Protocol: Tancpxdec2  Sequence: tancpxdec2.c  Apptype: solidseq1d

Description:

Constant, linear or tangent-ramped cross polarization (CP) with a
choice of SPINAL64 or TPPM decoupling on both H and X.

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);  
 
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);   

Yspinal:  Module:  yes
Sequence:  decorcptan2d.c
Description:  Implements SPINAL decoupling on the dec2 channel during
              acquisition.
Parameters:  Sequence Page
        aYspinal - amplitude of the dec channel.
        pwYspinal - approximate 180-degree flip.
        phYspinal - +/- small angle phase. SPINAL64 is implemented with
              phases = +/- 1.0, +/- 1.5 and +/-2.0 times phYspinal.
        chYspinal = 'dec2' must be set (not shown).
Implementation: SPINAL dec2 = getspinal("Y"); or DSEQ dec2 =
               getdseq("Y");
Underscore functions: _spinal(dec2); and dec2prgoff(); or
       _dseqon(dec2); and _dseqoff(dec2);

Ytppm:  Module:  yes
Sequence:  decorcptan2d.c
Description:  Implements TPPM decoupling on the dec2 channel during
              acquisition.
Parameters:  Sequence Page
       aYtppm - amplitude of the dec channel.
       pwYtppm - approximate 180-degree flip.
       phYtppm - +/- small angle phase.   TPPM is implemented with
              phases = +/- 1.0, times phYtppm.
       chYspinal = 'dec2' must be set (not shown)
Implementation: TPPM dec2 = gettppm("Y"); or DSEQ dec2 = getdseq("Y");
Underscore functions: _tppm(dec2); and dec2prgoff(); or _dseqon(dec2);
              and _dseqoff(dec2);
