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5  Horizontal system 

5.1

 

Time base 

The  time  base  refers  to  the  time  represented  by  each  grid  in  the  horizontal 

direction on the oscilloscope screen. There are 12 grids in the horizontal direction of 
the oscilloscope. The sampling time that can be observed on the screen = " time base" 
*  12.The  user  can  estimate  the  signal  period  by  observing  how  many  grids  a 
waveform period occupies. For example, the current time base is 500us, and one cycle 
of the signal occupies 2 grids,so the signal period is 1ms (1KHz).

 

The oscilloscope time base range is 5ns ~ 10s. The buttons for adjusting the time 

base  in  the  oscilloscope  button  panel  are  '

ns

'  and  '

s

'  button.

When  observing 

high-frequency  signals,  you  should  press  the  'ns'  button  to  decrease  the  time  base. 
When  observing  low-frequency  signals,  you  should  press  the  's'  button  Increase the 
base

.The time base in the figure is 200us/div.   

What you need to know is that the sampling process of the oscilloscope is: 

"Sampling">>"Processing" >> "Display" 

When  adjusted  to  a  large  time  base,  the  screen  waveform  refresh  will  be  slow 

due to the longer time taken by the oscilloscope to sample the waveform.

 

5.2

 

Horizontally moving waveform 

  In the stop mode, the user can move the waveform left and right.

 

 

6  Trigger system 

About trigger 

The  oscilloscope  will  capture  a  frame  of  waveform  only  after  the  waveform 

Summary of Contents for DSO3D12

Page 1: ...DSO3D12 User s Manual Designed by ZEEWEII DIGITAL OSCILLOSCOPE...

Page 2: ...de is normal Trigger edge Rising edge trigger or falling edge trigger Battery level indication Trigger level position X1 X10 indicates probe attenuation which should be set to match the probe The goal...

Page 3: ...eform 50 Quick centering CH1 DMM Turn the multimeter on off Press Shift DMM to full screen Select Multimeter function selection mV V Adjust vertical sensitivity voltage of one grid s ns Adjust the tim...

Page 4: ...connected the oscilloscope automatically adjusts the range in real time Press any key to exit Shift V ch1 Turn on off the voice assistant 1 Safety Precautions High voltage The x10 range of the probe...

Page 5: ...anual adjustment mV V buttons scale the waveform vertically The s ns button scales the waveform horizontally The vertical sensitivity indicates the voltage of a grid in the vertical direction and it i...

Page 6: ...set the high priority of channel 2 pay attention to the change of the 1 2 icon in the upper left corner When not using dual channel measurements Channel 2 should be turned off for higher sample rates...

Page 7: ...s 3 4 1 Large input capacitance Because the probe 1X has a large input capacitance usually more than 100 pf it is not suitable for measuring some capacitively sensitive circuits For example when measu...

Page 8: ...f the signal by observing how many divisions the waveform occupies on the screen For example if the vertical sensitivity is 1v div and the signal occupies 3 grids on the screen you can know that the a...

Page 9: ...for adjusting the time base in the oscilloscope button panel are ns and s button When observing high frequency signals you should press the ns button to decrease the time base When observing low freq...

Page 10: ...The arrow circled above is the trigger level position and when the edge of the square wave in the above figure passes upwards through the position of this arrow a trigger is formed the waveform only...

Page 11: ...ancel a single trigger click Stop to stop Procedure 1 Connect the signal first 2 mV V set the voltage sensitivity s ns set the time base 3 Set the trigger level to manual and adjust the trigger level...

Page 12: ...exit can adjust the duty cycle other waveforms do not work When the set frequency is greater than 1MHz the square wave signal may show small horizontal jitter Single dual channel button to turn on off...

Page 13: ...e 1X 8 2 Measurement There are 14 measurement options available as shown below Frequency Peak to Peak Duty cycle Amplitude RMS Average Period Pulse width Pulse width Max Min Top Base Duty cycle The di...

Page 14: ...emain on the screen for a while and then disappear Optional persistence options are None 1s Infinite When Infinity is selected the waveforms that have appeared on the screen will remain forever and wi...

Page 15: ...Support Equivalent sample 500M Screenshot Support Rise time 3ns Frequency 0 01 Storage depth 64K Single Support Impedance 1M FFT Support Time base 5ns 10s Wave out amp 2 5V 0 05 Ver sensitivity 10mV...

Page 16: ...ice speech rate accent etc we cannot guarantee the accuracy of recognition Wake up command Hello ZEEWEII Pronounced Hello see wave or Hello mini scope Command words function Auto setting It is equival...

Page 17: ...w do I reset the device to its initial state Answer Open Menu Set and then long press the Auto button to reset 1 What is the difference between probe 1X and 10X Answer The 1X does not attenuate the si...

Page 18: ...cted to the audio output The time base is adjusted to about 1 10ms and the voltage sensitivity is adjusted to about 500mV decided according to the volume 6 How to measure main board communication sign...

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