u MICROPHONE CONNECTOR [MIC] Accepts an optional microphone.

• See p. 15-4 for appropriate microphones.

• See p. 2-10 for microphone connector information.

PANEL DESCRIPTION

1

!2ELECTRONIC CW KEYER SPEED CONTROL [KEY SPEED] (p. 4-4)

Adjusts the internal electronic CW keyer’s speed.

• 6 wpm (min.) to 48 wpm (max.) is the available range.

i MIC GAIN CONTROL [MIC] (p. 3-12)

Adjusts microphone input gain.

• The transmit audio tone in SSB, AM and FM modes can

be adjusted independently in set mode. (p. 12-5)

✔How to set the microphone gain.

Min.

6 wpm

Max.

48 wpm

Set the [MIC] control so that the ALC meter occasionally moves up-scale during normal voice transmission in SSB, AM or FM mode.

Recommended level for

an Icom microphone

Increases

 

Decreases

Increases

Decreases

 

o VOX SWITCH VOX

➥Push to turn the VOX function ON and OFF dur- ing SSB, AM and FM mode operation. (p. 6-2)

➥Push and hold for 1 sec. to enter VOX set mode. (p. 6-2)

✔What is the VOX function?

The VOX function (voice operated transmission) activates transmission without pushing the transmit switch or PTT switch when you speak into the microphone; then automatically returns to receive when you stop speaking.

!0RF POWER CONTROL [RF PWR] (p. 3-12) Continuously varies the RF output power from minimum (5 W*) to maximum (200 W*).

*AM mode: 5 W to 50 W

Increases

Decreases

!1BREAK-IN SWITCH BK-IN

Push to turn the break-in function ON (semi-break-in, full-break-in) and OFF during CW mode operation. (p. 6-3)

✔What is the break-in function?

The break-in function switches transmit and receive with CW keying. Full break-in (QSK) can monitor the receive signal between CW dots and dashes.

!3MONITOR SWITCH MONITOR (p. 6-4)

Monitors your transmitted IF signal.

•The CW sidetone functions regardless of MONITOR switch setting in CW mode.

•The [MONITOR] indicator above this switch lights green while the function is activated.

!4BREAK-IN DELAY CONTROL [DELAY] (p. 6-3) Adjusts the transmit-to-receive switching delay time for CW semi-break-in operations.

Long delay for slow speed keying

Short delay for high speed keying

!5AGC CONTROL [AGC] (p. 5-11)

Adjusts the continuously-variable AGC circuit time constant.

• To use [AGC] control, push AGC VR ([AGC VR] indicator lights).

Slow

Fast

!6SQUELCH CONTROL [SQL] (outer control; p. 3-9)

Adjusts the squelch threshold level. The squelch mutes noise output from the speaker (closed condi- tion) when no signal is received.

•The squelch is particularly effective for FM. It is also available in other modes.

•The 11 to 12 o’clock position is recommended for the most effective use of the [SQL] control.

Deep

Noise squelch

Squelch

 

 

threshold

 

 

Shallow

 

S-meter

 

squelch

Squelch is

 

 

open

 

Deep

Shallow

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