Oscilloscope can be used in many fields. When using, you may run into some problems. Here are the possible reasons of some shared problems.
1. No identify or wave shape
The strength isn’t connected.
The brightness knob isn’t modificated well.
The shift knob of X or Y axis is at a slanting position.
The balance potentiometer of the Y axis isn’t modificated properly, which results in a serious imbalance in the DC amplifier.
2. The horizontal waveform can’t be shown.
cause selective switch is turned to the outside and no external cause signal is input, which consequence in no sawtooth wave (STW).
Level knob doesn’t adjust properly.
The stability potentiometer doesn’t adjust to the basic state that enables the scanning circuit to be triggered.
The X-axis selection is wrongly put in the external position and no external signal is input to the socket.
For two-channel oscilloscope, if only Channel A is used (no input signal in Channel B), and the cause switch is pulled to the location of YB, there will be no STW.
3. The vertical waveform can’t be shown.
Input DC-coupling ground-AC switch was wrongly put in ground position.
The high and low possible ends of the input are at the anti-termination of that of the circuit.
Input signal is too small and the V/div is wrongly pulled to low sensitivity level.
4. The wave isn’t stable.
The stability potentiometer is over-rotated clockwisely, resulting in scanning circuit under a self-excitation scanning position but not a basic state to be triggered.
cause coupling AC, AC (H), DC switches aren’t chosen the correct levels according to different signal frequency.
When the high-frequency cause state is chosen, the cause selector switch is mistakenly placed outside the file.
Some oscilloscope will characterize instable wave when scanning under the automatic transmission.
5. Vertical lines are too intensive or displayed as a rectangular.
t / div switch isn’t chosen properly, resulting in f examine too lower than f Signal.
6. Horizontal lines are too intensive or displayed as a tilt line horizontally.
t / div switch isn’t chosen properly, resulting in f examine too higher than f signal.
7. AM waveform disorders.
t/div switch is improperly chosen, resulting in incorrect scanning frequency that is chosen according to the amplitude selection frequency but not the audio amplitude modulation signal frequency.
As operators may without knowledge of the principles of oscilloscope and oscilloscope’s control panels, they may encounter many problems when using. Knowing them ahead will be a great help.