low sensitivity (Bruker)

Quincy Teng (teng@sunchem.chem.uga.edu)
Tue, 25 Feb 1997 09:47:12 -0400

Dear AMMRL Colleagues -
We have problems with the sensitivity of our Bruker amx-400 instrument. I
can obtain weak fid only when using the maximum receiver gain (32K). The
fid signals are very weak for both proton and carbon using both BB and
inverse probes. I have swapped preamp (1H and 13C), SE451, PTS interface
board and the receiver cable. The 90 degree pulse width is okay and
ecoupler output power is normal.
Does anyone have suggestions what could cause this problem? If there is
interest in this question I will post a summary of responses to the group.
Thank you very much in advance for all your help.

Please reply to teng@sunchem.chem.uga.edu.

Quincy Teng
University of Georgia