Icom IC-746PRO Instruction Manual

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Icom IC-746PRO Instruction Manual Manual pdf 15 page image

21PANEL DESCRIPTION• When functioning as RF gain control(Squelch is fixed open; SSB, CW, RTTY only)• When functioning as squelch control(RF gain is fixed at maximum.)While rotating the RF gain control, noise may beheard. This comes from the DSP unit and does notindicate an equipment malfunction.u MIC GAIN CONTROL [MIC GAIN]Adjusts microphone input gain.• The transmit audio tone in SSB, AM and FM modes canbe adjusted in tone control set mode. (p. 88) How to set the microphone gain.Set the [MIC] control so that the ALC meter sometimesswings during normal voice transmission in SSB mode.i AF CONTROL [AF] (inner control)Varies the audio output level from the speaker.o RF POWER CONTROL [RF PWR]Continuously varies the RF output power from min-imum (less than 5 W*) to maximum (100 W*) .* AM mode: less than 5 W to 40 W!0 CW PITCH CONTROL [CW PITCH] (p. 28)Shifts the received CW audio pitch and monitoredCW audio pitch without changing the operating fre-quency.• The pitch can be changed from 300 to 900 Hz in approx.25 Hz steps.!1 ELECTRONIC CW KEYER SPEED CONTROL[KEY SPEED] (p. 28)Adjusts the internal electronic CW keyer’s speed.• 6 wpm (min.) to 60 wpm (max.) can be set.!2 AUTO NOTCH/MANUAL NOTCH SWITCH[A/NOTCH] (p. 53)Toggles the notch function between manual and au-tomatic when pushed.• “NOTCH” appears when manual; “A NOTCH” appearswhen automatic notch is selected.!3 NOTCH CONTROL [NOTCH] (outer control; p. 53)Adjusts the notch filter frequency to remove a inter-ference signal.!4 ANTENNA SELECTOR SWITCH [ANT] (p. 75)Switches the antenna connector selection betweenANT1 and ANT2 when pushed.!5 NOISE REDUCTION LEVEL CONTROL [NR](inner control; p. 53)Adjusts the noise reduction level when the noise re-duction is in use. Set for maximum readability.!6 ANTENNA TUNER SWITCH [TUNER] (pgs. 76,77) Turns the antenna tuner ON and OFF (bypass)when pushed momentarily. Starts to tune the antenna manually whenpushed for 1 sec.• When the tuner cannot tune the antenna, the tuningcircuit is bypassed automatically after 20 sec.!7 NOISE REDUCTION SWITCH [NR] (p. 53)Switches the noise reduction ON and OFF.• “NR” appears while the noise reduction is activated.NR NOTCHOFFDecreases IncreasesNR NOTCHLow freuency High frequencySlow FastKEY SPEEDCW PITCHIncreasesDecreasesRF PWRIncreasesDecreasesAF RF/SQLNo audio output Max. audio outputDecreases IncreasesMIC GAINRecommended level foran Icom microphoneIncreasesDecreasesSquelch isopen.S-metersquelchS-meter squelchthresholdNoise squelchthreshold(FM mode)Shallow DeepNoise squelch (FM mode)Minimum RF gainAdjustablerangeMaximumRF gain