/****************************************************************************** ghbha_co_nh.c 3D HBHA(CO)NH gradient sensitivity enhanced version. Correlates Hb(i),Ha(i) with N(i+1), NH(i+1). Uses constant time evolution for the HaHb shifts and for the 15N shifts. Standard features include maintaining the 13C carrier in the CaCb region throughout using off-res SLP pulses; full power square pulses on 13C initially when 13CO excitation is irrelevant; square pulses on the Ca and CaCb with first null at 13CO; one lobe sinc pulses on 13CO with first null at Ca; shaka6 composite 180 pulse to simultaneously refocus Ca and invert CO; optional 2H decoupling when CaCb magnetization is transverse for 4 channel spectrometers. Magic-angle option for coherence transfer gradients. TROSY option for N15/H1 evolution/detection. pulse sequence: Grzesiek and Bax, J Biomol NMR 3 (1993) 185-204. SLP pulses: J Magn. Reson. 96, 94-102 (1992) shaka6 composite: Chem. Phys. Lett. 120, 201 (1985) TROSY: JACS, 120, 10778 (1998) Written by M.T. @NMRFAM on May 2003 by combining the ghc_co_nh and gcbca_co_nh pulsesequences from BioPack. CHOICE OF DECOUPLING AND 2D MODES Set dm = 'nnn', dmm = 'ccc' Set dm2 = 'nny', dmm2 = 'ccg' (or 'ccw', or 'ccp') for 15N decoupling. Set dm3 = 'nnn' for no 2H decoupling, or 'nyn' and dmm3 = 'cwc' for 2H decoupling. Must set phase = 1,2 and phase2 = 1,2 for States-TPPI acquisition in t1 [13C] and t2 [15N]. The flag f1180/f2180 should be set to 'y' if t1/t2 is to be started at halfdwell time. This will give -90, 180 phasing in f1/f2. If it is set to 'n' the phasing should be 0,0 and will still give a perfect baseline. Thus, set f1180='n' for (0,0) in 13C and f2180='n' for (0,0) in 15N. f1180='y' is ignored if ni=0, and f2180='y' is ignored if ni2=0. NOTES FOR RUNNING HIFI NMR: to run HIFI experiments you can either use HIFI='t' or HIFI='s'. HIFI='t' the angle of the tilted plane can be specified directly using the parameter tilt, e.g.: tilt=45 to record a 45 degrees tilted plane. The tilted plane is then obtained by dividing sw1/cos(tilt) and sw2/sin(tilt) and evolving both dimensions simultaneously, point by point. HIFI='s' both dimensions are evolved simultaneously by using the sw1 and sw2 values as entered. The tilted angle can then be calculated from the ratio between sw1/sw2 (the paramter tilt is not used). Since for HIFI spectra both indirect dimensions are evolved simultaneously, the same number of increments (ni) is used for both dimensions. Note: ni2 is not used. Similarly, to start both indirect dimensions at half of the dwell-time, set f1180='y' (f2180 is not used). You can either start BOTH indirect dimensions at time zero (f1180='n') or at half of the dwell-time (f1180='y'). Starting one dimension at half of the dwell-time and the other at zero will result in an un-phaseable spectrum and thus is NOT allowed. To obtain quadrature detection for both indirect dimensions, both phase and phase2 MUST be used by typing: phase=1,2 phase2=1,2 . Make sure that phase is arrayed before phase2, so that the order of the array will be : array='phase,phase2' You can also set the order of the array directly by typing: array='phase,phase2' DETAILED INSTRUCTIONS FOR USE OF ghbha_co_nh 1. Obtain a printout of the Philosopy behind the BioPack development, and General Instructions using the macro: "printon man('BioPack') printoff". These Detailed Instructions for ghbha_co_nh may be printed using: "printon man('ghbha_co_nh') printoff". 