The velocity generated by PC-TCS’s proprietary servo control software is based on positional feedback information gleaned from incremental or absolute encoders. A precision crystal controlled oscillator provides time hacks via system interrupts for accurate servo loop control and system time keeping.

External inputs from the telescope control paddle, limits detection circuitry, and Hard Stow switches can be read by PC-TCS via I/O interface cards which also provide TTL output control capabilities for dome, focus and optional user defined TTL driven functions.

Together, the DC Servo velocity loop along with encoders and the PC-TCS/DCS software provide a closed loop servo system capable of meeting and or exceeding the requirements of even the most demanding astronomical observing program. PC-TCS handles all slews from target to target, tracking at sidereal and non-sidereal rates, pointing and tracking corrections including Periodic Error Corrections (for worm wheel driven systems), communications with external computers and ancillary telescope related hardware, all bound together by a convenient and efficient user interface designed for productivity in all astronomical applications.