This page describe a past problem. The fix has been done , using a functionnality of the SBIG driver that not allow thermal regulation during image download. PRISM V7.2.25

Setup

Problem description

Some random vertical bands add to the normal reading noise of the Camera.
This happens only when the regulation is on and the cooling power is between 1% and 99%.
Bands noise problem disapears at 100% and 0% cooling power.
  • To fix this, is it necessary to switch off the temperature regulation just during the reading of the CCD ?
  • This problem does not appear using CCDSoft or CCDOPT.

    Offset captures with PRISM V7 and thermal regulation at -10°C

    Offset-1.fits Offset-2.fits Offset-3.fits
    Offset-4.fits
    Offset-5.fits
    Offset-6.fits

    Dark 300 seconds captures with PRISM V7 and thermal regulation at -10°C

    Dark300_M10de-1.fits
    Dark300_M10de-2.fits

    Horse Head Nebula 7x5mn=35mn

    CHEVAL_H alpha 7nm.fits