4
RECEIVING AND TRANSMITTING
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4-1
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
ATT
(P.AMP).
L
Each push turns the preamplifier ON or OFF.
NOTE
: When you use the preamp while receiving
strong signals, the receiving signal may be distorted.
In such case, turn OFF the preamp.
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.
L
Each band memorizes the Attenuator setting.
Hold down
P.AMP
ATT
(ATT) for 1 second to turn ON the
Attenuator.
L
Pushing
P.AMP
ATT
turns OFF the Attenuator (no icon).
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)
RIT frequency
(3 digits)
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
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.
L
Pushing
RIT
again turns OFF the RIT function.
L
You can reset the RIT frequency to “0.00” by holding
down
MULTI
for 1 second.
L
You can add the frequency shift to the operating
frequency by holding down
RIT
for 1 second
.
3.
After communicating, push
RIT
to turn the RIT
function OFF.
Set the RIT
frequency.
Rotate
D
RIT monitor function
When the RIT function is ON, you can directly monitor
the operating frequency by holding down
XFC
.
L
While monitoring, the RIT function is temporarily OFF.
L
While monitoring, the settings for the Noise Reduction,
Notch filter and Twin PBT are temporarily OFF.
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.
MENU
» SET > Connectors >
External P�AMP
1. Push
FUNCTION
.
2. Touch [
w
] to change the screen.
3.
Touch [EXT P.AMP].
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
AUTO
TUNE
. This function is active in only the
CW mode.
L
During the Dual Watch mode, this function works on the
selected operational band (Main/Sub).
L
While using RIT, the RIT frequency is automatically tuned
by this function.
Displayed
while tuning
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
bandwidth.
•Each push turns the external preamp ON or OFF.
Displayed when the preamp is used.
Displayed when the Attenuator is ON
2. Set the RIT frequency to match the received
station’s frequency.