Hello Ken,
I don't have a TCI Prodigy, but I suspect that you have a cold 2H preamp.
That means that you will have two cables for the 2H channel:
-
A thick cable which probably has an N-type connection to screw to the probe.
This is carrying the "high power" RF from the lock amplifier.
-
A thinner cable with BNC type connections which carry the signal from the cold
preamp back down to the 2H preamp slice beside your magnet.
When you say that you disconnected the lock cable, which one do you mean?
Or did you disconnect both? That could help explain where the oscillation
is coming form.
Bob.
Dr. Bob Berno
Manager: McMaster NMR Facility
Department of Chemistry & Chemical Biology
McMaster University, ABB-156
1280 Main Street West
Hamilton, ON L8S 4L9
(905) 525-9140 ext:24158
Fax: (905) 522-2509
http://macs.mcmaster.ca
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Received on Thu May 30 2024 - 12:02:25 MST