Icom IC-4008MKII service manual Adjustment, Deviation

5-2 ADJUSTMENT

				MEASUREMENT			ADJUSTMENT
ADJUSTMENT		ADJUSTMENT CONDITION				VALUE	POINT
				UNIT	LOCATION		UNIT	ADJUST
REFERENCE	1	• Operating channel : Ch 35		Top	Loosely couple a fre-	433.925000 MHz	RF	C63
FREQUENCY		• Transmitting		panel	quency counter to the
					antenna.
OUTPUT	1	• Operating channel : Ch 35		RF	Connect an RF power	9 mW [ITA/–1]	RF	R206
POWER		• Transmitting			meter to the RF test	470 mW [CSA/–1]
					port J1.
FM	1	• Operating channel : Ch 01		RF	Connect an FM devia-	±4.8 kHz	RF	R50
DEVIATION		• Connect an audio generator to the			tion meter to the RF
		[MIC] jack and set as:			test port J1.
		1 kHz/100 mV rms
		• Set an FM deviation meter as:
		HPF	: OFF
		LPF	: 20 kHz or 15 kHz
		De-emphasis	: OFF
		Detector	: (P–P)/2
		• Set group No.	: 01
		• Transmitting
	2	• Set group No.	: OFF (– –)			10 mV ±3 dB		Verify
		• Set an audio generator output level
		until the deviation is ±3.5 kHz.
		• Transmitting
SQUELCH	1	• Operating channel : Ch 35		Front	Internal speaker		Front	Push
		• Connect an SSG to J1 on the RF unit		panel			panel	and hold
		and set as:						[MODE]
		Level	: 0.14 µV*					and
			(–124 dBm)					[DOWN]
		Modulation	: OFF
		• Receiving
	2	• Set an SSG as	:			Audio signal		Verify
		Level	: OFF			disappears.
		• Receiving

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