputs 2 Connect the probe tips to the CAL test point of the oscilloscope 3 Set the oscilloscope controls to display both channels VERTICAL VOLTS DIV 0 2V COUPLING DC ALT CHOP CHOP HORIZONTAL TIME DIV 0 5ms TRIGGER MODE ATO SOURCE VERT COUPLING AC SLOPE 3 The figure 5 3 below illustrates a satisfactory display The waveform should be approximately 0 5Vp p at a frequency of 1kHz that confirms the vertical and horizontal deflection function of the oscilloscope f 1 09369kHz P10 2V Sms VERT AC Figure 5 3 93 GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 4 Set both CH1 and CH2 COUPLING to GND 5 Use the CH1 and CH2 POSITION controls to align both traces on the center graticule 6 Open the CH2 INV by pressing and holding the pushbutton 7 Set to the ADD mode by pressing the ADD pushbutton briefly 8 Set both CH1 and CH2 COUPLING to DC 9 The figure 5 4 below shows a satisfactory display The display will show a flat trace located on the center gracticule that confirms the channel balance and ADD offset function f 1 09369kKHz P10 2V 4 P10 2Vi Sms VERTXAC Figure 5 4 ADD mode 10 Turn off the ADD mode by pressing the ADD pushbutton briefly 11 Turn off the CH2 INV by pressing and holding the pushbutton
5. Each time when the COUPLING pushbutton is pressed the trigger coupling changes in the sequence AC HFR LFR AC AC Attenuates trigger signal frequency components below 20Hz and blocks the DC component of the signal AC coupling is useful for triggering on AC waveforms that have a large DC offset HFR High Frequency Reject Attenuates high frequency triggering signal components above 50kHz HFR coupling is useful for providing a stable display of low frequency components of complex waveforms and eliminates high frequency interference from the trigger signal LFR Low Frequency Reject Attenuates low frequency triggering signal components below 30kHz and blocks the DC component of the trigger signal LFR coupling is useful for producing stable triggering on the high frequency components of complex waveforms and rejecting low frequency interference or power supply hum from the trigger signal 35 TRIGGER LEVEL Control knob with TRG LED Turning the control knob causes a different trigger input setting voltage and set to a suitable position for the starting of triggered sweep of the waveform When rotate clockwise the control knob the 2 94 GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL trigger point moves toward the positive peak of the trigger signal and rotate it counterclockwise to move the trigger point toward the negative peak of the trigger signal When the setting voltage value is out of
6. GJ irisrex oscimoscore cos 6030 Gomz AN Front panel of GOS 6030 6050 GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL 4 1 Front Panel 3 INTEN Control knob Display controls The control knob is used for adjusting the traces intensity Turning the The display controls adjust the on screen appearance of the waveform and knob clockwise to increase the intensity while turning it provide a probe compensation signal source counterclockwise to decrease the intensity P 4 FOCUS ne The control knob effects both the trace and the readout sharply POWER eee 4 a The terminal provides a reference signal of 0 5Vp p at 1kHz for probe ue A adjustment ccm di o o 6 Ground Socket Banana Socket galvanically connected to safety earth 2 a This socket can be used a reference potential connection for DC and low p 4 5 4 0 frequency signal measurement purpose l bag 7 TEXT ILLUM Control knob with a double function 7 nce The pushbutton is for selecting the text readout intensity function or 4 T scale illumination function and indicates the letter TEXT or ILLUM in the readout Press the pushbutton for the following sequences ia TEXT ILLUM TEXT 6 ac The TEXT ILLUM function are associated the VARIABLE 9 control knob Turning the knob clockwise to increase the text intensity or scale 1 POWER Push
7. calibrated steps in 1 2 5 sequence Vernier Vertical Sensitivity Bandwidth 3dB and Rise Time Continuously variable to 1 2 5 or less of panel indicate value GOS 605 1 6050 Bandwidth 3dB Rise Time 5mV 20V DIV DC S50MHz Approx 7ns ImV 2mV DIV DC 7MHz Approx 50ns GOS 6031 6030 Bandwidth 3dB __ Rise Time 5mV 20V DIV DC 30MHz___ Approx 11 7ns Maximum Input Voltage ImV 2mV DIV DC 7MHz Approx 50ns 400V DC AC peak at 1kHz or less Input Coupling AC DC GND Input Impedance Approx IMQ 2 approx 25pF Vertical Modes CH1 CH2 DUAL CHOP ALT ADD CH2 INV CHOP Frequency Approx 250kHz Dynamic Range GOS 6051 6050 6DIV at SOMHz GOS 603 1 6030 8DIV at 20MHz 6DIV at 30MHz Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL HORIZONTAL SYSTEM Sweep Time 0 2 s DIV 0 5s div 20 steps selectable in 1 2 5 sequence continuous variable control between steps at least 1 2 5 GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Accuracy 3 5 at x5 and x10 MAG 8 at x20 MAG Sweep Magnification x5 x10 x20 MAG Maximum Sweep Time at MAG GOS 6051 6050 20ns DIV 10ns DIV uncalibrated GOS 6031 6030 50ns DIV 10ns D
