Icom IC-78 Instruction Manual - Page 5

Noise Blanker Switch [nb] - manual

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2 PANEL DESCRIPTION !3 ATTENUATOR SWITCH [ATT] (p. 19) Push to turn the 20 dB attenuator function ON and OFF. @0 CALL SWITCH [CALL] ¯ Push to select call channel. • Push again to return to previous condition. !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 tuning 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. @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. " " appears on the display. !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 distress alarm transmission. ¯ Selects the tuning step item in the quick set mode directly. ¯ No function is assigned. 3

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3
2
PANEL DESCRIPTION
!
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. “
” appears on the
display.