2. Apply the setup macro "ghbha_co_nh". This loads the relevant parameter set and also sets ni=ni2=0 and phase=phase2=1 ready for a 1D spectral check. 3. The two C13 180 degree pulses between points c and d have been replaced by a single 6-pulse composite dubbed "shaka6" which povides near perfect refocusing with no phase roll over the Cab region and near perfect inversion over the CO region 18kHz off-resonance provided pwC < 20 us in a 600 MHz system. 4. Centre H1 frequency on H2O (4.7ppm), C13 frequency on 46ppm, and N15 frequency on the amide region (120 ppm). The C13 frequency remains at 46ppm, ie at CaCb throughout the sequence. 5. The H1 frequency is NOT shifted to the amide region during the sequence. The H1 DIPSI2 decoupling is controlled by the waltzB1 parameter. 6. The parameter phi7cal (listed in dg and dg2) is provided to adjust the phase of the last 90 degree C13 pulse, which is phase-shifted by the prior 180 degree pulse on the Ca region and by the use of SLP pulses on the CO region. The experimentally determined value of this phase is also very sensitive to small timing differences (microseconds) between the two theta delays. Check this phase via 1D spectra - maximise signal, or for greater accuracy obtain the value for a null and then add or subtract 90 degrees. The value must be a positive number. It needs to be calibrated once only for each spectrometer and the gc_co_nh, the gcbca_co_nh and the ghbha_co_nh pulse sequences. 7. tauCH (1.7 ms) and timeTN (14 ms) were determined for alphalytic protease and are listed in dg2 for possible readjustment by the user. 8. The coherence-transfer gradients using power levels gzlvl1 and gzlvl2 may be either z or magic-angle gradients. For the latter, a proper /vnmr/imaging/gradtable entry must be present and syscoil must contain the value of this entry (name of gradtable). The amplitude of the gzlvl1 and gzlvl2 should be lower than for a z axis probe to have the x and y gradient levels within the 32k range. For any value, a dps display (using power display) shows the x,y and z dac values. These must be <=32k. 9. TROSY: Set TROSY='y' and dm2='nnn' for a TROSY spectrum of the bottom right peak of the 2D coupled NH quartet (high-field H1, low-field N15). The TROSY spectrum gives 50% S/N compared to the decoupled spectrum for a small peptide. To select any of the other three peaks of the 2D coupled quartet, in a clockwise direction from bottom right, change t4/t10 from x/y to x/-y to -x/-y to -x/y. NOTE, the phases of the SE train are almost the same as those determined for the gNhsqc sequence. The major difference is that kappa is eliminated compared to normal gcbca_co_nh so the N15 magnetization has not evolved with respect to the attached H's. I.e. the N15 state would be Ix rather than IySz if there was no coherence gradient - this imparts a 90 degree shift so t8 is changed to y (from x in the normal spectrum). Also gzlvl1 is after the 180 N15 pulse rather than before as in gNhsqc, so the sign of icosel and the t4/t10 phase2 increments are also swapped compared to gNhsqc. 