Voltcraft AO-610 10MHZ OSCILLOSCOPE USER’S MANUAL
CONTENTS 1. SAFETY PRECAUTIONS 2. SPECIFICATIONS 2.1 VERTICAL SYSTEM 2.2 TRIGGER SYSTEM 2.3 HORIZONTAL SYSTEM 2.4 X-Y MODE 2.5 CALIBRATION 2.6 CRT 2.7 POWER SOURCE 2.8 PHYSICAL FEATURES 2.9 WORKING ENVIRONMENT 2.10 PRESSURE-PROOF TEST 3. CONTROL AND INDICATORS 3.1 CONTROL PANEL POSITION 3.2 FUNCTIONS OF CONTROL SWITCHES 3.3 OPERATING INSTRUCTIONS 4. MEASUREMENT 4.1 EXAMINATION AND ADJUSTMENT BEFORE TAKING MEASUREMENTS 4.
1. SAFETY PRECAUTION The A oscilloscope is easy to operate and highly reliable. It is an ideal instrument for research, production, education, and development. It is a compact and portable oscilloscope with a frequency bandwidth of 10MHz and sensitivity of 5mV/DIV-5V/DIV. Supplied as standard, with a switchable X10: X1 probe which extends the sensitivity up to 50V/div. The horizontal timebase is 0.1S/DIV to 0.1µS/DIV.
dangerous and should be strictly avoided. Take care not to allow water to get into this instrument. The use of this instrument in a wet state could result in electrical shock or fire. If water or other foreign matter has penetrated this instrument, first switch the power off, remove the power cord and call for repair. Do not place this instrument on an unstable or slanting surface . The dropping or turning over of this instrument could result in electrical shock, injury or fire.
2.4 X-Y MODE Sensitivity Bandwidth(-3dB) 2.5 CALIBRATION SIGNAL Waveform Range Frequency 2.6 CRT Display Area Accelerating Voltage Display Color 2.7 POWER SOURCE Voltage Range Frequency Power Consumption 2.8 PHYSICAL FEATURES Weight Dimensions (H x W x D) 2.9 WORKING ENVIRONMENT Working temperature Storage Environment Working Altitude 2.10 PRESSURE-PROOF TEST Pressure-proof test 0.2V/DIV〜0.5V/DIV DC: 0~1MHz AC: 10Hz~1MHz Symmetric Square Wave 05.
3. CONTROL AND INDICATORS 3.1 Control Panel Position 3.1.1 Front Panel Fig 3-1 3.1.
3.2 FUNCTIONS OF CONTROL SWITCHES NO. 1 2 3 4 5 6 7 SWITCHES POWER SWITCH POWER LIGHT INTENSITY FOCUS CALIBRATION TIME/DIV Horizontal POSITION 8 HORIZONTAL VAR 9 LEVEL 10 +/TV 11 12 13 14 15 16 17 18 19 20 FUNCTIONS Power on/off Lights when power on Controls brightness of display After obtaining appropriate brightness with INTENSITY, adjust FOCUS for clearest line Provide symmetric square wave for 0.5V range, frequency=1KHz.
3.3 OPERATING INSTRUCTIONS 3.3.1 VOLTAGE CHECKING A oscilloscope is set for 110V±10% , 220V ±10% voltage. Before connecting the unit to the mains supply, make sure that the correct voltage is being used. Incorrect mains voltage may cause damage to the instrument. 3.3.2 BASIC OPERATION (1) POSITION FOR CONTROL SWITCHES CONTROL SWITCHES POSITION INTENSITY [3] Center FOCUS [4] Center POSITION [7] [16] Center VOLTS/DIV [15] 0.1V VAR [8] [17] Calibration position AUTO/NORM [11] Auto TIME/DIV [6] 0.
Fig 3-3 3.3.3 VERTICAL SYSTEM OPERATION (1) VOLTS/DIV switch should be turned to the correct position following the input signal range. Adjust position [16] to show the whole waveform within the available area. Adjust with VAR [17] if necessarily, trimming ratio is 2.5:1. (2) Input coupling options: “DC”is used for observing a signal with a direct current content such as logic or static signals, “DC” must be used with low frequency. “AC” is used for observing the AC component of signals.
free run waveform requires a frequency higher than 20Hz; [11] “NORM”while waiting for sweep with no trace. When an input signal occurs the scope is triggered to sweep (3) and show the waveform . [10] “TV” used to determine TV signals. (4) SLOPE selection: Used to select whether the trigger signal crosses trigger level in a positive or a negative-going direction. (5) Level setup : Use to adjust signal sweep on a level at a starting reference. 3.3.
shown in figure 4.1 (5) Observe the waveform compensation and adjust the LF compensation controls as shown in figure 4-2 Good Compensate Over Compensate Fig 4-1 Under Compensate LF COMP Fig 4-2 4.2 MEASUREMENT 4.2.1P-P Voltage Measurements Step : (1) Input signal to INPUT [19] terminal. (2) Setup VOLTS/DIV and observe waveform, set waveform display on the screen within 5 divisions, and turn VAR clockwise to the calibration position. (3) Adjust level to make waveform steady.
(5) Adjust vertical position to ensure the bottom of waveform lies on a horizontal axis on the screen. Fig 4-3A. (6) Adjust horizontal position to ensure the top of waveform lies center of vertical axis. Fig 4-3B. (7) Read the divisions between A-B on vertical direction. (8) Calculate the signal Vp-p using the formula below : Vp-p= DIV of vertical direction× Sensitivity For example, In Fig 4-3, vertical divisions of A-B is 4.1 DIV, sensitivity of the 10:1 probe is 2V/DIV, then Vp-p=2×4.1=8.
Fig 4-4 Level A Zero-volt Reference B Level 4.3 TIME MEASUREMENTS 4.3.1 TIME SPACE MEASUREMENTS This is a procedure for making time (period) measurements between two points on a waveform: (1) Connect the signal to be measured to the input terminal [19]. (2) Adjust level to obtain steady waveform. (3) Turn VAR clockwise to the calibration position, and set sweep controls to obtain a normal display of 1-2 signal cycles.
4.3.2 CYCLE & FREQUENCY MEASUREMENTS Shown in Fig 4-6, frequency measurements are made by measuring the time period of one cycle of waveform (T), and calculating the frequency that equals the reciprocal of the time period. For example, T=16µS, then frequency is: 1 F =1/T = ------------------ = 62.5 KHz 16 ×10-6 4.3.3 PULSE RISE TIME AND FALL TIME MEASUREMENTS For rise time and fall time measurements, the 10% and 90% amplitude points are used as starting and ending reference points.
4.4 TV Signals measurement Steps : (1) Connect TV signals to INPUT jack [19] (2) Set Trigger method to “TV” [10], Sweep switch turn to 2mS/Div. (3) Observe the screen, it should be negative synchronize pulse wave. (4) Adjust VOLTS/DIV and VAR to obtain proper range. 4.5 X– Y mode applications There are some cases which X axis requires control from external signals, e.g. external connection of sweep signals, signals of Lissajous patterns or other equipment’s display setup.
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