PECA's Ghost Simulator Unit (Unit 12) is a subsection of PECA's Transmission Medium Impairment Simulator (TMIS) systems.

PECA's Ghost Simulator provides the means to route a test carrier through an HP Dynamic Ghost Simulator Model 11759D and compensates for the insertion loss of the 11759D.

The Ghost Simulator 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 Ghost Simulator 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.