Reference Tables; Channel Descriptions And What They Mean - West Marine VHF 480 Owner's Manual

General
Power Output
Power Requirement
Modulation
Hum and Noise Signal-to-
Noise
Audio Distortion
Spurious Suppression
Output Power Stabilization
Frequency Range
Frequency Stability
Receiver
Frequency Range
Sensitivity
Circuit
Squelch Sensitivity
Spurious Response
Adjacent Channel Selectivity
Audio Output Power
Power Requirement
IF Frequencies

reFerenCe tables

#
this radio does not support ais channels.
The table below lists the display name or channel description used in the following tables

Channel descriptions and what they mean

and what each description means.
Channel name/description
DISTRESS SAFETY AND
CALLING
INTERSHIP SAFETY
34 English
1 watt or 25 watt (user selectable)
25 watts output: 6A@13.8V DC
±5 kHz deviation
45 dB@1 kHz with 3 kHz deviation with 1000 Hz
modulating frequency (nominal)
Less than 8% with 3 kHz deviation with 1000 Hz
modulating frequency
–40 dBm @ Hi, –40 dBm @ Lo
Built-in automatic level control (ALC)
156 to 158 MHz
±10 ppm @ –20°C to + 50°C
156 to 163 MHz
0.27 μV for 12 dB SINAD (nominal)
Dual Conversion Super Heterodyne PLL (Crystal for
DSC)
0.2 μV Threshold
75 dB (nominal)
70 dB @ ±25 kHz (nominal)
2.5 watts (10% Distortion, 8 Ω load)
360 mA (nominal) @ 13.8V DC at squelched, 920 mA
(nominal) @ 13.8V DC at maximum audio output
1st 41.925 MHz, 2nd 455 kHz (1st 21.7 MHz, 2nd 455
kHz for DSC)
Used for:
primarily emergency messages and distress calls
safety messages from one ship to another, or from a
ship to Coast Guard aircraft