Manual Icom IC-910H (page 30 of 88) (English)

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RECEIVE AND TRANSMIT

■ AGC time constant

The AGC (Automatic Gain Control) controls receiver

gain to produce a constant output level even when the

received signal strength is varied by fading, etc. Use

AGC slow for normal phone operation; AGC fast for re-

ceiving data and searching for signals.

➥ Push [AGC] to switch the time constant between

fast and slow.

•“FAGC” indicator appears when AGC fast is selected.

• The AGC time constant is ﬁxed in FM mode regardless

of the FAGC indicator.

The SUB band’s AGC is automatically selected as

slow in SSB and fast in CW. AGC time constant cannot

be changed in FM mode.

■ AFC function

The AFC (Automatic Frequency Control) automatically

tunes the operating frequency when receiving an off-

frequency signal or receiving signal shifts in FM or FM

narrow mode.

➥ Push [AFC/NB] to turn the AFC function ON and

OFF.

•“AFC” indicator appears when the AFC function is acti-

vated.

When strong nearby signals are available, the AFC

function may tune to those signals.

■ FM center indicator

The MAIN/SUB band indicators indicate the received

signal deviation in FM mode. When an off-center sig-

nal is received, the indicator ﬂashes.

When an off-center signal is received, rotate the tun-

ing dial or use the RIT function to illuminate the indica-

tor continuously.

The FM center indicator can be turned OFF using the

FM set mode. (p. 61)

[AGC]

VFO A

AGCAGC

[AFC/NB]

VFO A

AFCAFC

Flashes in 300 msec. intervals.

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Icom IC-910H Manual

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