Furuno IB-681 manual

	SPECIFICATIONS OF HSD MODEM UNIT
		IB-681
1. GENERAL
(1)	Tx Frequency	179.8 MHz
(2)	Rx Frequency	90.0 MHz
(3)	Channel Frequency Spacing 100 kHz
(4)	Receive Level	-60 dBm to -90 dBm
(5)	Transmit Level	-12.5 dBm
(6)	Channel Rate	132 Kbps
(7)	Modulation	O-QPSK, 50% filtered
(8)	Data Speed	56/64 Kbps, synchronous
(9)	Interface	RS-232C (Dsub25p), RS-449 (Dsub37p)
2. POWER SOURCE
(1) Rated Power		100/220 VAC (±10%): 0.3/0.2 A, 1 Phase, 50/60 Hz
3. ENVIRONMENTAL CONDITION
(1)	Temperature	-15 °C to +55 °C
(2)	Relative Humidity	93% at +40 °C
(3)	Water Resistance	IPX2
4. COATING COLOR
(1)	Cover	2.5GY5/1.5 Newtone No.5
(2)	Panel	N3.0

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