Furuno FS-1503 manual Antenna Coupler

ANTENNA COUPLER

Power Capability	150 W pep
Tuning System	CPU controlled fully automatic tuning system
Frequency Range	1.6 to 27.5 MHz
Input Impedance	50 ohms (viewed from transceiver)
Antenna Required	6 to 15 meters wire or whip
Tuning Power	10 to 20 W pep
VSWR	Less than 1.5
Tuning Time	Within 2 to 15 seconds, Within 0.5 seconds for an ever tuned
	frequency
Dummy Load (option)	10 ohms + 250 pF for check of Two-tone alarm generator at
	2191 kHz (frequency changeable)
Power Requirement	12.0 VDC, 0.6 A (supplied from transceiver)
Construction	Waterproof plastic cabinet, stainless steel mount

RECEIVER

Receiving System	Double-conversion superheterodyne
	IF: 54.455 MHz and 455 kHz.
Sensitivity	Input level to produce SINAD 20 dB
		J3E	J2B
	1.6 - 4 MHz	Below +16 dBμV	Below +6 dBμV across 10 Ω + 250 pF
	4-27.5 MHz	Below +3 dBμV	Below -7 dBμV across 50 Ω
Pass Band	350 - 2700 Hz -6 dB
Cross Modulation	Unwanted signal +90 dBμV ±20 kHz from +60 dBμV wanted
	signal
Audio Output	1 W (8 Ω internal loudspeaker), 3.5 W (4Ω optional external
	loudspeaker)
	0 dBm/600Ω line output (for NBDP, DSC, RB-500)
Other Features	RF Gain:	Adjustable
	Squelch:	ON/OFF, Activated by voice/signal strength
	Dimmer:	OFF/Low/Medium/High
	Loudspeaker: ON/OFF (Handset always alive)
	AGC:	ON/OFF
	Noise blanker: ON/OFF (thru system setting)

SP-2