PTC consists of two compressors C1 and C2 mounted back to back to achieve a cooling effect by removing the heat load. Two types
of heaters are mounted at the cold tip of PTC in order to simulate the load to the PTC. One heater generates a constant heat load and
another heater derives variable power from CDEU. At any given time, only one heater is powered for characterizing Cryo-cooler
system. CDEU delivers sinusoidal drive to both compressors C1and C2. The drive can be programmed for parameters like voltage,
phase, offset and frequency Ref [1]. CDEU monitors voltage, current and frequency, temperature of the cold tip and pressure of the
gas in both compressors. The software mainly consists of various requirements for operation of CDEU. CDEU is a remote terminal to
TCP. TCP is the bus controller.
