| Telescope | Tuorla 70cm f2.5 Schmidt-Vaisala |
| Date | 3/2004 |
| Instrument | SBIG - ST 8 |
| Filter | N/A |
| Exposure Time |
0 sec (bias frame) |
| Other | Bias Frame |
Problem:These two bias frames (0 sec exp time) show banding features due to electronic interference. Such banding always occured when the telescope and/or the dome were moved during readout. The problem was a result to insufficient shielding of the cables which caused interference between the motors of the telescope and dome and the CCD readout electronics. |
Fix:The easiest fix is to simply not move the telescope or dome during the readout. If the problem persists regardless of dome or telescope motion, most likely the shielding of the cables is inadequate which is a much more involved fix. |