Icom IC-707 Instruction Manual page 21

RIT function
The RIT function shifts the receive frequency to
compensate for an off frequency or frequency drift.
The RIT function does not affect the transmit fre-
quency.
Push the [RIT] switch to activate the RIT function.
e "RIT" appears.
Preamp
The preamp is useful under the following conditions:
— When a receive signal is weak.
— When poor propagation conditions exist.
Push the [PREAMP/ATT] switch 1 time to activate
the preamp.
e If "ATT" appears, push 2 times.
e "PREAMP" appears.
Attenuator
The attenuator is useful to prevent the receive signal
from distorting under the following conditions:
— When strong signals are near the desired fre-
quency.
— When strong signal stations are near your loca-
tion.
Noise blanker
The noise blanker reduces click noise generated by
vehicle ignition systems, etc.
Push the [NB] switch to cancel the noise blanker.
e "NB" appears.
Squelch function
For quiet standby, the squelch mutes noise when no
signal is received. Though squelch operates in all
modes, it is particularly useful for FM mode.
Rotate the [SQL] control to the 12 o'clock position to
mute noise, if required.
e When the [SQL] control is rotated too far clockwise,
weak signals cannot be received.
OPERATION 3
Rotate the [RIT] control.
+0 kHz
Decreases [ © Increases
— 1.2 kHz +1.2 kHz
Push the [RIT] switch again to cancel the RIT func-
tion.
e "RIT" disappears.
Push the [PREAMP/ATT] switch 2 times to cancel
the preamp.
e "PREAMP" disappears.
GY NOTE: When a receive signal is not weak, cancel
the preamp. Otherwise, a suddenly appearing
Push the [PREAMP/ATT] switch 2 times to activate
the attenuator.
e If "PREAMP" appears, push 1 time.
e "ATT" appears.
Push the [PREAMP/ATT] switch 1 time to cancel the
attenuator.
e "ATT" disappears.
Push the [NB] switch again to cancel the noise
blanker .
e "NB" disappears.
Y NOTE: To prevent the receive signal from dis-
torting, cancel the noise blanker when click noise
, is not received.
When the squelch is not required, rotate the [SQL]
control to the max. counterclockwise position.
Recommended position
O [SQL]
) Deep
Squelch open
position