Icom IC-7700 Instruction Manual - Page 47
Volume setting, RF gain adjustment, Squelch level adjustment
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■ Volume setting 3 BASIC OPERATIONS ➥ Rotate [AF] control clockwise to increase, counterclockwise to decrease the audio output level. [AF] Audio output decreases Audio output increases ■ RF gain adjustment [RF] Sensitivity decreases Sensitivity increases ■ Squelch level adjustment [SQL] [XFC] Noise squelch (Recommended level; FM mode only) Squelch is open S-meter squelch ➥ Rotate [RF] control clockwise to increase, counterclockwise to decrease the receiver sensitivity. NOTE: When [RF] control is adjusted CCW in FM mode, audio output decreases then disappears. This is normal, not a malfunction. The squelch mutes noise output from the speaker (closed squelch) when no signal is received. ➥ When no signal is received, rotate [SQL] control fully counterclockwise first, then rotate [SQL] clockwise to the point at which the noise disappears. • Push and hold [XFC] to open the squelch temporarily. 3-9