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Page Title:
JAMMING/ANTI-JAMMING PROCEDURES; FH MODE OF OPERATIONS |
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|  TM 11-5820-890-10-8
Jamming/anti-jamming procedures for FH operations are shown in
FH OPERATIONS
the chart below.
JAMMING/ANTI-JAMMING PROCEDURES; FH MODE OF OPERATIONS
ACTIONS
POSSIBILITIES
SYMPTOM
If feasible, try to place an obstacle
You are being jammed if
You hear loud noise or strong static
between you and the enemy.
disconnecting the antenna
making net traffic difficult to
Advise NCS of your problem.
causes the SIG display to drop
impossible to hear. Your SIG
to LO and noise level is
display remains on or goes on and
reduced.
off at regular intervals. Signal
strength is greater than LO.
Try to get interfering system shut
You may be experiencing
down momentarily to determine if
interference from a friendly
it is the source of your problem. If
communication system (called
it is, change your location, remote
a co-site problem).
your antenna or RT or try to place
an obstacle between you and the
interfering station.
Press your PTT two times. Net
There is a captured RT in your
You hear a constant hiss or
should clear. Advise NCS of your
net, constantly transmitting to
background noise in the handset
action.
act as a jammer.
but no loud noise or net traffic.
Press your PTT two times. Net
There is a stuck mike or bad
should clear. Advise NCS of your
handset in you net that is
action.
locked in the PTT position.
Free up PTT or replace handset
Your own handset is stuck if
with a known good one.
you hear sidetone without
pressing PTT SIG display
drops to LO or below when
handset is disconnected.
Identify interfering radio and
You are probably experiencing
You hear background popping or
co-site interference from a
request operator to reduce RF
static when receiving, and your
PWR setting, move your radio at
friendly radio.
operating range is reduced. Your
least 50 meters, or remote your
SIG display is flickering.
RT or antenna. Advise NCS of
your action.
5-70
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