PECA's HE/MCG Control (Unit 16) is a subsection of PECA's Transmission Medium Impairment Simulator (TMIS) systems.

PECA's HE/MCG (Multi-Carrier Generator) Control provides the means to select and adjust the level of either a typical Headend feed or a Multi-Carrier Generator to be combined with a test signal carrier through the Forward path.

The HE/MCG Control unit contains an attenuator and an 2x1 RF switch, to select either the Headend feed or the MCG.

The MCG feed is split.  One output is routed to the rear panel to fed to the CSO/CTB & CPD Unit 3 and the other output is routed to a port of the 2x1 RF switch.

The HE/MCG Control Unit can be controlled either manually, via front panel controls or via RS-485 interface for computer and automated control.

The computer (automated) control is via an I/O board which are internal to the HE/MCG unit and a PECA RS-485 SmartPlug Module externally connected to the 25 pin D connector on the I/O board.

In a fully integrated test system, the PECA RS-485 SmartPlug Modules are daisy chained via RJ-11 modular cables between units. The chain is connected to an RS-232 to RS-485 converter on the RS-232 COM port of a PC or via PECA Unit 10.