FRAME 4
PART D - TYPES OF JAMMING SIGNALS
It is important for a radio operator to distinguish jamming signals from other types of
interference. Therefore, each operator should become familiar with the characteristic sounds of
jamming signals.
Included among the types of jamming signals are spark, random noise, sweep-
through, stepped-tone, various CW-based signals, beat tones, babbled voices, recorded music,
and assorted other sounds.
It can be assumed that unfriendly forces are constantly trying to perfect and use new
and more confusing forms of jamming signals.
1-21. The spark jamming signal is one of the simplest and easiest produced of all jamming
signals. To the operator, spark jamming appears to be a loud burst of noise of short duration and
high intensity, usually repeated at a rapid rate.
Because of the rapid repetition rate and time required for the receiver, earphones, and
human ear to recover from the loud burst of noise, the _________________ jamming signal is
very effective.
(1-21. Answer: spark)
1-22. The spark signal has a broadband characteristic that makes it possible for a single jammer
to cause the interference on several adjacent communications channels. Thus, a spark jamming
signal can be identified by a _________________ burst of noise of short duration and high
intensity that can jam several _________________ __________________________________.
(1-22. Answer: loud, adjacent communications channels)
SS0652
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