Furuno FS-2570, FS-1570 manual DSC/WATCH Keeping Receiver Digital Selective Calling

1.10	Audio Output Power	Internal speaker: 1W/ 8 ohms
		External speaker: 4W/ 4 ohms
		Handset: 2.5mW/ 150 ohms
		Line output: 0 dBm/ 600 ohms
1.11	Standard Features	Noise Blanker, Voice-activated squelch, Pre-selector

2 DSC/WATCH KEEPING RECEIVER

2.1DIGITAL SELECTIVE CALLING

2.1.1	Frequency Shift	Space: 1785.0 ± 0.5 Hz, Mark: 1615.0 ± 0.5 Hz
2.1.2	Baud Rate	100 bps ± 30 x 10-6
2.1.3	Protocol	Complies with ITU-R Rec.493-10, 541-8, 1082-1
2.1.4	Modulation	AFSK
2.1.5	Distress Alarm	3.5 s to 4.5 s self-repetition
2.1.6	Distress Alarm Memory	50 messages

2.2DSC/WATCH RECEIVER

2.2.1Frequency Range

	MF/HF specification	2187.5/ 8414.5 and 4207.5/ 6312/12577/16804.5 kHz
	MF specification	2187.5 kHz
2.2.2	Class of Emission	F1B, J2B
2.2.3	Antenna Impedance	50 ohms
2.2.4	Local Oscillator	1st: F+54,455 kHz, 2nd: 54,000 kHz, 3rd: 456.7 kHz
2.2.5	Frequency Stability	±10 Hz
2.2.6	Intermediate Frequency	1st: 54,455 kHz, 2nd: 455 kHz
2.2.7	Selectivity	-6 dB: 270 Hz to 300 Hz,
		-30 dB: within ± 380 Hz,
		-60 dB: within ± 550 Hz
2.2.8	Receiving System	Double-conversion superheterodyne
2.2.9	Radiation	within 2 nW
2.2.10	RX Error Rate	1 % or less at 1 μV input voltage
2.2.11	Spurious Response	31.6 mV non-modulated at 10μV input voltage,
		at error rate within 1%
2.2.12	Scanning Reception	max. 6 frequencies within 2 s (MF/HF)
2.2.13	Diagnosis	Transmit high frequency signal of DSC

2.3GENERAL WATCH KEEPING RECEIVER (FS-2570 ONLY, OPTION)

2.3.1	Frequency Range	1,606.5 kHz to 27.5 MHz
2.3.2	Class of Emission	J2B, F1B
2.3.3	Antenna Impedance	50 ohms
2.3.4	Local Oscillator	1st: F+54,455 kHz, 2nd: 54,000 kHz, 3rd: 456.7 kHz
2.3.5	Frequency Stability	within ±10 Hz
2.3.6	Intermediate Frequency	1st: 54,455 kHz, 2nd: 455 kHz
2.3.7	Selectivity	-6 dB: 270 Hz to 300 Hz,
		-30 dB: within ± 380 Hz,
		SP - 2	E5637S01E-M