This board allows for the reading of a 1Vpp sine wave encoder. Low-noise differential input circuits and a mediation algorithm built int the firmware allow for high stability and rerpeatability of the measurement points. Thanks to the sophisticated interpolation algorithm resolutions of up to 2048x can be obtained, meaning that the base period of the encoder is divided in 2048 parts. For example, if using a 5000 graduations per rotation, a resolution of 5000x2048 (more than 10millions!) impulses per rotation would be obtained.

The on-board firmware, running on a DSP, can level the amplitude differences of the input sinusoidal signal in order to obtain the maximum accuracy on all the 360° of rotation of the encoder. Similarly, if a optical scale is connected to the board, the firmware applies a local correction to the amplitude of the "sin" and "cos" signals in order to always interpolate the position inside the electric period with the maximum accuracy.

Zero signals both analogic and digital che be handled. In the case of analogic zero signals (i.e. Heidenhain encoders) tha calibration can be executed until the endo of the threshold level, in order to obtain the maximum reliability while zeroing at speeds both high and low. The 6 digital "latch" inputs present on the board allow to "freeze" the value read by the encoder and memorize it. This means that the values read from the axis boards are sinchronized. The 5V required power is supplied by the "Master" board, to which the Can-Bus data channell is also to be connected. The board's design is compact so it can be installed inside the tubes that make up an articulated-arm measurement machine.

Sinai's sine wave encoder boards are used by leading CMMs producers for their accuracy and reliability.