Protocol: BhXjX  Sequence: bhXjX.c  Apptype: solidseq1d

Description: 

     Constant, linear or tangent-ramped CP from H to X followed by 2D 
     X-x correlation using a constant-time J-inept transfer between X and
     X, with X acquisition using SPINAL or TPPM decoupling. 

Acknowledgement: 

     This sequence was provided by C Reinstra, UIUC. 
     
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 function: _cp_(hx,phHhx,phXhx); phHhx is the overall phase
              table for the H channel and phXhx is that for the X channel.

90X:  Module:  no
Sequence:  onepul.c
Description:  Provides a 90-degree pulse on obs that can be used as a
              preparation pulse. Also used to store the obs calibration.
Parameters:  Channels Page
      aX90  - the amplitude of the pulse.
      pwX90 - the pulse length.

180X:  Module:  no
Sequence:  twopul.c
Description:  Provides a 180-degree pulse on obs that can be used as an
              inversion or a refocussing pulse.
Parameters:  Sequence Page
      aX180 -  the amplitude of the pulse.
      pwX180 - the pulse length.

Parameter: taua: Delay for J-evolution 
Parameter: taub: Delay or J refocussing 
parameter: tZF:  Delay of a Z-filter

Hmixseq:  Module: yes 
Sequence:  redor1tancp.c
Description:  Chooses SPINAL or TPPM decoupling on the dec channel
              during F1 and mixing periods when Hseq is used for
              acquisition.
Parameters:  Sequence Page - the Hmixspinal and Hmixtppm groups
              overlap.  Hmixseq chooses the decoupling sequence TPPM
              or SPINAL.
Implementation:  DSEQ mix = getdseq("H"); The router implements
              getspinal() or gettppm(), as selected.
Underscore functions:  _dseqon(mix); runs _tppm(); or _spinal();
             _dseqoff(mix); runs decprgoff(mix);

Hmixspinal:  Module: yes
Sequence:  redor1tancp.c
Description:  Implements SPINAL decoupling on the dec channel during
              typical F1 and mixing periods when Hspinal is used for
              acquisition.
Parameters:  Sequence Page
       aHmixspinal - amplitude of the dec channel.
       pwHmixspinal - approximate 180-degree flip.
       phHmixspinal - +/- small angle phase. SPINAL64 is implemented
              with phases = +/- 1.0, +/- 1.5 and +/-2.0 times
              phHmixspinal.
       chHmixspinal = 'dec' must be set (not shown).
Implementation: SPINAL mix = getspinal("H"); or DSEQ mix =
             getdseq("H");
Underscore functions: _spinal(mix); and decprgoff(); or _dseqon(mix);
             and _dseqoff(mix);
        
Hmixtppm:  Module: yes
Sequence:  redor1tancp.c
Description:  Implements TPPM decoupling on the dec channel during
              typical F1 and mixing periods when Htppm is used for
              acquisition.
Parameters:  Sequence Page
       aHmixtppm - amplitude of the dec channel.
       pwHmixtppm - approximate 180-degree flip angle on resonance.
       phHmixtppm - +/- small angle phase. TPPM is implemented
              with phases = +/- 1.0 times phHmixtppm for alternating
              pulses.
       chHmixtppm = 'dec' must be set (not shown).
Implementation: TPPM mix = gettppm("H"); or DSEQ mix = getdseq("H");
Underscore functions: _tppm(mix); and decprgoff(); or _dseqon(mix); and
              _dseqoff(mix);

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);





