Varian UNITY INOVA NMR, Hardware Installation, Page: 59 / 65

Chapter 6. CRAMPS/Multipulse Module Tests
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UNITY
INOVA Solids Hardware Installation 01-999044-00 C0501
2. Acquire a FID.
3. Display the FID using the
df
command and phase it so that the real channel has no
on-resonance component. This is used later in step 5.
4. Transform the FID and check that the result is an adipic acid spectrum. Note that a
quad image and a large zero spike appear. These are normal!
5. Array
tof
to obtain the best resolution doublet, while keeping all peaks on the same
side of the center spike.
6. Set a cursor on each peak on the right-hand pair and enter
scalesw=sfrq/
delta
to scale the spectrum.
7. Place the cursor on the right-most peak and enter
rl(2p)
to reference the spectrum.
See Figure 30 .
Now you can measure the resolution by measuring the width at half height of either
of the right-hand peaks. You must use the cursors to do the measurement because
dres
gives the wrong result. Save the data for future reference using the
svf(file)
command, where
file
is the name you select for the data file.
Figure 29. CRAMPS Adipic Acid Spectrum Using the MREV8 Pulse Sequence