| 摘要 |
PROBLEM TO BE SOLVED: To enable signal processing with a high degree of freedom to be performed simultaneously with quadrature detection during execution of measurement in a magnetic resonance measurement apparatus such as an NMR measurement apparatus.SOLUTION: Mixers 98, 100 multiply a digital reception signal 97 indicating an NMR measurement result by a pair of reference signals (cos signal, sin signal) 99 generated by a reference signal generation circuit 102. The reception signal is thereby converted to a complex signal 101. The reference signal generation circuit 102 has two reception NCOs for generating the pair of reference signals. The reception NCO has an optional frequency generation function, a frequency modulation function, and a phase modulation function. The operation of the two reception NCOs is controlled by a reception sequencer. It is made possible to dynamically switch a phase modulation condition or a frequency modulation condition by dynamically changing the operation of each reception NCO during execution of measurement. It is also made possible to dynamically change the frequency of the reference signal.SELECTED DRAWING: Figure 3 |
