%
% tracks axis timing change in the process of
% building a larger map of the traveled area
%
_Scope.Trigger
{
%
% within the process of getting a frame to build the
% background bitmap
%
 _Scope.PreTimed
 {
%
% a change was marked and the initial waiting period
% was enacted
%
  basenow _Scope.PreTime sub 1000 gt
  {
%
% past the initial delay before a trigger can be handled
%
   _Scope.PostTimed
   {
%
% have already captured, now check for past hold time
%
    basenow
%%%"postn" log)(
    _Scope.PostTime sub 1000 gt
    {
%
% the hold time after capture has been observed,
% commit the captured reserve frame to the background
% bitmap being built
%
     @Micros
     *scopsiph
     false !Scope.PreTimed
     false !Scope.PostTimed
     true !Scope.Series
     "Siphon" 0xFFE050E0 @!Lmode
%%%"triged" log#
    }
    {
%
% still waiting for capture acknowledge
%
     @Micros
     @_Siphon
%%%"siph" log)(
     {
%
% scope has not captured yet
%
      basenow !Scope.PostTime
     }
     {
%
% capture complete, will wait for standoff after capture
%
     } ifelse
    } ifelse
   }
   {
%
% have not yet captured, capture and hold the video frame
%
    basenow
%%%"cap" log)(
    !Scope.PostTime
    true !Scope.PostTimed
    @Micros
    true @!Siphon
    "Siphon" 0xFF3050E0 @!Lmode
   } ifelse
  }
  {
%
% waiting for standoff after initial frame allow
%
  } ifelse
 }
 {
%
% still waiting for initial frame allow
%
 } ifelse
}
{
%
% not in process for building the background bitmap
% no demand for a capture to build base view
%
} ifelse