The document describes a universal communication simulator called the CS-2500-E. It can: - Generate modulated radio signals across a frequency range of 1-2500 MHz with a resolution of 1 Hz and output power between -100 and 0 dBm in 1 dB steps. - Accept real-time audio input and modulate the RF signals with a variety of analog and digital modulation formats. - Be controlled remotely via TCP/IP through software running on a connected PC, which allows scheduling and replaying of parameter changes. Up to 16 independent RF channels can be created to simulate a realistic radio environment.