10. The autocal and checkofs flags are generated automatically in Pbox_bio.h If these flags do not exist in the parameter set, they are automatically set to 'y' - yes. In order to change their default values, create the flag(s) in your parameter set and change them as required. The available options for the checkofs flag are: 'y' (yes) and 'n' (no). The offset (tof, dof, dof2 and dof3) checks can be switched off individually by setting the corresponding argument to zero (0.0). For the autocal flag the available options are: 'y' (yes - by default), 'q' (quiet mode - suppress Pbox output), 'r' (read from file, no new shapes are created), 's' (semi-automatic mode - allows access to user defined parameters) and 'n' (no - use full manual setup, equivalent to the original code). ******************************************************************************/ #include #include #include "Pbox_bio.h" /* Pbox Bio Pack Pulse Shaping Utilities */ static int /* T is for TROSY='y', phx etc also enable TROSY phase changes */ phx[1]={0}, phy[1]={1}, phi5[2] = {0,2}, phi6[2] = {2,0}, phi9[8] = {0,0,1,1,2,2,3,3}, rec[4] = {0,2,2,0}, recT[2] = {3,1}; static double d2_init=0.0, d3_init=0.0; static double H1ofs=4.7, C13ofs=46.0, N15ofs=120.0, H2ofs=0.0; static shape offC1, offC2, offC4, offC5, offC7; pulsesequence() { /* DECLARE AND LOAD VARIABLES */ char f1180[MAXSTR], /* Flag to start t1 @ halfdwell */ f2180[MAXSTR], /* Flag to start t2 @ halfdwell */ mag_flg[MAXSTR], /* magic-angle coherence transfer gradients */ TROSY[MAXSTR], /* do TROSY on N15 and H1 */ HIFI[MAXSTR]; /* flag for running HIFI stuff */ int icosel, /* used to get n and p type */ t1_counter, /* used for states tppi in t1 */ t2_counter, /* used for states tppi in t2 */ ni = getval("ni"), ni2 = getval("ni2"); double tof1=getval("tof1"), /* offset for 1H indirect dimension */ shift=0.0, /* angle required to shift indirect dimension */ tilt=getval("tilt"), /* angle for HIFI tilted planes */ tau1, /* t1 delay */ t1a, /* time increments for first dimension */ t1b, t1c, tau2, /* t2 delay */ halfT2,t2a,t2b,CTdelay, tauCH = getval("tauCH"), /* 1/4J delay for CH */ timeTN = getval("timeTN"), /* constant time for 15N evolution */ timeAB = getval("timeAB"), zeta = 3.0e-3, eta = 4.6e-3, theta = 14.0e-3, kappa = 5.4e-3, lambda = 2.4e-3, sheila, /* to transfer J evolution time hyperbolically into tau1 */ bw, ofs, ppm, /* temporary Pbox parameters */ pwClvl = getval("pwClvl"), /* coarse power for C13 pulse */ pwC = getval("pwC"), /* C13 90 degree pulse length at pwClvl */ rf0, /* maximum fine power when using pwC pulses */ /* 90 degree pulse at Cab(46ppm), first off-resonance null at CO (174ppm) */ pwC1, /* 90 degree pulse length on C13 at rf1 */ rf1, /* fine power for 5.1 kHz rf for 600MHz magnet */ /* 180 degree pulse at Cab(46ppm), first off-resonance null at CO(174ppm) */ pwC2, /* 180 degree pulse length at rf2 */ rf2, /* fine power for 11.4 kHz rf for 600MHz magnet */ /* the following pulse lengths for SLP pulses are automatically calculated */ /* by the macro "proteincal". SLP pulse shapes, "offC4" etc are called */ /* directly from your shapelib. */ pwC4, /*180 degree pulse at Ca(56ppm) null at CO(174ppm) */ pwC5, /* 90 degree selective sinc pulse on CO(174ppm) */ pwC7, /* 180 degree selective sinc pulse on CO(174ppm) */ rf4, /* fine power for the pwC4 ("offC4") pulse */ rf5, /* fine power for the pwC5 ("offC5") pulse */ rf7, /* fine power for the pwC7 ("offC7") pulse */ compH = getval("compH"), /* adjustment for C13 amplifier compression */ compC = getval("compC"), /* adjustment for C13 amplifier compression */ phi7cal = getval("phi7cal"), /* phase in degrees of the last C13 90 pulse */ pwH, /* H1 90 degree pulse length at tpwr1 */ tpwr1, /* 7.3 kHz rf for DIPSI-2 */ DIPSI2time, /* total length of DIPSI-2 decoupling */ ncyc_dec, waltzB1=getval("waltzB1"), /* RF strength for 1H decoupling */ pwNlvl = getval("pwNlvl"), /* power for N15 pulses */ pwN = getval("pwN"), /* N15 90 degree pulse length at pwNlvl */ sw1 = getval("sw1"), sw2 = getval("sw2"), gt1 = getval("gt1"), /* coherence pathway gradients */ gt2 = getval("gt2"), gzcal = getval("gzcal"), /* g/cm to DAC conversion factor */ gzlvl1 = getval("gzlvl1"), gzlvl2 = getval("gzlvl2"), gt0 = getval("gt0"), /* other gradients */ gt3 = getval("gt3"), gt4 = getval("gt4"), gt5 = getval("gt5"), gstab = getval("gstab"), gzlvl0 = getval("gzlvl0"), gzlvl3 = getval("gzlvl3"), gzlvl4 = getval("gzlvl4"), gzlvl5 = getval("gzlvl5"), gzlvl6 = getval("gzlvl6"); getstr("f1180",f1180); getstr("f2180",f2180); getstr("mag_flg",mag_flg); getstr("TROSY",TROSY); getstr("HIFI",HIFI); /* LOAD PHASE TABLE */ settable(t3,1,phx); settable(t4,1,phx); settable(t5,2,phi5); settable(t6,2,phi6); if (TROSY[A]=='y') {settable(t8,1,phy); settable(t9,1,phx); settable(t10,1,phy); settable(t11,1,phx); settable(t12,2,recT);} else {settable(t8,1,phx); settable(t9,8,phi9); settable(t10,1,phx); settable(t11,1,phy); settable(t12,4,rec);} /* INITIALIZE VARIABLES */ if( dpwrf < 4095 ) { printf("reset dpwrf=4095 and recalibrate C13 90 degree pulse"); abort(1); } if( pwC > 24.0e-6*600.0/sfrq ) { printf("increase pwClvl so that pwC < 24*600/sfrq"); abort(1); } /* maximum fine power for pwC pulses */ rf0 = 4095.0; setautocal(); /* activate auto-calibration flags */ if (autocal[0] == 'n') { /* 90 degree pulse on Cab, null at CO 128ppm away */ pwC1 = sqrt(15.0)/(4.0*128.0*dfrq); rf1 = (compC*4095.0*pwC)/pwC1; rf1 = (int) (rf1 + 0.5); /* 180 degree pulse on Cab, null at CO 128ppm away */ pwC2 = sqrt(3.0)/(2.0*128.0*dfrq); rf2 = (4095.0*compC*pwC*2.0)/pwC2; rf2 = (int) (rf2 + 0.5); /* 180 degree pulse on Ca, null at CO 118ppm away */ pwC4 = getval("pwC4"); rf4 = (compC*4095.0*pwC*2.0)/pwC4; rf4 = (int) (rf4 + 0.5); /* 90 degree one-lobe sinc pulse on CO, null at Ca 118ppm away */ pwC5 = getval("pwC5"); rf5 = (compC*4095.0*pwC*1.69)/pwC5; /* needs 1.69 times more */ rf5 = (int) (rf5 + 0.5); /* power than a square pulse */ /* 180 degree one-lobe sinc pulse on CO, null at Ca 118ppm away */ pwC7 = getval("pwC7"); rf7 = (compC*4095.0*pwC*2.0*1.65)/pwC7; /* needs 1.65 times more */ rf7 = (int) (rf7 + 0.5); /* power than a square pulse */ } else /* if autocal = 'y', 'q', or 's' */ { if(FIRST_FID) /* call Pbox */ { ppm = getval("dfrq"); bw = 128.0*ppm; ofs = 128.0*ppm; offC1 = pbox_Rcal("square90n", bw, compC*pwC, pwClvl); offC2 = pbox_Rcal("square180n", bw, compC*pwC, pwClvl); bw = 118.0*ppm; offC5 = pbox_make("offC5", "sinc90n", bw, ofs, compC*pwC, pwClvl); offC7 = pbox_make("offC7", "sinc180n", bw, ofs, compC*pwC, pwClvl); ofs = 10.0*ppm; offC4 = pbox_make("offC4", "square180n", bw, ofs, compC*pwC, pwClvl); if (dm3[B] == 'y') H2ofs = 3.2; ofs_check(H1ofs, C13ofs, N15ofs, H2ofs); } pwC1 = offC1.pw; rf1 = offC1.pwrf; pwC2 = offC2.pw; rf2 = offC2.pwrf; pwC4 = offC4.pw; rf4 = offC4.pwrf; pwC5 = offC5.pw; rf5 = offC5.pwrf; pwC7 = offC7.pw; rf7 = offC7.pwrf; } /* power