Installation Instructions – SW3-606
GPSB Series
Introduction
A.
The GPSB series is a high performance combination quad function
antenna in an OEM style shark fin housing. The antenna has an active
GPS antenna with a 26dB gain LNA suitable for 3 to 5 volt supply via
the GPS coax cable.The GPSB is suitable for fitment to standard vehicle
panels of up to 4mm (0.16”) thickness.
Heat shrink tubes are included in the kit, to enable the coaxial connections
to be sealed as an extra precaution if required.
SW3-606 - Document Version 1.2
Mounting requirements and selecting location
B.
This antenna must be fitted on a conductive ground plane of minimum ½ wavelength diameter at the lowest frequency of
operation; to calculate see below:
150 / frequency in MHz = ½ wavelength (m)
Examples: 150MHz =100cm (39.4”); 400MHz = 38cm (15”); 900MHz =16cms (6.3”).
When fitting on a non-metallic panel, a ground plane plate of suitable size should be fabricated and fitted under the mounting
panel; the securing washer and nut must make a low resistance electrical contact with this plate (< 0.2Ω). Select a mounting
location, checking for roof curvature to ensure that the antenna base will have a flat mounting surface. The antenna should
be located as far as possible from surrounding roof mounted items (e.g light bar, air con unit). 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.
Prepare and drill hole
C.
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.
Remove paint and primer from under panel surface to ensure adequate earth contact
by washer and nut. Apply some petroleum jelly or paint around the hole to prevent
corrosion.
Hole
∅
19
Fitting the antenna
D.
Remove protective backing from underside of antenna, feed coaxial cable(s) through panel. Position the antenna over the
hole ensuring correct orientation and stick to panel by applying firm downward pressure. Assemble washer and nut from
underside and tighten - recommended torque is 5Nm (3.7ft/lbs). Remove blanking cap and screw comms antenna whip
securely to mounting stud (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 these devices must be provided with overcurrent protection of 1A maximum.
