Icom IC-F51, IC-F50 service manual Software Adjustments Receiving, Convenient

SOFTWARE ADJUSTMENTS (RECEIVING)

•Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.

•Need to adjust “S-METER ADJUSTMENT” after “RX SENSITIVITY ADJUSTMENT” is adjusted. Otherwise, “S-METER ADJUSTMENT” will not be adjusted properly.

ADJUSTMENT		ADJUSTMENT CONDITION			MEASUREMENT	VALUE
				UNIT	LOCATION
RX	1	• Operating CH	: CH11	MAIN	Connect a SINAD meter with an	Minimum distortion
SENSITIVITY		• Connect a standard signal generator to			8 Ω load to the multi connector	level
[BPF T1],		the antenna connector and set as:			through the JIG cable (*OPC-
[BPF T2]		Frequency	: 136.000 MHz		966).
		Level	: 10 µV* (–87 dBm)
		Modulation	: 1 kHz
		Deviation	: ±3.5 kHz
		• Receiving
		CONVENIENT:
		The BPF T1, BPF T2 can be adjusted automatically.
		q-1: Set the cursor to “BPF ALL” on the adjustment program and then push [ENTER] key.
		q-2: The connected PC tunes BPF T1, BPF T2 to peak levels.
			or
		w-1: Set the cursor to one of BPF T1, T2 as desired.
		w-2: Push [ENTER] key to start tuning.
		w-3: Repeat w-1 and w-2 to perform additional BPF tuning.
S-METER	1	• Operating CH	: CH11	Push [ENTER] key on the connected computer keyboard to
[S-METER]		• Connect an SSG to the antenna con-		set “S6 level”.
		nector and set as:
		Frequency	: 136.000 MHz
		Level	: 4.5 µV* (–94 dBm)
		Modulation	: 1 kHz
		Deviation	: ±3.5 kHz
		• Receiving
	2	• Set an SSG as	:	Push [ENTER] key on the connected computer keyboard to
		Level	: 0.25 µV* (–119 dBm)	set “S1 level”.
		Modulation	: 1 kHz
		Deviation	: ±3.5 kHz
		• Receiving
SQUELCH	1	• Operating CH	: CH9	Front	Internal speaker	Set “SQL level” to
LEVEL		• Connect an SSG to the antenna con-		panel		close squelch.
[SQL]		nector and set as:				Then set “SQL level”
		Frequency	: 155.000 MHz
						at the point	where
		Level	: 0.18 µV* (–122 dBm)
						the audio	signals
		Modulation	: 1 kHz
						just appears.
		Deviation	: ±3.5 kHz
		• Receiving

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

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