level and pulse times for DIPSI 1H decoupling */ DIPSI2time = 2.0*3.0e-3 +2.0*14.0e-3 +2.0*timeTN -5.4e-3 +0.5*pwC1 +2.0*pwC5 +5.0*pwN +2.0*gt3 +1.0e-4 +4.0*GRADIENT_DELAY +2.0*POWER_DELAY +8.0*PRG_START_DELAY; pwH = 1.0/(4.0*waltzB1); ncyc_dec = (DIPSI2time*90.0)/(pwH*2590.0*4.0); ncyc_dec = (int) (ncyc_dec+0.5); pwH = (DIPSI2time*90.0)/(ncyc_dec*2590.0*4.0); /*fine correction of pwH */ tpwr1 = 4095.0*(compH*pw/pwH); tpwr1 = (int) (2.0*tpwr1 + 0.5); /* x2 because obs atten will be reduced by 6dB */ if (ix == 1) { fprintf(stdout, "\nNo of DIPSI-2 cycles = %4.1f\n",ncyc_dec); fprintf(stdout, "\nfine power for DIPSI-2 pulse =%6.1f\n",tpwr1); } /* CHECK VALIDITY OF PARAMETER RANGES */ /*** if ( 0.5*ni2*1/(sw2) > timeTN - WFG3_START_DELAY) { printf(" ni2 is too big. Make ni2 equal to %d or less.\n", ((int)((timeTN - WFG3_START_DELAY)*2.0*sw2))); } ***/ if ( dm[A] == 'y' || dm[B] == 'y' || dm[C] == 'y' ) { printf("incorrect dec1 decoupler flags! Should be 'nnn' "); abort(1);} if ( dm2[A] == 'y' || dm2[B] == 'y' ) { printf("incorrect dec2 decoupler flags! Should be 'nny' "); abort(1);} if ( dm3[A] == 'y' || dm3[C] == 'y' ) { printf("incorrect dec3 decoupler flags! Should be 'nyn' or 'nnn' "); abort(1);} if ( dpwr2 > 50 ) { printf("dpwr2 too large! recheck value "); abort(1);} if ( pw > 20.0e-6 ) { printf(" pw too long ! recheck value "); abort(1);} if ( pwN > 100.0e-6 ) { printf(" pwN too long! recheck value "); abort(1);} if ( TROSY[A]=='y' && dm2[C] == 'y' ) { text_error("Choose either TROSY='n' or dm2='n' ! "); abort(1);} if ( HIFI[A] != 'n' && HIFI[A] != 't' && HIFI[A] != 's' ) { text_error("Incorrect HIFI flag! HIFI should be either 'n','t' or 's' "); abort(1);} /* PHASES AND INCREMENTED TIMES */ /* Phase incrementation for hypercomplex 2D data, States-Haberkorn element */ if (phase1 == 2) tsadd(t3,1,4); if (TROSY[A]=='y') { if (phase2 == 2) icosel = +1; else {tsadd(t4,2,4); tsadd(t10,2,4); icosel = -1;} } else { if (phase2 == 2) {tsadd(t10,2,4); icosel = +1;} else icosel = -1; } /* Calculate modifications to phases for States-TPPI acquisition */ if( ix == 1) d2_init = d2; t1_counter = (int) ( (d2-d2_init)*sw1 + 0.5 ); if(t1_counter % 2) { tsadd(t3,2,4); tsadd(t12,2,4); } if( ix == 1) d3_init = d3; t2_counter = (int) ( (d3-d3_init)*sw2 + 0.5 ); if(t2_counter % 2) { tsadd(t8,2,4); tsadd(t12,2,4); } if (HIFI[A]=='t') /* use tilt parameter to define the angle of the tilted plane */ { /* Set up f1180 for HIFI */ tau1 = d2; tau1 = tau1 * cos(tilt*PI/180.0); /* for HIFI f1180 is used for both tau1 and tau2 */ if((f1180[A] == 'y') && (ni > 1.0) && (tilt < 90.0)) { tau1 += (cos(tilt*PI/180.0) / (2.0*sw1)); if(tau1 < 0.2e-6) tau1 = 0.0; } tau1 = tau1/2.0; /* Set up f2180 for HIFI */ t2_counter = t1_counter; tau2 = (t2_counter/sw2) * sin(tilt*PI/180.0); if((f1180[A] == 'y') && (ni > 1.0) && (tilt > 0.0)) { tau2 += (sin(tilt*PI/180.0) / (2.0*sw2)); if(tau2 < 0.2e-6) tau2 = 0.0; } tau2 = tau2/2.0; if(FIRST_FID) { printf("\nEffective spectral widths for %.1f degrees tilt angle:\n", tilt); printf("sw1 = %.2f Hz ; sw2 = %.2f\n", sw1/cos(tilt*PI/180.0) , sw2/sin(tilt*PI/180.0)); } } else if (HIFI[A]=='s') /* use the sw1 and sw2 as is to define the tilted plane */ { /* Set up f1180 for HIFI */ tau1 = d2; /* for HIFI f1180 is used for both tau1 and tau2 */ if((f1180[A] == 'y') && (ni > 1.0)) { tau1 += (1.0 / (2.0*sw1)); if(tau1 < 0.2e-6) tau1 = 0.0; } tau1 = tau1/2.0; /* Set up f2180 for HIFI */ t2_counter = t1_counter; tau2 = (t2_counter/sw2); if((f1180[A] == 'y') && (ni > 1.0)) { tau2 += (1.0 / (2.0*sw2)); if(tau2 < 0.2e-6) tau2 = 0.0; } tau2 = tau2/2.0; if(FIRST_FID) printf("\nTilt angle = %.1f degrees\n", 180*atan(sw2/sw1)/PI); } else /* REGULAR experiment */ { /* Set up f1180 */ tau1 = d2; if((f1180[A] == 'y') && (ni > 1.0)) { tau1 += ( 1.0 / (2.0*sw1) ); if(tau1 < 0.2e-6) tau1 = 0.0; } tau1 = tau1/2.0; /* Set up f2180 */ tau2 = d3; if((f2180[A] == 'y') && (ni2 > 1.0)) { tau2 += ( 1.0 / (2.0*sw2) ); if(tau2 < 0.2e-6) tau2 = 0.0; } tau2 = tau2/2.0; } /* Hyperbolic sheila seems superior to original zeta approach */ /* subtract unavoidable delays from tauCH */ tauCH = tauCH - gt0 - 2.0*GRADIENT_DELAY - 5.0e-5; if ((ni-1)/(2.0*sw1) > 2.0*tauCH) { if (tau1 > 2.0*tauCH) sheila = tauCH; else if (tau1 > 0) sheila = 1.0/(1.0/tau1+1.0/tauCH-1.0/(2.0*tauCH)); else sheila = 0.0; } else { if (tau1 > 0) sheila = 1.0/(1.0/tau1 + 1.0/tauCH - 2.0*sw1/(ni-1)); else sheila = 0.0; } t1a = tau1 + tauCH; t1b = tau1 - sheila; if(t1b < 0.2e-6) t1b = 0.0; t1c = tauCH - sheila; /* Set up constant/semi-constant time evolution in N15 */ halfT2 = 0.5*(ni2-1)/sw2; if(f2180[A]=='y') halfT2=halfT2+(0.25/sw2); CTdelay = timeTN +pwC7 +WFG_START_DELAY -SAPS_DELAY; if (halfT2 > CTdelay) /* if the number of points exceeds the constant time delay use semi-constant time evolution */ { t2b = ((halfT2 -CTdelay)/(ni2 -1)) *t2_counter; t2a = CTdelay -tau2 +t2b; } else /* constant time evolution */ { t2a = CTdelay -tau2; t2b = 0.0; } if (t2a < 0.2e-6) t2a = 0.0; /*** uncomment to check t2a and t2b values printf("%d: t2a = %.12f", t2_counter,t2a); printf(" ; t2b = %.12f\n", t2b); ***/ /* Shift 1H indirect dimension by applying a phase shift to the first 90 pulse on top of States-TPPI */ if (tof1 != tof) { shift = ((tof1-tof)*180.0)/sw1; if (shift < 0.0) shift=shift+360.0; } shift=0.0; /* needs more testing, not used */ initval(t1_counter,v3); initval(shift,v4); mult(v3,v4,v2); /* For ni=0 or 1 set timeAB to 1.5ms to avoid HB HA cancellation */ if (ni <= 1) timeAB=.0015; /* BEGIN PULSE SEQUENCE */ status(A); obsstepsize(1.0); delay(d1); if ( dm3[B] == 'y' ) lk_sample(); /*freezes z0 correction, stops lock pulsing*/ if ((ni/sw1-d2)>0) delay(ni/sw1-d2); /*decreases as t1 increases for const.heating*/ if ((ni2/sw2-d3)>0) delay(ni2/sw2-d3); /*decreases as t2 increases for const.heating*/ if ( dm3[B] == 'y' ) { lk_hold(); lk_sampling_off();} /*freezes z0 correction, stops lock pulsing*/ rcvroff(); obspower(tpwr); decpower(pwClvl); dec2power(pwNlvl); decpwrf(rf0); obsoffset(tof); txphase(one); delay(1.0e-5); if (TROSY[A] == 'n') dec2rgpulse(pwN, zero, 0.0, 0.0); /*destroy N15 and C13 magnetization*/ decrgpulse(pwC, zero, 0.0, 0.0); zgradpulse(gzlvl0, 0.0005); delay(1.0e-4); if (TROSY[A] == 'n') dec2rgpulse(pwN, one, 0.0, 0.0); decrgpulse(pwC, zero, 0.0, 0.0); zgradpulse(0.7*gzlvl0, 0.0005); delay(5.0e-4); if ( dm3[B] == 'y' ) /* begins optional 2H decoupling */ { gzlvl0=0.0; gzlvl3=0.0; gzlvl4=0.0; /* no gradients during 2H decoupling */ dec3rgpulse(1/dmf3,one,10.0e-6,2.0e-6); dec3unblank(); dec3phase(zero); delay(2.0e-6); setstatus(DEC3ch, TRUE, 'w', FALSE, dmf3); } rgpulse(pw, one, 0.0, 0.0); /* 1H pulse excitation */ /* point a */ txphase(zero); decphase(zero); zgradpulse(gzlvl0, gt0); /* 