Sheila, Kiwamu

We reconfigured most of the GigE cameras such that the analog gain is set to a high value in order to make the process of finding green light easier.

Now green beams as well as objects are quite visible on the cameras. For example, see the attached images below:

The camera image on ITMX looks similar to what Livingston has and therefore I am satisfied with the high gain setting.

(some details)

Sheila and I were having difficulty finding green light in most of the GigE cameras and therefore we had been wondering why they were not as sensitive as those in Livingston.

Looking at the camera initialization files in /ligo/cds/lho/h1/camera/ , we found a type which had been preventing the camera servers from changing the analog gain in its initialization process. In order to set the analog gain, the line should start from 'Analog Gain', but the line in all the files started from 'Default Analog Gain'. So we took out the 'Default' and reconfigured the servers by pressing the 'reload config' button in the medm screens. Due to this typo, all the cameras had been set to a default low gain regardless of what gain were requested in the file. According to the camera code (see camera_server.py in svn), the default analog gain is 100. We increased most of the camera gains to 1023 which is almost 10 times higher than they used to be. I am not sure if this is the highest, but certainly this was the largest number I saw among those files. In addition, changing the gain to some other higher value did not apparently make it brighter. So I guess that it should be already at the highest or close to the highest value. 

Additionally, we found another typo in the initialization file: 'Default Exposure' should be 'exposure' according to camera_server.py. We fixed both typos in all the existing files.