8. 2 s div can be chosen in 1 2 5 sequence if the MAG function is not activated VAR Pressing the pushbutton to select the TIME DIV control knob function between time base switch and vernier variable After switching on the VAR the time deflection coefficient is still calibrated until further adjustments are made Turn the TIME DIV control knob counter clockwise to increase the time deflection coefficient reduce the deflection speed and the deflection coefficient becomes uncalibrated The current setting is displayed by the gt symbol in the readout 27 X Y Pressing the pushbutton when using the instrument as an X Y oscilloscope The time deflection coefficient is replaced by the X Y symbol in the readout In this mode the X horizontal signal is connected to the input of CH1 the Y vertical signal is applied to the input of CH2 and has a deflection range from less than 1mV to 20V div at a reduced band width of 500kHz GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 28 x1 MAG Pressing the pushbutton the select the sweep time between x1 normal and MAG magnify If the MAG function the signal display will be expanded and consequently only a part of the signal curve is visible The interesting part of the signal can be made visible with the aid of the H POSITION control 29 MAG FUNCTION x5 x10 x20 MAG When MAG has been done the displayed waveform will be expanded to the right and left wi
9. MAG x5 MAG x10 or MAG x20 for MAG function When above procedures have been done the displayed waveform will be expanded 10 times to the right and left from the center of screen as center of expansion Figure 5 8 Magnified Waveform eae eee Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL MAG ALT Function The input Signal is displayed by pressing MAG magnify and MAG ALT LED light buttons 1 Set the wished portion of the waveform to the center of the screen for magnification 2 The magnified waveform spreads about 3 divisions below the normal x 1 waveform 3 It is a normal function when the MAG ALT button is pressed the characters will be vanished from the screen Figure 5 9 a Mag x1 Waveform Figure 5 9 b Mag x10 Waveform GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Operating Hold off time Control When the measured signal is a complex waveform with two or more repetition frequencies period triggering with the LEVEL control alone may not be sufficient to attain a stable waveform display In such a case the sweep can be stable synchronized to the measured signal waveform by adjusting the Hold off time of the sweep waveform Figure 5 10 a shows several different waveforms which overlapped on the screen marking the signal observation unsuccessful when the hold o
10. and have a high input impedance for low circuit loading CAUTION To get the best waveform precisely keep probe ground and signal leads as short as possible Misadjust probe compensation can cause measurement error Check and adjust probe compensation whenever a probe is moved to a different channel or oscilloscope As for the probe compensation adjustment procedure refer to the Probe Compensation Coaxial Cables Signal input cable can greatly affect the accuracy of a displayed waveform To maintain original frequency characteristics of the input signal use only high quality low loss coaxial cables Coaxial cables must be terminated at both ends in their characteristic impedance to prevent signal reflections within the cable Use suitable impedance matching devices 0 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 5 3 Adjustments and checks Trace Rotation Adjustment Normally when the trace is in parallel with the center horizontal graticule line there will be no need to adjust the TRACE ROTATION If necessary adjust the TRACE ROTATION to make the baseline trace parallel to the center horizontal graticule line by using a small straight blade screwdriver or alignment tool Probe Compensation To minimize the distortion of measured waveforms check the compensation of your prob
11. as follows The wire which is coloured Green amp Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol or coloured Green or Green amp 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 Por coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier ii GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 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 amp 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 v v Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com G
12. level possible for synchronization ALTERNATE TRIGGER Input coupling DC Input coupling AC The Jittering wave as shown in Figure may appear on the screen when a gently slopping signal is displayed 10 cycles or less approximately by setting VERT MODE to SOURCE and setting ALT CHOP pushbutton to ALT For detailed and clear observation of each signal set VERTICAL mode to CH1 or CH2 Figure 5 11 Trig Source on VERT Apply AC coupling to CH2 in order to expand the synchronization range If the input signal of CH1 or CH2 becomes small adjust VOLT DIV control knob to obtain sufficient amplitude The VERT MODE triggering required 2 0 div which is larger than the a zsa amplitude of CH1 or CH2 Iwao e eRe Figure 5 13 Alternate Trig 414 42 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Triggering of Video signal In the work concerned with TV complex signals and containing video signal blanking pedestal signal and synchronizing signal are often measured Press the TV pushbutton to set the TV position The built in active TV Sync separator provides the separation of frame or line sync pulses from the video signal To trigger the oscilloscope at the vertical frame rate press the TV pushbutton to set TV V and TV H triggering The figure 5 14 a shows vertical signal of TV V a