2.0*GRADIENT_DELAY */ delay(5.0e-5); if((t1a -2.0*pwC) > 0.0) delay(t1a - 2.0*pwC); decrgpulse(2.0*pwC, zero, 0.0, 0.0); delay(t1b); rgpulse(2.0*pw, zero, 0.0, 0.0); zgradpulse(gzlvl0, gt0); /* 2.0*GRADIENT_DELAY */ txphase(t3); xmtrphase(v2); delay(5.0e-5); delay(t1c); /* point b */ rgpulse(pw, t3, 0.0, 0.0); zgradpulse(gzlvl3, gt3); xmtrphase(zero); delay(2.0e-4); decrgpulse(pwC, zero, 0.0, 0.0); /* point c */ zgradpulse(gzlvl4, gt4); decpwrf(rf2); delay(timeAB -gt4); simpulse(2*pw, pwC2, zero, zero, 0.0, 0.0); zgradpulse(gzlvl4, gt4); delay(timeAB -gt4); /* point d */ /* ghc_co_nh STOPS HERE */ /* gcbca_co_nh STARTS HERE */ decpwrf(rf1); /* point b */ decrgpulse(pwC1, zero, 2.0e-6, 0.0); obspwrf(tpwr1); obspower(tpwr-6); /* POWER_DELAY */ obsprgon("dipsi2", pwH, 5.0); /* PRG_START_DELAY */ xmtron(); /* point c */ decpwrf(rf0); decphase(t5); delay(zeta - 2.0*POWER_DELAY - PRG_START_DELAY - 0.5*10.933*pwC); decrgpulse(pwC*158.0/90.0, t5, 0.0, 0.0); decrgpulse(pwC*171.2/90.0, t6, 0.0, 0.0); decrgpulse(pwC*342.8/90.0, t5, 0.0, 0.0); /* Shaka composite */ decrgpulse(pwC*145.5/90.0, t6, 0.0, 0.0); decrgpulse(pwC*81.2/90.0, t5, 0.0, 0.0); decrgpulse(pwC*85.3/90.0, t6, 0.0, 0.0); decpwrf(rf1); decphase(zero); delay(zeta - 0.5*10.933*pwC - 0.5*pwC1); /* point d */ decrgpulse(pwC1, zero, 0.0, 0.0); decphase(t5); decpwrf(rf5); if ( dm3[B] == 'y' ) /* turns off 2H decoupling */ { setstatus(DEC3ch, FALSE, 'c', FALSE, dmf3); dec3rgpulse(1/dmf3,three,2.0e-6,2.0e-6); dec3blank(); lk_autotrig(); /* resumes lock pulsing */ } zgradpulse(gzlvl3, gt3); delay(2.0e-4); decshaped_pulse("offC5", pwC5, t5, 0.0, 0.0); /* point e */ decpwrf(rf4); decphase(zero); delay(eta); decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); decpwrf(rf7); dec2phase(zero); delay(theta - eta - pwC4 - WFG3_START_DELAY); /* WFG3_START_DELAY */ sim3shaped_pulse("", "offC7", "", 0.0, pwC7, 2.0*pwN, zero, zero, zero, 0.0, 0.0); decpwrf(rf5); decpwrf(rf5); initval(phi7cal, v7); decstepsize(1.0); dcplrphase(v7); /* SAPS_DELAY */ dec2phase(t8); delay(theta - SAPS_DELAY); /* point f */ decshaped_pulse("offC5", pwC5, zero, 0.0, 0.0); /* xxxxxxxxxxxxxxxxxx OPTIONS FOR N15 EVOLUTION xxxxxxxxxxxxxxxxxxxxx */ zgradpulse(gzlvl3, gt3); if (TROSY[A]=='y') { xmtroff(); obsprgoff(); obspwrf(4095.0); obspower(tpwr); txphase(t4); } decpwrf(rf7); decphase(zero); dcplrphase(zero); delay(gstab); dec2rgpulse(pwN, t8, 0.0, 0.0); /* N15 EVOLUTION BEGINS */ dec2phase(t9); delay(t2a); dec2rgpulse(2.0*pwN, t9, 0.0, 0.0); delay(t2b); decshaped_pulse("offC7", pwC7, zero, 0.0, 0.0); /* WFG_START_DELAY */ decpwrf(rf4); /* PWRF_DELAY */ if (TROSY[A]=='y') { if ((tau2 -gt1 -2.0*GRADIENT_DELAY) > gstab) { delay(timeTN -PWRF_DELAY -pwC4 -WFG_START_DELAY); decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); /* WFG_START_DELAY */ if (mag_flg[A]=='y') magradpulse(icosel*gzcal*gzlvl1, gt1); else zgradpulse(icosel*gzlvl1, gt1); /* 2.0*GRADIENT_DELAY */ delay(tau2 -gt1 -2.0*GRADIENT_DELAY); } else { delay(timeTN -PWRF_DELAY -pwC4 -WFG_START_DELAY -gt1 -2.0*GRADIENT_DELAY -gstab); if (mag_flg[A]=='y') magradpulse(icosel*gzcal*gzlvl1, gt1); else zgradpulse(icosel*gzlvl1, gt1); /* 2.0*GRADIENT_DELAY */ delay(gstab); decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); /* WFG_START_DELAY */ delay(tau2); } } else { dec2phase(t10); if (tau2 > (kappa +PRG_STOP_DELAY)) { delay(timeTN -SAPS_DELAY -PWRF_DELAY -pwC4 -WFG_START_DELAY); decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); /* WFG_START_DELAY */ delay(tau2 -kappa -PRG_STOP_DELAY); xmtroff(); obsprgoff(); /* PRG_STOP_DELAY */ if (mag_flg[A]=='y') magradpulse(icosel*gzcal*gzlvl1, gt1); else zgradpulse(icosel*gzlvl1, gt1); /* 2.0*GRADIENT_DELAY */ txphase(t4); obspwrf(4095.0); obspower(tpwr); /* PWRF_DELAY & POWER_DELAY */ delay(kappa -gt1 -2.0*GRADIENT_DELAY -SAPS_DELAY -POWER_DELAY -PWRF_DELAY); } else if (tau2 > kappa) { delay(timeTN +tau2 -SAPS_DELAY -PWRF_DELAY -kappa -PRG_STOP_DELAY); xmtroff(); obsprgoff(); /* PRG_STOP_DELAY */ decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); /* WFG_START_DELAY */ if (mag_flg[A]=='y') magradpulse(icosel*gzcal*gzlvl1, gt1); else zgradpulse(icosel*gzlvl1, gt1); /* 2.0*GRADIENT_DELAY */ txphase(t4); obspwrf(4095.0); obspower(tpwr); /* PWRF_DELAY & POWER_DELAY */ delay(kappa -pwC4 -WFG_START_DELAY -gt1 -2.0*GRADIENT_DELAY -SAPS_DELAY -POWER_DELAY -PWRF_DELAY); } else if ((tau2 -gt1 -2.0*GRADIENT_DELAY -POWER_DELAY -PWRF_DELAY) > gstab) { delay(timeTN +tau2 -SAPS_DELAY -PWRF_DELAY -kappa -PRG_STOP_DELAY); xmtroff(); obsprgoff(); /* PRG_STOP_DELAY */ txphase(t4); delay(kappa -tau2 -pwC4 -WFG_START_DELAY -SAPS_DELAY); decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); /* WFG_START_DELAY */ if (mag_flg[A]=='y') magradpulse(icosel*gzcal*gzlvl1, gt1); else zgradpulse(icosel*gzlvl1, gt1); /* 2.0*GRADIENT_DELAY */ obspwrf(4095.0); obspower(tpwr); /* PWRF_DELAY & POWER_DELAY */ delay(tau2 -gt1 -2.0*GRADIENT_DELAY -POWER_DELAY -PWRF_DELAY); } else { delay(timeTN +tau2 -SAPS_DELAY -PWRF_DELAY -kappa -PRG_STOP_DELAY); xmtroff(); obsprgoff(); /* PRG_STOP_DELAY */ txphase(t4); delay(kappa-tau2-pwC4-WFG_START_DELAY-gt1-2.0*GRADIENT_DELAY-gstab-SAPS_DELAY); if (mag_flg[A]=='y') magradpulse(icosel*gzcal*gzlvl1, gt1); else zgradpulse(icosel*gzlvl1, gt1); /* 2.0*GRADIENT_DELAY */ obspwrf(4095.0); obspower(tpwr); /* PWRF_DELAY & POWER_DELAY */ delay(gstab -POWER_DELAY -PWRF_DELAY); /* WFG_START_DELAY */ decshaped_pulse("offC4", pwC4, zero, 0.0, 0.0); delay(tau2); } } /* point g */ /* xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */ if (TROSY[A]=='y') rgpulse(pw, t4, 0.0, 0.0); else sim3pulse(pw, 0.0, pwN, t4, zero, t10, 0.0, 0.0); txphase(zero); dec2phase(zero); zgradpulse(gzlvl5, gt5); if (TROSY[A]=='y') delay(lambda - 0.65*(pw + pwN) - gt5); else delay(lambda - 1.3*pwN - gt5); sim3pulse(2.0*pw, 0.0, 2.0*pwN, zero, zero, zero, 0.0, 0.0); zgradpulse(gzlvl5, gt5); txphase(one); dec2phase(t11); delay(lambda - 1.3*pwN - gt5); sim3pulse(pw, 0.0, pwN, one, zero, t11, 0.0, 0.0); txphase(zero); dec2phase(zero); zgradpulse(gzlvl6, gt5); delay(lambda - 1.3*pwN - gt5); sim3pulse(2.0*pw, 0.0, 2.0*pwN, zero, zero, zero, 0.0, 0.0); dec2phase(t10); zgradpulse(gzlvl6, gt5); if (TROSY[A]=='y') delay(lambda - 1.6*pwN - gt5); else delay(lambda - 0.65*pwN - gt5); if (TROSY[A]=='y') dec2rgpulse(pwN, t10, 0.0, 0.0); else rgpulse(pw, zero, 0.0, 0.0); delay(gt2 + 1.0e-4 +gstab - 0.5*pw + 2.0*GRADIENT_DELAY + POWER_DELAY); rgpulse(2.0*pw, zero, 0.0, rof1); dec2power(dpwr2); /* POWER_DELAY */ if (mag_flg[A] == 'y') magradpulse(gzcal*gzlvl2, gt2); else zgradpulse(gzlvl2, gt2); /* 2.0*GRADIENT_DELAY */ delay(gstab); rcvron(); statusdelay(C,1.0e-4 - rof1); if (dm3[B]=='y') lk_sample(); setreceiver(t12); }