Icom IC-7700 ■Operating CW, Preamp, •Attenuator (p. 5-9), • 1⁄4 function (p. 3-6), • Noise blanker (p. 5-16), • Noise reduction (p. 5-17), •Manual notch filter (p. 5-18)

4 RECEIVE AND TRANSMIT

■Operating CW

[KEY SPEED] [TX] indicator [RX] indicator Band keys

TRANSMIT [AF]

Main dial

Appears

qPush a band key to select the desired band.

w Push CW to select CW.

• After CW mode is selected, push CW to toggle between CW and CW-R modes.

• “CW” or “CW-R” appears.

eRotate the main dial to tune a desired signal.

•Try to match the specified signal’s tone to the side tone frequency.

•The S-meter indicates received signal strength when signal is received.

rRotate [AF] to set audio to a comfortable listening level.

tPush TRANSMIT to transmit.

• [TX] indicator lights red.

yUse the electric keyer or paddle to key your CW sig- nals.

•The power meter indicates transmitted CW output power.

uAdjust CW speed with [KEY SPEED].

• Adjustable within 6–48 WPM.

i Push TRANSMIT to return to receive.

DConvenient functions for receive

•Preamp (p. 5-9)

➥Push [P.AMP] (MF3) several times to set the pre- amp OFF, preamp 1 ON or preamp 2 ON.

•“P.AMP1” or “P.AMP2” appears when the preamp 1 or preamp 2 is ON.

•Twin PBT (passband tuning) (p. 5-12)

➥Rotate [TWIN PBT] controls (inner/outer).

•PBT indicator (above PBT-CLRswitch) lights when PBT is in use.

•Push and hold PBT-CLRfor 1 sec. to clear the set- tings.

•Attenuator (p. 5-9)

➥Push [ATT] (MF4) several times to set the attenu- ator in 6 dB steps.

•Push and hold [ATT] (MF4) for 1 sec. to turn the attenuator function OFF.

•“ATT” and attenuation level appear when the attenu- ator is ON.

•Manual notch filter (p. 5-18)

➥Push NOTCH to turn the manual notch function ON and OFF.

•Rotate [NOTCH] control to set the attenuating fre- quency.

•Notch indicator (above NOTCH switch) lights when the manual notch is ON.

• Noise blanker (p. 5-16)							• AGC (auto gain control) (p. 5-11)
➥ Push	NB	to turn the noise blanker ON and
OFF, and then rotate [NB] control to adjust the							➥ Push	[AGC] switch several times to select
threshold level.							AGC FAST, AGC MID or AGC SLOW.
• Noise blanker indicator (above					NB	switch) lights	➥ Push	AGC VR	to turn the AGC time constant
when the noise blanker is ON.							manual setting ON and OFF.
• Push and hold			NB	for 1 sec. to enter noise blanker			• Rotate [AGC] control to adjust the time constant.
set mode.							• 1⁄4 function (p. 3-6)
• Noise reduction (p. 5-17)
							➥ Push [1/4] to turn the 1⁄4 function ON and OFF.
➥ Push	NR	to turn the noise reduction ON and					• Auto tuning function (p. 5-19)
OFF.
• Rotate [NR] control to adjust the noise reduction							➥ Push [AUTOTUNE] to turn the auto tuning func-
level.							tion ON and OFF.
• Noise reduction indicator (above						switch) lights	• The transceiver automatically tunes the desired sig-
					NR
when the noise reduction is ON.							nal within a ±500 Hz range.

IMPORTANT!

When receiving a weak signal, or receiving a signal with interference, the automatic tuning function may not tune properly, or tune onto an undesired signal.

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