We cabled the Dead time in the scaler.
We have a 100Hz pulser (entry 2 of U2M) in coincidence with the DT output of the GMT (entry 1), giving a direct reading of the dead time.
Note on MUST2 dead time:
- Without zero suppression the dead time caused by MUVI is 2ms. So this give a 40% DT at 180 counts per second.
- With zero suppression, the DT fall down to 240us (80us cash in to interrupt the CPU and, 80us to process the signal from MUVI to CAS and 80us to send the parameter back to the back plane). So this give a 5-7% DT with 180 counts per second.
- The ADC works in parallel of MUVI, so the DT are not cumulative. |