TM 11-5820-890-10-3
JAMMING AND ANTIJAMMING Continued
SINGLE CHANNEL OPERATION. Continued
SYMPTOM
POSSIBILITIES
ACTION
SIG marker is lit and
You have enemy or
Set RT FCTN to SQ OFF and
showing a signal high-
friendly radio inter-
listen for radio traffic. Try to
er than 3. You hear
ference.
identify a friendly call sign if
random radio traffic or
you can determine friendly
radio signals.
signals. If you determine that
jamming is from an enemy
source, change location and
use terrain to mask your RT
from the enemy jamming
source. Switch to a better
antenna (if using manpack,
switch to vehicular or
OE-254) Contact NCS and
your supervisor.
SIG marker is lit and
(1)
You may have
(1)
Set RT FCTN to SQ OFF.
showing a signal high-
enemy sweep jamm-
You may hear a very high-
er than 3. The signal
ing.
pitched noise or static each
marker may light on
time the SIG marker lights.
and off at regular inter-
Use terrain to mask your RT
vals (pulsing) or in a
from enemy’s suspected lo-
random cycle. You may
cation. Contact NCS and
or may not hear any
your supervisor.
noise.
(2)
You have radio
(2)
Symptoms and actions
or radar interference.
are similar to sweep jamm-
ing (above), except that sig-
nals will be coming from a
friendly source (maybe).
Use terrain to mask your RT
from suspected source lo-
cation. Contact NCS and
your supervisor.
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