JAMMING AND ANTIJAMMING
JAMMING. Jamming is the Intentional transmission of signals
that interrupt your ability to receive needed signals. Interfer-
ence is the accidental transmission of signals that also interrupt
your ability to receive needed signals. lf you are being jammed,
it might sound like strong static, misleading signals, or random
noise: or the net may be quiet with no signals heard. These
signals depend upon the type of jamming signals and whether
your net is operating in single channel (SC) or frequency hop-
ping (FH) mode. The source of jamming could be power gener-
ators, radar sets, high power RF radio sets, or intentional en-
emy jammers.
SINGLE CHANNEL OPERATION.
SIG marker is lit
and showing a sig-
nal higher than 3.
You hear no traffic
or noise and you
are not transmit-
ting .
(1) You have a bad
handset if you dis-
connect the hand-
set and the Iighted
signal goes away
(stuck or “hot”
mike).
(2) You are being
jammed if you set
RT FCTN switch to
SQ OFF and hear
strong static or
random noise. You
can confirm this by
disconnecting the
antenna (MP) or
antenna cable (ve-
hicular). The SIG
marker will drop
and the noise will go
away or be re-
duced.
(1) Try to free-up
the stuck mike by
pressing push-to-
talk 2 or 3 times,
Remove
faulty
handset and re-
place with one that
is good.
(2) Change your
tactical location.
Try to mask your
RT/antenna by
placing hills, rocks,
buildings, etc. be-
tween you and the
enemy. Notify your
supervisor and pre-
pare a MIJI feeder
report.
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