Protocol: Masapt1d  Sequence: masapt1d.c  Apptype: solidseq1d

Description:

   An "X" attached proton ("H") test using FSLG homonuclear decoupling
   on "H", tangent CP preparation of "X", with TPPM or SPINAL decoupling.

Additional Software

reset_masapt - Uses the values of aH90 and pwH90 to set up FSLG.  Uses the 
   value of srate and pwHfslg to calculate synchronize tHXaptf with the rotor. 
   aHhxaptf, aXhxaptf, pwHhxaptf, pwXhxaptf are set from aH90, aX90, pwH90 
   and pwX90. This macro is executed by the protocol.

Parameter Groups

90H:  Module:  no
Sequence:  tancpx.c
Description:  Provides a 90-degree pulse on dec that can be used
              as a preparation pulse. Also used to store the dec
              calibration.
Parameters:  Channels Page
       aH90  - the amplitude of the pulse.
       pwH90 - the pulse length.

cpHX:  Module:  yes
Sequence:  tancpx.c
Description:  Implements constant, linear or tangent-ramped cross
              polarization from dec to obs.
Parameters:  Sequence Page
       shHX - 'c', constant, 'l', linear and 't', tangent shape on
               the channel designated with chHX.
       chHX - the variable-amplitude channel, 'fr' from or 'to', to.
       aHhx - median amplitude of the dec channel.
       aXhx - median amplitude of the obs channel.
       bHX -  +/- tangent curvature (>0 to 1.0e5).
       dHX -  amplitude width of the ramp. A negative width sets a
              ramp that starts high and decreases in amplitude.
       tHX -  contact time
       ofHX - overall offset on the variable channel
       frHX = 'dec' -  channel with the initial polarization (must
              be set - not shown).
       toHX = 'obs' -  channel with the final polarization (must be
              set - not shown).
Implementation:  CP hx = getcp("HX",0.0,0.0,0,1);
Underscore functions: _cp_(hx,phHhx,phXhx);

aptfHX:  Module: no
Sequence:  masapt1d.c
Description:  Shows the parameters for an attached proton test, APT,
              sequence with an FSLG waveform in between the dec pulses.
              fslgH must also be defined.
Parameters:  Sequence Page
       aHhxaptf - amplitude of dec pulses.
       aXhxaptf - amplitude of obs pulses.
       pwHhxaptf - 180-degree flip on obs.
       pwXhxaptf - 180-degree flip on dec.
       tHXaptf - delay for J-evolution.

fslgX:  Module: yes
Sequence:  none
Description:  Implements "frequency switched Lee Goldburg", FSLG,
              homonuclear decoupling on the obs channel.
Parameters:  Sequence Page
       aXfslg - amplitude of FSLG obs pulses.
       pwXfslg - 360-degree flip on obs, off resonance (the length of
              each of the two FSLG pulses).
       nXfslg - FSLG cycles represented in the .DEC file.
       ofdXfslg - +/- frequency offset of alternating pulses, a
              negative value indicates that the first pulse has
              negative offset.
       ofXfslg - overall frequency offset.
       chXfslg = 'obs' must be set (not shown).
Implementation: MPSEQ fslg = getfslg("fslgX",0,0.0,0.0,0,1);
Underscore functions: _MPSEQ functions.

Hseq:  Module:  yes
Sequence:  tancpx.c
Description: Chooses SPINAL or TPPM decoupling on the dec channel
             during acquisition
Parameters:  Sequence Page - the Hspinal and Htppm groups overlap
       Hseq - chooses the decoupling sequence, TPPM or SPINAL.
Implementation:  DSEQ dec = getdseq("H");  The router implements
             getspinal() or gettppm().
Underscore functions: _dseqon(dec); runs _tppm(); or _spinal();_
             dseqoff(dec); runs decprgoff();

Hspinal:  Module:  yes
Sequence: tancpx.c 
Description:  Implements SPINAL decouping on the dec channel during
              acquisition.
Parameters:  Sequence Page
       aHspinal - amplitude of the dec channel.
       pwHspinal - approximate 180-degree flip angle on resonance.
       phHspinal - +/- small angle phase. SPINAL64 is implemented
              with phases = +/- 1.0, +/- 1.5 and +/-2.0 times
              phHspinal.
       chHspinal = 'dec' must be set (not shown).
Implementation: SPINAL dec = getspinal("H"); or DSEQ dec =
              getdseq("H");
Underscore functions: _spinal(dec); and decprgoff(); or
             _dseqon(dec); and _dseqoff(dec);

Htppm:  Module:  yes
Sequence:  tancpx.c
Description:  Implements TPPM decoupling on the dec channel during
              acquisition.
Parameters:  Sequence Page
       aHtppm - amplitude of the dec channel.
       pwHtppm - approximate 180-degree flip angle on resonance.
       phHtppm - +/- small angle phase. TPPM is implemented
              with phases = +/- 1.0 times phHtppm for alternating
              pulses.
       chHtppm = 'dec' must be set (not shown).
Implementation: TPPM dec = gettppm("H"); or DSEQ dec = getdseq("H");
Underscore functions: _tppmon(dec); and decprgoff(); or _dseqon(dec);
              and _dseqoff(dec);

