Receiving And Transmitting; Preamplifiers; Attenuator; Rit Function - Icom IC-7610 Basic Manual

Preamplifiers

The preamps amplify received signals in the receiver
front end to improve the signal-to-noise ratio and
sensitivity. A preamp is used when the received
signals are weak.
L E achbandmemorizesthepreviouslyusedPreamplifier
setting.
Touch [P.AMP].
L Each touch sequentially selects "P.AMP 1," "P.AMP 2,"
and "P.AMP OFF."
Widedynamicrangepreamplifier.
P.AMP 1 It is most effective for the HF low bands.
• Gain is approximately 12 dB.
High-gainpreamplifier.
P.AMP 2 It is most effective for the higher bands.
• Gain is approximately 20 dB.
NOTE:
• When you use the preamp while receiving strong
signals, the receiving signal may be distorted. In such
case, turn OFF the preamp.
•  W hiletheDigitalSelectorisON,"P.AMPOFF"isfixed,
and you cannot select "P.AMP 1" or "P.AMP 2."

Attenuator

The Attenuator prevents a signal from becoming
distorted when a very strong signal is being received
near your operating frequency, or when a very strong
electricfield,suchasfromabroadcastingstation.
Touch [ATT] to sequentially set the Attenuator up to 18
dB in 6 dB steps.
You can also set the Attenuator in 3 dB steps:
1. Touch [ATT] for 1 second to open the ATT menu.
2. Rotate to adjust the attenuator level of
MULTI
up to 45 dB.

RECEIVING AND TRANSMITTING

RIT function

The RIT (Receive Increment Tuning) function
compensates for differences in the transmit
frequencies of other stations.
ThefunctionshiftsyourMainbandʼsreceivefrequency
up to ±9.99 kHz without shifting your transmit
frequency.
1. Push
2. Rotate
3. When you have finished communicating, push

D Using the RIT Monitor function

When the RIT function is ON, you can monitor your
operating frequency while holding down
L While monitoring:
Displayed
4-1
to
turn ON the RIT function.
RIT
L While using the Fine Tuning function (p. 3-4), the RIT
frequency is displayed in 4 digits, instead of 3.
RIT frequency
to set the RIT frequency to match
RIT/ TX
the transmitting station's frequency.
L You can reset the RIT frequency to "0.00" by holding
down for 1 second.
CLEAR
L You can add the frequency shift to your operating
frequency by holding down
to turn the RIT function OFF.
RIT
• The RIT function is temporarily OFF.
•  T heNoiseReduction,NotchfilterandTwinPBT
settings are temporarily OFF.
4
for 1 second
.
RIT
RIT
.
XFC
XFC
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