Icom Ic-78 Hf Tranciever Instruction Manual
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![Page 16
4OPERATION
14
nFrequency indication
By pushing the [FC], channel comment indication or
frequency indication can be selected.
DTransmit frequency indication
By pushing the [TXF], transmit frequency is indicated,
regardless channel comment or frequency indication.
While transmit frequency is indicated, Ò Ó ßashes.
nLock function
The lock function electronically locks the main dial to
prevent accidental channel changing.
Push [LOCK] to turn the lock function ON and OFF.
Before channel selection, turn this...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-15.png "Page 16
4OPERATION
14
nFrequency indication
By pushing the [FC], channel comment indication or
frequency indication can be selected.
DTransmit frequency indication
By pushing the [TXF], transmit frequency is indicated,
regardless channel comment or frequency indication.
While transmit frequency is indicated, Ò Ó ßashes.
nLock function
The lock function electronically locks the main dial to
prevent accidental channel changing.
Push [LOCK] to turn the lock function ON and OFF.
Before channel selection, turn this...")
![Page 17
15
4OPERATION
nMode selection
The [RF/SQL] control adjusts either the RF gain or
the squelch. The action depends on the operating
mode and the condition of the RF/SQL item in
initial
set mode
(p. 31).
¥ [RF/SQL] control priority
* The RF gain is set to maximum level when the [RF/SQL]
is set as [SQL] control.
The RF gainis used to adjust the receiver gain.
¥ Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The recommended position for RF gain is the...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-16.png "Page 17
15
4OPERATION
nMode selection
The [RF/SQL] control adjusts either the RF gain or
the squelch. The action depends on the operating
mode and the condition of the RF/SQL item in
initial
set mode
(p. 31).
¥ [RF/SQL] control priority
* The RF gain is set to maximum level when the [RF/SQL]
is set as [SQL] control.
The RF gainis used to adjust the receiver gain.
¥ Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The recommended position for RF gain is the...")
![Page 18
16
4OPERATION
•Meter function
The bar meter in the function display acts as an S-
meter (for relative signal strength) during receive and
can be selected for one of three functions during
transmit.
¥ Push [SET] to select the PO, ALC and SWR meter
mode.
¥ Measuring SWR
qConÞrm that the output power is over 30 W.
wPush [SET] to select the SWR meter.
ePush [MODE] to select CW or RTTY operation.
¥ Key down or push [PTT] to transmit; then read the ac-
tual SWR from the meter:
²1.5; well matched antenna
³1.5;...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-17.png "Page 18
16
4OPERATION
•Meter function
The bar meter in the function display acts as an S-
meter (for relative signal strength) during receive and
can be selected for one of three functions during
transmit.
¥ Push [SET] to select the PO, ALC and SWR meter
mode.
¥ Measuring SWR
qConÞrm that the output power is over 30 W.
wPush [SET] to select the SWR meter.
ePush [MODE] to select CW or RTTY operation.
¥ Key down or push [PTT] to transmit; then read the ac-
tual SWR from the meter:
²1.5; well matched antenna
³1.5;...")
![Page 19
17
4OPERATION
•Microphone compressor
IC-78 has a built-in, low distortion Mic compressor
circuit. This circuit increases your average talk power
in SSB mode and is especially useful when the re-
ceiving station is having difÞculty copying your signal.
qSelect USB or LSB mode.
wPush [COMP] switch to turn mic compressor ON.
¥ ÒCOMÓ indicator appears.
eConÞrm the ALC level.
¥ Push [SET] to select the ALC meter.
¥ Speak into the microphone at a normal voice level.
¥ If the ALC meter peak past the ALC zone,...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-18.png "Page 19
17
4OPERATION
•Microphone compressor
IC-78 has a built-in, low distortion Mic compressor
circuit. This circuit increases your average talk power
in SSB mode and is especially useful when the re-
ceiving station is having difÞculty copying your signal.
qSelect USB or LSB mode.
wPush [COMP] switch to turn mic compressor ON.
¥ ÒCOMÓ indicator appears.
eConÞrm the ALC level.
¥ Push [SET] to select the ALC meter.
¥ Speak into the microphone at a normal voice level.
¥ If the ALC meter peak past the ALC zone,...")
![Page 23
21
4OPERATION
nFilter selection
The Þlter selection switches the IF passband width as
shown in the table at right.
The Þlter selection is for temporal setting.
qSelect the desired mode programmed channel.
