Some approximate readout times are indicated in the table below.
For more info on the FIES detector: CCD13
Amplifier
Binning
Read-out time (sec)
A or B (single)
1x1
90
A or B (single)
2x2
30
A and B (dual)
1x1
45
A and B (dual)
2x2
15
Notes:
The default readmode uses the B amplifier.
The A and B amplifier gains and bias levels are not exactly equal, but proper spectral reduction for AB-mode dual readout is possible.
For Xbin=2 together with AB-mode dual readout the two central CCD
columns are not recorded in the image: the central echelle order
(around 4450-4550Å) is difficult to reduce, and spectral
coverage may have a gap in this order.
Default binning is 1x1, however for the low-res fiber (R=25000) we advise to use 2x2 binning.
