CCD: Low readout noise, or higher clock speed?

Thu, 11/25/2021 - 02:23

The CCD camera I am considering buying for exoplanet work says the following: Typical Readout Noise 9 e- at 500 kHz; 14 e- at 2 MHz

I know that read noise should be minimized, but that would lower the clock speed to 500 KHz.  Is that appropriate for exoplanet work?  What is the best trade-off between clock speed and readout noise for exoplanet work?  

Also, how can I control whether the camera runs at 500 kHz or 2 MHz?   Is there a way to adjust this?  Is it something I can adjust myself?  Or does this have to be set at the factory?

If I choose read noise at the lower end (9 e- at 500 kHz) would that be appropriate for exoplanet work?  Or should I have the camera set to 2 MHz or some other clock speed?

What are the best settings for exoplanet work?  Thanks,

Ed