(p. 13)
wPush [SET] for 1 sec. to enter
quick set mode.
ePush [UPY] or [ZDN] several times until ÒFILTERÓ
appears on the display.
rRotate the channel selector to select desired pass-
band width.
¥ Either Ò Ó or Ò Ó does not appear while the nor-
mal Þlter is selected.
¥ Ò Ó appears when the wide Þlter...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-22.png "Page 23
21
4OPERATION
nFilter selection
The Þlter selection switches the IF passband width as
shown in the table at right.
The Þlter selection is for temporal setting.
qSelect the desired mode programmed channel.
(p. 13)
wPush [SET] for 1 sec. to enter
quick set mode.
ePush [UPY] or [ZDN] several times until ÒFILTERÓ
appears on the display.
rRotate the channel selector to select desired pass-
band width.
¥ Either Ò Ó or Ò Ó does not appear while the nor-
mal Þlter is selected.
¥ Ò Ó appears when the wide Þlter...")
![Page 24
22
4OPERATION
When an optional Þlter is installed, set the optional Þl-
ters in
initial set mode. Optional filters are not se-
lected by default. (p. 33)
DOptional Þlter setting
qWhile pushing and holding [SET], push [PWR] to
enter
initial set mode.
wPush [UPY] or [ZDN] several times until ÒFILÓ ap-
pears on the display.
eRotate the channel selector to select the installed
Þlter.
¥ Òno,Ó Ò52A,Ó Ò53A,Ó Ò96,Ó Ò222Ó and Ò257Ó indicate no op-
tional filter, FL-52A, FL-53A, FL-96, FL-222 and
FL-257,...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-23.png "Page 24
22
4OPERATION
When an optional Þlter is installed, set the optional Þl-
ters in
initial set mode. Optional filters are not se-
lected by default. (p. 33)
DOptional Þlter setting
qWhile pushing and holding [SET], push [PWR] to
enter
initial set mode.
wPush [UPY] or [ZDN] several times until ÒFILÓ ap-
pears on the display.
eRotate the channel selector to select the installed
Þlter.
¥ Òno,Ó Ò52A,Ó Ò53A,Ó Ò96,Ó Ò222Ó and Ò257Ó indicate no op-
tional filter, FL-52A, FL-53A, FL-96, FL-222 and
FL-257,...")
![Page 25
23
4OPERATION
nFunction for CW
•Connection for CW
12348 7 6 5 910 11 1213
Paddle [ELEC KEY]
[MICROPHONE]
See p. 25 for connection details:
Paddle operation from front panel
MIC connector.
Straight key
Microphone
Initial set mode setting (p. 32)
48
12
[ACC]
1237 6 5 9
10 1113
For no break-in operation:
Connect an external switch such as
a foot switch; or use the RTTY
SEND terminal for all bands.
(See p. 25)
: normal
: reverse
: off
: UP/DN key
•CW operation
qConnect a paddle or straight key as...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-24.png "Page 25
23
4OPERATION
nFunction for CW
•Connection for CW
12348 7 6 5 910 11 1213
Paddle [ELEC KEY]
[MICROPHONE]
See p. 25 for connection details:
Paddle operation from front panel
MIC connector.
Straight key
Microphone
Initial set mode setting (p. 32)
48
12
[ACC]
1237 6 5 9
10 1113
For no break-in operation:
Connect an external switch such as
a foot switch; or use the RTTY
SEND terminal for all bands.
(See p. 25)
: normal
: reverse
: off
: UP/DN key
•CW operation
qConnect a paddle or straight key as...")
![Page 26
4OPERATION
24
•CW pitch control
The received CW audio pitch and monitored CW
audio pitch can be adjusted to suit your preferences
(300 to 900 Hz) without changing the operating fre-
quency.
qPush [SET] for 1 sec. to enter quick set mode.
wPush [ºUP]/[ÃDN] one or more times until ÒCW
PITCHÓ appears, then rotate the main dial to set
the desired pitch. (p. 29)
•CW reverse mode
The CW-R (CW Reverse) mode receives CW signals
with a reverse side CW carrier point like that of LSB
and USB modes. Use this mode...](http://img.usermanuals.tech/thumb/2452/82256/w64_icom_ic78-hf-tranciever_manual_d-25.png "Page 26
4OPERATION
24
•CW pitch control
The received CW audio pitch and monitored CW
audio pitch can be adjusted to suit your preferences
(300 to 900 Hz) without changing the operating fre-
quency.
qPush [SET] for 1 sec. to enter quick set mode.
wPush [ºUP]/[ÃDN] one or more times until ÒCW
PITCHÓ appears, then rotate the main dial to set
the desired pitch. (p. 29)
•CW reverse mode
The CW-R (CW Reverse) mode receives CW signals
with a reverse side CW carrier point like that of LSB
and USB modes. Use this mode...")
