QHYCCD

QHY268M gain numbers vs gain graphs

QHY268M gain numbers vs gain graphs
« on: May 07, 2021, 06:59:06 AM »
Dear Qiu,

I may have started this topic in the wrong category, so I ask it here
as I think it needs someone who knows the ins and outs of the camera to answer my question.

Can you pls inform about the relationship of the
Gain used in the graphs (0 - 100)
and
the digital number the gain can be given in e.g. the setup window (0 - 339)

Does the gain number in the graphs represent a percentage ?
Is the number 339 equal to 100 % or to 339 % ?

If 339 equals 100 %
then putting gain = 30 in NINA is only about gain = 8.8%

Can you pls provide the correlation between both percentage and the gain number we enter in e.g. NINA

Thank you very much.
Johan

llsong

  • *****
  • 159
    • View Profile
    • Email
Re: QHY268M gain numbers vs gain graphs
« Reply #1 on: May 10, 2021, 03:27:38 AM »
Dear Johan

The gain 0-100 in the figure is equal to the actual value set in the software, because the gain curve above 100 has not been tested theoretically, because the parameters behind the analog gain are of little significance. It is recommended to use a gain of 0-100 for setting.

Re: QHY268M gain numbers vs gain graphs
« Reply #2 on: May 10, 2021, 12:47:18 PM »
Thank you.

b rgds,
Johan