Icom IC-756 Instruction Manual page 61

E Miscellaneous (others) set mode (continued)
Tuning of the internal antenna tuner can be started
automatically at the moment the PTT is pushed after
the operating frequency is changed (more than 1%
from last-tuned frequency).
CART] switech
You can set the antenna connector selection to auto-
matic, manual or non-selection (when using 1 an-
tenna only).
When "AUTO?" is selected, the antenna switch is acti-
vated and the band memory memorizes the selected
antenna. See p. 37 for details.
When "MANUAL" is selected, the antenna switch is
activated and selects an antenna manually.
When "OFF" is selected, the antenna switch is not ac-
tivated and does not function. The [ANT1] connector
is always selected in this case.
RTTY mark fred
This item selects the RTTY mark frequency. RTTY
mark frequency is toggled between 1275, 1615 and
2125 Hz.
yo ahith width
This item adjusts the RTTY shift width. There are 3
selectable values: 170, 200 and 425 Hz.
PETTY kesina Polarity
This item selects the RTTY keying polarity. Normal or
reverse keying polarity can be selected.
When reverse polarity is selected, Mark and Space
are reversed.
- Normal : Key open/close = Mark/Space
- Reverse : Key open/close = Space/Mark
ON
Automatic PTT start
ON
ges
SET MODE
OFF
Automatic PTT start
OFF (default)
Antenna switch is activated and the
selection is automatically memorized.
(default)
MANUAL Antenna switch is activated.
OFF Antenna switch is deactivated and
[ANT1] is always selected.
2125
2125 Hz RTTY mark
frequency (default)
176
170 Hz RTTY shift
frequency (default)
NORMAL
Normal polarity (default)
1275
1275 Hz RTTY mark
frequency
425
425 Hz RTTY shift
frequency
REVERSE
Reverse polarity
8
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