amplitude-modulated
experiments

SPAM-echo/antiecho (2D only)

MQMAS data processing:
Shearing the 2D spectrum with AU program xfshear 2005

Z-filter

Cogwheel z-filter for I = 3/2

Definition of echo and antiecho signals

MQMAS data processing:
Shearing the 2D spectrum with AU program xfshear 2001

z-filter ±3QMAS for I = 3/2, 5/2, and 7/2

z-filter ±5QMAS for I = 5/2, 7/2, and 9/2

z-filter ±7QMAS for I = 7/2 and 9/2

z-filter ±9QMAS for I = 9/2

Shifted-echo with 3 strong pulses

Shifted-echo with 3 pulses

Two-pulse

phase-modulated
experiments

Multiplex SPAM (2D only)

Multiplex z-filter (2D only)

Split-t1

Cogwheel split-t1 3QMAS for I = 3/2

Split-t2 with two pulses

Shifted-echo for I = 3/2 with 3 strong pulses

Shifted-echo for I = 3/2 with 3 pulses

Shifted-echo for I > 3/2 with 3 strong pulses

Shifted-echo for I > 3/2 with 3 pulses

Cogwheel shifted-echo 3QMAS for I = 5/2

1-D experiments

• qcpmgall.av, pulse program which samples continuously, including ALL pulses and ringdown delays
• au_qcpmg, AU program which takes out data points sampled during pulses and ring down delays.
  If digmod is used, convert data to analog with convdta command.
  ALWAYS use this AU program on a COPY of dataset.
• qcpmgaddjt from Julien Trébosc, AU program which stores echos from qcpmgall.av pulse program by adding them up.
  Use absolute scale for Y-axis to check the amplitude of echo in the FID window.
  If digmod is used, convert data to analog with convdta command.
  ALWAYS use this AU program on a COPY of dataset.
• qcpmgsplit, AU program for splitting CPMG echo train acquired with qcpmgall.av pulse program. These echoes allow T2 measurement.

• hpdecqcpmgall.av, pulse program for performing CPMG experiment with high power decoupling , which samples continuously, including ALL pulses and ringdown delays
• cpqcpmgall.av, pulse program for performing basic cross-polarisation experiment with CPMG detection, which samples continuously, including ALL pulses and ringdown delays