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Warning : these figures refer to Tek4 when it was used with a Dutch controller and are for reference only. Tek4 Parameters
Device Identification
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| Chip name | TEK4 |
| Year of manufacture | 1993 |
| Serial number | 1675BR10-04 |
| First light on La Palma | July 1994 |
| Description | Thinned AR coated |
Operational Characteristics
| Speed | Standard | Quick | Turbo | Nonastro |
| Bias(ADU) | 1138 | 1204 | 1192 | 1005 |
| Gain(e/ADU) | 1.16 | 1.63 | 2.58 | 4.42 |
| Noise(e) | 4.0 | 4.1 | 6.0 | 10.2 |
| Linear to(ADU) | 60k | 60k | 40k | 15k |
| Readout time(s) | 95 | 55 | 41 | 30 |
| Vertical CTE | 0.999997 |
| Horizontal CTE | 0.999994 |
Physical Characteristics
| Pixel Scale (JKT imaging) | 0.331 arc/pixel |
| Field of view (JKT imaging) | 5.6 x 5.6 arcmins |
| X Pixel size | 24 microns |
| Y Pixel size | 24 microns |
| X size in pixels of digitised area | 1124 |
| Y size in pixels of digitised area | 1124 |
| X size of useful imaging area | 1024 |
| X start of useful imaging area | 50 |
| Ystart of useful imaging area | 0 |
| LN2 capacity of cryostat | 2.5 litres |
| Cryostat window thickness | 4 mm |
| Distance from window to CCD | 11.4 mm |
| Cryostat window size | 40mm x 40mm |
Operational Parameters
| Flooding type | none |
| Operating temperature | 173K |
| Preferred amplifier | A,D failed 3/95 |
| Network name | CCD4 |
| Anti-blooming available | no |
Measured Characteristics
| Dark current | <6 e/hour |
| Chip flatness | 57 micron convex bow |
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