The ERO 2000 series encoder sports a very compact design and promises excellent signal quality, high interpolation rates, and reliable thermal position stability. Design types include a scanning unit and two types of scales. The scanning heads come with a 1-Vp-p analog interface with a TTL digital version planned this year with up to TTL x 2000 interpolation as a possibility. Position noise is measured to ±0.04” (arc seconds). The two types of scales contain a 20-micron graduation with a full circle and segment of a circle. For the circular scales, a disk with 2,500 lines per revolution with an outside diameter of 19mm version is now released. Other versions to be released this year include the smallest being 13-mm outer diameter with 1,600 lines, and the largest version will have a 151-mm outer diameter with 23,000 lines per revolution, and various sizes in between. For the segment shaped scale, it has the same graduation of 20 micron, but is lighter in weight as portions of the glass disk have been removed to shape the scale into its rectangular form.