Icom IC-910H service manual Receiver

■ RECEIVER

• Receive system	:
VHF	SSB, CW			Single conversion superheterodyne
	FM			Double conversion superheterodyne
UHF	SSB, CW			Double conversion superheterodyne
	FM			Triple conversion superheterodyne
• Intermediate frequencies	:										(Unit: MHz)
					MAIN BAND				SUB BAND
				1st		2nd	3rd	1st		2nd		3rd
			SSB	10.8500		—	—	10.9500		—		—
		144 MHz	CW	10.8491		—	—	10.9491		—		—
			FM	10.8500		0.455	—	10.9500		0.455		—
			SSB	71.2500		10.8500	—	71.3500		10.9500		—
		430 (440) MHz	CW	71.2491		10.8491	—	71.3491		10.9491		—
			FM	71.2500		10.8500	0.455	71.3500		10.9500		0.455
			SSB	243.9500		10.8500	—	243.9500		10.9500		—
		1200 MHz	CW	243.9491		10.8491	—	243.9491		10.9491		—
			FM	243.9500		10.8500	0.455	243.9500		10.9500		0.455
• Sensitivity	: SSB, CW (10 dB S/N)			Less than 0.11 µV
	FM (12 dB SINAD)			Less than 0.18 µV
• Squelch sensitivity	: SSB, CW			Less than 1.0 µV
(threshold)	FM			Less than 0.18 µV
• Selectivity	: SSB, CW			More than 2.3 kHz/–6 dB
				Less than 4.2 kHz/–60 dB*
	FM			More than 15.0 kHz/–6 dB
				Less than 30.0 kHz/–60 dB*
	FM-N			More than 6.0 kHz/–6 dB
				Less than 18.0 kHz/–36 dB
	CW-N			More than 0.5 kHz/–6 dB
	(w/FL-132 or FL-133)			Less than 1.34 kHz/–60 dB*
				*Except 1200 MHz band
• Spurious and image rejection ratio:
	144/430 (440) MHz			More than 60 dB
	1200 MHz			More than 50 dB

•AF output power (at 13.8 V DC):

More than 2.0 W at 10% distortion with an 8 Ω load

• RIT variable range	: 144/430 (440) MHz	±1.0 kHz (SSB, CW)
		±5.0 kHz (FM)
	1200 MHz	±2.0 kHz (SSB, CW)
		±10.0 kHz (FM)
• IF SHIFT variable range	: More than ±1.2 kHz
• PHONES connector	: 3-conductor 6.35(d) mm (1⁄4″)
• Ext. SP connectors	: 2-conductor 3.5 (d) mm (1⁄8″) /8 Ω ⋅ 2 (for MAIN and SUB)

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