The acquisition of the NMR signal is the last step in any NMR experiment. During this period, the NMR signal is recorded in the time domain as a free-induction decay. When acquire ¹H signal no other perturbation are usually applied. Thus, ¹H signal is recorded with full information about homo- and heteronuclear NMR parameters.

Other ¹H acquisition schemes are available:

• ¹H acquisition using homodecoupling
• ¹H acquisition using band-selective homodecoupling
• ¹H acquisition with X-decoupling
• ¹H acquisition with selective X-decoupling
• ¹H acquisition with X,Y-decoupling

Easy implementation on AVANCE spectrometers.

 For more experimental details see Tutorials: Calibration pulses.

The standard way to implement a ¹H acquisition period is:

... 2 d1 ... go=2 ph31 ...

in which:

• go starts data acquisition during an acq period using the acquisition parameters previously defined in eda.
• The number after go (=2) defines the loop to be executed.the number of scans (ns) defines the number of times this loop is repeated.
• ph31 is the receiver phase specified at the end of pulse program and must be cycled in accordance to all pulses involved in the pulse sequence.