Table of Contents
Advertisement
KC908 receives GPS signal at a relatively low sensitivity, mainly due to the
fact that the left port is not dedicated to receiving GPS signal. Thus a decent
GPS antenna should be paired for compensation.
If the working environment is a broad area on a plateau, a low-gain
passive antenna can be used as GPS antenna, whose main lobe should be
pointed to the sky. Normally, a whip antenna or a surveillance antenna at
1575MHz frequency band should be able to receive the signal.
For working environments like city, mountain areas, or somewhere with
sever blockage, it's advised to use an active antenna. Since the ports of KC908
are not equipped with bias-T, the active antenna should be powered by
external power source or battery.
2.7 Preselectors
The preselectors of the two ports are different. The left port's preselector
is simlple, while the one in the right port is complicated. The pic below shows
the composition of the preselectors.
Advertisement
Table of Contents
