Our Varian unity500 system is giving us fits with the decoupler channel.
Symptom: Running the C13 indirect detection calibration (pwxcal, always
worked in the past), the decoupler (channel 2) does not work (C13
satillites are not inverting) while decoupler2 (channel 3) functions
normally. A proton acquisition with continuous C13 decoupling works on
decoupler2 but not on decoupler. Scoping the signal into the probe,
both decouplers give similiar pulses (freq. and V). I'd like to check
the offset (dof vs. dof2) but I don't know how or where that parameter
is translated into the hardware.
Any suggestions or other ideas are always most appreciated.
Dave.