Icom IC-7100 Instruction Manual

Also see for IC-7100: Finger touch operation Specification Basic Manual Service manual Advanced instructions

Contents

Icom IC-7100 Instruction Manual Manual pdf 50 page image

5 FUNCTIONS FOR RECEIVE5-3Previous viewThe AGC (Auto Gain Control) controls receiver gain toproduce a constant audio output level, even when thereceived signal strength greatly varies.The transceiver has 3 pre-set AGC time constants: fast,mid and slow for SSB, CW, RTTY and AM modes.In the FM , WFM and DV modes, the AGC time con-stant is fi xed as “FAST” (0.1 second).AGC speed selectionDOn the Mode selection screen, select either the SSB,qCW, RTTY or AM mode. (p.3-??)Pushw MENU (C) one or more times to select the“M-2” screen (M-2 menu).Touch [AGC](e D) to select AGC-F (FAST), AGC-M(MID) or AGC-S (SLOW).“AGC OFF” appears when the selected AGC speed’stime constant is set to OFF.Setting the AGC time constantD On the Mode selection screen, select either the SSB,qCW, RTTY or AM mode. (p.3-??)Pushw MENU (C) one or more times to select the“M-2” screen (M-2 menu).Touch [AGC](e D) for 1 second to display the “AGC”screen.Touch either [FAST]r , [MID] or [SLOW](D) to selectthe desired AGC speed to be set.• The selected AGC speed’s time constant is highlighted.Rotate the Dial to set the selected time constant.t• AGC time constant can be set to between 0.1 to 8.0 sec-onds, (depending on the mode) or turned OFF.• If desired, touch [DEF](D) for 1 second to reset to thedefault setting for the selected time constant.If desired, select another mode (any other than FM,yWFM or DV), then repeat steps e and r.Pushu MENU (C) to exit the “AGC” screen.• Selectable AGC time constant (unit: seconds)Mode Default Selectable AGC time constantSSB0.3 (FAST) OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,1.6 , 2.0, 2.5, 3.0, 4.0, 5.0, 6.02.0 (MID)6.0 (SLOW)CW/RTTY0.1 (FAST) OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,1.6 , 2.0, 2.5, 3.0, 4.0, 5.0, 6.00.5 (MID)1.2 (SLOW)AM3.0 (FAST) OFF, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.05.0 (MID)7.0 (SLOW)FM/WFM/DV 0.1 (FAST) FixedFor your informationWhen you are receiving a weak signal, and a strongsignal is momentarily received, the AGC functionquickly reduces the receiver gain. When that signaldisappears, the transceiver may not receive the weaksignal because of the AGC action. In that case, holddown [AGC](D) for 1 second, and rotate the Dial toset the time constant to OFF.AGC functionThe L, R, C or D in theinstructions indicate thepart of the controller.L: Left sideR: Right sideC: Center bottomD: Display (Touch panel)Left RightCenterDisplay• When AGC-M (MID) is selected• When AGC-F (FAST) is selected• When AGC-S (SLOW) is selectedTouch [AGC] for1 secondSelected AGC speed’s time constant displaySelected mode