Microphone Compressor; Vox Function - Icom IC-718 Basic Manual

4
RECEIVING AND TRANSMITTING

Microphone Compressor

SSB mode
The Speech Compressor increases the average RF
output power, improving readability at the receiving
station. This function compresses the transmitter
audio input to increase the average audio output level.
L The function is effective for long-distance
communication, or when propagation conditions are
poor.
Setting before using the Microphone Compressor
function
1. Select the SSB mode. (Example: USB)
2. Push [SET].
• Enters the Quick Set mode.
3. Push [UP▲] or [▼DN] to select "MIC GAIN."
4. Adjust the microphone gain by rotating [MAIN
DIAL].
L Be sure the microphone gain is in the range of 20 to
50.
5. Push [SET] to exit the Quick Set mode.
Using the Microphone Compressor function
1. Push [COMP] to turn ON the microphone
compressor.
L "COM" is displayed while the function is ON.
2. Push [SET] until the ALC meter is displayed.
L Pushing [SET] toggles the meter to Po, SWR, ALC.
3. While speaking into the microphone at your
normal voice level, rotate [MAIN DIAL] to adjust
the Speech Compressor level to where the ALC
meter reads within the ALC zone.
ALC zone
L If the ALC meter peaks exceed the ALC zone, your
transmitted voice may be distorted.
16

VOX function

The Voice-operated Transmission (VOX) function
switches between transmit and receive with your
voice. This function enables hands-free operation.
Push [VOX] to turn the VOX function ON or OFF.
• "VOX" is displayed while the VOX function is ON.
D Adjusting the VOX function
Before using the VOX function, adjust the following
items in the Quick Set mode.
• VOX Gain (p. 19)
• VOX Delay (p. 19)
• Anti VOX Level (p. 19)
1. Push [VOX] to turn the VOX function ON.
2. Push [SET] to enter the Quick Set mode.
3. Push [UP▲] or [▼DN] to select "VOX GAIN."
4. While speaking at your normal voice level, rotate
[COMP]
5. Push [UP▲] or [▼DN] to select "VOX Delay."
6. While speaking at your normal voice level, rotate
7. Push [UP▲] or [▼DN] to select "Anti VOX" (AN-
8. Adjust the Anti VOX level to prevent unwanted
9. Push [SET] to exit the Quick Set mode.
[MAIN DIAL] to adjust the VOX gain until the
transceiver transmits.
[MAIN DIAL] to adjust the VOX delay to between 0
and 2 seconds.
VOX.)
VOX activation from the speaker or other sounds.
[VOX]