1-11. The two basic types of jamming transmitters are the barrage jammer and the spot jammer.
Barrage jammers transmit signals over a wide band of frequencies to interfere with as many
channels as possible, and spot jammers transmit signals by a single jammer on a single
frequency.
If a selected frequency is being jammed, a ___________________
___________________ is probably being used, but if a band of frequencies is being jammed, a
___________________ ___________________ is probably being used.
(1-11. Answer: spot jammer, barrage jammer)
1-12. Using a barrage jammer ensures that all channels within its bandwidth and transmission
are subjected to interference. Since barrage jammer's transmitters are putting out a signal over a
wide band of frequency, power is being wasted on frequencies that have no operating stations.
On these frequencies where no stations are operating, _______________ is wasted. When
signals are put out over wide bandwidths, _______________ jammers are being used.
(1-12. Answer: power, barrage)
1-13. Besides wasting power, the barrage jammer can also jam both friendly and enemy
communications operating in the same frequency band. A disadvantage of the barrage jammer,
then, can be that it jams both _______________ and enemy communications.
(1-13. Answer: friendly)
1-14. Spot jamming is very accurate and effective for controlling jamming of selected
frequencies. Since the spot jammer can concentrate all of its power on the selected frequencies,
it makes much better use of the power output.
As long as there are selected frequencies to jam, the most accurate and effective means of
controlling jamming would be by the _______________ jammer.
(1-14. Answer: spot)
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