Specifications; Transmitter; Receiver - Raymarine Ray48 Owner's Handbook Manual

4.4 SPECIFICATIONS

4.4.1 Transmitter

Channels
Frequency Stability
Frequency Range
Channel Spacing
Power Output
modulation
Modulation Audio Response
FM Hum & Noise Level
Audio distortion
Spurious & harmonic Emissions
Antenna Impedance
Transmitter Protection

4.4.2 Receiver

Channels
Frequency Range
Frequency Stability
Usable Sensitivity
Squelch Sensitivity Threshold
Adjacent Chl Rejection
Spurious Image Rejection
Intermodulation Rejection
Audio Output
Hum & Noise in Audio
53 US/International
±10PPM (±0.001%)
(-20°C to +50°C)
156.025 to 157.425 MHz
25 KHz Increments
25 Watts switchable to 1 Watt into 50 Ohms at
13.6 Vdc
Frequency modulated 16F3
(±4.5 KHz at 1000 Hz)
Shall not vary +1/-3 dB from true 6 dB pre-emphasis
from 300 to 2500 Hz, reference 1000 Hz. Audio
frequences 3-20 KHz shall be attenuated (at 1KHz by
60 log f/3 dB. Above 20 KHz by 50 dB)
Greater than -40 dB below audio
Less than 10% at 1 KHz for ±3 KHz deviation
Attenuated at least 43+10 log Po (below rated
radiated carrier power) per FCC Rules Parts 2 & 80
50 Ohms
Shall survive open or short circuit of antenna
system without damage (10 min. test)
93 (includes 10 weather channels)
156.025 to 163.275 MHz in 25 KHz increments
±10 PPM (±0.001%) from -20°C to +50°C
0.3µV for 12 dB (SINAD)
0.2µV or better
1.0µV full squelch
Greater than 65 dB
Greater than 65 dB
Greater than 65 dB
3 Watt or more at 10% or less distortion into 4 Ohm
load
Less than -40 dB
16