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

 

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TM-11-490-5 Army Communications Facilities Operational Electromagnetic Compatability Manual
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Figure 4-3. Examples of oscilloscope traces of an analog signal with various types of interference.


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


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