4OPERATION 19 nFunctions for receive •RIT function The RIT (Receive Incremental Tuning) function com- pensates for off-frequencies of communicating sta- tions. The function shifts the receive frequency up to 1.2 KHz without moving the transmit frequency. qRotate the RIT control to cancel the off-frequen- cies. ¥ Ò Ó appears on the display. ¥ The transmit frequencies are not shifted. wTo cancel the RIT function, rotate the RIT control to the center position. ¥ Ò Ó disappears. •Preamp The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn this function ON when receiving weak signals. åPush [P.AMP] to turn the the preamp ON and OFF. ¥ Preamp functions below 1.6 MHz, but sensitivity may be reduced in some cases.Appears when the preamp is ON. •Attenuator The attenuator prevents desired signals from distort- ing when very strong signals are near the desired fre- quency or when very strong electric fields, such as from broadcasting stations, are near your location. åPush [ATT] to turn the 20 dB attenuator function ON and OFF. ¥ ÒATTÓ appears when the attenuator is turned ON. Appears when the attenuator is ON. RIT off position •Noise blanker The noise blankerreduces pulse-type noise such as that generated by automobile ignition systems. qPush the [NB] switch to turn the noise blanker ON. ¥ [NB] indicator appears. wPush the [NB] for 1 sec. to enter the noise blanker level setting condition. eRotate the channel selector to adjust the noise blanker level. rPush [NB] to exit the setting condition. tPush [NB] again to turn the noise blanker function OFF. ¥ [NB] indicator disappears. ¥ When using the noise blanker, received signals may be distorted if they are excessively strong. ¥ The noise blanker function in AM mode can be deactivated depending on initial set modesetting. (p. 31) [NB] switch Appears when the noise blanker is ON.
20 •Meter peak hold The meter peak hold function freezes the highest dis- played bar segment in any meter function for about 0.5 sec. so that you can more easily read the meter. This function can be turned ON and OFF in initial set mode . (p. 31) Initial reception of a signal results in an S-meter reading of 40 dB. The highest indicated bar remains displayed for 0.5 sec. even when the signal strength decreases. The IF shift function electronically narrows the pass- band frequency of the IF (intermediate frequency) and cuts out higher or lower frequency components of the IF to reject interference. The function shifts the IF frequency up to ±1.2 KHz in SSB/CW/RTTY modes and up ±250 Hz in CW-narrow/RTTY narrow modes. The IF shift is not available in AM mode.IF SHIFT OPERATION EXAMPLE ¥ Adjust the [SHIFT] control for a minimum interfer- ence signal level. ¥ When IF shift is used, the audio tone may be changed. ¥ Set the IF shift control to its center position when there is no interference. SHIFTSHIFTSHIFT IF center frequency Interference Desired signalPassband Both controls at center positionCutting a lower passbandCutting higher passbands Interference Desired si gnalPassband •IF shift function 4OPERATION
21
4OPERATION
nFilter selection
The Þlter selection switches the IF passband width as
shown in the table at right.
The Þlter selection is for temporal setting.
qSelect the desired mode programmed channel.
(p. 13)
wPush [SET] for 1 sec. to enter
quick set mode.
ePush [UPY] or [ZDN] several times until ÒFILTERÓ
appears on the display.
rRotate the channel selector to select desired pass-
band width.
¥ Either Ò Ó or Ò Ó does not appear while the nor-
mal Þlter is selected.
¥ Ò Ó appears when the wide Þlter is selected.
¥ Ò Ó appears when the narrow Þlter is selected.
tPush [SET] to exit quick set mode.¥ Optional Þlter variations
When an optional Þlter is installed, set the optional
Þlter in
initial set mode. An optional Þlter is not se-
lected by default.
