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5.2 Wideline NMR Tests
01-999044-00 C0501 UNITY INOVA Solids Hardware Installation
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Refer to Figure 15 for the spectral appearance and spectral parameters. Again, the
criteria in step 5 should be observed.
Apply the symmetry test to the two horns. You should be able to see edges at ±200
kHz. (Notice to the left of the pattern is another peak due to aluminium background
that may not phase correctly. Ignore it.)
10. Verify that there is no acoustical ringing at the deuterium frequency using tau1 and
tau2 values of 20 µs. Test the probe with no sample present. Tune the probe to the
deuterium frequency and acquire 16 transients. The spectrum should have a flat
noise baseline with no broad peaks. Refer to
Figure 16 for test parameters and results
with a probe that does exhibit acoustical ringing.
11. The wideline probe does exhibit
23
Na and
27
Al background due to the glass rods in
the coil support. Refer to Figure 17 and Figure 18 for an example of the expected
sodium and aluminum background.
Figure 13. Wideline Spectrum With
compul='y'
1200 1600 kHz 1000 800 600 400 200 0
ACQUISITION SAMPLE PROCESSING FLAGS
sfrq 61.395 date Apr 1 lb 1000.00 il n
tn H2 solvent none sb not used in n
at 0.082 file /vnmr/~ gf not used dp y
np 16384 tests/H2wl awc not used hs nn
sw 2e+06 DECOUPLING lsfid 10 compul y
fb 1e+06 dn H1 phfid 90.0
tof 0 dof 0 wtfile
tpwr 57 dm n proc ft SPECIAL
pw 2.2 fn 65536 temp not used
p1 0
p180 0
d1 10.000 TRANSIENTS werr
tau1 20.0 bs not used wexp
tau2 15.0 ss 0 wbs
nt 16 wnt
ct 0