Icom IC F121S, IC F110S, IC F111S service manual Software Adjustment, Convenient

SOFTWARE ADJUSTMENT – continued

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

ADJUSTMENT		ADJUSTMENT CONDITION					MEASUREMENT	VALUE
						UNIT	LOCATION
RX	1	• Operating freq. :		136.000 MHz		MAIN	Connect a SINAD meter with a	Minimum distortion
SENSITIVITY		• IF bandwidth	: Wide				4 Ω load to the external [SP]	level
[BPF T1],		• Connect a standard signal generator to					jack.
[BPF T2]		the antenna connector and set as:
		Frequency	:	136.000 MHz
		Level	:	10 µV* (–87 dBm)
		Modulation	:	1 kHz
		Deviation	: ±3.5 kHz		[N/W]
				±2.8 kHz	[N/M]
		• Receiving
		CONVENIENT:
		The BPF T1–BPF T2 can be adjusted automatically.
		q-1: Set the cursol 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 cursol to BPF T1 or BPF T2 as desired.
		w-2: Push [ENTER] key to start tuning.
		w-3: Repeat w-1 and w-2 to perform additional BPF tuning.
SQUELCH	1	• Operating freq. :		155.000 MHz		Rear	Connect a SINAD meter with a	Set “SQL level” to
LEVEL		• IF bandwidth	: Narrow			panel	4 Ω load to the external [SP]	close squelch.
[SQL]		• Connect an SSG to the antenna con-					jack.	Then set “SQL level”
		nector and set as:
								at the point	where
		Frequency	:	155.000 MHz
								the audio	signals
		Level	:	0.2 µV* (–121 dBm)
								just appears.
		Modulation	:	1 kHz
		Deviation	: ±1.75 kHz
		• Receiving

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

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