59
West Marine VHF250 Radio Owner’s Manual
Speci
fi
cations (cont.)
Receiver
Items
Unit Nominal Limit
(MRN)
μ
V
0.3
0.4 max
(FRS)
μ
V
0.35
0.5 max.
(FM Broadcast)
μ
V
1.0
3.0 max.
(Air)
μ
V
1.0
30 max.
Sensitivity for 12dB SINAD
(AM Broadcast)
μ
V
1.0
2.0 max.
Squelch Sensitivity
Threshold
μ
V
0.1
0.25 max.
Tight
μ
V
0.7
2.0 max.
CTCSS/DCS Opening SINAD
(FRS)
dB
8
12 max.
Audio Freq. Response 1kHz Ref.
(MRN) @ 500Hz
dB
6
3 to 7
(MRN) @ 2000Hz
dB
-6
-9 to -5
(FRS) @ 500Hz
dB
6
3 to 7
(FRS) @ 2000Hz
dB
-6
-9 to -5
(MRN ±25kHz)
dB
72
60 min.
Adjacent Channel Selectivity
(FRS ±12.5kHz) dB
40
30 min.
IM Rejection(MRN)
dB
63
55 min.
Image and Spurious Rejection
(MRN)
dB
75
50 min.
Conducted Spurious Emission
at the antenna terminal
dBm
-65 -57 max.
(MRN)
dB
50
35 min.
(FRS) dB
37
32 min
(AM Broadcast) dB
42
32 min.
(FM Broadcast) dB
53
32 min.
Hum and Noise Ratio
(Air)
dB
42
32 min.
THD @ Standard Output Power (MRN)
%
1.2
10 max.
Audio Output Power @ 10% THD (MRN)
W
0.45
0.3 min.
Oscillator Dropout Voltage (MRN)
V
2.9
3.8 max.
Current Drain @ No Signal (MRN)
mA
72
85 max.
Current Drain @ Maximum Output (MRN)
mA
220
250 max.