GF-8801, GF-8802, GF-8803
Hardware Specifications
SE19-410-006-00
26
20 Special Attention
20.1 Precautions for Use
(1) A GNSS receiver receives very weak signals broadcasted by the GNSS satellites. Using an antenna with
band limitations or insufficient pre-amplifier could be disrupted by transmitted power from TV broadcast,
mobile phone, MCA or similar transmitting devices causing unstable reception status. Therefore use an
antenna equipped with a SAW filter on the pre-amplifier front stage to ensure stable GNSS reception.
(2) Radio waves transmitted by handheld transmitters or transmitting antennas may adversely affect GNSS
signal reception by superimposing interfering signal onto the GNSS antenna. When locating the GNSS
antenna ensure is not located in the direction of offending transmitting antenna beam.
(3) RF noise may interfere via the GNSS antenna and adversely affect the GNSS signal reception. Avoid
using GNSS devices near equipment emitting RF noise.
(4) Considering the information above check tracking status of the GNSS satellites and positioning
information. Possibly for an extended period of time (8 to 24 hours) to ensure no multipath signal or other
reception issues exist. Also check the overall environment where the GNSS antenna will be located.
(5) Ensure a stable power supply connection.
(6) Install in a stable temperature, wind free environment for the GNSS unit to eliminate errors caused by
temperature deviations.
(7) GF-8802 and GF-8803 use an oven-controlled crystal oscillator (OCXO) which controls to maintain the
temperature constant. Therefore, since the temperature near the product may exceed 85°C, pay attention
to the heat resistance of parts when using.
(8) Lightning may strike the GNSS antenna. This product does not have a lightning protector so we
recommend inserting an appropriate arrester between the GNSS antenna and this product.
20.2 Electronic Component
Components in this product are planned to be purchased from multiple manufacturers / vendors according to
FURUNO’s procurement policy. Therefore, multiple components from multiple manufacturers / vendors may
be used even in the same production lot.
20.3 Precautions at Mounting
(1) This product contains semiconductor inside. While handling this, be careful about the static electrical
charge (less than 100V). To avoid it, use conductive mat, ground wristband, anti-static shoes, ionizer, etc.
as may be necessary.
(2) Avoid mechanical shock and vibration. Do not drop this product.