ELCB
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8
ELCB
8.1
Introduction
The Extended Lock Control Board (ELCB) combines two former boards, the CPU and the
LCB. Therefore it provides two main functions - the Digital Lock (as it is described in the
Deadalus Lock Manual) and the control of the complete AV4 BSMS, (e. g. Shim, Lift,
Gradient Amplifier). The latter functions are described in the AV4 BSMS chassis and related
subunit chapters.
All former Lock functions have been adapted to the new hardware platform. The analog
design of the current source is basically the same as on the LCB, however some of the
former components have been replaced by modern ones. Therefore, the electrical
performance could be improved in parts.
Using the same algorithm for evaluation of the closed loop Lock regulation, the new ELCB is
fully compatible with the LCB. It has the same or a better performance for NMR experiments.
Since the new DSP has a much higher performance, it provides faster handling of real time
Lock Hold pulses, which now may range down to a length of 100 microseconds.
Additionally, it was possible to implement a more sophisticated method for locking in, which is
now very reliable. While the Lock is sweeping, the „wiggles“ of the Lock signal are now
analyzed. This provides a simple and fast lock in. The Auto-Lock functions have been
optimized as well.
8.2
Lock Parameters and Technical Data
Parameter
Min
Factory
Default
Max
Unit
Notes
Lock Field (H0)
-9999
-170
+5000
+9999
+170
Field Units
mA
Lock Regulator
-99
-1.70
0
+99
+1.70
Field Units
mA
Sweep Amplitude
0
100
4000
68.0
100
4000
68.0
Sweep Units
Field Units
mA
Sweep Rate
0.01
2.00
5.00
Hz
Lock Phase
0.0
180.0
359.9
Degrees
1)
Lock Power
-50.0
-60.0
-60.0
0.0
0.0
0.0
+10.0
+0.0
+10.0
dB
dB
dB
2)
Lock RF Gain 2H
Lock RF Gain 19F
75.0
55.0
120.0
120.0
155.0
135.0
dB
dB
Lock Shift
-200.0
0.0
200.0
ppm
Lock Drift
-2000.0
0
2000.0
Field Units/24
hours
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...