Icom IC-78 Instruction Manual page 5

!3 ATTENUATOR SWITCH [ATT] (p. 19)
Push to turn the 20 dB attenuator function ON and
OFF.
!4 TUNER SWITCH [TUNER] (p. 18)
Push to turn the antenna tuner function ON and
OFF.
Push for 1 sec. to manually tune the tuner.
• An optional antenna tuner must be connected.
• When the tuner cannot tune the antenna, the tun-
ing circuit is bypassed automatically after 20 sec.
!5 SET SWITCH [SET]
Push for 1 sec. to enter the quick set mode .
(p. 28)
Push and hold [SET], then push [PWR] to enter
the initial set mode . (p. 28)
Push to change the meter function; (p. 16)
• PO: indicates the relative RF output power.
• ALC: Indicates ALC level.
• SWR: Indicates the SWR over the transmission
line.
!6 MIC COMPRESSOR SWITCH [COMP] (p. 17)
Turn the Mic. compressor function ON and OFF.
!7 KEYPAD
The keypad can be used for several functions as
described below:
[0] to [9]
— For entering operating channel number. (p. 13)
— Selects a character during channel comment
programming. (p. 27)
[ENT]
— Direct channel number input. (p. 13)
[TXF]
— Transmit frequency indication. (p.14)
— Selects a space and changes the editing digit
during channel comment programming. (p. 27)
!8 NOISE BLANKER SWITCH [NB] (p. 19)
Turns the noise blanker ON and OFF. The noise
blanker reduces pulse-type noise such as that
generated by automobile ignition systems. This
function is not effective against non pulse-type
noise.
Push [NB] for 1 sec. to enter the noise blanker
level setting condition.
!9 TONE SWITCH [TONE]
This key action may differ according to version.
Selects the call channel and emits a distress
alarm tone from the speaker. (p. 36)
Transmits a distress alarm or alarm testing signal
when pushed for 1 sec. (p. 36)
• Cancel the distress alarm tone emission, or dis-
tress alarm transmission.
Selects the tuning step item in the quick set mode
directly.
No function is assigned.
@0 CALL SWITCH [CALL]
Push to select call channel.
• Push again to return to previous condition.
@1 MODE SWITCH [MODE] (p. 15)
Push to change an operating mode.
• Push [MODE] for 1 sec. during SSB mode to
switch between LSB or USB.
• Push [MODE] for 1 sec. during CW or RTTY
mode, to switch between CW and CW reverse or
RTTY and RTTY reverse. "
display.
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PANEL DESCRIPTION
" appears on the
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