SBX-3 Reference Manual
27
2.7 Antenna Output Voltage
Jumper JP1 of the Evaluation Module allows you to select whether the
output voltage to the external antenna is +5 VDC or +10 VDC (See
Figures 2-5 and 2-6). The CSI Wireless MBA-3 and MBA-3A whip
antennas require an input voltage between 10 and 13 VDC, while the
MBL-3 loop and MGL-3 combination antenna can operate with a voltage
input between 4.9 and 13 VDC.
The default output voltage setting
of the SBX-3 Evaluation Module is 10 VDC
.
+10V
+5V
+10V
+5V
10 VDC Antenna
Output
5 VDC Antenna
Output
JP1
JP1
Antenna Power
Antenna Power
Figure 2-6 Evaluation Module Antenna Output Voltage
2.8 SBX-3 Evaluation Module-S Splitter
Option
The SBX-3 Evaluation Module-S includes an optional Internal Signal
Splitter designed for use with the MGL-3 and MGW-1 antennas. The
Internal Signal Splitter separates the GPS and beacon signals output by
these combination antennas. The beacon portion of the combined
signal is supplied to the internal beacon receiver while the GPS signal
is redirected to an external GPS receiver through the TNC-S connector
labeled ‘GPS’ located on the rear panel (see Figure 2-7). This feature
eliminates the need for a separate GPS antenna or an external splitter
box, reducing the amount of cable required for an installation and
evaluation.
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