24-04-2014, 12:37 PM
oscilloscope
oscilloscope.ppt (Size: 458.5 KB / Downloads: 108)
Introduction
A graph-displaying device of electrical signal
X axis: Time
Y axis: Voltage
Z axis: Intensity or brightness
Information given by oscilloscopes
Time and voltage
Frequency and phase
DC and AC components
Spectral analysis
Rise and fall time
Mathematical analysis
Basic setting
Vertical system
attenuation or amplification of signal (volts/div)
Horizontal system
The Time base (sec/div)
Trigger system
To stabilize a repeating signal and to trigger on a single event
Advantage of Digital Scope
Trend towards digital.
Easy to use.
One-shot measurement
Recoding
Triggering
Data reuse
Connectivity
Passive probe
10 attenuation
Good for low circuit loading
Suitable to high frequency signal
Difficult to measure less than 10mV signals
1attenuation
Good for small signals
Introducing more interference