Figure 4-2. Examples of oscilloscope traces of I kHz test tone signal to white noise interference levels.

TM 11-490-5

Figure 4-2. Examples of oscilloscope traces of I kHz test tone signal to white noise interference levels.

as evenly distributed throughout the electromagnetic

(b ) Random noise. An oscilloscope tracing of this

spectrum as white noise, the effect is much the same.

type of interference, which is similar to white noise, is

The effect shown in figure 4-3 is that of random noise at

shown in figure 4-3. At a jamming station, the noise is

approximately the same power level as the analog

originated from the modulation of a jamming transmitter

signal and would be heard as a hissing sound

by a random noise generator. While not "white" in the

completely blocking out the signal.

sense that the energy is not

4-8