User Manual

TVG-850 - Installation Instructions
Trimble Mobile Resource Management Jun 16, 2010 Revision 02 9
9. ANTENNA INSTALLATION
9.1. INSTALLATION GUIDELINES
The standard Multi-band surface mount antenna is supplied with two cables, one for GPS and the other
for the wireless modem. There is a Wi-Fi option available which uses a third cable for the 2.4GHz range.
Each cable is 15” (4.5m) long and equipped with separate, unique connectors to assure that each
antenna cables is properly connected to the TVG-850. The Cable connector scheme follows:
 The wireless modem antenna cable (RF-195) has a FAKRA D (Violet) connector.
 The Wi-Fi modem antenna cable uses a FAKRA A (Black) connector.
 The GPS antenna cable (RG-174) has a FAKRA C (Blue) connector.
 The optional Bluetooth antenna if equipped uses RG-174 cable with a FAKRA A (Black)
connector.
NOTE: The Quad-band surface mount antenna is ground plane dependent and therefore should be
mounted on a metal surface. If a metal surface is not available, the antenna may be mounted on a
fiberglass surface provided an appropriate ground plane is used. Trimble has a 6” diameter ground plane
disc (p/n 55399) for fiberglass surfaces. This item must be ordered separately.
9.2. CHOOSING A LOCATION FOR THE ANTENNA
When choosing a location for the Quad-band antenna, make sure that:
 the antenna will be mounted on a flat surface metal surface (i.e. roof)
 The surface is clean enough to ensure proper sealing. All dust that settles on it must be removed
 Antenna must have an unobstructed view of the sky and as much of the horizon as possible
 If the antenna must be located in the vicinity of other antennas (radio, etc), locate the Tri-band
antenna at least 46cm (approximately 18 in.) away from the other antennas.
Note: The antenna cannot be located directly above or beside any device (i.e. 2-Way Radio, CB
Radio mounted in headliner console) that might cause frequency interference.
 Avoid areas of high vibration such as engine hoods.
 The chosen location provides access both above and below the antenna-mounting surface. This
access is required to secure the antenna mounting and for routing the antenna cable.
 Before drilling, make sure the combined length of the antenna cable and extension cable will
reach the GPS receiver from the intended antenna mounting location.
 Drill a ¾” hole at the mounting location.