Icom IC F110S, IC F111S, IC F121S service manual Operating freq 400.000 MHz L

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. :		400.000	MHz [L]		MAIN	Connect a SINAD meter with a	Minimum distortion
SENSITIVITY				440.000	MHz [H]			4 Ω load to the external [SP]	level
[BPF T1],		• IF bandwidth	: Wide					jack.
[BPF T2]		• Connect a standard signal generator to
		the antenna connector and set as:
		Frequency	:	440.000	MHz [L]
				440.000	MHz [H]
		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. :		415.000	MHz [L]		Rear	Connect a SINAD meter with a	Set “SQL level” to
LEVEL				465.000	MHz [H]		panel	4 Ω load to the external [SP]	close squelch.
[SQL]		• IF bandwidth	: Narrow					jack.	Then set “SQL level”
		• Connect an SSG to the antenna con-
									at the point	where
		nector and set as:
									the audio	signals
		Frequency	:	415.000	MHz [L]
									just appears.
				465.000	MHz [H]
		Level	:	0.2 µV* (–121 dBm)
		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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