Figure 3: Connection Of Voltage Division And Error Inspection; Figure 4: Connection Of Voltage Measurement And Error Inspection - Owon SDS Series Service Manual

Section 3: Test and Calibration
Tested oscilloscope
Oscilloscope calibration
Output square scale
CH1-BNC
Q9 connection
voltage division and error inspection
Figure 3: Connection of
B. Make the calibration to output the impulse 1KHz and change base output amplitude and voltage
scaling factor, the height of the waveform displayed takes 80% of the checked work spare in the
oscilloscope screen (usually 6 grids). Pressing "V ERROR" and adjust the fine-tuning knob until
the upper and lower base line and horizontal scale full of coincidence, the error displayed on the
calibration is the error of the voltage division. (S03A oscilloscope is pointer header that the
indicated value is the correct value of the error of sweep rate, base error is anti-symbol.)
C. Repeat step B and test voltage division for each channel.
3.3.5 Voltage measurement and error inspection
A. As shown by Figure 3.connected:
B: Make the calibration to output amplitude A of square wave 1 KHz, press "Autoset" and adjust
to display the stable waveforms. Set the measured window 1 as the peak-peak value of Channel 1
and read the period value B, then get the voltage measurement error C as follows:
C=（B－A）÷A×100%
C. Repeat step B and check voltage measurement error for every channel.
3.3.6 Bandwidth inspection
A. As shown by Figure 4 connected:
Tested oscilloscope
Signal generator
Output sine wave
CH1-BNC
Q9 connection
voltage measurement and error inspection
Figure 4: Connection of
B. Regulate the signal generator to output continuous sine wave, adjust output voltage and
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