WSO Task Report (WTR) Number: 11 Descriptive Name: Noise in the zeeman signal Initiator: Jeneen Sommers Date Opened: 2001/10/11 13:58 Date Problem Occurred: 2000/10/01 Priority: 2 Serious Status: Closed -------------------------------------------------------------------------------- Description of Problem: The zeeman signal is much noisier than it should be. -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Possible Consequences If Problem Persists: Noisy data. -------------------------------------------------------------------------------- Solution, Possible Solution, or Trouble Shooting Steps: -------------------------------------------------------------------------------- Other Comments: -------------------------------------------------------------------------------- Date Assigned: 2001/10/19 12:17 Actionees: Phil Scherrer Action: Check to see where the noise is coming from, possibly a difference amplifier (?). -------------------------------------------------------------------------- Date Closed: 2002/08/06 09:26 Resolution: Replaced analog switch (DG200) in Magnetograph [part B5, on Schematic page 084] -- this reduced cross-talk between the two signals and reduced moise in Zeeman signal. --------------------------------------------------------------------------