Protocol: Pisematest  Sequence: pisematest1.c  Apptype: solidseq1d

Description:

   A sequence to provide a test of the FSLG Spinlock 
   for PISEMA.  X Decoupling during FSLG if aXlock > 0.0.  

Additional Software

   reset_pisema - This macro uses the calibrated values of pwH90 
   and aH90 to calculate the initial parameters for the fslgH 
   waveform and sets up 2D parameters. reset_pisema2d is run from 
   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);  

fslgH:  Module:  yes 
Sequence:  tancpxfslg.c      
Description:  Implements "frequency switched Lee Goldburg", FSLG, 
              homonuclear decoupling on the dec channel.
Parameters:  Sequence Page
       aHfslg - amplitude of the FSLG dec pulses.
       pwHfslg - 360-degree flip on dec, off resonance (the length of 
              each of the two FSLG pulses).  
       nHfslg - FSLG cycles represented in the .DEC file. 
       ofdHfslg - +/- frequency offset of alternating pulses, a 
negative value indicates that 
              the first pulse has negative offset. 
       ofHfslg - overall frequency offset.
       chHfslg = 'dec' must be set (not shown). 
Implementation: MPSEQ fslg = getfslg("fslgH",0,0.0,0.0,0,1); 
Underscore functions: _MPSEQ functions.   

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.  scalef1H:  (processing) 

scalef1H: (processing)  Module:  no 
Sequence:  hetcorlgcp2d.c
Description:  Shows the F1 scale factor, scalesw1, for evolution of the 
              dec nuclei under a multiple-pulse waveform.
Parameters:  Sequence Page
       scalesw1 - the F1 scale factor. Typically scalesw1 is the 
              inverse of the mutiple-pulse scale factor. 
 
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 decoupling 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);   
