SBX-4 Integrator Guide
Chapter 2-Integrating the SBX-4
Page 7 of 22
LED Indicators
The SBX-4 engine has two surface-mounted LED indicators located on the opposite side of the
board in relation to the header connectors. The red LED is for signaling the power-on status of
the receiver, labeled with “PWR” silk-screening. The green LED is for indicating signal acquisition,
labeled with “LOCK” silk-screening.
When power is applied to the SBX-4, the power LED illuminates and when the SBX-4 achieves
signal acquisition on a valid DGPS beacon, the lock LED illuminates.
Figure 1-4 shows the front and back of the SBX-4, including the illumination of the power and lock
LED indicators.
Figure 1-4: SBX-4, front and back