SCB20
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9
SCB20
9.1
Introduction
The SCB20 (Shim Control Board) is the unified and highly integrated Shim Current Source.
One single SCB20 can drive a BOSS1 configuration and two SCB20 are required for all other
Shim Systems e.g. BOSS3.
There is exactly one standard version of SCB20, which provides the necessary performance
and precision for all possible variants of connected Shim Systems.
Low level hardware functions are implemented directly on the SCB20, whereas higher level
functions such as BOSS file handling, Auto Shim and RCB Shim are provided by the
Software running on the ELCB.
It is possible to store a complete BOSS file on the nonvolatile memory of the ELCB. For
BOSS1 Shim Systems there is a predefined BOSS matrix, which does not need to be
downloaded.
The current sources of the SCB20 are unified - each current source provides a current
ranging from -1 Ampere (-130‘000 current units) to +1 Ampere (+130‘000 current units).
Since exchanging of Shim settings with the TopSpin application (command
rsh
and
wsh
) is
based on currents, it is not possible to transfer the former SCB7/13 Shim settings directly to
the new SCB20 boards. It is however possible to enter manually all shims values (Z1, Z2, ...)
that are also stored in the TopSpin shim files.
9.2
Technical Data
Parameter
Min.
Type
Max
Unit
Notes
Output Current (continuous)
-1.0
+1.0
A
Current Value, Resolution and
Step Size
20
2
Bit
µA
Maximum Offset
+/- 20
µA
Gain Error
0.5
%
1)
Maximum Offset Drift
+/- 1
µA / °C
Gain Drift
< 11
ppm / °C
Tolerated range of connected
Shim Coil resistance
0
15
Ohm
Required power supply voltage
|VCC| and |VEE|
20
26
V
Sum of all shim currents
(sum of absolute values)
6
A
2)
Small Step Response time
(Transition from -100 to 100 mA)
20
ms
3)
Large Step Response time
(Transition from -1 to 1 A)
160
ms
3)
Summary of Contents for NMR AV4 BSMS System
Page 1: ...BSMS System for AVANCE NEO User Manual Version 001 Innovation with Integrity NMR...
Page 10: ...Contents x H172203_1_001...
Page 22: ...Safety 22 234 H172203_1_001...
Page 26: ...Transport Packaging and Storage 26 234 H172203_1_001...
Page 42: ...Chassis Mainframe 42 234 H172203_1_001...
Page 46: ...Fan Tray 46 234 H172203_1_001...
Page 55: ...ELCB H172203_1_001 55 234 Figure 8 1 ELCB Front Panel with LED s and Connectors...
Page 69: ...ELCB H172203_1_001 69 234 Figure 8 13 Lock RF Boards Diagnostics...
Page 70: ...ELCB 70 234 H172203_1_001...
Page 120: ...L TRX L 19F 120 234 H172203_1_001...
Page 148: ...BSVT Concept 148 234 H172203_1_001...
Page 166: ...SPB 166 234 H172203_1_001...
Page 172: ...VPSB DC and VPSB DC E 172 234 H172203_1_001 Figure 15 3 Block Diagram of the VPSB DC E...
Page 180: ...VPSB DC and VPSB DC E 180 234 H172203_1_001...
Page 187: ...VTA H172203_1_001 187 234 Figure 16 1 VTA Cable Connectors...
Page 193: ...VTA H172203_1_001 193 234 16 7 Ordering Information See Basic BSVT Configuration 124...
Page 194: ...VTA 194 234 H172203_1_001...
Page 200: ...Nitrogen Level Sensor 200 234 H172203_1_001...
Page 204: ...Radiation Shield Temperature Monitoring MAG RS 204 234 H172203_1_001...
Page 208: ...Installation and Initial Commissioning 208 234 H172203_1_001...
Page 210: ...Operation 210 234 H172203_1_001...
Page 216: ...Replacement of Parts 216 234 H172203_1_001...
Page 222: ...Contact 222 234 H172203_1_001...
Page 226: ...List of Figures 226 234 H172203_1_001...
Page 229: ...Glossary H172203_1_001 229 234 Glossary...
Page 230: ...Glossary 230 234 H172203_1_001...
Page 232: ...Index 232 234 H172203_1_001...
Page 233: ...H172203_1_001 233 234...
Page 234: ...Bruker Corporation info bruker com www bruker com Order No H172203...