ICOM 242700 Manuale Utente

FUNCTIONS FOR RECEIVE

■Preamp and attenuator

The

preamp ampliﬁes received signals in the receiver

input (front end) circuit to improve the S/N ratio and
sensitivity. Turn this function ON when receiving weak
signals.

The

attenuator prevents a strong undesired signal

near the desired frequency or near your location,
such as from a broadcast station, from causing dis-
tortion or spurious signals.

Push

[P.AMP/ATT] momentarily to turn the preamp

ON and OFF; push and hold for 1 sec. to turn the at-
tenuator ON.

• “

” appears when the preamp is ON; “

” ap-

pears when the 12 dB attenuator is ON.

• Only one of these functions can be activated at a time.

momentarily

1 sec.

[P.AMP/ATT]

“ ” or “ ” appears.

Scope set mode (Continued)

1 Max Hold

This item turns the peak level holding function ON
and OFF.

Peak hold is turned ON.
(default)

OFF

Peak hold is turned OFF.

2 Scope Size

This item turns the scope size setting normal and
wide.

Normal

Normal size is selected.
(default)

Wide

Wide size is selected.

3 FAST Sweep

This item selects the sweep speed setting.

Continuous

Push

[F-4 SPD] momentar-

ily to toggle the sweep
speed Fast and Slow contin-
uously. (default)

1 Sweep

Sweep speed changes Slow
to Fast just for one sweep
every pushing

[F-4 SPD]

momentarily.

4 FAST Sweep Sound

This item sets the monitoring sound level for fast
sweeping.

-10dB

Monitoring sound is set 10 dB smaller than
normal sound. (default)

0dB

Same as normal sound.

OFF

No sound comes out while fast sweeping