J Plus Juni JLT622P, Руководство пользователя

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3.7 Digital block Description
JLT622P is equipped with 2 Giga Byte DDR3 SDRAM and CPU (Intel/T2200) operating at 1000MHz.
Figure 5: Digital Block Diagram
A. Modem Chip
Intel’s T2200 Wireless Base Station System on Chip (“Transcede 2200” or “T2200”) delivers the
required performance for next generation wireless networks such as Long-Term Evolution (LTE), in a
single System on Chip (SoC).
This SoC combines the latest Reduced Instruction Set Computer (RISC) processor technology with a
high-performance Digital Signal Processing (DSP) array supporting a simplified programming model.
The device offers hardware acceleration for application specific tasks, and a rich set of interfaces and
features, which allow the Transcede 2200 to provide a completely integrated solution covering the
needed processing capability from Internet Protocol (IP) (for example, S1) packets to IQ samples at
extremely low power.
B. IEEE 1588v2
IEEE 1588v2 is a standard for precision time synchronization in local area networks. It works using
exchange of special Precision Time Protocol (PTP) frames.
C. GPS
Provides timing synchronization using 1 pps signal received from GPS satellites.