Dear Bruker Users:
I modified the Bruker p3919gp pulse sequence to select detecting
15N-attached protons with decoupling during acquisition on a 15N-labeled
sample. In the try I got an error message in ACB-Display:
"Status: f3: Amplifier SWR Mismatch. f3: SWR"
and could not figure it out. The error message would be gone if (1) I
marked out "cpd3:f3"; or (2) I set DS=0, NS=1 (the error would appear
after the first scan). The instrument is DMX 600 and software is
XWINNMR 3.1. Any comments and help will be greatly appreciated.
Thanks,
Chunhua Yuan
Campus Chemical Instrument Center
The Ohio State University
------------------------------------------------------------------------
------
;p3919gpf3xf.cy (05/01/20)
;1D f3-filter wth decoupling during acquisition
;using f3 - channel
;water suppression using 3-9-19 pulse sequence with gradients
;
#include <Avance.incl>
#include <Grad.incl>
#include <Delay.incl>
"d11=30m"
"d21=1s/(cnst4*2)"
"DELTA=d19-p21-1.5u"
"DELTA1=d21-p16-d16-p27*2.385-d19*5"
"DELTA2=d21-p16-d16-p27*2.154-p0*0.231-d19*5-4u"
1 ze
2 d1 do:f3
d11 pl1:f1 pl3:f3
3 (p1 ph1):f1
DELTA1 UNBLKGRAD
p16:gp1
d16 pl18:f1
p27*0.231 ph3
d19*2
p27*0.692 ph3
d19*2
p27*1.462 ph3
DELTA
(p21 ph6):f3
3u
(p21 ph8):f3
DELTA
p27*1.462 ph4
d19*2
p27*0.692 ph4
d19*2
p0*0.231 ph4
4u
p16:gp1
d16
DELTA2 pl16:f3
4u BLKGRAD
go=2 ph31 cpd3:f3
d11 do:f3
wr #0
exit
ph1=0
ph3=1
ph4=3
ph6=0 0
ph8=0 2
ph31=0 2
;pl1 : f1 channel - power level for pulse (default)
;pl3 : f3 channel - power level for pulse (default)
;pl16: f3 channel - power level for CPD/BB decoupling
;pl18: f1 channel - power level for 3-9-19-pulse (watergate)
;p0 : f1 channel - 90 degree pulse at pl18
; use for fine adjustment
;p1 : f1 channel - 90 degree high power pulse
;p2 : f1 channel - 180 degree high power pulse
;p16: homospoil/gradient pulse
;p21: f3 channel - 90 degree high power pulse
;p22: f3 channel - 180 degree high power pulse
;p27: f1 channel - 90 degree pulse at pl18
;d1 : relaxation delay; 1-5 * T1
;d11: delay for disk I/O [30 msec]
;d16: delay for homospoil/gradient recovery
;d19: delay for binomial water suppression
; d19 = (1/(2*d)), d = distance of next null (in Hz)
;d21 : 1/(2J)YH
;cnst4: = J(YH)
;cpd3: decoupling according to sequence defined by cpdprg3
;pcpd3: f3 channel - 90 degree pulse for decoupling sequence
;use gradient ratio: gp 1 : gp 2
; 20 : 20
;for z-only gradients:
;gpz1: 20%
;gpz2: 20%
;use gradient files:
;gpnam1: SINE.100
;gpnam2: SINE.100
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