iSpin-NMR
IV. General Operation Description
The iSpin-NMR is designed to be simple, intuitive and effective. The following is an outline of how
the iSpin-NMR operates for typical NMR/NQR experiments.
1. The user inputs the necessary parameters into SpinCore's NMR GUI or alternative
software program.
2. When the user begins the scan, the iSpin-NMR generates the NMR excitation pulses
depending on the input parameters.
3. During specific intervals in the pulse sequence (typically after the excitation pulse in a
single-pulse NMR experiment), the system will acquire the data returned from the
sample in the sample probe. The iSpin-NMR system digitizes the signal and performs
digital detection, filtering, and autonomous signal averaging. The processed digital
values are stored on the iSpin-NMR console and are available for download to the host
computer at the user's convenience.
4. Transmit/Receive Circuitry (sold as a separate component) will automatically switch
between the excitation pulses and the signal input from the probe. The input signal from
the sample probe is passed through a lambda-quarter cable (part of the
Transmit/Receive switching circuit), fed into a pre-amplifier inside the iSpin-NMR
system, and then follows to the digital receiver on the RadioProcessor board inside the
iSpin-NMR system for digitization and digital signal processing.
5. The system continues to scan the specified number of times, automatically averaging
the values stored on chip for each scan. Data may be downloaded to the host computer
at any time for inspection, visualization, and processing, without interfering with the
ongoing data acquisition. The user can download the data received from the
RadioProcessor using SpinCore's NMR GUI, SpinCore's non-GUI C/C++ program, or
alternative software tools.
6. NMR/NQR data are saved on the host computer in three different formats, including
ASCII (plain text file) and JCAMP-DX, for post-acquisition processing, visualization, and
analysis.
For a more detailed description of iSpin-NMR operation, please consult section VII, “Using the
iSpin-NMR System,” in this manual.
2020-07-21
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