Yesterday when taking H1 to Observation Mode, Evan & I noticed a RED SDF on video0 (I think it was for PEMEX or EY), but we did not see it on our SDF screens on our work stations.  I reopened the SDF and the RED went away.  The medm was not frozen, because we were Accepting channels & it would go green before noticing this errant PEM RED.  Just thought it was something interesting.