AMMRL: shifting lock display

Ulrich Haunz (Ulrich.Haunz@uni-konstanz.de)
Sat, 16 Feb 2008 13:52:20 +0100 

Hello all,

I read this message from Jack Howarth:

Has anyone seen the following artifact on an Inova console?
I have found that the lock display on our 800 MHz system sometimes
shifts horizontally over time. The lock level and plateau stays
constant, but the amount of zero baseline before the pateau changes.
On occasion, I also see a tailing off appear at the end of the
plateau when this happens. Any idea of what exactly could be
causing this problem with the lock display?
                Jack

------------------------------------------------------------------------------
Jack W. Howarth, Ph.D.                                    231 Albert Sabin Way
NMR Facility Director                              Cincinnati, Ohio 45267-0524
Dept. of Molecular Genetics                              phone: (513) 558-4420
Univ. of Cincinnati College of Medicine                    fax: (513) 558-8474

I had the same problems with our INOVA here in Konstanz - old Germany.
It was a strange hiccup in the system, which generated this nice problem.

Look on your Tuning Box ... is it on the channel "0" - zero?

Set it on "Zero" and then stop the data exchange via ethernet with

su acqproc

then restart the communication board and the MSR-board

wait a bit

then restart the communication between workstation and console via

su acqproc

The nasty thing is ... sometimes the tune box and the channel wheel does not
work properly ... sometimes you tune and match and switch to zero and the
system warns you ... you are in the tuning mode ... wheeling from 0 to 1 and
back ... then this message does not appear  and the experiment starts.

My remedy was, someone switched on channel 1 or something else and I rebooted
and rebooted and rebooted and the sickness was still alive. I changed the
controller board for locking ... the same thing ... A support engineer took
10 minutes and he got the fault ... This could not be serviced via  
telephone ...

I'll hope I can help you a little bit.

I lurk a bit in this group ...

Yours

Ulrich Haunz

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Ulrich Haunz, Dipl.-Ing. (FH)
NMR-Spektroskopie

Raum     L 627, L 710, L 811, L 827
Postfach M 716
Fachbereich Chemie
Universitaet Konstanz

78457 Konstanz

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