13. type of readout information displayed is illustrated in figure 5 1 GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL SAVE OR RECALL MESSAGE NO OF MEM M0 M9 SAVE r gt RECALL MEASUREMENT FUNCTION AND VALUE INTEN OR ILLUM P10 4 P10 ALT CH2 VAR MAG MAG FREQUENCY CHOP UNCAL gt x5 UNCAL COUNTER x40 2 VALUE CH1 CH2 x20 PROBE PROBE TRIG COUPLING x10 x10 AC SWEEP VAR HFR CH1 VAR CH2 UNCAL gt LFR OnE a SWEEP TIME CH1 CH2 S DIV TE A NOLTSIAY NORTON TRIG SOURCE oF TV POL CH1 CH2 VERT LY INPUT COUPLING INPUT COUPLING ao AC A AC A CH2 DC ADD DC LINE GND yir GND q y EXT Figure 5 1 Readout Layout GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 5 2 Connecting Input Signals Grounding The most reliable signal measurements are made when the oscilloscope and the unit under test are connected by a common reference ground lead in addition to the signal lead or probe The ground lead of the probe provides the best grounding method for signal interconnection and ensures the maximum amount of signal lead shielding in the probe cable A separate ground lead with a banana plug can also be connected from the unit under test to the oscilloscope ground jack on the front panel Probes A probe provides the most convenient way to connect an input signal to the oscilloscope The standard x1 x10 probes supplied to the oscilloscope are shielded against electromagnetic interference
14. value on the screen Typical measurement readouts and applications are shown in Figure 5 16 The measurement values are automatically controlled by the VOLTS DIV and TIME DIV control settings GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL Figure 5 16 Cursor Measurement a Typical AV Voltage difference for AC 6 MAINTENENCE The following instructions are executed by qualified personnel only To avoid voltage When both CH1 and CH2 are turned on the measurement value of CH1 A V1 electrical shock do not perform any servicing other than the operating instructions unless you are qualified to do so b Typical A T Time difference cursor 6 1 Fuse Replacement measurement for rise time Proceed rise time or fall time measurement requiring some additional signal scaling by using the graticale rise time measurement aids Number 0 10 90 and 100 are etched near the left vertical gratical line Use the following steps as a guideline to in making rise time measurement c Typical 1 A T cursor function for frequency measurement When the two cursors are superimposed at two edge points of the one period waveform by the C1 C2 TRK and VARIABLE controls the measurement value is displayed in frequency units on the upper side of the screen NOTE When the VOLTS DIV or the TIME DIV controls are in uncalibrated setting the A
15. 1 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL 6 3 Cleaning 7 Block Diagram To clean the oscilloscope use a soft cloth dampened in a solution of mild detergent and water Do not spray cleaner directly onto the oscilloscope 33 g because it may leak into the cabinet and cause damage su f Do not use chemicals containing benzine benzene toluene xylene acetone i T k S z l ko gt g 5 or similar solvents Do not use abrasive cleaners on any portion of the h 58 zg H 3 oscilloscope p4 5 zg ee Si dle aol S or t a o 32 3 38 g le a ER SE 55 8 i sf ae zZ Bc x gt i ez AE x u 6G x FE 28 ga F 7 55 i g5 8 iia 25 5 E T g i E T 9 oF 5 ey 82 eS ox fa UNE TRIG CH2 TRIG PICKUP AMP CH2 ca ae O A 5 5 Ze a O t 230 l i l l g z5 E5 E 52 az GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 49 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com
16. 4 11 CH1 Pushbutton 12 CH2 Pushbutton Pressing briefly the CH1 CH2 button to set the channel 1 channel 2 of the instrument on the deflection coefficient will be displayed in the readout indicating the current conditions 13 CH1 POSITION Control knob 14 CH2 POSITION Control knob The vertical trace position of channel 1 channel 2 can be set with the control knob In X Y mode CH2 POSITION control knob is used for the Y both input signals is displayed depends on the phase relationship and the INV setting As a result both signals are displayed as one signal For correct measurements the deflection coefficients for both channels must be equal INV Pressing and holding the pushbutton to set the channel 2 invert function on or off The invert on condition is indicated by the V symbol in the readout The invert function causes the signal display of channel 2 to be inverted by 180 17 CH1 VOLTS DIV 18 CH2 VOLTS DIV Control knob for channel 1 channel 2 has double functions Turning the knob clockwise to increase the sensitivity in 1 2 5 sequence deflection and turning it in the opposite direction CCW to decrease The available range is from lmV div up to 20V div The knob is automatically switched inactive if the related channel is switched off Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030
17. 50W max MECHANICAL Dimensions 275 W x130 H x370 D mm SPEC Weights 8 kg OPERATING Indoor use ENVIRONMENT Altitude up to 2000 m Ambient temperature To satisfy specifications 10 C to 35 C 50 F to 95 F Maximum operating ranges 0C to 40 C 32 F to 104 F Relative humidity 85 RH max non condensing Installation Category II Pollution degree 2 STORAGE TEMPERATUR 10 to 70 C 70 RH maximum E amp HUMIDITY ACCESSORIES Power Cord cundcusonesoe Instruction manual Probe x1 x10 Input X axis CH1 Y axis CH2 X Y Sensitivity ImV DIV 20V DIV Bandwidth X axis DC 500kHz 3dB OPERATION Phase Difference 3 or less from DC to 50kHz Voltage approx 20mV DIV with 50Q CH1 Signal Output terminal CRA i j ATA 50Hz to at least 5MHz Calibrator output Voltage 0 5V43 Frequency approx 1kHz square wave GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 3 PRECAUTIONS BEFORE OPERATION 3 3 Environment The normal ambient temperature range of this instrument is from 0 to 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 immediat
