Installation Instructions
SW3-570 - v3
1. Introduction
The GPS(G)P antenna and GPSK combi antenna bases incorporate an active GPS/GNSS antenna module with 26dB gain LNA, which supports GPS,
GLONASS, Galileo and BeiDou in L1 Band.
As supplied, the base can be mounted on panels up to 6mm thick in a single 15mm hole.
An extender kit is available as an option for use when fitting to a thick mounting panel.
2. Mounting Requirements and Selecting Location
The antenna must be fitted on a conductive ground plane of adequate size. For GPS/GNSS only, the recommended size is 10cm (3.9”) diameter. For GPSK
type, the target* ground plane size required will be dictated by the lowest frequency used by the comms whip. This is based on a half wave diameter, and
can be calculated by 150/Freq. (MHz). Examples for common applications are shown below.
Diameter for: 150MHz = 1m (3.3’); 400MHz (TETRA) = 38cm (1.4’); 800MHz (GSM) = 19cm (7.5”)
3. Making the Hole and Fitting the Antenna
Mask the chosen location to avoid damage to surrounding panel area, drill a pilot hole, then increase to 15mm (0.6"). Deburr the hole and apply protective
primer to the cut metal to prevent corrosion. Remove any paint or primer from the underside around the hole, to enable a low resistance contact for the nut
and washer.
Remove the protective backing from the underside of the antenna, feed the coaxial cable(s) through panel. Position the antenna over the hole ensuring
correct orientation and stick to panel by applying firm downward pressure. Assemble the nut and washer from underside and tighten to 4Nm.
When fitting the antenna to a non-metallic panel, a ground plane plate of suitable size should be
fabricated and fitted to the underside of the mounting panel. The securing washer and nut must make
a low resistance electrical contact with the metal panel or ground plane plate (less than 0.2 ohm).
Select a mounting location to 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.
Electrical Safety Note
This product contains an active GPS/GNSS antenna (part number SR8-HG26-04FJ). Rated voltage: 3-5VDC Rated current: 20mA maximum
The supply to this device must be provided with overcurrent protection of 1A maximum.
GPS[G]P & GPSK Series
*Target refers to achieving the recommended size or as close as possible for optimum performance.
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