The RDM021 (VME) / RDM201 (PCI) Digital Receiver is an integrated solution consisting of an IF Signal Processor, two Demodulators and Bit Synchronizers contained on a single slot 6U VME card. Available in both VME and PCI form factors, this state-ofthe art module provides a compact, cost competitive, flexible solution to a wide variety of communications link scenarios.

Up to two IF or Subcarrier input signals may be applied to the input selector of the RDM. The input signal selector multiplexer provides 45 dB (typical) of channel isolation thus insuring that only the signal of interest is applied to the IF signal processor. Depending upon specific user requirements, a band-pass or low-pass filter may be installed on the module.

The demodulation process as well as baseband bit synchronization process is totally performed in the digital domain. Signal acquisition is performed by scanning the IF within the programmed acquisition band centered about the selected IF. PM / PSK waveforms are additionally scanned for acquisition at the subcarrier frequency. Once signal acquisition is complete, synchronized signal tracking is performed whereby continuous validation of the lock state is maintained.