18. ER LEVEL control is set within the peak to peak limits of GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL an adequate trigger signal When the sweep is not triggered no baseline trace will be displayed Use this mode when effecting synchronization to a very low frequency signal 25Hz or less 31 SOURCE Pushbutton Pressing the pushbutton to select the trigger signal source The actual setting is indicated by the readout SOURCE slope coupling Each time when the pushbutton is pressed the trigger source change in the sequence VERT CH 1 CH2 LINE EXT VERT VERT Vertical Mode For observing two waveforms the sync signal changes alternately corresponding to the signals on CH1 and CH2 to trigger the signal CH1 The signal applied to the channel 1 input connector is the source of the trigger signal CH2 The signal applied to the channel 2 input connector is the source of the trigger signal LINE The triggering signal is obtained from a sample of the AC power source waveform The trigger source is useful when the displayed waveform frequency is time related to the AC power source frequency EXT The external signal applied through the EXT input connector is used for the external triggering source signal GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 32 TV Pushbutton for video sync signal selection Separate the video sync signal from the composite waveform and direct i
19. IV 40ns DIV uncalibrated ALT MAG Function Available Trigger Modes AUTO NORM TV Trigger Source VERT MODE CH1 CH2 LINE EXT Trigger Coupling AC HER LFR TV V TV H Trigger Slope Trigger Sensitivity yo n or polarity GOS 6051 GOS 6050 Panel Setting Display CH1 CH2 sensitivity sweep time trigger condition Panel Setting Save amp Recall 10 sets GOS 605 1 6031 Cursor Measurement GOS 605 1 6031 Cursor Measurement Function AV AT 1 AT Cursor Resolution 1 25 DIV Effective Cursor Range Vertical 3 DIV Horizontal 4 DIV 20Hz 5MHz 5MHz 40MHz 40MHz SOMHz GOS 6031 GOS 6030 20Hz 2MHz 2MHz 20MHz 20MHz 30MHz TV sync pulse more than 1 DIV CH1 CH2 VERT MODE or 200mV EXT External Trigger Input Input impedance Approx 1M Q 25pF AC coupling Max input voltage 400V DC AC peak at 1kHz Hold off Time Variable Tae Display Digits Max 6 digits decimal Frequency Range 50Hz SOMHz GOS 6051 50Hz 30MHz GOS 6031 Frequency Counter Accuracy 0 05 50Hz 1kHz GOS 605 1 6031 0 01 1kHz 30 50MHz Measuring Sensitivity more than 2 DIV measuring source selected from CH1 or CH2 as synchronous signal source Voltage AC100V 120V 230V 10 selectable LINE ROWER Frequency 50Hz or 60Hz REQUIREMENT Power Consumption Approx 60VA
20. OS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL 1 PRODUCT INTRODUCTION 1 2 Features Additionally the oscilloscope offers several other features 1 1 Description 1 High intensity and internal graticule CRT The oscilloscope employs a high intensity 6 inch retangular type The GOS 6051 50 31 30 series are S0OMHz 30MHz two channel portable cathode ray tube with red internal graticule It displays clear readable oscilloscopes for general purpose use A microprocessor based operating traces even at high sweep speeds Internal graticule lines eliminate parallax viewing error between the trace and the graticule line 2 Frequency Counter GOS 605 1 6031 A built in 6 digits frequency counter is accurate within the range of system controls most of the functions of the instrument including cursor readout and digitized panel setting On screen alphanumeric readout and cursor function for voltage time and frequency measurement provide I 0 01 measuring frequency between 1kHz to 30 SOMHz and 0 05 measuring 50Hz to 1kHz 3 ALT MAG Function The primary sweep waveform along with the magnified sweep extraordinary operational convenience It also has the function of auto measurement for frequency and counter Ten different user defined instrument settings can be saved and recalled without restriction The vertical deflection system has two input channels Each ch
21. OSCILLOSCOPE USER MANUAL The deflection coefficients and additional information regarding the active channels are displayed in the readout VAR Pressing the VOLTS DIV control knob to select the VOLTS DIV function between attenuator and vernier variable The current setting is displayed by the gt symbol in the readout After switching on the VAR turn the VOLTS DIV control knob counterclockwise to reduce the signal height and the deflection coefficient becomes uncalibrated 19 CH1 AC DC 20 CH2 AC DC Pressing the pushbutton briefly to switch over from AC symbol to DC symbol input coupling The setting is displayed in the readout with the deflection coefficient 21 CH1 GND Px10 22 CH2 GND Px10 Pushbutton of two functions GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 23 CH1 X Input BNC socket This BNC socket is the signal input for channel 1 In X Y mode signals at this input are used for the X deflection The outer ground connection is galvanically connected to the instrument ground and consequently to the safety earth contact of the line mains plug 24 CH2 Y Input BNC socket This BNC socket is the signal input for channel 2 In X Y mode signals at this input are used for the Y deflection The outer ground connection is galvanically connected to the instrument ground and consequently to the safety earth contact of the line mains plug Horizontal controls
