NorthStar Navigation VHF Marine Radio Explorer 721US User Manual
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Northstar Explorer VHF Series: 721US, 721EU Operation and Installation Manual
Channel Naming:
Yes
Tri watch, favorite channel scan:
Yes
All scan:
Yes
User programmable MMSID:
Yes (User MMSID and ATIS (721EU)
MMSID and NAME directory:
Yes - 20 numbers & group
TRANSMITTER
Frequency:
156.025 - 157.425 MHz
Output power:
25 W / 1 W selectable
Transmitter protection:
Open / short circuit of antenna
Max Freq deviation:
+/- 5 kHz
Spurious & harmonics:
better than @ 2.5 W
Modulation distortion:
Less than 4% @ 1 kHz for a +/-3 kHz deviation
RECEIVER
Frequency:
156.025 - 163.275 MHz
12 dB SINAD sensitivity:
0.25 uV (distant) / 2.5 uV (local)
Adjacent CH selectivity:
more than 70 db
Spurious response:
more than 70 db
Intermodulation rejection ratio:
more than 68 db
Residual Noise level:
more than -40 db unsquelched
Audio output power:
2 W (with 8 ohm at 10% distortion)
4 W with 4 ohm external speaker
Compass safe distance:
1.5' (0.5 m)
Specifi cations are subject to change without notice.