# Checking offset and error in pulse ID

An LED installed in front of the PSSS camera which runs a sequence (not currently maintained after a power cycle).  To turn on/off sequence:  

- on: `caput SGE-CPCW-73-EVR0:FrontUnivOut0-Ena-SP 1`
- off: `caput SGE-CPCW-73-EVR0:FrontUnivOut0-Ena-SP 0`
![image](uploads/a2830096617e94faa61abf7c38148723/image.png)