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E2V CCD#8 Read out times:


The tables 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

200 Kpix/sec (default)
Readout times (in seconds) for 200Kpixels/sec read out rate.
The read out noise is about 12 ADU (3.9 e-)
Windowbin 1x1bin 2x2
full frame 2148x205224.5 9.0
ysize full 2052:
xsize 102415.0 6.5
xsize 512 11.0 5.5
xsize 256 8.5 5.0
xsize 128 7.5 5.0
xsize 64 7.0 4.5
xsize 32 7.0 4.5
xsize full 2148:
ysize 102413.5 6.0
ysize 512 8.0 4.0
ysize 256 5.0 3.0
ysize 128 3.5 2.5
ysize 64 3.0 2.5
ysize 32 2.5 2.5
ysize = xsize:
10249.0 4.5
5124.5 3.0
2563.0 2.5
1282.5 2.5
642.5 2.5
322.5 2.5

100 Kpix/sec
Readout times (in seconds) for 100Kpixels/sec read out rate.
The read out noise is about 11 ADU (3.5e-)
Windowbin 1x1bin 2x2
full frame 2148x205241.5 13.5
ysize full 2052:
xsize 102423.0 5.5
xsize 512 14.5 6.5
xsize 256 10.5 5.5
xsize 128 8.5 5.0
xsize 64 7.5 4.5
xsize 32 7.0 4.5
xsize full 2148:
ysize 102422.0 7.5
ysize 512 12.0 5.0
ysize 256 7.5 3.5
ysize 128 4.5 3.0
ysize 64 3.5 2.5
ysize 32 3.0 2.5
ysize = xsize:
102412.5 5.5
5125.5 3.5
2563.5 2.5
1282.5 2.5
642.5 2.5
322.5 2.5

400 Kpix/sec
Readout times (in seconds) for 400Kpixels/sec read out rate.
The read out noise is about 17.5 ADU (5.7 e-)
Windowbin 1x1bin 2x2
full frame 2148x205213.5 6.0
ysize full 2052:
xsize 102410.0 5.5
xsize 512 8.0 5.0
xsize 256 7.5 5.0
xsize 128 7.0 4.5
xsize 64 6.5 4.5
xsize 32 6.5 4.5
xsize full 2148:
ysize 10248.0 4.0
ysize 512 5.5 3.5
ysize 256 4.0 2.5
ysize 128 3.0 2.5
ysize 64 2.5 2.5
ysize 32 2.5 2.5
ysize = xsize:
10246.0 4.0
5124.0 3.0
2563.0 2.5
1282.5 2.5
642.5 2.5
322.5 2.5

800 Kpix/sec
Readout times (in seconds) for 800Kpixels/sec read out rate.
The read out noise is about 30.6 ADU (9.9e-)
Windowbin 1x1bin 2x2
full frame 2148x20529.5 5.5
ysize full 2052:
xsize 10247.5 5.0
xsize 512 7.0 4.5
xsize 256 6.5 4.5
xsize 128 6.5 4.5
xsize 64 6.5 4.5
xsize 32 6.5 4.5
xsize full 2148:
ysize 10246.0 3.5
ysize 512 4.0 3.0
ysize 256 3.0 2.5
ysize 128 2.5 2.5
ysize 64 2.5 2.5
ysize 32 2.5 2.5
ysize = xsize:
10244.5 3.5
5123.5 3.0
2563.0 2.5
1282.5 2.5
642.5 2.5
322.5 2.5