FL-65 (2.4 kHz)*1
FL-257 (3.3 kHz)*2
FL-96 (2.8 kHz)*2
FL-222 (1.8 kHz)*2
FL-52A (500 Hz)*2
FL-53A (250 Hz)*2
2nd IF signal
2nd IF signal/DETCFWS450HT (6 kHz)*3
Through
*
1 AM; Narrow,
SSB/CW/RTTY; Normal
*
3 AM; Normal,
SSB/CW/RTTY; Wide *
2 OPTION
Name Band width Mode
FL-52A 500 Hz/Ð6dB CW/RTTY-N
FL-53A 250 Hz/Ð6dB CW/RTTY-N
FL-96 2.8 KHz/Ð6dB SSB-W
FL-222 1.8 KHz/Ð6dB SSB-N
FL-257 3.3 KHz/Ð6dB SSB-W
¥ Filter construction (Rx)
¥ Filter selection table
no FL-52A FL-53A FL-96 FL-222 FL-257
WIDE 6 kHz* 6 kHz* 6 kHz*6 kHz*
6 kHz*6 kHz*
SSB2.8 kHz 3.3 kHz
NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
NARROW Ñ 500 Hz* 250 Hz* Ñ 1.8 kHz* Ñ
WIDE 6 kHz* 6 kHz* 6 kHz*6 kHz*
6 kHz*6 kHz*
CW2.8 kHz 3.3 kHz
NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
NARROW Ñ 500 Hz 250 Hz Ñ 1.8 kHz Ñ
WIDE 6 kHz* 6 kHz* 6 kHz*6 kHz*
6 kHz*6 kHz*
RTTY2.8 kHz 3.3 kHz
NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
NARROW Ñ 500 Hz 250 Hz Ñ 1.8 kHz Ñ
WIDE Ñ Ñ Ñ Ñ Ñ Ñ
AMNORMAL 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz
NARROW 2.4 kHz2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
500 Hz* 250 Hz* 2.8 kHz* 1.8 kHz* 3.3 kHz*
*Can be used when the expanded Þlter selection is turned on in the initial set mode. (see next page)
22 4OPERATION When an optional Þlter is installed, set the optional Þl- ters in initial set mode. Optional filters are not se- lected by default. (p. 33) DOptional Þlter setting qWhile pushing and holding [SET], push [PWR] to enter initial set mode. wPush [UPY] or [ZDN] several times until ÒFILÓ ap- pears on the display. eRotate the channel selector to select the installed Þlter. ¥ Òno,Ó Ò52A,Ó Ò53A,Ó Ò96,Ó Ò222Ó and Ò257Ó indicate no op- tional filter, FL-52A, FL-53A, FL-96, FL-222 and FL-257, respectively for 455 kHz IF Þlter selection. rPush [PWR] for 1 sec. to exit initial set mode. DExpanded Þlter selection The selectable Þlter combinations can be expanded by setting the expanded Þlter selection to ON. Then extra wide or narrow Þlter can be selected on desired mode. qWhile pushing and holding [SET], push [PWR] to enter initial set mode. wPush [UPY] or [ZDN] several times until ÒEXP FILÓ appears. eRotate the channel selector to turn the expanded Þlter selection ÔonÕ. ¥ If ÔonÕ is selected, the expanded Þlter selection can be used. ¥Wide/narrow Þlter selection rPush [UPY] several times until ÒWIDE [[Ó or ÒNAR [[Ó appears on the display. tPush [MODE] several times to se- lect the desired mode. yRotate the channel selector to se- lect a Þlter. uRepeat steps tand yto select IF filters for other modes, if de- sired. ¥ The filter combinations are stored depending on operating modes. iPush [PWR] for 1 sec. to exit ini- tial set mode . nFilter setting ¥Narrow Þlter setting table ¥Wide Þlter setting table no FL-52A FL-53A FL-96 FL-222 FL-257 SSBno no no 96 (2.8 kHz)no257 (3.3 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) CWno no no96 (2.8 kHz)no257 (3.3 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) RTTYno no no96 (2.8 kHz)no257 (3.3 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) AMÑÑÑÑÑÑ : default no FL-52A FL-53A FL-96 FL-222 FL-257 SSBÑnono Ñ 222 (1.8 kHz)Ñ 52A (500 Hz) 53A (250 Hz) CWÑ52A (500 Hz) 53A (250 Hz) Ñ 222 (1.8 kHz)Ñ RTTYÑ52A (500 Hz) 53A (250 Hz) Ñ 222 (1.8 kHz)Ñ AMNOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) 52A (500 Hz) 53A (250 Hz) 96 (2.8 kHz) 222 (1.8 kHz)257 (3.3 kHz) : default
23 4OPERATION nFunction for CW •Connection for CW 12348 7 6 5 910 11 1213 Paddle [ELEC KEY] [MICROPHONE] See p. 25 for connection details: Paddle operation from front panel MIC connector. Straight key Microphone Initial set mode setting (p. 32) 48 12 [ACC] 1237 6 5 9 10 1113 For no break-in operation: Connect an external switch such as a foot switch; or use the RTTY SEND terminal for all bands. (See p. 25) : normal : reverse : off : UP/DN key •CW operation qConnect a paddle or straight key as above. wSelect CW (or CW-REV) programmed channel. eSet CW break-in operation as semi break-in, full break-in or OFF. (see p. 30) ¥ Push [SET] for 1 sec. to enter quick set mode. ¥ Push [UPY] or [ZDN] several times until ÒBK-INÓ ap- pears, then rotate the channel selector to select the desired condition: FL: full break-in SE: semi break-in oF: no break-in rSet the CW delay time when semi break-in opera- tion is selected. (see p. 30) ¥ Push [SET] for 1 sec. to enter quick set mode; push [UPY] or [ZDN] several times until ÒBK-DELAYÓ ap- pears, then rotate the channel selector to select the de- sired delay time. CW mode and semi break-in operation is selected. Delay time of 6 dots is selected in quick set mode for semi break-in operation.