22. Test Equipment 99 Washington Street toect Depot Melrose MA 02176 H Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 571 8431 ve senses i esses sae GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL EC Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD 1 No 95 11 Pao Chung Rd Hsin Tien City Taipei Hsien Taiwan 2 Plot 522 Lorong Perusahaan Baru 3 Prai Industrial Estate 13600 Prai Penang Malaysia declares that the below mentioned product GOS 6031 GOS 6030 are 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 72 23 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive the following standards were applied EMC Directive 89 366 EEC amended by 92 31 EEC 93 68 EEC EMI EN 50081 1 N 55022 1998 EN 61000 3 2 A12 1996 EN 61000 3 3 1995 EMS EN 50082 1 1997 EMS EN 61326 1998 EN 61000 4 2 1995 IEC 1000 4 2 1995 N 61000 4 3 1996 IEC 1000 4 3 1995 N 61000 4 4 1995 IEC 1000 4 4 1995 N 61000 4 5 1995 IEC 1000 4 5 1995 N 61000 4 6 1996 IEC 1000 4 6 1996 N 61000 4 8 1993 IEC 1000 4 11 1994 N 61000 4 11 1994 E E E E E E Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC Safety Requi
23. V and AT measurement values will be displayed with divisions When the vertical mode is set to the ADD mode and the CH1 and CH2 VOLTS DIV controls are set to different scales the AV measurement values will be displayed with divisions 45 If the fuse blows the power lamp indicators will not light and the oscilloscope will not start The fuse should not normally open unless a problem has developed in the unit Try to determine and correct the cause of the blown fuse and replace only with a fuse of the correct rating and type on the rear panel WARNING For continued fire protection Replace fuse only with 250V fuse of the specified type and rating and disconnect power cord before replacing fuse 6 2 Line Voltage Conversion The primary winding of the power transformer is tapped to permit operation from 100 120 or 230VAC 50 60Hz line voltage Conversion from one line voltage to another is done by changing the line voltage selector switch as shown in page 7 The rear panel identifies the line voltage to which the unit was factory set To convert to a different line voltage perform the following procedure 1 Make sure the power cord is unplugged 2 Adjust the line voltage selector switch to the desired line voltage position 3 A change in line voltage may also require a corresponding change of fuse value Install the correct fuse value as listed on rear panel 44 Test Equipment Depot 800 517 843
24. al ADD waveform GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Comparing Frequency and phase X Y Operation To compare the frequency and phase between two signals by using the X Y mode The X Y waveform displays different amplitude frequency and phase The figure 5 7 shows a typical waveform made up of two signals that are of the same frequency and amplitude but approximate 45 out of phase To use the oscilloscope in the X Y mode proceed the following steps 1 Connect the horizontal or X axis signal to the CH1 input 2 Connect the vertical or Y axis signal to the CH2 input 3 Set the X Y button to X Y operation shown as Fig 5 7 below Use the HORIZONTAL POSITION control to adjust the X axis Note When high frequency signals are displayed in the X Y operation note the frequency bandwidths and phase difference between X and Y axis Refer to 2 SPECIFICATION section for details Figure 5 7 Typical single X Y display 377 a GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Magnifying Waveform Events Use the 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 MAG button proceed the following steps 1 Adjust the TIME DIV to the fastest sweep that displays the event 2 Rotate the HORIZONTAL POSITION control to move the event to display on the center of screen 3 Press the MAG button 4 Select
25. annel has 14 waveform can be displayed simultaneously using the ALT MAG basic deflection factors from ImV to 20V per division The horizontal function The magnification ratio can be selected from among three stages of x5 x10 x20 for magnifying the displayed waveform in the center of the CRT 4 Convenient VERT MODE Triggering deflection system provides sweep time from 0 5s to 0 2 ws per division The trigger system provides stable triggering over the full bandwidth of the vertical deflection system The sync signal source is decided automatically when vertical axis mode is switched This means that you need not change the trigger source every time you switch the VERT MODE 5 TV triggering Exclusive TV syne separator circuit technology provides stable TV signal measurements on fields frames and lines 6 Hold Off The function allows the obtaining of stable synchronization for even complex waveforms that are difficult to synchronized by adjusting the trigger level alone GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 7 CH1 Signal Output The CH1 signal output is obtained by branching the input signal in the middle of the signal line As the connector outputs the input signal at a rate of 50mV div connecting a frequency counter makes it possible to measure the frequency of a very low signal while observing its waveform 8 Z axis intensity modulation For applying a blanking signal from an external source The trace di
26. ating is shown in the section of 3 2 Checking the line voltage 39 AC power input connector Connect the AC power cord to the power supply of instrument the power cord protective ground connection is connected to the exposed metal part of the instrument The power cord must be connected to a proper grounded source for electrical shock protection 40 CH1 Output BNC socket This output may be used to connect to a frequency counter or other instrument Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 41 Z Axis Input BNC socket 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 GOS 605 1 6050 603 1 6030 OSCILLOSCOPE 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 5 1 Readout Display The CRT readout display indicates how to set up the instrument controls No physical marking shown on the rotating switches indicates the control setting A key to the location and
