Icom IC-7700 Instruction Manual - Page 13

1 PANEL DESCRIPTION u MICROPHONE CONNECTOR [MIC] Accepts an optional microphone. • See p. 15-4 for appropriate microphones. • See p. 2-10 for microphone connector information. 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. 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 Decreases Increases o VOX SWITCH VOX ➥ Push to turn the VOX function ON and OFF during 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. !0 RF 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 !1 BREAK-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. !2 ELECTRONIC CW KEYER SPEED CONTROL [KEY SPEED] (p. 4-4) Adjusts keying speed for the internal electronic CW keyer. • 6 wpm (min.) to 48 wpm (max.) is the available range. Max. 48 wpm Min. 6 wpm !3 MONITOR 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. !4 BREAK-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 !5 AGC 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 !6 SQUELCH CONTROL [SQL] (outer control; p. 3-9) Adjusts the squelch threshold level. The squelch mutes noise output from the speaker (closed condition) 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 Squelch threshold Noise squelch Shallow Squelch is open Shallow S-meter squelch Deep 1-3