... The AAS consists of four subsystems: the primary fiducial--for beam injection, the UT tilt and shear measurement components (TASM), the BC TASM components, and the secondary fiducial--for quick alignment checks. ... Figure 1. ... 2.2 Unit Telescope Tilt and Shear Alignment Measurement Components Detection and measurement of tilt and shear errors between the UT and the DL/BCR optical axes will take place on the UT's Nasmyth Table (Figure 7). ... AAS Shear Hardware AAS Tilt Configuration a Figure 8. ...

... The design employs a differential structure. ... The input is adapted to 100 differential, and the outputs use standard Low Voltage Differential Signaling (LVDS). ... T/H SINGLE T/H Single Input T/H Single Output 1.35 0.15 0.2 T/H DIFFERENTIAL Input T/H Output T/H 0.1 1.3 0.05 volts volts Figure 5: Digital part and digital gate 0 1.25 -0.05 -0.1 1.2 Integrated Test System A test system is integrated on chip to evaluate the transmission to the data acquisition card (fig: 7). ...