The oscilloscope can be used in many fields. When using it, you may have some problems. Here are the possible reasons for some common problems.
1. No smudge or waveform
The power is not connected.
The brightness knob is not adjusted properly.
The shift knob for the X or Y axis is in a tilted position.
The Y-axis balance potentiometer is not adjusted correctly, resulting in a serious imbalance in the DC amplifier.
two. Cannot display horizontal waveform.
The selective trigger switch is turned outward and no external trigger signal is received, resulting in a sawtooth wave (STW).
The level knob is not adjusted correctly.
The stability potentiometer is not set to the critical state that allows the scan circuit to activate.
The X-axis selection is misplaced in the external position and no external signal is being input to the socket.
In order to two channel oscilloscope, if only channel A is used (there is no input signal on channel B), and the trigger switch is set to the YB location, there will be no STW.
3. Cannot display vertical waveform.
The AC-ground switch of the input DC coupling was incorrectly set to the ground position.
The high and low potential ends of the input are at the anti-termination of the circuit.
The input signal is too small and the V / div has been incorrectly set to a low sensitivity level.
Four. The wave is not stable.
The stability potentiometer rotates excessively clockwise, resulting in a scan circuit in a self-excited scan state, but not in a critical state to turn on.
Trigger coupling AC, AC (H) and DC switches are not selected at the correct levels according to the frequency of the different signal.
When the high-frequency trigger state is selected, the trigger selector switch is mistakenly set outside the file.
Some oscilloscopes will show an unstable waveform when scanning under the automatic transmission.
5. Vertical lines are too strong or appear rectangular.
The t / div switch is not selected correctly, resulting in a scan of f too low than the f signal.
6. Horizontal lines are too strong or appear as a slant line horizontally.
The t / div switch is not selected correctly, causing the f scan to be too high than the f signal.
7. AM waveform disorders.
The t / div switch is incorrectly selected, resulting in an incorrect scan frequency that is selected according to the amplitude selection frequency but not the frequency of the audio amplitude modulation signal.
Since operators may not know the principles of oscilloscopes and oscilloscope control panels, they may encounter many problems when using them. Knowing them in the future will be of great help.