Mid-tech RX 400p, User Manual

Page: 41 / 151

RX 400p
3-1 98-05044
R1
3 RX 400p Architecture
The RX 400p receiver is comprised of two main components – hardware and
software. This chapter provides an overview of the hardware and software
architecture of the RX 400p receiver in order to provide further insight into the
operation of the product.
As the RX 400p receiver supports the following services, it requires receiving
capability for each:
GPS
WAAS
OmniSTAR
Beacon
3.1 Hardware
The SLX receiver inside the RX 400p drives the menu system and provides receiving
capability for GPS, WAAS, and OmniSTAR. This platform comprises the main
portion of the RX 400p receiver.
The SLX is designed to process GPS and L-band signals simultaneous, using specific
hardware and software. A built-in WAAS demodulator uses the same hardware as
the GPS receiver, as it does not require its own specific circuitry.
Onboard the SLX is an SBX beacon receiver engine that demodulates beacon signals
and communicates them to the SLX GPS through an internal serial port.
3.2 Firmware