Icom COMMUNICATIONS RECEIVER IC-R3 - Manual (Page 41)

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12
DIRECTION FINDING
The direction finding function allows you to check a variation
of the signal level continuously.
Using a commercially available directional antenna, you can
determine the direction of the signal source. Using 2 receivers
with the directional antennas, you can pinpoint the signal
source.
q Push [FUNC] + [ ↕ ] for 2 sec. to turn the color LCD ON.
w Push [FUNC] + [ ↕ ] one or more times to select the direction
finding screen.
e Set the desired frequency.
• The color LCD shows the variation of the signal level.
• If the strong signal is received on 1149.995 MHz or below, use
the attenuator function. (p. 9)
r Turn around the directional antenna for maximum receive
level.
t The direction (or opposite) of the maximum receive level
may indicate the signal source direction.
• Direction finding function example
The direction finding function is a supplemental aid for find-
ing a signal source only. It is not designed for use as a
compass.
FM
146.100.000
15.0 TS
Signal source
IC-R3
Signal
levels
Time
FM
146.100.000
15.0 TS
Signal levels