Icom IC-7600 Instruction Manual - Page 93

4 RECEIVE AND TRANSMIT ■ Speech compressor SSB The speech compressor increases average RF output power, improving signal strength and readability. q P ush [SSB] to select USB or LSB mode. w P ush and hold [COMP] (MF7) for 1 sec. to select COMP TBW set screen. e A djust the [MIC GAIN] control so that the ALC meter reads within the ALC zone, whether or not you speak softly or loudly. r P ush [COMP] (MF7) to turn the speech compressor ON. t W hile speaking into the microphone, rotate the main dial, so that the COMP meter reads within the COMP zone (10 to 20 dB range) for your normal voice level. When the COMP meter peaks exceed 20 dB, your transmitted voice may be distorted. y P ush [COMP] (MF7) or [EXIT/SET] to exit COMP TBW set screen. u A djust the drive gain to set the ALC meter reading within the 30 to 50% range of the ALC scale. (p. 37) COMP [MIC GAIN] SSB • COMP/TBW set screen EXIT/SET Main dial Speech compressor is OFF Speech compressor is ON ■ Transmit filter width setting SSB The transmit filter width for SSB mode can be selected from wide, middle and narrow. q P ush [SSB] to select USB or LSB mode. w P ush and hold [COMP] (MF7) for 1 sec. to select COMP TBW set screen. e P ush [COMP] (MF7) to turn the speech compres- sor ON or OFF. r P ush [TBW] (F-3) several times to select the desired transmit filter width from wide, middle and narrow. • The filter can be independently set on the speech com- pressor function is ON and OFF. • The following filters are specified as the default. Each of the filter width can be re-set in level set mode. (p. 122) WIDE : 100 Hz to 2.9 kHz MID : 300 Hz to 2.7 kHz NAR : 500 Hz to 2.5 kHz t P ush [COMP] (MF7) or [EXIT/SET] to exit COMP TBW set screen. COMP SSB F-3 TBW EXIT/SET "WIDE" setting 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 86