Icom IC-F3GS service manual Sensitivity, Squelch, Level, Sql

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 frequency: 146.000 MHz		Top	Connect a SINAD meter with an	Minimum distortion
SENSITIVITY		• Connect a standard signal generator to		panel	8Ω load to the [SP] jack.	level
[BPF T1] –		the antenna connector and set as:
[BPF T4]		Frequency	: 146.000 MHz
		Level	: 3.2 µV* (–97 dBm)
		Modulation	: 1 kHz
		Deviation	: ±3.5 kHz (W-type)
			±1.75 kHz (N-type)
		• Receiving

CONVENIENT: The BPF T1–BPF T4 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 T4 to peak levels. or

w-1: Set the cursol to one of BPF T1, T2, T3, or T4 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 frequency: 146.000 MHz		Top	Connect a SINAD meter with an	12 dB SINAD
LEVEL		• Connect a standard signal generator to		panel	8Ω load to the [SP] jack.
[SQL]		the antenna connector and set as:
		Frequency	: 146.000 MHz
		Level	: OFF
		Modulation	: 1 kHz
		Deviation	: ±3.5 kHz (W-type)
			±1.75 kHz (N-type)
		• Receiving
	2	• Receiving				At the point where
						the audio signals
						just appears.

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

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