Installation Instructions
GPS25 Series
SW3-1035 - v1
1. Introduction
The GPS25 antenna series is a range of high-performance L1/L2/L5 band GPS/GNSS antennas with ~37dB gain LNA and excellent filtering. The antenna
module is housed within a low profile, robust enclosure and is suitable for use with GPS, GLONASS, Galileo and BeiDou systems requiring high accuracy
for navigation, RTK and other precision applications.
The antenna is available in panel mount (GPS25P) and magnetic / adhesive mount (GPS25MS) variants. The GPS25P can be installed on a metal or
plastic panel. The GPS25MS can be attached by magnetic adhesion on a ferromagnetic panel. For other mounting surface materials, the adhesive pad
can be used.
The antenna is supplied with integral flame retardant RG174 cable (compliant to UN ECE R118), and is suitable for many installation environments.
Electrical Safety Note
The product contains an active GPS antenna (part number SR8-HGL2537S). Rated voltage: 3-12VDC Rated current: 35mA maximum.
The supply to this device must be provided with overcurrent protection of 1A maximum.
2. Mounting requirements and selecting location
The antenna should be mounted with a clear view of the sky for optimal satellite acquisition.
If utilising the adhesive pad it is recommended that the installation is carried out when the temperature is higher than 50°F (10°C) - the ideal temperature for
the pad bonding is in the range of 70°F (21°C) to 100°F (37°C).
For the panel mount version, ensure that there is adequate under panel clearance and that there is no double skin panel or cross brace present.
Measure to check for central position if applicable.
For optimal performance the antenna should, if possible, be mounted at least 300mm (1ft) away from other conductive objects on the mounting panel.
3. Panel Mounting
Mask panel area around hole position to protect paintwork and headliner. Drill a pilot hole, and then increase to 19mm
(3/4”), ensuring that drill/ cutter bit does not contact headliner. Clean area around the hole, carefully removing all swarf.
Apply some petroleum jelly or paint around the hole to prevent corrosion if necessary.
Remove protective backing from underside of antenna and feed coaxial cable through panel. Position the antenna over the
hole and stick to panel by applying firm downward pressure. Assemble washer & nut from underside and tighten.
IMPORTANT:
Do not exceed a torque of 5Nm (3.6ft/lbs) when tightening the mounting nut.
Hole
∅
19
4. Adhesive Mounting
Make sure that the selected mounting surface is clean and dry. De-grease suface with 70% isopropyl alcohol (allowing time to dry) if required. Remove
protective backing from supplied adhesive pad and adhere to underside of antenna, position the antenna over desired location, remove remaining
protective backing and stick to panel by applying firm downward pressure.
