The Model 4460 Single Channel Digital Receiver is housed in a 10.75 x 12 x 1.75 inches high chassis. This lightweight portable unit is powered by a standard laptop power supply. It may also be run from a standard laptop external battery unit. This unit is an integrated solution consisting of an RF Signal Processor, 2 Demodulators, 2 Bit Synchronizers and 2 Frame Synchronizers (Pattern Detectors) contained on a single slot 6U VME/PCI card. This state-of-the art module provides a compact, cost competitive, flexible solution to a wide variety of communications link scenarios.
The Model 4460 processes 3 RF Bands: S Band, 2185 MHz to 2485 MHz; Upper L Band, 1700 MHz to 1850 MHz; and Lower L Band 1427 MHz to 1545 MHz (other frequencies available). Depending upon specific user requirements, a choice of 4 IF filters are available.
The demodulation process, as well as the 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 for pattern detection.
Data is output via Byte aligned Ethernet (optional), TTL or RS422 ports. The unit supports an optional Ethernet output mode by which frame synchronized byte aligned data can be transported. UDP/IP transport is provided for raw data and, optionally HDLC/AX.25mdata. IRIG-106 Chapter 10 compatible output is also available.
An Encapsulated data and data-quality output may be included that supports the GDP Best Source Selector products.