AV4 BSMS System
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Figure4.1: AV4 BSMS Chassis with 3-Axis Gradient for AVANCE NEO
4.1.1 Subunits in the AV4 BSMS
Shim
The SCB20 (Shim Current Board) provides the required precision for all existing types of
shim systems and can therefore replace any variant of former SCB7 and SCB13.
Connectivity to the different Shim Systems is provided by a set of various adapters. For
BOSS1 Shim Systems, one SCB20 is sufficient, whereas two SCB20 cover the whole range
of currently available Shim Systems, including BOSS1 (the connector of the left hand side
SCB20 remains open in that case).
Lock
The ELCB (Ethernet based Lock Control Board) incorporates the lock functions like the lock
control algorithm and the H0 current source. In addition, this ELCB acts as communication
gateway between the workstation and the various subunits inside of the BSMS. The BSMS
can be directly accessed with a standard Internet browser via HTTP protocol or allows
hardware independent communication with TopSpin 2.0 and higher by using a CORBA
interface.
The highly integrated Lock RF unit L-TRX provides a direct digital RF transmitter and receiver
and includes all what is necessary to allow gradient shimming on 2H. For locking on 19F
solvents, there is a separate 19F Lock Transceiver available. The L-TRX is frequency
specific, whereas the 19F Lock Transceiver covers a wide frequency range.
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General