RTL-DR70 RT Logic Digital Receiver PMC

The Kratos / RT Logic RTL-DR70 Digital Receiver PMC supports multiple IF and baseband telemetry processing functions. The digital processing is implemented in firmware, allowing the board to be easily tailored to specific customer requirements. The RTL-DR70 provides a versatile digital receiver for satellite ground, spacecraft test, and range/flight test applications. RT Logic has developed a full range of commonly used firmware and software personalities.

The RTL-DR70 provides a reconfigurable, digital platform for IF (70 MHz) and baseband processing functions. The PCI Mezzanine Card (PMC) is designed for use in PCI, cPCI, and VME systems. A small, shielded analog section on the board filters the IF input, provides automatic gain control, and generates 14-bit digital samples of the received signal. The signal samples are processed by multiple on-board Field-Programmable Gate Arrays (FPGAs) that provide nearly two million logic gates for the downloaded firmware. In addition to the IF input, the RTL-DR70 accepts a 5 or 10 MHz reference input, generates a baseband output, and has multiple TTL/RS-422 signal lines to support a wide variety of external interface configurations. RT Logic provides firmware personalities for the RTL-DR70 that support PSK and PM carrier demodulation, subcarrier B/QPSK demodulation, bit synchronization, and Viterbi decoding. For example, the RTL-DR70 can simultaneously process two SGLS telemetry subcarriers modulated on the main carrier and generate the two bit synchronized data/clock outputs.