E2V CCD#8 Read out times:
The table below contain readout times for different setups and readout speeds of the CCD.
The four readout speeds offered are: 200 (default), 100, 400, and 800 Kpixels/sec.
Note : For every command you issue (exp, mexp) add an additional overhead of 2 seconds.
Note : One pixel corresponds to about 0.19 arcsec.
Examples : Total time spent for a full frame, bin 1x1, mexp 10 5 command at 200 Kpix/sec readout speed:
2 sec overhead for mexp command + (10 sec integration + 24.5 sec readout time) x 5 exposures = 174.5 sec
Total time spent for a full frame, bin 1x1, 5 times exp 10 command at 200 Kpix/sec readout speed:
(2 sec overhead for exp command + 10 sec integration + 24.5 sec readout time) x 5 exposures = 182.5 sec
Window | 100 kpxl/s | 200 kpxl/s | 400 kpxl/s | 800 kpxl/s |
| bin 1x1 | bin 2x2 | bin 1x1 | bin 2x2 | bin 1x1 | bin 2x2 | bin 1x1 | bin 2x2 |
full frame 2148x2052 | 41.5 | 13.5 | 24.5 | 9.0 | 13.5 | 6.0 | 9.5 | 5.5 |
ysize full 2052: |
xsize 1024 | 23.0 | 5.5 | 15.0 | 6.5 | 10.0 | 5.5 | 7.5 | 5.0 |
xsize 512 | 14.5 | 6.5 | 11.0 | 5.5 | 8.0 | 5.0 | 7.0 | 4.5 |
xsize 256 | 10.5 | 5.5 | 8.5 | 5.0 | 7.5 | 5.0 | 6.5 | 4.5 |
xsize 128 | 8.5 | 5.0 | 7.5 | 5.0 | 7.0 | 4.5 | 6.5 | 4.5 |
xsize 64 | 7.5 | 4.5 | 7.0 | 4.5 | 6.5 | 4.5 | 6.5 | 4.5 |
xsize 32 | 7.0 | 4.5 | 7.0 | 4.5 | 6.5 | 4.5 | 6.5 | 4.5 |
xsize full 2148: |
ysize 1024 | 22.0 | 7.5 | 13.5 | 6.0 | 8.0 | 4.0 | 6.0 | 3.5 |
ysize 512 | 12.0 | 5.0 | 8.0 | 4.0 | 5.5 | 3.5 | 4.0 | 3.0 |
ysize 256 | 7.5 | 3.5 | 5.0 | 3.0 | 4.0 | 2.5 | 3.0 | 2.5 |
ysize 128 | 4.5 | 3.0 | 3.5 | 2.5 | 3.0 | 2.5 | 2.5 | 2.5 |
ysize 64 | 3.5 | 2.5 | 3.0 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
ysize 32 | 3.0 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
ysize = xsize: |
1024 | 12.5 | 5.5 | 9.0 | 4.5 | 6.0 | 4.0 | 4.5 | 3.5 |
512 | 5.5 | 3.5 | 4.5 | 3.0 | 4.0 | 3.0 | 3.5 | 3.0 |
256 | 3.5 | 2.5 | 3.0 | 2.5 | 3.0 | 2.5 | 3.0 | 2.5 |
128 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
64 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
32 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
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