Hello,
unfortunately I am fighting with a funny wobble problem
(to be honest, it is not really funny ...).
There is a
DMX console with
4 FCU
a solid state equipment (especially a 4 quadrant modulator)
a 3 channel SE451
and the further common equipment.
I can measure without any problems using all three
channels of the SE 451 (of course for non protons
only channel 1 and 3 of the SE451).
I can wobble heteronuclei using a small wobble bandwidth
(smaller than 4 MHz). I cannot wobble protons.
If I am using a large wobble bandwith for heteronuclei
or I want to wobble protons, the wobble process starts
with a RG of 8 and decreases the receiver gain down to
1 and terminates with the message, that the wobble
signal is too *strong*.
To locate the problem in a first step I switched off the
tuning signal. In a second step I removed the receiver
cable. But still I get the message, that my - non
existing - signal is too strong.
Apparantly there is no voltage missing. There is a very
weak hint. If I switch off the HPPR by removing the power
cable I am not able to switch on the HPPR by reinserting
the
power cable. To switch on the HPPR again I have to
switch off and switch on the AQR rack.
I have the feeling, that the described problem is due to
a very tiny problem. Unfortunately even after a series
of attempts I have no idea, what the true reason of my
problem could be.
Maybe you already experiences this problem and have
a useful hint for me. ;-)
Best regards
Rainer
Received on Tue Sep 20 2005 - 11:23:14 MST