Icom iC-706MKTMG manual Noise blanker, AGC time constant, Preamp and attenuator, Peak meter hold

4 RECEIVE AND TRANSMIT

DNoise blanker

The noise blanker reduces pulse-type noise such as that generated by automobile ignition systems. This function is not effective for FM modes or for non pulse- type noise. If you don’t want to use the noise blanker for AM communications, the “AM noise blanker” item in Initial Set mode must be turned OFF (ON is the default setting—p. 53).

➀Select M3.

•Push [DISPLAY] 1 or 2 times when S or G is displayed.

•Push [MENU] one or more times to select M3.

➁Push [(F-2)NB] to toggle the noise blanker ON and OFF.

•“NB” appears when the noise blanker is turned ON.

USB

NB				Appears when the
		60dB VFO A
S1 3 5 7	9 20 40			noise blanker is
PO	5	10	CH
				turned ON.
M3 NAR		NB	MET

DAGC time constant

The AGC (Automatic Gain Control) controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading, etc. Use AGC slow for normal phone operation; AGC fast for receiving data and searching for signals. AGC time constant cannot be changed in FM mode.

➀Select M4.

•Push [DISPLAY] 1 or 2 times when S or G is displayed.

•Push [MENU] one or more times to select M4.

➁Push [(F-3)AGC] to toggle the AGC time constant between fast and slow.

•“FAGC” appears when the fast time constant is selected.

USB

		40 FAGC60dB			Appears when
S1 3 5 7 9	20		VFO A
PO	5	10		CH	AGC fast is
					selected.
M4 VOX		COM		AGC

DPreamp and attenuator

The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn this function ON when receiving weak signals.

The attenuator prevents desired signals from distort- ing when very strong signals are near the desired fre- quency or when very strong electric fields, such as from broadcasting stations, are near your location.

Push [P.AMP/ATT] momentarily to turn the preamp ON and OFF; push and hold to turn the attenuator ON.

•Lights green when the preamp is ON; lights red when the 20 dB attenuator is ON.

•Only one of these functions can be activated at a time.

P.AMP/ATT

Lights green while the preamp is activated; lights red while the attenuator is activated.

DPeak meter hold

INITIAL SET MODE

The peak meter hold function freezes the highest dis- played bar segment in any meter function for about

0.5sec. so that you can more easily read the meter. This function can be turned ON and OFF in initial set mode (see p. 51).

[EXAMPLE]:

S1	3	5	7	9	20	40	60dB	Initial reception	of a
								signal results in an S-
								meter reading	of 40
								dB.
S1	3	5	7	9	20	40	60dB	The highest indicated
								bar remains displayed
								for about 0.5	sec.
								even when the signal
								strength decreases.

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