railway RRB JE (CBT I + CBT II) Mock Test 2024 Electronic Mechanic Measuring Instruments Cathode Ray Oscilloscope
The function of a trigger level knob on a CRO is:
1
To change the sweep speeds of time base
2
To change the length of time base
3
To change the intensity of the trace
4
To change the level of the input signal required to get stable display on the scope of the selected channel