Troubleshooting guide

Appendix 2: Readout Schematic
FLAMINGOS@2.1-m, Ver. 2.39, 2011 May 13 Page 43 of 46
Figure 7: Array Readout Timing. All 4 quadrants of the array are readout simultaneously; within one quadrant all 8
amplifiers are readout, with pairs of amplifiers multiplexed down into one A/D input. Thus in a frame time of 1.33
seconds 1024 × 256 pixels are readout. The image delivered by MCE4 for a CDS frame is the difference image from two
nondestructive reads of the array; the timing for a CDS frame with integration time of 6 seconds is shown. Note that the
total time to take this frame is 6 + 1.33 seconds, but the net integration time for all pixels is 6 seconds. The case for 3
multiple reads is also shown. For a 6 second integration this takes ~10 seconds. MCE4 delivers the difference image of
the sum of each set of 3 reads. Thus the final image with multiple reads is a coadded image; the pixel values will be 3
times larger than that obtained with a CDS read.