Icom IC-7700 Instruction Manual - Page 81

4 RECEIVE AND TRANSMIT ■ Operating AM [MIC] [TX] indicator [RX] indicator Band keys [AF] AM/FM Appears Main dial q Push a band key to select the desired band. w Push AM/FM to select AM. • "AM" indicator appears. • After AM mode is selected, push AM/FM to toggle be- tween AM and FM modes. e Rotate the main dial to tune to the desired fre- quency. • The S-meter indicates received signal strength when signal is received. r Rotate [AF] to set audio to a comfortable listening level. t Push TRANSMIT or [PTT] (microphone) to transmit. • The TX indicator lights red. y Speak into the microphone at your normal voice level. • Adjust the microphone gain with [MIC] at this step, if necessary. u Push TRANSMIT or release [PTT] (microphone) to return to receive. D Convenient 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. • Push and hold [P.AMP] (MF3) for 1 sec. to turn the preamp function OFF. • "P.AMP1" or "P.AMP2" appears when the preamp 1 or preamp 2 is ON. • Attenuator (p. 5-9) ➥ Push [ATT] (MF4) several times to set the attenu- ator in 6 dB steps. • Push and hold [ATT] (MF3) for 1 sec. to turn the atten- uator function OFF. • "ATT" and attenuation level appear when the attenu- ator is ON. • Noise reduction (p. 5-17) ➥ Push NR to turn the noise reduction ON and OFF. • Rotate [NR] control to adjust the noise reduction level. • Noise reduction indicator (above NR switch) lights when the noise reduction is ON. • Audio tone control (p. 12-4) ➥ Push [SET] F-7 then [LEVEL] F-1 to enter level set mode. Select an item with [Y] F-1 /[Z] F-2 then rotate the main dial to adjust the audio tone. • Twin PBT (passband tuning) (p. 5-12) ➥ Rotate [TWIN PBT] controls (inner/outer). • PBT indicator (above PBT-CLR switch) lights when PBT is in use. • Push and hold PBT-CLR for 1 sec. to clear the settings. • Noise blanker (p. 5-16) ➥ Push NB to turn the noise blanker ON and OFF, and then rotate [NB] control to adjust the threshold level. • Noise blanker indicator (above NB switch) lights when the noise blanker is ON. • Push and hold NB for 1 sec. to enter noise blanker set mode. • 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 either the auto or manual notch is ON. • AGC (auto gain control) (p. 5-11) ➥ Push [AGC] switch several times to select AGC FAST, AGC MID or AGC SLOW. ➥ Push AGC VR to turn the AGC time constant manual setting ON and OFF. • Rotate [AGC] control to adjust the time constant. • Auto tuning function (p. 5-19) ➥ Push [AUTOTUNE] to turn the auto tuning func- tion ON and OFF. • The transceiver automatically tunes the desired sig- nal within ±5 kHz range. IMPORTANT! When receiving a weak signal, or receiving a signal with interference, the automatic tuning function may not tune, or may tune to an undesired signal. 4-29