In conclusion, to use an analog oscilloscope, you need to adjust three basic settings to accommodate an incoming signal:· The attenuation or amplification of the signal. Use the volts/div control to adjust the amplitude of the signal before it is applied to the vertical deflection plates.· The time base. Use the sec/div control to set the amount of time per division represented horizontally across the screen.· The triggering of the oscilloscope. Use the trigger level to stabilize a repeating signal.Also, adjusting the focus and intensity controls enables you to create a sharp, visible display.

_____, the train started. A: The signal given B: Giving the signal C: The signal being given D: The signal giving

2. Railway signals can be divided into home signal, starting signal, distant signal, repeating signal and shunting signal.

In addition to reinforcing the central idea, a speech conclusion should also __________. A: Signal the end of the speech B: Secure the audience’s attention C: Build your credibility as a speaker D: Reveal the topic of the speech

what is an analog signal? A: Analog signal is a continous values B: Analog signal is a discrete values C: Analog signal is sometimes continous,sometimes discrete

________, the train started. A: The signal given B: After the signal was given C: Given the signal D: A and B

According to the meaning of stop signal, it is divided into absolute signal and _____.

According to the meaning of stop signal, it is divided into absolute signal and （ ）. A: clea B: permissive signal C: estricting D: approach

According to the meaning of stop signal, it is divided into absolute signal and permissive signal.

signal