Agc Time Constant; Afc Function; Fm Center Indicator - Icom IC-910H Instruction Manual

5
RECEIVE AND TRANSMIT
n 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.
n 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.
n 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)
28
[AGC]
CW
F
AGC
[AFC/NB]
FM
AFC
Flashes in 300 msec. intervals.
VFO A
VFO A