Varian dpfgse satxfer.c saturation transfer with DPFGSE water suppression

Setup macro

dpfgse_satxfer - type that in vnmr or vnmrj and most parameters will be reasonably set

pw (needs calibration), tpwr (typ. 62), tof - ¹H 90^o pulse length, its power level and transmitter offset
trim, trimpwr - trim pulse length and power (applied at tof), on if trim_flg='y'
satpw (50 ms), satshape ('gauss'), satpwr (~86 Hz peak power), satfrq (on intense protein peak, no ligand) - length, shape, power level, and transmitter offset for the selective protein saturation pulse.
wrefpw, wrefshape, wrefpwr, wrefpwrf (use only if wrefpw can't be adjusted, otherwise set to maximum) - length, shape, power level, fine power level for the solvent-selective 180^o pulse used for the solvent suppression in the dpfgse part. Recommended wrefshape='square' - you should have file shapelib/square.RF on your system
satfrqref (30 ppm) - transmitter offset far from any resonance

gzlvl0, gt0 - part of gradient-90^o-gradient water suppression sequence activated by sspul='y'
gzlvl2, gt2 - gradient for dpfgse
gstab - gradient recovery delay will depend on probe (typ. 100-200 ms)

d1 (>xferdly) - relaxation delay - includes xferdelay. Actual relaxation delay is what is longer than xferdly
xferdly (1.5-2s) - saturation transfer delay - part of d1.
d3 (50 ms) - delay between saturation pulses
gstab - gradient recovery delay (see above)

sspul - if ='y' gradient-90^o-gradient scheme before d1 will be in effect
dpfgse_flg - if ='y', dpfgse before acquisition will be used
trim_flg - if ='y', trim pulse will be used
alt_grd - if ='y', sign of the dpfse gradient will be alternated in + + - - for each new scan.