AV4 BSMS System
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4 AV4 BSMS System
4.1 Introduction
During the long time period since 1998 when the BSMS/2 mainframe was introduced into
market, several extensions, enhancements and adaptations have been carried out.
Shortly after the introduction of the AVANCE II NMR system in 2005, a wide-ranging
modernization was taking place by enabling the BSMS/2 to be operated via ethernet TCP/IP
communication and WEB based control. A major part of the classic BSMS functions was
being reworked, and the the former, up to 15 years old boards like CPU/3, LCB and the
various SCB7 and SCB13 shim current boards were replaced by new units. The successor
boards where developed based on the latest technology available, and they where therefore
higher integrated and provided better performance, higher resolution and increased stability.
The next spectrometer generation AVANCE III focused mainly on the design and the
performance of the pulse and frequency generation. On the BSMS side, the use of the new
BSMS/2 GAB/2, which provided integrated preemphasis control, became mandatory, and the
development for the replacement of the old Lock RF units L-TX, L-RX and the 19F Lock
Option was started at that time.
Latest since introduction of the AVANCE III HD generation, spectrometers have been
delivered by default with the new Lock Transceiver, combining the former L-TX and L-RX
units and providing extended Lock features such as automatic locking on multi peak solvents
and the new NMR Thermometer. In addition, the Lock Transceiver provides enough RF
power for 2H gradient shimming, and there is a dedicated 19F Lock Transceiver available for
locking on 19F solvents.
In addition, the Variable Temperature System has been integrated into the BSMS/2. With this
step the former family of BVT3000 and BVT3200 units and the former pneumatic units PNK3,
PNK3S and PNK5 as well as the SLCB/2 and SLCB/3 boards have been replaced by the new
Sensor & Pneumatics Board (SPB) and the Variable Power Supply Board (VPSB). This new
BSVT temperature control system is mandatory for operating the new iProbe type RT probes,
the heated and cooled SampleCase variants and the NMR Thermometer.
With the introduction of the AVANCE NEO NMR system, the BSMS chassis has been
redesigned. The transformer based linear power supply section has been replaced by
efficient state of the art AC/DC and DC/DC converters. The slots in the AV4 BSMS Chassis
have been unified for more flexibility. The chassis now provides enough space and power for
up to three AV4 GAB/2 and two AV4 VPSB-DC or AV4 VPSB-DC-E. The VPSB-DC-E is a
compact replacement for the former, external BVT booster models.
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General