Icom IC-820H Instruction Manual page 17

@ Basic CW operation
@ Connect a CW keyer or an external electronic
keyer to the [KEY] jack on the rear panel.
- See p. 11 for connection details.
(@) Make sure the initial settings are complete.
() Push [M/S] to select the desired band, VHF or
UHF, as the main band.
@ Push [SSB/CW] to select CW or CW-Narrow*
mode.
- Pushing [SSB/CW] sequentially selects USB, LSB,
CW and the optional CW-Narrow mode.
* An optional FL-132 CW NARROW FILTER is necessary
to operate the CW-Narrow mode. The optional CW-
Narrow mode can be used on the main band only.
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(5) Rotate [AF (MAIN)] clockwise to adjust the desired
audio output level.
- Adjust the [SQL (MAIN)]} control when you want to
eliminate the floor noise.
(6) Rotate the tuning dial to set the desired fre-
quency.
- See p. 21 for frequency setting details.
- When receiving a signal, the S/RF meter shows the
relative signal strength.
@ Push the connected key down to transmit the CW
signal.
- When the break-in function is OFF in the F-set mode,
push IN the [TRANSMIT] switch im advance. (p. 40)
Adjust [DELAY] control to your desired switching
speed for returning transmit to receive.
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( Adjust [CW SIDE TONE] to the desired CW side
tone level.
- The side tone level can be changed relative to both
[AF] and [CW SIDE TONE] controls. (p. 47)
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ZY ° RIT function Lndilavle hen cebia ist ak arevrd 0.9 SS OI 0:4 Bio Wine SieE atore atic (p. 24)
Y . Noise blanker falta ois savelior hte o:65 8b brase aces keto wie nu aerae ae (p. 23)
Y, r) Attenuatoi BS vga Pee eh Signa ate casehend Ole aie eb doe sie aLeeIe (pgs. 23, 39)
j * Pre-amplifier (optional) ----+-+--+++++ (pgs. 23, 40)
Y, ° AGC slow eT eS re re wen ene ewer a (p. 23)
Yj * pill MeQUENCY OPEraliony sstesteertanieers (p. 26)
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Y ¢ CW-Narrow mode (optional) ----:--+++++--++ (p. 45)
Set the internal switches to an appropriate position in
advance. (pgs. 47, 48) Connect an external equip-
ment to the ACC(1) socket as descried on pgs. 9 and
14.
@) Turn power ON with [POWER].
@) Select LSB, USB or FM.
- LSB is normally used.
- FM is used for PACKET.
(3) Set the desired frequency.
) Adjust the audio output level with [AF].
- Use [SQL] when required.
(©) Select the desired RF output power.
- When using the [MIC] connector for external equip-
ment connection, the [MIC] control should be ad-
justed.
© Control the transceiver from the external TU or
TNC.
Operaiing notes for RTTY and AMTOR
® RTTY or AMTOR operating frequency in LSB mode
differs from the displayed frequency.
[Your operating freq.] = [Displayed freq.] — 2125 Hz
(when the frequencies of the RTTY demodulator in your
TU or TNC are mark=2125 Hz and space=2295 Hz).
Operating notes for PACKET
* PACKET operating frequency in LSB mode differs
from the displayed frequency.
[Your operating freq.] = [Displayed freq.] — 2215 Hz
(when the frequencies of the PACKET demodulator in
your TNC are 2115 Hz/2315 Hz).
Frequency setting example for AFSK
- When operating RTTY at 144.090 MHz:
Set "LSB 144.092125 MHz" (if you use mark=2125
Hz/space= 2295 Hz).
- When operating PACKET at 144.110 MHz:
Set "LSB 144.112215 MHz" (if you use 2115 Hz/
2315 Hz).
BASIC OPERATION 4
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