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4-4 Maintenance
4.3.2 Receiver
Channels All available US, International, and Canadian VHF
Marine Band
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 0.25 µV for 12 dB (SINAD)
Squelch Sensitivity 0.2 µV or better
Threshold 1.0 µ full squelch
Adjacent CH Rejection
70 dB
Spurious Image Rejection 70 dB
Intermodulation Rejection 70 dB
Audio Output 3.5 watts or more at 10% or less distortion into 4
ohm load (internal)
Hum & Noise in Audio Less than -40 dB
4.3.3 Operating Requirements
Input Voltage 13.6 VDC +/- 15% (11.6 to 15.6 VDC)
Current Required Less than 6 amps at 25 watts
Transmit Less than 2 amps at 1 watt
Temperature Range -4°F to +122°F (-20°C to +50°C)
Duty Cycle Continuous, 80% receive, 20% transmit (max 10
min, @25°C)
Relative Humidity 80%
Water Protection To CFR-46 for Base Station and External Speaker.
To JIS-7 for Full Function Handset (submersible
to 1m for at least 30 minutes)
4.3.4 Radio Dimensions
Base Station Transceiver
Height 2.63 inches (67 mm)
Width 8.98 inches (228 mm)
Depth 7.04 inches (179 mm)
Weight Approx. 4 lbs (1.87 kg)