The HFCS-2000 is a microprocessor-driven training aid that simulates operation of the RACAL R-2174 (P) URR Radio Receiver used by U.S. Government agencies. The HFCS-2000 internally generates Morse code (CW) and Teleprinter (FSK and DFSK RTTY) signals over a simulated spectrum of 0.5 to 30.0 MHz (full tuning range of the R-2174). More than 1,000,000 background signals from ten geographical regions of the world are generated (more than 100,000 per region). In addition, "target" signals may be injected via a serial I/O computer connection. Ionospheric propagation effects, noise sources, and various interference effects may also be selected via the serial I/O port.

The HFCS-2000 is designed to be used in a multi-station training situation wherein many receiver simulators are driven by an instructor's computer via a Local Area Network (LAN). When time-coordinated through the computer network, each HFCS-1000 in the classroom is synchronized so that each student receives the target text at the same time and frequency. This assures an accurate and fair assessment of each student's performance.

HFCS-2000 external connections include AC power, RS232 serial I/O port, and three audio outputs (headphone, speaker, and constant level line). The HFCS-2000 is constructed in modular form to assure rapid and simple repairs. The HFCS-2000 may be manufactured in either commercial or TEMPEST (NACSIM 5100A) versions.