Specifications

Model G2-4000
Gain 1.0 e-/ADU (all binnings)
System read noise 7 e- (LN read)
10 e- (Standard read)
Full frame download 6.8 s (LN read)
5.7 s (Standard read)
System read noise depends on the particular CCD detector. For instance KAF-
0402 or KAF-1603 CCDs can be read with 11 11 e
-
RMS, read noise of the
KAF-3200 CCD can be less than 6 e
-
RMS.
Download times are valid for cameras of revision 3 and newer. Download times
for cameras of revision 2 was approx. 2 times longer and for cameras of
revision 1 almost 2.5 times longer.
Download times are valid for USB 2.0 host and may vary depending on host
PC. Times stated here were measured on 1.5 GHz Pentium M based laptop
computer.
CCD Chip Cooling
Regulated two-stage thermo-electric cooling is capable to cool the CCD chip up
to 50 °C below ambient temperature. The Peltier hot side is cooled by a fan.
The CCD chip temperature is regulated with ±0.1 °C precision. High
temperature drop and precision regulation ensure very low dark current for long
exposures and allow image proper calibration.
The camera head contains two temperature sensors – the first sensor measures
directly the temperature of the CCD chip. The second one measures the
temperature of the air cooling the Peltier hot side.
The cooling performance depends on the environmental conditions and also on
the power supply. If the power supply voltage drops below 12 V, the maximum
temperature drop is lower.
CCD chip cooling Thermoelectric (Peltier modules)
15