Protocol: Tancp1dptrfdr  Sequence: tancp1dptrfdr.c  Apptype: solidseq1d

Description:

        Preparation of "X" with CP, Pi-Thirds constant-time,
        finite-pulse XY4 RFDR mixing with SPINAL or TPPM
        decoupling.

Additional Software:

reset_ptrfdr - This macro uses the calibrated values of pwX90, aX90 and
srate to set up the fpRFDR recoupling sequence.  tXmix is rounds to four
rotor periods. This macro is executed in 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);

fprfdrX:  Module:  yes
Sequence:  tancp1fpdrfdr.c
Description:  Implements Finite Pulse RFDR with a single pi pulse
              that occupies the center third of the rotor period and
              an XY4 phase cycle.
Parameters:  Sequence Page
       aXfprfdr - amplitude of dec pulses.
       pwXfprfdr - 180-degree flip on obs.
       qXfprfdr - 4.0*tauR RFDR cycles represented in the .DEC file.
       ofXfprfdr - overall frequency offset.
       chXfprfdr = 'obs' must be set (not shown).
Implementation: MPSEQ fp = getrfdr("fprfdrX",0,0.0,0.0,0,1);
Underscore functions: _MPSEQ functions.

ptrfdrX:  Module:  yes
Sequence:  tancp1dptrfdr.c
Description:  Implements PiThirds with Finite Pulse RFDR using a 
              single pi pulse that occupies the center third of the 
              rotor period and an XY4 phase cycle.
Parameters:  Sequence Page
       aXptrfdr - amplitude of dec pulses.
       pwXptrfdr - 180-degree flip on obs.
       qXptrfdr - 4.0*tauR RFDR cycles represented in the .DEC file.
       ofXptrfdr - overall frequency offset.
       chXptrfdr = 'obs' must be set (not shown).
Implementation: MPSEQ pt = getptrfdr("ptrfdrX",0,0.0,0.0,0,1);
Underscore functions: _MPSEQ functions.

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 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);