4OPERATION 24 •CW pitch control The received CW audio pitch and monitored CW audio pitch can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating fre- quency. qPush [SET] for 1 sec. to enter quick set mode. wPush [ºUP]/[ÃDN] one or more times until ÒCW PITCHÓ appears, then rotate the main dial to set the desired pitch. (p. 29) •CW reverse mode The CW-R (CW Reverse) mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes. Use this mode when interference signals are near the desired signal and you want to change the interference tone. qPush [MODE] one or more times to select CW mode. wPush [MODE] for 1 sec. to switch between CW and CW-R modes. BFO1/3 octavePush for 1 sec. Desired signal (600 Hz) CW mode (USB side)Interference (800 Hz) BFO 1/2 octave Desired signal (600 Hz) CW REV mode (LSB side)Interference (400 Hz) MODE •Electronic CW keyer The IC-78 has an electronic keyer. Both keying speed and weight (the ratio of dot : space : dash) can be set in quick set mode. ¥ Setting the electronic keyer qPush [MODE] one or more times to select CW mode. wWhile pushing and holding [SET], push [PWR] to enter initial set mode. ePush [ºUP]/[ÃDN] one or more times until ÒCW PADDLÓ appears, then rotate the main dial to se- lect the paddle type. ¥ When ÒudÓ is selected, the up/down switches on the mi- crophone can be use as a paddle. ¥ When using up/down switches as a paddle, squeeze keying function is not available. rPush [ºUP]/[ÃDN] one or more times until ÒKEY RATÓ appears, then rotate the main dial to select the desired weight. ¥ Key weight can be selected from 2.8 to 4.5. tPush [ºUP]/[ÃDN] one or more times until ÒKEY SPDÓ appears, then rotate the main dial to select the desired weight. ¥ Key weight can be select from 6 to 60. Paddle operation from front panel MIC connector Connect a CW paddle as at right to operate an elec- tronic keyer from the front panel MIC connector. ¥ This function is available from the front panel mic con- nector only. ¥ Be sure to select item Òn,ÓÒr,Óor ÒoFÓ in CW PADDL in initial set mode. ¥ Connect straight key to ÒDOTÓ side. This shows the default setting for the CW pitch control (600 Hz). KEYING WEIGHT EXAMPLE: morse code “K” *SPACE and DOT length can be adjusted with “KEY SPD in the quick set mode only.DASH Weight setting: 1:1:3 (default) Weight setting: AdjustedDASH DOT (Fixed*) Adjustable range SPACE (Fixed*) front panel MIC connector MIC U/D CW paddleDOT E DASHyY 3.9 k½ ±5% 2.2 k½ ±5% eY Paddle operation
4OPERATION
25
nFunction for RTTY
•Connection for RTTY (FSK)
Rear panel
TU or TNC
Personal computer
Rear panel
viewUse either the ACC or one of the two
1⁄8² plugs.
*
1Connect SQL line when required.
SQL*1
AF out
SEND
GND
FSKK GND AF2-conductor
1⁄8² plug[ACC]
[EXT SP]
1234 5678910111213
•Connection for AFSK
To a TU or TNC
and personal computer.
Use either the ACC or microphone connector.
