The BMCD54 is a 3-channel C-band indoor tracking downconverter. It contains a two stage downconverter in all channels. The channels are operated from common local sources which have very good spectral purity. The converter channels are equipped with phase and amplitude control elements in order to achieve very good phase and amplitude balance between the channels. The downconverter can be controlled and monitored via front panel keyboard and display or remotely via Ethernet (IP protocol) or RS422.