i like this post (click again to cancel)
1
i dont like this post (click again to cancel) remove favorite mark from this question (click again to restore mark)
1

I've been trying to find a way to acquire NMR data on a UnityPlus system with 20, 30 40 degrees and no the standard ones. Can I choose the receiver phase to other values different than 90 degree increments?

asked Aug 07 '09 at 13:44

Federico%20del%20Rio's gravatar image

Federico del Rio
36

updated Nov 18 '09 at 14:29

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
5471


One Answer:
i like this answer (click again to cancel)
1
i dont like this answer (click again to cancel)

Hi Frederico,

You can easily introduce any phase shift on the pulse phases using the "obsstepsize" and "xmtrphase" command (see below). So in principle you can shift all phases on the obs channel in the opposite direction to get the desired effect. I don't know if the command also works on the receiver only if you set the phaseshift right before the acquisition and reset it at the beginning of your sequence - just give it a try (can't try it myself since I don't work with Varian machines any more).

   obsstepsize(1.0);
   xmtrphase(v10);
   rgpulse(pw,v1,rof1,0.0);
   xmtrphase(zero);

just set v10 to the desired phase, v1 can be a 90deg incremented phase cycle on top of your small phase shift) - alternatively you can use obsstepsize(10.0); and v10=2,3,4 for 20,30,40 degr.

link

answered Aug 10 '09 at 15:00

ameiss01's gravatar image

ameiss01
16

Your answer
Please start posting your answer anonymously - your answer will be saved within the current session and published after you log in or create a new account. Please try to give a good answer, for discussions, please use comments and please do remember to vote (login to vote)
toggle preview

powered by CNPROG