User's Manual

5 Setting up the Receiver
46 SPSx80 and SPSx81 Smart GPS Antennas User Guide
Figure 5.3 Tripod and tribrach setup
Fixed height tripod setup
A fixed height tripod setup is similar to a tripod setup, but is simplified by the central
leg of the tripod, that is placed directly on the control point. If the central leg is leveled
accurately, the fixed height tripod is quick and easy to set up, and provides an accurate
way to measure the true antenna height.
1. Set up the tripod over the control point.
2. Attach the GPS antenna to the head of the tripod.
3. If using an external high-gain radio antenna, mount the radio antenna to the
radio antenna bracket that is attached to the head of the tripod (beneath the
GPS antenna). See
Figure 5.4
.
4. If using the SPSx50 or SPSx51 Modular GPS receiver , hook the receiver to the
center leg of the tripod, using the tripod clip.
5. If using the SPSx80 or SPSx81 Smart GPS antenna, you can mount the antenna
using the 25 cm spacer rod (supplied with the SPSx80 or SPSx81 Base Station
Accessory kit) so that the radio antenna clears the head of the tripod.
SPSx80 with an internal 450 MHz
TX radio
SPSx50 with an external
high-gain antenna
SPSx50 with a low-gain “rubber
duck” antenna