No signal when taking data with FSI

No signal when taking data with FSI

Check Alignment

Select Focus Mode (no sweep) and acquire an image. This removes any fast timing issues. Also turn the gated cathode to Normally ON. In more detail:

  1. From the CCD tab, go to the System Mode dropdown and select “Focus”.
  2. Set CCD Mode to “Fast Focus Mode”.
  3. Change the trigger (SRS box) from single shot to 0.5 Hz.
  4. Acquire a background image (CCD → Acquire to B).
  5. Select CCD → Acquire Continuously, Forever, 0 seconds.
  6. Input optics can now be aligned, with visual feedback at 0.5 Hz.

Check Timing

Select Sync Mode.

  1. Does the signal “pile up” at the starting point?   If so, the ramps are firing too late relative to the signal.
  2. Does signal appear to the right of starting point, or no signal at all? If so, the ramps are firing too early relative to source.