V102 GPS Compass User Guide
7
V102 Environmental Considerations
The V102 is designed to withstand harsh environmental conditions;
however, adhere to the following limits when storing and using the V102:
•
Operating temperature: -30°C to +70°C (-22°F to +158°F)
•
Storage temperature: -40°C to +85°C (-40°F to +185°F)
•
Humidity: 100% non-condensing
VHF Interference
VHF interference from such devices as cellular phones and radio
transmitters may interfere with GPS operation. For example, if installing the
V102 near marine radios consider the following:
•
VHF marine radio working frequencies (Channels 1 to 28 and 84 to
88) range from 156.05 to 157.40 MHz. The L1 GPS working center
frequency is 1575.42 MHz. The bandwidth is +/- 2MHz to +/- 10 MHz,
which is dependent on the GPS antenna and receiver design.
•
VHF marine radios emit strong harmonics. The 10th harmonic of
VHF radio, in some channels, falls into the GPS working frequency
band, which may cause the SNR of GPS to degrade significantly.
•
The radiated harmonic signal strength of different brands/models
varies.
•
Follow VHF radio manufacturers’ recommendations on how to
mount their radios and what devices to keep a safe distance away.
•
Handheld 5W VHF radios may not provide suitable filtering and may
interfere with the V102’s operation if too close.
Содержание V102 G
Страница 1: ...V102 GPS Compass User Guide Part No 875 0276 000 Rev C1 ...
Страница 6: ...Chapter 1 Introduction Overview Parts List ...
Страница 9: ......
Страница 32: ...Chapter 3 Operation GPS Overview V102 Overview Common Commands and Messages ...
Страница 46: ...Appendix A Troubleshooting ...
Страница 50: ...Appendix B Specifications ...
Страница 60: ...www hemispheregps com ...