Bedienungsanleitung Icom IC-7400 (Seite 59 von 116) (Englisch)

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FUNCTIONS FOR RECEIVE

2001 NEW

■ Simple band scope

The band scope function allows you to visually check

signal conditions around a speciﬁed frequency. The IC-

7400’s band scope function can be used in any oper-

ating mode and frequency band.

The band scope measures receive signal conditions

over a speciﬁed range on either side of a selected fre-

quency in either VFO or memory modes.

q Rotate the tuning dial to tune a frequency.

w While M1 is selected, push [F5 SCP] to select the

band scope menu.

•Starts sweeping automatically with the previously se-

lected sweeping step.

• During sweep, received signals cannot be heard.

e Push [F5 STEP] several times to select the desired

sweep step.

r Push [F1] to start sweeping, then stop automatically

after sweeping.

•Push [F1] for 1 sec. to start continuous sweeping. In this

case, it is necessary to push [F1] to stop sweeping.

•During sweep operation “” appears and received

signals cannot be heard.

•If there is a lot of signal noise, turn the preamp OFF and

the attenuator ON to reduce the signal input level and

improve the readability of the band scope.

t When rotating the tuning dial and you ﬁnding a sig-

nal you wish to communicate on, then just commu-

nicate in the normal way.

•If you want to return to the previous frequency (before

rotating the tuning dial), push [F3] for 1 sec.

•If the selected frequency is set outside of the sweeped

range, ﬂashes.

y While receiving, if you want to update the band con-

ditions, repeat steps e and r as above.

“ ” or “ ”

0.5k

STEP

Sweep indicator

Band scope indicator

Frequency indicator mark

Sweep step indicator

INDICATOR

Sweep

Band scope in-

dicator

Frequency

indicator mark

Sweep step

DESCRIPTION

While the band scope is “sweeping,” “” appears; while stopped “” appears. Received

audio is not emitted from the speaker while the band scope is “sweeping.”

Indicates the relative strength of signals and their location in relation to the center (displayed)

frequency. Signal strength is relative to the S-meter level, S1 to S9, with each vertical dot in the

band scope indicator equal to one segment of the S-meter. Signal activity is measured ±30

steps from the center frequency with each step equal to the selected sweep step.

After a sweep, indicates the relative position of the selected frequency. When the selected fre-

quency is outside of the sweep range, indicator flashes. After changing the fre-

quency, push [F3] for 1 sec. to automatically return to the center frequency.

Indicates the selected sweep step. 0.5, 1, 2, 5, 10, 20 and 25 kHz are selectable. Each dot of

the band scope indication is approx. equal to the selected sweep step.

“ ” or “ ”

F 1

F 2 F 3 F 4 F 5

F 1

F 2 F 3 F 4 F 5

Sweep step selectionSweep start/stop

O.5k

STEP

O.5k

STEP

Sweep indicator

IC-7400.qxd 02.4.2 11:35 Page 46

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