27. button illumination while turning the knob counterclockwise to decrease it When switch on the oscilloscope to have all LEDs lighted and wait a Pressing the knob to switch the TEXT ILLUM on or off few seconds the normal operation mode is present Then the last 8 CURSORS MEASUREMENT FUNCTION GOS 605 1 6031 settings become activated and the LED indicates ON condition There are two pushbutton and associated the VARIABLE 9 control 2 TRACE ROTATION knob The TRACE ROTATION is for aligning the horizontal trace in parallel AV AT 1 AT OFF Pushbutton with graticule lines This potentiometer can be adjusted with a small When the pushbutton is pressed the three measurement functions will screwdriver be selected in the sequence as follows Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL AV Two horizontal cursors appear The voltage between the two cursors is calculated according to the setting of VOLTS DIV and displayed with V on the upper side of the CRT AT Two vertical cursors appear The time between the two cursors is calculated according to the setting of TIME DIV and displayed with T on the upper side of the CRT 1 AT Two vertical cursors appear The reciprocal of the time frequency between the two cursors is calculated with 1 AT on the upper side of the CRT C1 C2 TRK Pushbutton Th
28. cess 35 5 6 Measurement Application ssccecececeecececeeceees 44 MAINTENANCE cccscceccecceceecseceecnsenscecesseesnees 46 6 1 Fuse Replacement ccscccccsccccccscecceceeecsscesoes 46 6 2 Line Voltage Conversion csccececsscececeesecesseees 46 6 3 CleaMing sesescececcccecccececcesecessesesessesesseseses 47 BLOCK DIAGRAM ccccecscceceecceceeceeceesescescee sess 48 GOS 605 1 6050 603 1 6030 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 practices that could result in damage to this product or CAUTION Caution statements identify conditions or other property The following symbols may appear in this manual or on the product A A A DANGER ATTENTION Protective Earth ground High Voltage refer to Manual Conductor Terminal Terminal GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 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
29. e cursor 1 cursor 2 and tracking can be selected by this button Pressing the pushbutton to select the cursors in sequence as follows C1 Moves the cursor 1 on the CRT W or Pp symbol is displayed C2 Moves the cursor 2 on the CRT W or PW symbol is displayed TRK Simultaneously moves the cursor 1 and cursor 2 with the interval between the two cursors unchanged both symbol are displayed at the two cursors 9 VARIABLE Set the cursor position TEXT ILLUM etc by turning or pressing the VARIABLE knob In the cursor mode pressing the VARIABLE control knob to select the cursor position between FINE and COARSE adjustment When select FINE adjustment by turning the VARIABLE the cursor lines will move slowly If select COARSE adjustment he cursor will move fast In TEXT ILLUM mode this control knob can be used to set the text intensity or illumination Please refer to TXT ILLUM 7 for details GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 10 MEMO 9P SAVE RECALL GOS 6051 6031 The instrument contains 10 non volatile memories which can be used by the operator to save instrument setting and to recall them It relates to all controls which are electronically selected Press lt Q orp pushbutton to select the memory location The readout then indicates the letter M followed by a cipher between 0 and 9 Each time the W pushbutton is briefly pressed the memory location cipher increases until the number 9 is r
30. eached The lt Q pushbutton is similar but decreases the memory location cipher until the number 0 is reached Pressing and holding SAVE for approx 3 seconds to write the instrument settings in the memory and indicate the associated readout information of ql gt To recall a front panel setup select a memory location as described above Recall the settings by pressing and holding the RECALL pushbutton for approx 3 seconds the readout then indicates the associated readout information of me GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL Vertical controls 15 ALT CHOP The vertical controls select the displayed signals and control the amplitude The pushbutton has two functions which are required and available characteristics only when both channels are active ALT Displays in the readout indicates alternate channel switching After each time base sweeps the instrument internally switches over from channel and channel 2 and vice versa 1 L CHOP Indicates chopper 1 5 Gy woureyory f wours o04 J 2 The channel switching occurs constantly between channel 1 and 1 5 NG 2 xX 18 channel 2 during each sweep F 9 a 16 ADD INV Pushbutton with double functions a L at 20 ADD Displays the symbol in the readout indicates additional E ioe 2 2 mode ee Whether the algebraic sum addition or the difference subtraction of 23 2
