== P1.9	Check the working of the internal tip-tilt loop == 
•	**Phase**		:	2  
•	**Status**		: 	Draft	 
•	**Category**		: 	Unpack, Assemble, and Verification (C1)???
•	**Recurrence**	: 	once at commissioning
•	**Duration**		: 	1 day
**Description**
•	Check the working of the internal tip-tilt loop using calibration unit light sources, C-RED2, and ALPAO-DM.

**Prerequisites**
•	SCICAM cooled down.

**Procedure**
•	Run the internal tip-tilt loop routine for different brightness of the source (star).
* Check its efficiency in keeping the PSF at the C-RED2 hot-pixel.
* Save data to repository and analyze them.

**Success criteria**
* Internal tip-tilt routine works fine and the PSF ar C-RED2 is stable within the required precision.
•	All the data and analysis saved in the repository.
**Notes**

**LBTO support**
* Liquid Nitrogen refill is required in the cleanroom.
**Associated SHARK-NIR personnel**

**Date performed and by whom**

**Comments**