The main disadvantage of RF pulse system is interference and noise. RF pulses are used to excite the nuclei in a sample, and any interference or noise can cause the signal to be corrupted. This can make it difficult to get accurate results from the experiment.
Simplicity is not a disadvantage of RF pulse system. In fact, RF pulse systems are designed to be as simple as possible in order to minimize the number of sources of error.
Not real time is not a disadvantage of RF pulse system. RF pulse systems can be used to acquire data in real time, or they can be used to acquire data over a longer period of time. The choice of whether to acquire data in real time or over a longer period of time depends on the specific experiment being performed.
Complexity is not a disadvantage of RF pulse system. RF pulse systems are designed to be as complex as necessary to achieve the desired results. However, complexity can make it difficult to operate and maintain RF pulse systems.
In conclusion, the main disadvantage of RF pulse system is interference and noise.