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5-3
Maintenance
5.2 Preventative Maintenance
The RAY215 has been constructed to be virtually maintenance free. Your
attention to a few basic points should assure many years of service.
1. Although the unit is waterproof, always keep the unit as dry as possible.
2. Clean the exterior of the unit with a tissue or soft non-abrasive cloth.
CAUTION
Do not use solvents or other chemicals for cleaning this equipment.
3. Inspect the radio case and antenna for any physical damage.
5.3 Specifications
5.3.1 Transmitter
Channels All available US, International and Canada VHF
Marine band
Frequency Stability +/- 10PPM (+/- 0.001%)
(-20 °C to +50 °C)
Frequency Range 156.025 to 157.425MHz
Channel Spacing 25 kHz Increments
Power Output 25 Watts switchable to 1 Watt into 50 Ohms at
13.6 VDC
Modulation Frequency modulated 16F3
Modulation Audio Response
Shall not vary +1/-3 dB from true 6 dB pre-
emphasis from 300 to 2500Hz, reference 1000Hz.
Audio frequencies 3-20 kHz shall be attenuated
(at 1 kHz by 60 log f/3 dB. Above 20kHz by 50dB)
FM Hum & Noise level
Less than -40dB below audio
Audio Distortion Less than 10% at 1kHz for 3kHz deviation
Spurious & Harmonic Attenuated at least 43+10log Po (below rated
radiated carrier Emissions power) per FCC Rules
Part 2 & 80
Antenna Impedance 50 Ohm
Transmitter Protection Open and short antenna protection circuit for 10
minute transmission