The Tektronix TDS380 oscilloscope's simple graph can bl you many things about a signal, such as: the time and voltage values of a signal, the frequency of an oscillating signal, the 搈oving parts?of a circuit represented by the signal, the frequency with which a particular portion of the signal is occurring relative to, other portions, whether or not a malfunctioning component is distorting the signal, how much of a signal is direct current (DC) or alternating current (AC) and how much of the signal is noise and whether the noise is changing with time.

Perbance Characteristics of the TDS380
Form Factor Benchtop 
Bandb 400 MHz 
Number of Channels 2 ch 
Simultaneous Channels 2 ch 
Simultaneous Maximum Sampling Rate/ch 2 GSa/s 
One ch. only max. sampling rate 2 GSa/s 
Max. Record Length 1000 pt/sec 
Min. Vertical Sensitivity 2 mV/div 
Maximum Vertical Sensitivity 10 V/div 
Number of Bits 8 bits 
Main time base - lowest 1 ns/div 
Main time base - highest 5 s/div 
Timebase accuracy 0.01 % 
Trigger Source External,Internal 
Display modes Dot,Vector