Руководство Пользователя для Raymarine Ray48

16

Channels

53 US/International

Frequency Stability

±10PPM (±0.001%)
(-20°C to +50°C)

Frequency Range

156.025 to 157.425 MHz

Channel Spacing

25 KHz Increments

Power Output

25 Watts switchable to 1 Watt into 50 Ohms at
13.6 Vdc

modulation

Frequency modulated 16F3
(±4.5 KHz at 1000 Hz)

Modulation Audio Response

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)

FM Hum & Noise Level

Greater than -40 dB below audio

Audio distortion

Less than 10% at 1 KHz for ±3 KHz deviation

Spurious & harmonic Emissions

Attenuated at least 43+10 log Po (below rated
radiated carrier power) per FCC Rules Parts 2 & 80

Antenna Impedance

50 Ohms

Transmitter Protection

Shall survive open or short circuit of antenna
system without damage (10 min. test)

Channels

93 (includes 10 weather channels)

Frequency Range

156.025 to 163.275 MHz in 25 KHz increments

Frequency Stability

±10 PPM (±0.001%) from -20°C to +50°C

Usable Sensitivity

0.3µV for 12 dB (SINAD)

Squelch Sensitivity Threshold

0.2µV or better
1.0µV full squelch

Adjacent Chl Rejection

Greater than 65 dB

Spurious Image Rejection

Greater than 65 dB

Intermodulation Rejection

Greater than 65 dB

Audio Output

3 Watt or more at 10% or less distortion into 4 Ohm

load

Hum & Noise in Audio

Less than -40 dB