CSI Wireless SBX-3, Reference Manual

Page: 48 / 110

SBX-3 Reference Manual
30
Figure 3-1 SBX-3, Front and Back
3.2 SBX-3 Block Diagram
The SBX-3 accepts an analog input signal between 283.5 kHz to 325
kHz from an antenna into its front-end where it is filtered, mixed, and
converted to a digital output. The Digital Signal Processor (DSP)
demodulates GPS correction information from the digital stream. The
output of the SBX-3 is RTCM SC-104 DGPS correction data at a 5V
HCMOS interface level. Figure 3-2 illustrates this process.