Sundance SMT349 - Manual (Page 7)

Version 2.1 Page 7 of 32 SMT349 User Manual
2 Outline Description
The SMT349 is an IF/RF module, size 1 TIM offering the following features:
™ Support two antennas transmit or receive in the same frequency,
™ Two Sundance High-speed Bus (SHB) connectors,
™ Two comports,
™ Low-jitter system clock,
™ Xilinx Virtex-II FPGA (XC2V1000-4)
™ 50-Ohm analogue RF/IF inputs and outputs and external clock (option) via
MMBX (Huber and Suhner) connectors,
™ User defined pins for external connections,
™ Compatible with a wide range of Sundance modules via SHB connectors,
™ TIM standard compatible ,
™ Default FPGA firmware implementing all the functions described in this
documentation.
The technical specifications for the IF/RF part are:
™ Input signals are filtered by 1 st
IF tuned to 70MHz ± 8MHz,
™ RF output signal is in the 2.4–2.5 GHz ISM band,
™ RF input signal is in the 2.4–2.5 GHz ISM band,
™ IF output signal is 70MHz ± 8MHz,
™ The 70MHz IF is converted to a 2nd IF of 374 MHz.
3 Block Diagram
The following drawing shows the block diagram of the SMT349 module.
Each RF chain is build from 3 sub-modules:
- up-converter,
- down-converter,
- RF.