;cpfprfdr (TopSpin 3.0)
;2D exchange NMR in rotating solids  
;modified by dan

;Proton offset at LG frequency during mix to avoid HH transfer
;use TPPI for transform, phases will be dispersive 

;Avance III version
;parameters:
;d1 : recycle delay
;d0 : =1u t1 evolution period
;in0 : = d9
;pl1 : X power level
;pl1 : power level for X pulses
;sp0 : carbon power level during contact
;pl2 : proton power level during contact 
;pl12 : power level for H 90  
;pl22 : standard proton decoupling 
;pcpd2 : pulse length in decoupling sequence
;p15 : contact time at pl1 (C) and pl2 (H)
;p10 : pulse length for FSLG shape
;p3 : H 90 degree pulse
;p1 : X 90 degree pulse
;p2 : X 180 degree pulse
;cpdprg2 : Sequence used for decoupling in t1 t2 (tppm15, cw, etc.)
;cpdprg1 : cwlg, using pl13
;cpdprg3 : Sequence for decoupling in mixing
;spnam0 : file name for variable amplitude CP
;cnst10  : Frequency reset to Carrier (o1, usually ~100 ppm)
;cnst20 : proton RF field to calculate LG parameters
;cnst21 : =0, proton offset
;cnst22 : +ve Lee-Goldburg offset
;cnst24 : additional Lee-Goldburg offset
;cnst26 : RFDR offset ppm
;cnst31 : spinning frequency

;$COMMENT=exchange NMR (RFDR) in rotating solids, rotor synchronized
;$CLASS=Solids
;$DIM=2D
;$TYPE=cross polarisation
;$SUBTYPE=homonuclear correlation
;$OWNER=Bruker

#include <CHN_defs.incl>
                        ; defines which channel corresponds to which nucleus
#include <lgcalc.incl>
                        ;calculate p5 and frequency offsets cnst22 and 23
#include<trigg.incl>

;######################################################
;#           Define CORD                              #
;######################################################

"d31=1s/cnst31"
"p11=(1s/cnst31)/2"
"d11=30m"
;"d2=p2"
define delay tau
"tau=1s/cnst31-p2/2"
define delay mix
"mix=vd"
						

;######################################################

                            ;##########################
"d0=1u"                     ;#    t1_init => 0, 0     #
                            ;##########################
"l0=0"                      ; #/* house keeping for detection in t1, start at t1=0 for flat baseline */
"acqt0=0"




;######################################################
;#           Start of Active Pulse Program            #
;######################################################

"cnst10=o1"		; set cnst10 to 13C o1

#include <aq_prot.incl>
                        ;allows max. 50 msec acquisition time, supervisor
                        ;may change  to max. 1s at less than 5 % duty cycle
                        ;and reduced decoupling field

  trigg
1 ze
  d31 do:H
2 10m do:H 
  d1 

;######################################################
;#                Initial excitation                  #
;######################################################
  1u trigpe4            ;MAS trigger
  (p3 pl12 ph1):H
  (p15 pl1 ph2):C (p15:sp0 ph10):H

;######################################################
;#                  CT Tau-t1 evolution               #
;######################################################

  (0.1u fq=cnst26(bf ppm)):C  (0.1u cpds3):H 	; switch to selected frequency; turn LG dec
  (tau p2 pl11 ph3):C (vd 0.1u do 0.1u cpds2):H        	;turn tppm dec on
  tau
  (0.1u fq=cnst10(bf hz)):C 			;put carrier to o1p

;#######################################################
;#                     Acquisition                     #
;#######################################################

  go=2 ph31 
  1m do:H
  10m wr #0 if #0 ivd
  lo to 1 times td1
HaltAcqu, 1m
6 exit

;#####################################
;#             Phase Cycle           #
;#####################################

ph0= 0
ph1= 1 3
ph2= 0 0 2 2 1 1 3 3
ph3= 0 0 2 2 1 1 3 3
ph10= 0
ph31= 0 2 2 0 1 3 3 1


;#####################################
;#      END SEQUENCE                 #
;#####################################