SQL*
1
AF out
AF in
SEND
GND
1234 5678910111213
Rear panel
view
*1Connect SQL line when required.
q Mic input [MIC] connector
(Front panel view)
1
2
3
456 7
8
i AF output
u Mic GND
y PTT GND
t PTT
r SQL
[ACC] connector
4OPERATION 26 •RTTY (FSK) operation qConnect a terminal unit as at p. 25. wSelect RTTY (or RTTY-R) mode with [MODE]. eSelect the desired FSK tone and shift frequencies as below. rSet the desired frequency with the channel selec- tor. tOperate the connected PC or TNC (TO). PRESETTING FOR RTTY ¥ Tone frequency qPush [SET] for 1 sec. to enter quick set mode. wPush [ºUP]/[ÃDN] several times until ÒTON 2125Ó appears, then rotate the channel selector to select the desired tone frequency. ¥ Shift frequency qPush [SET] for 1 sec. to enter quick set mode. wPush [ºUP]/[ÃDN] several times until ÒSIFT 170Ó appears, then rotate the channel selector to select the desired tone frequency. ¥ RTTY reverse mode Received characters are occasionally garbled when the receive signal is reversed between MARK and SPACE. This reversal can be caused by incorrect TNC connections, settings, commands, etc. To receive a reversed RTTY signal correctly, select RTTY-R (RTTY reverse) mode. ¥ Push [MODE] for 1 sec. to select RTTY-R (RTTY re- verse) mode. •RTTY (AFSK) operation qConnect a terminal unit as on p. 25. wSelect SSB (LSB) mode with [MODE]. ¥ Generally, LSB is used on the HF bands. eSelect the desired FSK tone/shift frequencies and keying polarity the same way as FSK operation. rSet the desired frequency with the main dial. tOperate the connected PC or TNC (TO). RTTY mark frequency is set to 2125 Hz. 2125, 1615 and 1275 Hz are available. RTTY shift frequency is set to 850 Hz. 850, 425, 200 and 170 Hz are available. RTTY mode is selected. Reverse Normal BFO 170 Hz2125 Hz170 Hz 2125 Hz BFOmark space displayed freq. displayed freq.mark space
27 4OPERATION nChannel comment programming The IC-78 has a capability to assign up to 8-character channel comments for each operating channel. This provides easy recognition of channel usage, or station names, etc. qSelect the desired channel by pushing [ÃDN]/[UPº], rotating the channel selector, or using the keypad. (p. 13) wPush [FC] to select channel comment indication, if desired. ePush [ENT] for 1 sec. to enter channel comment programmable mode. ¥ 1st digit blinks rPush corresponding keys to enter desired charac- ters. (see the following chart) ¥ Push [ÃDN]/[UPº], or rotate the channel selec- tor to move the cursor to select the next charac- ter, or to change the digit. tPush [ENT] for 1 sec. to store the channel com- ment. •Corresponding characters (1),(space), (’), ( ( ),( ) ),(*),(+), (–),(/),(),(@) (4),(G),(H),(I) (7),(P),(R),(S)(space w/change digit) KEY Assignable characters (2),(A),(B),(C) (5),(J),(K),(L) (8),(T),(U),(V) (0),(Q),(Z) KEY Assignable characters (3),(D),(E),(F) (6),(M),(N),(O) (9),(W),(X),(Y) KEY Assignable characters Push for 1 sec. Push for 1 sec. • Channel comment programming example ´4 (I) ´4 (C) ´1 (2) ´4 (O) ´2 (M) ´2 (2 spaces) Push or rotate channel selector, then;
5 28 SET MODE nGeneral Set mode is used for programming infrequently changed values or conditions of functions. The IC-78 has 2 separate set modes: quick set modeand initial set mode . DQuick set mode operation qWhile power is ON, push [SET] for 1 sec. ¥ Quick set mode is selected and one of its items ap- pears. wPush [UPY] or [ZDN] to select the desired item. eRotate the main dial to set the values or conditions for the selected item. rRepeat wand eto set other items. tTo exit quick set mode, push [SET] momentarily. DInitial set mode operation qPush [PWR] for 1 sec. to turn power OFF. wWhile pushing and holding [SET], push [PWR] to turn power ON. ¥ Initial set mode is selected and one of its items appears. ePush [UPY] or [ZDN] to select the desired item. rRotate the main dial to set the values or conditions for the selected item. tRepeat eand rto set other items. yTo exit initial set mode, push [PWR] for 1 sec. to turn power OFF. uPush [PWR] to turn power ON again. ¥ The conditions selected in initial set mode are now ef- fective. Item Value of Condition Item Value of condition [DISPLAY EXAMPLE: INITIAL SET MODE] [DISPLAY EXAMPLE: QUICK SET MODE] [DIAL] [Ã][º][SET] [DIAL] [PWR] [Ã][º][SET]