Icom IC-F7000 service manual Receiver Adjustments

5-4 RECEIVER ADJUSTMENTS

”TOTAL GAIN”, “S-METER” and “DSC PEAK” adjustments must be performed at “ADJUSTMENT MODE”.

ADJUSTMENT		ADJUSTMENT CONDITIONS			MEASUREMENT			VALUE	ADJUSTMENT
				UNIT		LOCATION			UNIT	ADJUST
NOISE NULL	1	• Operating frequency	: 0.5 MHz	Front		Connect an AC milli-		Minimum output	MAIN	R217,
POINT		• Mode	: A3E	panel		voltmeter to	the [SP]	level		R218
		• Preset L209 parallel to top edge of its				jack with a 4 Ω	dummy
		chassis.				load.
		• Preset L401, L403, L404, L405 and
		L801 to max. counter clockwise.
		• Set the standard signal generator to
		OFF (no signal output).
		• Receiving
RECEIVER	1	• Operating frequency	: 13.9210 MHz	Front		Connect an AC milli-		Maximum out-	MAIN	L207,
GAIN		• Mode	: J3E	panel		voltmeter to	the [SP]	put level		L208,
		• Connect a standard signal generator				jack with a 4 Ω	dummy			L210,
		to the [ANT] connector and set as:				load.				L211
		Frequency	: 13.9210 MHz
		Level	: 0.5 µV*
			(–113 dBm)
		Modulation	: OFF
		• Receiving
TOTAL GAIN	1	• While pushing HM-146’s [CALL]		• Push the [OK] switch to write the adjustment value in the memo-
		switch and RC-26’s [EMG] switch,		ry.
		then turn power ON.
		• Push [2] switch to enter the RX adjust-
		ment mode.
		• Connect a standard signal generator
		to the [ANT] connector and set as:
		Frequency	: 13.9210 MHz
		Level	: 320 µV*
			(–57 dBm)
		Modulation	: OFF
		• Receiving
S-METER	1	• Set the standard signal generator to		• Push the [OK] switch to write the adjustment value in the memo-
		OFF (no signal output).		ry.
	2	• Set the standard signal generator as:		• Push the [OK] switch to write the adjustment value in the memo-
		Frequency	: 13.9210 MHz	ry.
		Level	: 10 mV*
			(–27 dBm)
		• Receiving

*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.

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