VHF Marine Radio

M304 Specifications GENERAL Frequency Range Transmit: 156.025-157.425 MHz Receive: 156.050-163.275 MHz Usable channels USA, CAN, INT, WX channels Type of emission 16K0G3E, 16K0G2B Power supply 13.8V DC ± 15% Current drain ( at 13.8V DC) Tx 5.5 A ( at 25W output) Rx 1.5 A ( at AF max.) Operating temperature range -20° C to + 60° C; -4° F to + 140° F Antenna impedance 50© ( SO-239) Dimensions ( WxHxD, projections not included) 153x67x133mm, 61/ 32x25/ 8 x 51/ 4 inches Weight ( approx.) 825g; 1.8lb NMEA formats Version 2.0 or 3.01, RMC; GGA, GNS, GLL TRANSMITTER Output power 25 W or 1 W ( at 13V DC) Modulation system Variable reactance frequency modulation Max. freq. deviation ± 5 kHz Frequency error ± 10 ppm Spurious emissions Less than -70 dBc ( at 25W) Adj. channel power More than 70 dB Audio harmonic distortion Less than 10% ( at 60% dev) Residual modulation More than 40 dB RECEIVER Intermediate freq. 1st 21.7 MHz, 2nd 450 kHz Sensitivity 0.22¼ V typical at 12dB SINAD Squelch sensitivity Less than 0.22¼ V Adj. Ch. selectivity More than 70dB Spurious response More than 70dB Intermodulation More than 70dB Hum and noise More than 40dB Audio output power 4.5 W typical at 10% distortion with a 4© load