L-TRX/L-19F
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11 L-TRX/L-19F
11.1 Introduction
The BSMS/2 Lock Transceiver (L-TRX) and the optional BSMS/2 Lock Transceiver 19F
(L-19F) are highly integrated units and incorporate the following functions:
• Lock RF signal generator and transmitter.
• Lock RF receiver.
• Actively gated 5W pulsed power amplifier for 2H gradient shimming purposes.
• 19F Lock option.
In addition, the L-TRX / L-19F have several new features:
• Enhanced digital transmitter and receiver.
• Power amplifier with active quiescent current control.
• Field-upgradable by firmware.
• Fast SSRB interface to ELCB.
• Real-time pulses also accessible via backplane connector.
• On board over temperature protection.
• Extended internal diagnostics.
• BIS hardware identification system.
• Milled housing with narrow form factor and optimized cooling fins.
• Dedicated up- and down converter unit for fluorine lock (L-19F).
There is one frequency selective L-TRX unit available per system frequency. The L-19F unit
is a broadband design that covers the system frequency range from 300 MHz to 1000 MHz.
11.2 System Architecture / Overview
Figure11.1: L-TRX Block Diagram
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