31. ely 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 3 2 Checking the Line Voltage Ensure there is proper ventilation for the vents in the oscilloscope case If The oscilloscope can be applied any kind of line voltage shown in the the equipment is used not according to the specification the protection table below Before connecting the power plug to an AC line outlet make provided by the equipment may be impaired sure the voltage selector of the rear panel is set to the correct position 3 5 CRT Intensity corresponding to the line voltage It might be damaged the instrument if To prevent permanent damage to the CRT phosphor do not make the CRT connected to the wrong AC line voltage 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 WARNING To avoid electrical shock the power cord protective grounding conductor must be connected to ground Input terminals are shown in the following table Do not apply voltages When line voltages are changed replace the required fuses shown as below higher than these limits Range Fuse Input terminal Maximum input voltage 100V
32. es before using them The probe compensation should be checked periodically whenever the probes are moved to different input channels 1 Install the probes onto the oscilloscope Press the BNC connector onto the channel input and rotate the connector to lock it into place 2 Set the probe slide switches to the x10 position 3 Briefly pressing the CH1 CH2 button to set the oscilloscope to channel 1 and channel 2 4 Pressing and holding the Px10 button to set the indicated deflection coefficient of the channel displayed in the readout as a symbol P10 5 Attach the probe tips to the CAL connection in the front of the oscilloscope 6 Set the oscilloscope controls to display both channels VERTICAL VOLTS DIV 0 2V COUPLING DC ALT CHOP CHOP HORIZONTAL TIME DIV 0 5ms TRIGGER MODE ATO SOURCE VERT COUPLING AC SLOPE GOS 6051 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 7 Observe the displayed waveform and compare them with the waveforms shown in figure 5 2 If either probe needs to be adjusted proceed the step 8 If either probe does not need to be adjusted proceed the Function Check Over Compensated T ea E Under Compensated Correctly Compensated Figure 5 2 Typical Compensation Waveform 8 Adjust the probe by using a small insulated screwdriver Slowly rotate the adjustment control until the probe is properly compensated GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL
33. ff is set to minimum Figure 5 10 b shows the undesirable portion of the signal is held off The same waveforms are displayed on the screen without overlapping digital signal cycle Highlighted parts are displayed Sweep waveform Figure 5 10 a Adjusting the HOLDOFF time Figure 5 10 b A0 Ze GOS 605 1 6050 603 1 6030 OSCILLOSCOPE GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL USER MANUAL Observing the Synchronization of two Waveforms The VERT MODE triggering is not possible when the signal is applied When two signals of the CH1 and CH2 have the same frequencies with an only to one channel as shown in Figure 5 12 below integral number or a specific time difference the SOURCE selects either CH1 or CH2 as a reference signal Select CH1 signal from CH1 position and select CH2 signal from CH2 position as a reference Set the SOURCE to VERT MODE for observing the signal of different frequencies Switch the sync signal alternately to each channel the waveform of each channel will be triggered stably When set the SOURCE to VERT MODE and set the ALT CHOP to ALT the input signals applied to CH1 and CH2 will become trigger source alternately during sweep Consequently even the waveforms of different frequency of each channel can be triggered stably Figure 5 12 Trig Source on VERT one channel Apply a sine wave to CH1 and a square wave to CH2 A s shown in Figure 5 11 are at the
34. nd Figure 5 14 b shows horizontal signal of TV H Figure 5 14 a TV V Figure 5 14 b TV H The figure 5 15 shows the examples of TV polarity synchronization signals Note This oscilloscope synchronizes with only J synchronizing signal REFERENCE Synchronizing Video signal signal Video sone Synchronizing signal a Figure 5 15 TV Signal GOS 6051 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 5 6 Measurement Application GOS 6051 6031 The oscilloscope has a cursor measurement system for making accurate direct readout voltage time and frequency measurements The measurements described in this section are examples of typical applications using this measurement system After becoming familiar with the controls indicators and capabilities of the instrument you can develop convenient methods to make the special measurement for your own applications Proceed a measurement by using the cursor according to the following steps 1 Press the A V AT 1 AT OFF pushbuttons to turn on the cursor and measurement readout 2 Press the pushbutton to select the seven measurement function in the sequence as below AV AT 1 AT OFF 3 Press the C1 C2 TRK pushbutton to select C1 W cursor C2 V cursor and tracking cursor 4 Rotate the VARIABLE control knob to position selected cursor Press one of the VARIABLE control knob to select FINE or COARSE cursor move speed 5 Read the measurement
35. rements EN 61010 1 1993 A2 1995 GOS 6051 6050 603 1 6030 OSCILLOSCOPE USER MANUAL CONTENTS PAGE PRODUCT INTRODUCTION sssessssesessesceeesceoosseeceseseeesseeessee 1 1 1 Description cccecccceccecccccscceccesccecssceseesesees 1 1 2 a ess con csievedsiedcesencesedes ese csen seen cesenassavavessaseipases 2 TECHNICAL SPECIFICATIONG ccecceeeeeeeveeees 4 PRECAUTIONS BEFORE OPERATION 000e0se00 7 3 1 Unpacking the Oscilloscope sccsessececececeeceees 7 3 2 Checking the Line Voltage csessscssseecsecesessees 7 3 3 EMVirOMnMent cccccecccecscecscecscececcsecessssseeeees 8 3 4 Equipment Installation and Operation 0 s0 8 3 5 CRT Intensity cccccccsccscecccesecccececcescescensees 8 3 6 Withstanding Voltage of Input Terminals 8 PANEL INTRODUCTION scceessessscsseeceesessee ees 8 4 1 Front Panel csccsccscccccsccsccscccccseesesseesesees 11 4 2 Rear Panel sccccessessssececesscsecessesseseseseseeseeess 26 OPERATION METHOD sseseseseereresresreereeeesseeseeeees 28 5 1 Readout Display cccsccecscsssecsceesecescese seen sees 28 5 2 Connecting Input Sigmals scseccesecsesssecesseees 30 5 3 Adjustment and Checks scssecsececscccceceveseeees 31 5 4 Function Check csscecscescsceccccscececececeeceesese 33 5 5 Basic Operation ssscsssecscccccsccscescescesceneess
