The Constellation CMDL-1 L-Band Downlink Module integrates a high gain broadband distribution amplifier, LNB power insertion, 22 kHz, and 10 MHz reference clock into a single Constellation CMDL-1 module. The Constellation CMDL-1 Downlink Module plugs into any Constellation chassis which provides the module with fully redundant DC power, and reference clock. The Constellation CMDL-1 Downlink Module is hot swappable and can be replaced in less than a minute. The Constellation CMDL-1 Downlink Module amplifier gain and reference output levels are easily adjusted at the front of the module. Output voltage is selectable at the rear of the module. Both voltage and 22 kHz can be independently enabled or disabled at rear of the module.