Icom IC-756 Marine Radio User Manual


 
37
4
RECEIVE AND TRANSMIT
This function allows you to display the relative
strengths of signals around the center frequency. The
span can be set to ±12.5 kHz, ±25 kHz, ±50 kHz and
±100 kHz. Ideal for monitoring band conditions in an
instant.
q If the start up screen is not selected (if [F-5]s func-
tion is [EXIT]), push [F-5] one or more times to exit.
w Push [(F-1)SCOPE] to select the scope screen.
e Push [(F-1)SPAN] one or more times to select the
scope span.
r Push [(F-2)MARKER] to select the marker or turn
the marker OFF.
- SUB MARK displays the marker at the sub readout fre-
quency.
- TX MARK displays the marker at the transmit fre-
quency.
t Push [(F-3)MAX-H] to hold peak levels or not.
y Push [(F-4)HOLD] to freeze the current spectrum
waveform.
u Push [(F-5)EXIT] to exit the scope screen.
Spectrum scope screen
Grid
5k
10dB
-25kSPECTRUMSCOPE+25k
1ß
14.195.00
VFOVFO
USBUSB
USBUSB
14.100.0014.100.00
1ß
14.100.0014.100.00
14.205.0014.205.00
USBUSB
USBUSB
TX
ANTANT
1
METERMETER
PoPo
P.AMPP.AMP
OFFOFF
ATTATT
OFFOFF
2.4k2.4k9 2.8k2.8k455455
12:3412:34
VFOVFO
MARKERMARKER HOLDHOLDMAX-HMAX-H EXITEXIT
AGCAGC
MIDMID
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
SPANSPAN
1ß
14.195.0014.195.00
VFOVFO
USBUSB
USBUSB
14.100.0014.100.00
1ß
14.100.0014.100.00
14.207.00
USBUSB
USBUSB
ANTANT
1
METERMETER
PoPo
P.AMPP.AMP
OFFOFF
ATTATT
OFFOFF
2.4k2.4k9 2.8k2.8k455455
12:3412:34
VFOVFO
MARKERMARKER HOLDHOLDMAX-HMAX-H EXITEXIT
AGCAGC
MIDMID
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
SPANSPAN
Grid
5k
10dB
Å
Ç
-25kSPECTRUMSCOPE+25k
SPLITSPLIT
TX
SUB
MARK
Appears when the
marker is out of range.
Sub readout
or TX marker
Appears when the
marker is out of range.
The transceiver covers 0.160 MHz over 10 bands.
Each band key has a band memory which can mem-
orize a selected antenna (ANT1, ANT2, ANT1/
RX antenna and ANT2/RX antenna). When you
change the operating frequency beyond a band, the
previously used antenna is automatically selected for
the new band. This function is convenient when you
use 2 or 3 antennas.
To use the band memory, enter set mode and conrm
that AUTO is selected as the [ANT] switch item. (p.
58)
When OFF is selected, the [ANT] switch does not function and
[ANT1] is always selected.
When MANUAL is selected, the [ANT] switch functions, however,
band memory does not function. In this case, you must select an
antenna manually.
When AUTO is selected (default setting), the antenna tuner
ON/OFF condition is also memorized in the band memory.
When AUTO or MANUAL is selected, the antenna tuner ON/OFF
condition is consistent with the [ANT] switch.
Antenna switch selection example
Under the following condition, AUTO should be se-
lected as the [ANT] switch set mode item.
- When you use 2 antennas.
Under the following conditions, MANUAL should be
selected as the [ANT] switch set mode item.
- When using 1 antenna.
- When using the EX-627 HF AUTOMATIC ANTENNA SE-
LECTOR for more than 3 antennas (except for receive
antenna).
- When using an external antenna tuner.
Band memory
(for automatic antenna selection)
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
AGCAGC
MIDMID
EXITEXIT≥≥ DEFDEF≤≤
Quicksplit ON
FMsplitoffset(HF) -0.100MHz
FMsplitoffset(50M) -1.000MHz
FMsubaudible tone 88.5Hz
Split lock OFF
Tuner(autostart) OFF
Tuner(PTTstart) OFF
[ANT]switch AUTO
RTTYmark freq. 2125
[OTHERS[OTHERSSET]SET]