36. splayed on the screen may be intensity modulated where pulse signal or time scale marks are required 9 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 10 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 route on the pe board This will also greatly increase the high frequency performance and the reliability of the product 11 Compact size 275Wx130Hx370D mm and front panel layout groups for easy to use GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 2 TECHNICAL SPECIFICATIONS CRT VERTICAL SYSTEM Accelerating Potential 6 inch rectangular type with internal graticule 0 10 90 and 100 markers 8 x 10 DIV 1 DIV 1 cm Approx 10kV GOS 6051 6050 2kV GOS 6031 6030 INTEN and FOCUS Front panel control Illumination Trace Rotation Z axis Input Sensitivity Accuracy ImV 2mV DIV 5 5mV 20V DIV 3 14 Provided GOS 605 1 6031 Provided Sensitivity at least 5V Polarity positive going input decrease intensity Usable frequency range DC to 2MHz Max input voltage 30V DC AC peak at 1kHz or less Input Impedance approx 33k Q GOS 605 1 6050 47k Q GOS 603 1 6030
37. t to the triggering circuit The horizontal or vertical sync signals are selected by TV pushbutton The current setting is displayed in the readout under item source video polarity TVV or TVH Each time when the pushbutton is pressed the video sync signal is displayed in the sequences as follows TV V TV H OFF TV V TV V Start the main trace at the beginning of a video signal field The polarity must match the composite sync polarity i e LI for negative sync to obtain TV field triggering on the vertical sync pulse TV H Start the main trace at the beginning of a video signal line The polarity must match the composite sync polarity to obtain TV line triggering on the horizontal sync pulse 33 SLOPE Pushbutton for the triggering slope Briefly pressing the pushbutton to select the slope of the signal which is used for triggering the time base generator Each time when the pushbutton is briefly pressed the slope direction will switch from falling edge to rising edge and vice versa The current setting is displayed in the readout under item source SLOPE coupling If in the TV trigger mode it is synchronized only when the sync signal is negative A Symbol is displayed in the readout GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 34 COUPLING Pressing the pushbutton to select the trigger coupling The actual setting is indicated by the readout source slope COUPLING
38. th the center of the CRT The magnification ratio can be selected from among three stage of x5 x10 x20 MAG by pressing this pushbutton ALT MAG Pressing the pushbutton the primary sweep waveform along with the magnified sweep waveform The magnified can be displayed simultaneously using the ALT MAG function The magnified sweep waveform appears 3 divisions below the primary sweep waveform Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL Trigger controls The trigger controls determine the sweep start timing for both signal LEVEL 31 Oe ec A N TV SOURCE 3 2 HOLDOFF PN SLOPE COUPLING IN poh 33 j NE 36 iiaa 3 MIN S7 iiaa d Ye 3 4 i EXT TRIG ne 1MW 25pF Y fo 300v caT 7 Al MAX 400Vpk 30 ATO NML Pushbutton and indicator LEDs Pressing the pushbutton to select auto or normal trigger mode The actual setting is indicated by a LED Each time when the pushbutton is pressed the trigger mode changes in the sequence ATO NML ATO ATO Auto Select the automatical mode the sweep free runs will display a baseline trace when there is no trigger signal The setting of triggering level changed only when the TRIGGER LEVEL control is adjusted to a new level setting NML Normal Select the normal mode the input signal will trigger the sweep when the TRIGG
39. the changing portion of the observation waveform the synchronization sweep stops TRG LED The TRG LED is lit if the triggering conditions are met Whether the LED flashes or is lit constantly depends on the frequency of the trigger signal 36 HOLD OFF Control knob Used when the signal waveform is complex and stable triggering cannot be attained with the TRIGGER LEVEL 35 knob alone rotate this control knob to adjust hold off time trigger inhibit period beyond sweep duration When control is rotated fully clockwise the hold off period is at MINimum normal The hold off period increases progressively with counterclockwise rotation 37 TRIG EXT This BNC socket is the external trigger signal input Pressing the TRIG SOURCE 31 pushbutton until the information of EXT slope coupling is shown up in the readout switches the input on The outer ground connection is galvanically connected to the instrument ground and consequently to the safety earth contact of the line mains plug The maximum input voltages of the input terminal are shown in the section of 3 6 Withstanding voltage of Input terminals Do not apply voltage higher than the limit GOS 605 1 6050 603 1 6030 OSCILLOSCOPE USER MANUAL 4 2 Rear Panel The rear panel provides input power and additional signal connections 38 39 38 Line voltage selector and input fuse holder Select power source and contain the primary power fuse The fuse r
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