6-12
Figure 6-14.—Dual-trace oscilloscope.
The oscilloscope in figure 6-14 is called DUAL-TRACE because it can accept and display two
vertical signal inputs at the same time—usually for comparison of the two signals or one signal and a
reference signal. This scope can also accept just one input. In this case, it is used as a SINGLE-TRACE
OSCILLOSCOPE. For the following discussion, we will consider this to be a single-trace oscilloscope.
The oscilloscope in the figure is commonly used in the fleet. You are likely to use this one (model
AN/USM-425) or one very similar to it. Let's now look at the front panel controls.
COMPONENTS USED TO DISPLAY THE WAVEFORM
The CRT DISPLAY SCREEN is used to display the signal (figure 6-15). It allows you to make
accurate measurements using the vertical and horizontal graticules, as discussed earlier.
