TM 11-5820-890-10-1
SINGLE CHANNEL OPERATION. Continued
SYMPTOM
POSSIBILITIES
ACTION
SIG marker is lit and
showing a signal high-
er than LO. You hear
random radio traffic or
radio signals.
You have enemy or
Set RT FCTN to SQ OFF and
friendly radio inter-
listen for radio traffic. Try to
ference.
identify a friendly call sign if
you can determine friendly
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
showing a signal high-
er than LO. The signal
marker may light on
and off at regular inter-
vals (pulsing) or in a
random cycle. You may
or may not hear any
noise.
(1) You may have
(1) Set RT FCTN to SQ OFF.
enemy sweep jamm-
You may hear a very high-
ing.
pitched noise or static each
time the SIG marker lights.
Use terrain to mask your RT
from enemy’s suspected lo-
cation. Contact NCS and
your supervisor.
(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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