The Model 4423 Digital IF Receiver is an integrated solution consisting of an IF Signal Processor, 3 Demodulators, 2 Bit Synchronizers and 2 Frame Synchronizers contained in a single 2U rack mountable chassis.  This state-of-the art receiver provides a compact, cost competitive, flexible solution to a wide variety of communications link scenarios.  

The Model 4423 is user programmed to select one of two inputs for processing.  The input frequencies within the factory-configured Tunable Center Frequency Band are demodulated.  Depending upon specific user requirements, a choice of up to 4 input band-pass filters are available. 

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 Carrier frequency.  PM / PSK waveforms are additionally scanned for acquisition at the subcarrier frequencies.  Once signal acquisition is complete, synchronized signal tracking is performed whereby continuous validation of the lock state is maintained.

A variety of FEC decoders are available and two fully programmable frame synchronizers are included.

In addition to the Analog output, data may be output via Ethernet (option), TTL, RS-422 data ports.

An Encapsulated data and data quality output may be included that supports the GDP Best Source Selector products.