Icom IC-78 Instruction Manual - Page 19

4 OPERATION ï Microphone compressor IC-78 has a built-in, low distortion Mic compressor circuit. This circuit increases your average talk power in SSB mode and is especially useful when the receiving station is having difficulty copying your signal. q Select USB or LSB mode. w Push [COMP] switch to turn mic compressor ON. [COMP] switch e Confirm the ALC level. • Push [SET] to select the ALC meter. • Speak into the microphone at a normal voice level. • If the ALC meter peak past the ALC zone, re-adjust the mic. gain. (p.16) • Be sure the mic gain is in the range of 20 to 50. ALC zone Adjust [MIC GAIN] so that the ALC meter reads within the ALC zone. Note: When the ALC meter peaks above the ALC zone, your transmitted voice may be distorted. • "COM" indicator appears. Appears when mic compressor is activated. ï VOX operation The VOX (Voice-operated Transmission) function switches between transmit and receive with your voice. This function provides an opportunity to input log entries into your computer, etc. while operating. q Select "VOX" in quick set mode. • Push [SET] for 1 sec. to select quick set mode. • Push [∫ UP]/[√ DN] to select "VOX". w Rotate the channel selector to turn VOX function ON. Rotate the channel selector OFF ON e Select "VOX GAIN" in quick set mode. • Push [∫ UP]/[√ DN] to select "VOX". r While speaking into the microphone, adjust [VOX GAIN] with the channel selector, until the trans- ceiver is transmitting. t Select "VOX DELY" in quick set mode. • Push [∫ UP]/[√ DN] to select "VOX Delay" t While speaking into the microphone, adjust [VOX DELY] as desired. y Select "ANTI-VOX" in quick set mode. • Push [∫ UP]/[√ DN] one or more times to select "AN VOX" u If the receive audio from the speaker switches the transceiver to transmit during receive, adjust the "ANTI-VOX" to the point where it has no effect. i Push [SET] to exit quick set mode. 17