Icom IC-756 Instruction Manual page 40

37
4 RECEIVE AND TRANSMIT
E Spectrum scope screen
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.
© 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.
(2) Push [(F-1)SCOPE] to select the scope screen.
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@) Push [(F-1)SPAN] one or more times to select the
scope span.
@ 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.
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Appears when the Sub readout
marker is out of range. or TX marker
Appears when the
marker is out of range.
© Push [(F-3)MAX-H] to hold peak levels or not.
© Push [(F-4)HOLD] to freeze the current spectrum
waveform.
@ Push [(F-5)EXIT] to exit the scope screen.
E Band memory (for automatic antenna selection)
The transceiver covers 0.1—60 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 confirm
that "AUTO" is selected as the [ANT] switch item. (p.
58)
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¢When OFF is selected, the [ANT] switch does not function and
[ANT 1] is always selected.
e When MANUAL is selected, the [ANT] switch functions, however,
band memory does not function. In this case, you must select an
antenna manually.
eWhen 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.
e 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.