LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794
Production Information
Design-in
Page 53 of 85
2.6.9
External active antenna control (MAX-6)
ANTON Signal can be used to turn on and off an external LNA. This reduces power consumption in Power
Save Mode (Backup mode).
Figure 54: External active antenna control (MAX-6)
References
Value
Tolerance
Description
Remarks / Manufacturer
R1
10
5%
Resistor, min 0.25 W
R2
100 k
5%
Resistor
T1
Si1040X
Power MOSFET
Vishay
L1
LQG15HS27NJ02
Inductor
muRata
C1
X5R 1N 10V
10%
Decoupling Capacitor
muRata
Table 25: Active antenna control, bill of material
2.6.10
GPS antenna placement for LEA-6R
For an optimum ADR navigation performance, the following setup recommendations should be considered.
GPS antenna placement, gyro placement and single tick origin
Due to geometric and dynamic aspects of driving vehicles, it is important to correctly place the GPS antenna and
the external sensors - from a geometric point of view - in order to get consistent measurement information from
the different sensors.
For standard road vehicles: The GPS antenna should be placed above the middle of the rear (unsteered) axis. The
gyro can be placed anywhere on the vehicle. Single ticks should origin from the rear (unsteered) wheels. For
articulated busses, the sensors should be placed on the front car as if this was a standard road vehicle. In case
the GWT solution is used for rail vehicles: The GPS antenna should be placed in the middle of a wagon, while
the gyro can be placed anywhere on the same wagon and the single ticks can origin from any wheels of the
same wagon.
Large geometrical deviations from the optimal placement - especially of the GPS antenna (e.g.
when placing it above the front axis of a long bus) - can result in significant performance
degradation!
