Icom IC-F51, IC-F50 service manual Specifications, ‘ General, ‘ Transmitter, ‘ Receiver

SECTION 1 SPECIFICATIONS

‘ GENERAL

• Frequency coverage		: 136.000–174.000 MHz
• Mode		: FM
• Type of emission		:
	VERSION				WIDE			MIDDLE			NARROW
	[USA], [GEN]			16K0F3E (25.0 kHz)						11K0F3E (12.5 kHz)
	[EUR]							14K0F3E (20.0 kHz)		8K0F3E (12.5 kHz)
• Number of conventional channels		: 128 ch, 8banks
• Antenna connector		: SMA type (50 Ω				)
• Operating temperature range		: –30 ˚C to +60˚C (–22 ˚F to +140˚F)								[USA], [GEN]
			–25 ˚C to +55˚C								[EUR]
• Power supply requirement		: 7.2 V DC nominal (negative ground)
• Current drain (at 7.2 V DC)		:
					RECEIVING				TRANSMITTING
					Stand-by		Max. audio		High (5 W)		Low (1 W)
					85 mA			300 mA	1.8 A		0.7 A
• Dimensions (projections not included)		: 56.0(W)⋅ 97.0(H)⋅ 36.4(D) mm
			27⁄32(W) ✕ 313⁄16(H) ✕ 17⁄16(D) in
• Weight (Including BP-223)		: Approximately 280 g (9.88 oz)

‘ TRANSMITTER

• Output power (at 7.2 V DC)	: High: 5 W, Low: 1 W
• Modulation	: Variable reactance frequency modulation
• Maximum permissible deviation	: ±5.0 kHz (Wide), ±4.0 kHz (Middle), ±2.5 kHz (Narrow)
• Frequency error	: ±2.5 ppm
• Spurious emissions	: 70 dB (typical)	[USA], [GEN]
	0.25 µW (≤ 1 GHz), 1.0 µW (≥ 1 GHz)	[EUR]
• Adjacent channel power	: 70 dB min. (Wide, Middle), 60 dB min. (Narrow)
• Audio harmonic distortion	: 3 % typical (AF 1kHz, 40 % deviation)
• *1Hum and Noise ([USA], [GEN] only)	: 40 dB min (46 dB typical) for Wide
(without CCITT filter)	34 dB min (40 dB typical) for Narrow
• *1Residual modulation ([EUR] only)	: 45 dB min (55 dB typical) for Wide
(with CCITT filter)	43 dB min (53 dB typical) for Middle
	40 dB min (50 dB typical) for Narrow
• Limiting charact of modulator	: 60–100 % of maximum deviation
• Microphone impedance	: 2.2 kΩ

‘ RECEIVER

• Receive system	: Double conversion superheterodyne system
• Intermediate frequencies	: 1st IF: 46.35 MHz, 2nd IF: 450 kHz
• Sensitivity	: 0.25	µV (–119 dBm) typical at 12 dB SINAD	[USA], [GEN]
	0.63	µV (–111 dBm) emf typical at 20 dB SINAD		[EUR]
• Adjacent channel selectivity	: 70 dB min (75 dB typical) for Wide and Middle
	60 dB min (65 dB typical) for Narrow
• Spurious response	: 70 dB
• Intermodulation rejection ratio	: 70 dB min (74 dB typical)		[USA], [GEN]
	65 dB min (67 dB typical)			[EUR]
• *1Hum and Noise ([USA], [GEN] only)	: 40 dB min (45 dB typical) for Wide
(without CCITT filter)	34 dB min (40 dB typical) for Narrow
• *1Hum and Noise ([EUR] only)	: 45 dB min (55 dB typical) for Wide
(with CCITT filter)	43 dB min (53 dB typical) for Middle
	40 dB min (50 dB typical) for Narrow
• Audio output power	: 0.5 W typical at 5% distortion with an 8 Ω load
• Squelch sensitivity (at threshold)	: 0.25	µV typical	[USA], [GEN]
	0.63	µV (–111 dBm) emf typical		[EUR]
• Output impedance (Audio)	: 8 Ω

Specifications are measured in accordance with EIA-152-C/204D, TIA-603 or EN 300 086.

All stated specifications are subject to change without notice or obligation. 1 - 1