Receiving And Transmitting ����������������� - Icom IC-9700 Basic Manual

Preamplifiers
The preamp amplifies received signals in the receiver front
end to improve the signal-to-noise ratio and sensitivity. A
preamp is used when receiving weak signals.
L Each band memorizes the Preamplifier setting.
Push (P.AMP).
P.AMP
ATT
L Each push turns the preamplifier ON or OFF.
Displayed when the preamp is used.
NOTE: When you use the preamp while receiving
strong signals, the receiving signal may be distorted.
In such case, turn OFF the preamp.
Using an external preamp
You can also use an external preamp (User supplied)
L To use an external preamp, you need to set the External
Preamplifier ON or OFF for each band on the MENU
screen.
» SET > Connectors > External P�AMP
MENU
1. Push .
FUNCTION
2. Touch [w] to change the screen.
3. Touch [EXT P.AMP].
• Each push turns the external preamp ON or OFF.
Attenuator
The Attenuator prevents a desired signal from
becoming distorted when a very strong signal is near
the frequency, or when a very strong electric field, such
as from a broadcasting station, is near your location.
LEach band memorizes the Attenuator setting.
Hold down (ATT) for 1 second to turn ON the
P.AMP
ATT
Attenuator.
turns OFF the Attenuator (no icon).
P.AMP
LPushing
ATT
L If a strong signal is received and "OVF" (Overflow)
appears, turn OFF the attenuator, or reduce the RF gain
until "OVF" disappears. (p. 3-10)
Displayed when the Attenuator is ON
RECEIVING AND TRANSMITTING
RIT function
The RIT (Receive Increment Tuning) function compensates
for differences in frequencies of other stations.
The function shifts the receive frequency up to
±9.99 kHz without shifting the transmit frequency.
1. Push
2. Set the RIT frequency to match the received
3. After communicating, push
D RIT monitor function
When the RIT function is ON, you can directly monitor
the operating frequency by holding down
L While monitoring, the RIT function is temporarily OFF.
L While monitoring, the settings for the Noise Reduction,
D CW Auto Tuning function
CW mode
You can tune in a CW signal you are receiving using
the Auto Tuning function. You can automatically tune
by pushing
CW mode.
L During the Dual Watch mode, this function works on the
L While using RIT, the RIT frequency is automatically tuned
NOTE: When receiving a weak signal, or receiving a signal
with interference, the Auto Tuning function may tune the
receiver to an undesired signal, or may not start to tune. In
such case, a warning beep sounds.
L The Auto Tuning function tunes the frequency in the IF
4-1
.
RIT
• The RIT function turns ON.
L While using the Fine Tuning function (p. 3-4), the RIT
frequency is displayed in 4 digits, instead of 3.
again turns OFF the RIT function.
RIT
LPushing
station's frequency.
L You can reset the RIT frequency to "0.00" by holding
down for 1 second.
MULTI
L You can add the frequency shift to the operating
frequency by holding down
function OFF.
Notch filter and Twin PBT are temporarily OFF.
. This function is active in only the
AUTO
TUNE
selected operational band (Main/Sub).
by this function.
bandwidth.
4
RIT frequency
(3 digits)
Set the RIT
frequency.
Rotate
for 1 second
RIT .
to turn the RIT
RIT
.
XFC
Displayed
while tuning
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