Icom IC-R20 Instruction Manual - Page 32

4 BASIC OPERATION ■ Attenuator function The attenuator prevents a desired signal from distorting when very strong signals are near the desired frequency or when very strong electric fields, such as from a broadcasting station, are near your location. The attenuator gain is about 30 dB. ➥ Push [ΩΩ ATT] for 1 sec. to toggle the attenuator function ON and OFF. • "ATT" appears when the attenuator function is in use. DUALWATCH MAIN/SUB POWER BAND DIAL.SEL 1 T-SCAN 4 TONE 7 ATT VFO MHz SWEEP 2 SKIP 5 SET 8 RF GAIN MODE SCAN CENTER MR S.MW 3 SCOPE M.N 6 0 AFC TS 9 LOCK IC Recorder REC -DUP TSQL AFC MODE FM ANL 146 010 √ ATT ATT PSKIP "ATT" appears while the attenuator functions is in use. ■ RF gain The receiver gain can be reduced with the RF gain setting. This may help to remove undesired weak signals while monitoring strong signals. The RF gain may be useful for setting a minimum level at which to hear signals for SSB/CW modes . ➥ Push [≈≈ RF GAIN] for 1 sec. to enter the RF gain setting condition, then rotate [R-DIAL] to select the desired RF gain level. • Normally this setting is used with maximum level. • Push [DUALWATCH] to exit the RF gain setting condition. [R-DIAL] RF GAIN -DUP TSQL MODE USBANL AFC 14120 PSKIP √ SET-RF-GAIN:MAX Maximum level -DUP TSQL MODE USBANL AFC 14120 PSKIP √ SET-RF-GAIN:5 Setting level5 19