Icom IC-7700 Instruction Manual - Page 113

6 FUNCTIONS FOR TRANSMIT ■ Transmit filter width setting (SSB only) The transmit filter width for SSB mode can be selected from wide, middle and narrow. COMP ➥ During USB or LSB mode selection, push and hold [COMP] (MF6) for 1 sec. several times to select the desired transmit filter width from wide, middle and narrow. • The filter can be independently set on the speech compressor 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. 12-6) WIDE : 100 Hz to 2.9 kHz MID : 300 Hz to 2.7 kHz NAR : 500 Hz to 2.5 kHz ■ Speech compressor (SSB only) [MIC] METER COMP [DRIVE] [COMP] control COMP zone 5 9 +20 +40 1 +60dB 5 10 S 0 ID Po 0 10 SWR 10 COMP 50 1.5102 ALC ∞ 100 150 3 20 200 15 250 W A dB 44 52V VD The speech compressor increases average RF output power in SSB mode only, improving signal strength and readability. q Select USB or LSB mode and adjust [MIC] to a suitable level. • Push [METER] (MF2) several times to select the ALC meter for microphone gain adjustment. w Push [COMP] (MF6) to turn the speech compressor ON. e Push [METER] (MF2) once to select the COMP meter. r While speaking into the microphone, rotate [COMP] control, 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. t Push [METER] (MF2) 5 times to select the ALC meter. y While speaking into the microphone, rotate [DRIVE], so that the ALC meter reads within the 30 to 50% range of the ALC zone with your normal voice level. ✔ For your convenience Push and hold [METER] (MF2) for 1 sec. to display the multi-function meter that can check the ALC and COMP level at a glance. 6-5