Dear colleagues:
Big thanks to all who responded my request for suggestions about the
BSMS Shim CPU change problems. Most suggested to do cf and cfbsms. With
the new CPU board, I did rsh, then cf followed by cfbsms, then asl. I
did get the sweep signal and get it lock easily. Then I save config
under BSMS keypad. At this point, my problem was solved.
However, the bsms board keep showing the message " BSMS TIME OUT Press
STD BY" even the signal was locked. After pressing STDBY, the board is
showing "booting...connecting..." and then lock was lost again, and
sweep is on. The bsms board then still keeps showing the message " BSMS
TIME OUT Press STD BY". So I have to change back to the old shim CPU
board. With the old board, I also get the " BSMS TIME OUT Press STD BY"
message. I wonder anyone has encountered this problem? What's the
possible cause for this? I am using Xwinnmr 2.6. on 400 MHz Bruker
Advance DMX.
Best regards,
Yunqiao
P.S. I put all responses to my previous request below :
If you have changed frequency as you indicate, you will need to run the
cfbsms command as many times as necessary until you get the "set
absolute lock frequency" message with the old lock freq. and the new
lock freq. For some reason the BSMS always reboots to the original
absolute lock frequency which in your case would be wrong.
----------------------------------------
I would suggest putting in doped water and finding the correct
frequency. Also be sure "drift comp" is not on and changing the field
excessivly during the run. When you find the correct "field" value make
certain you are not on a sideband. Then be sure " save config" on the
bsms keypad under the service menu/ the pasword to unlock the bsms
control is 341964. Otherwise you will keep reloading the old value. Then
execute the "asl" command Once that is all done reshim on the lineshape
sample and reset the "field" value using "CDCL3"
If these instructina are not clear I could provide more detail or call
Bruker apps hotline at 978.667.9580 ext 5444
-------------------------------------------
It may be that you have to do the cf command now. This is because your
BSMS board did not have the correct lock shift. If you do this and at
the end be sure that in the nuclei table you have the correct SF for 1h
inputted then click restore and then save. Immediately after finishing
the cf do cfbsms in the nmr program. This should help if this is indeed
the issue.
---------------------------------------------
Have you done a cf command in xwinnmr to set the spectrometer to 400.13
Mhz 1H basic frequency? If it is set to 400.06 and was 400.13, this
will create a 2D frequency that is too far from where it should be for
your field to observe a lock signal. How come the basic 1H freq has
been changed anyway???
-------------------------------------------
Are using TOPSPIN?
The latest version looses the correct user mode for the BSMS unit. It
should be user "1". This might cause such problems. We were puzzled by
the fact that TOPSPIN in comparison to XWINNMR does not allow to write
shimfiles during on-going acquisition.
________________________________
From: Yunqiao Pu [mailto:Yunqiao.Pu_at_ipst.gatech.edu]
Sent: Tuesday, August 15, 2006 10:46 PM
To:
Subject: AMMRL: Change the BSMS Shim CPU
Dear AMMRLers:
Recently the lock signal in our 400 MHz Bruker Advance DMX has been
keeping lost after locking for couple of hours, and got the message "
BSMSInitial value lost, restore with rsh command" . We did rsh, but we
got the lock signal lost again and the same message appears. We then
thought it might be due to the bad shim CPU, so I got a new shim CPU
from Bruker. After putting the new shim CPU in, can't get any lock
signal, meaning no any deuterium signal detected by the machine.
Messages like " Caution: lock frequency ", "E:60 BSMS Timeout " appear.
I know our machine is at 400.13 MHz originally and now at 400.06 MHz. I
did "asl" command, but still failed to get any lock signal.
I was wondering if anyone here has any suggestions? I would very much
appreciate your help.
Sincerely,
Yunqiao Pu
--------------------------
Yunqiao Pu, Ph.D
Institute of Paper Science and Technology
Georgia institute of Technology
500 10th St.
Atlanta, GA 30332
Received on Fri Sep 08 2006 - 12:49:53 MST