Mounting recommendations: Difference between revisions
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very low impedance point on-board vehicle network. These points in the car | very low impedance point on-board vehicle network. These points in the car | ||
are the battery terminals. Therefore, we recommend connecting the power of | are the battery terminals. Therefore, we recommend connecting the power of | ||
FMB640 (wire GND and POWER) directly to the battery terminals. Another valid | |||
option is to connect the wires to the main POWER cable inside the fuse box (if | option is to connect the wires to the main POWER cable inside the fuse box (if | ||
there is none, then to the power supply where the fuses of vehicle’s computer | there is none, then to the power supply where the fuses of vehicle’s computer | ||
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vehicle computer. Connecting the GND at an arbitrary point to the mass of the | vehicle computer. Connecting the GND at an arbitrary point to the mass of the | ||
car is unacceptable, as static and dynamic potentials on the line GND will be | car is unacceptable, as static and dynamic potentials on the line GND will be | ||
unpredictable, which can lead to unstable | unpredictable, which can lead to unstable FMB640 and even its failure.</nowiki><br /><br />'' | ||
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• Avoid GNSS antenna placement under metal surfaces.<br /> | • Avoid GNSS antenna placement under metal surfaces.<br /> | ||
• Avoid placing | • Avoid placing FMB640 device near car radio, speakers or alarm systems.<br /> | ||
• GNSS antenna must be placed so its state is as horizontal as possible (if antenna is leant | • GNSS antenna must be placed so its state is as horizontal as possible (if antenna is leant | ||
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• SIM card should be inserted in the module while the connector is plugged off (while | • SIM card should be inserted in the module while the connector is plugged off (while | ||
module has no power).<br /> | module has no power).<br /> | ||
[[Category: | [[Category:FMB640 Manual]] | ||