44 (327) BRUKER BIOSPIN User Manual Version 002
General Hardware Setup
Figure 3.34. Possible Modifiers for Probe Tuning Ranges (400 MHz and up only)
Figure 3.34.
illustrates modifiers for probe tuning ranges for 400 MHz and up on-
ly. In 300 MHz and lower probes only a λ/4 line can be used, because a λ/2 would
be too long, but here λ/4 can be tuned over the full range.
All these modifications may be available for WB probes. In SB probes, they are
usually built in (if necessary) and operated by a switch.
1. X-frequency in
2. X-tuning
3. NMR Coil
4. lambda/4 switch
5. Parallel capacitance
6. Parallel inductance
7. Serial capacitance
8. H-tuning
1
2
3
5
6
7
8
4