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DirectLink Receiver/ Demodulator

DirectLink Receiver/Demodulator

Signal Engineering's DirectLink is a Receiver/Demodulator component within a GOES Direct Readout Ground Station (DRGS).

The DirectLink Receiver/Demodulator is designed to process signals at all three GOES DCS baud rates 100, 300 and 1200 bits per second. Multiple channels are processed simultaneously including the Pilot tone which is used as a reference in determining the uplink EIRP of each DCP transmission and the DCPs operating frequency accuracy.

Currently, Signal Engineering provides a 4-channel, 6-channel and 16-channel DirectLink Receiver/Demodulator. Two additional channels are processed in each case to monitor the Primary and Secondary Pilot tone signals. Each channel's baud rate can be independently selected allowing the system to be tailored by the user for their specific networks of DCPs.

The  DirectLink Receiver allows you to support the older 100 BPS DCPs simultaneously as you migrate to the Higher Data Rate DCPs. Multiple DirectLink Receivers can operate in parallel to expand the number of channels the user wishes to monitor. Each DirectLink Receiver is totally independent of all the others possessing its own digitizer and its own pilot tone tracker. This adds a great deal of redundancy to multiple receiver systems.

Output from the DirectLink Receiver/Demodulator consists of time stamped data accompanied with quality measurements on each received message, DCP identification codes, on-line built-in-test diagnostic information and other useful data which can be used by the operator to access the health of individual DCP stations.

Key Features of the Signal Engineering GOES DirectLink Receiver/Demodulator

  • Supports NESDIS HDR 100, 300 and 1200 BPS transmissions from any NESDIS certified transmitter
  • Each channel’s data rate is independently assigned by the user
  • Channels can be reassigned in a dynamic frequency hopping manner
  • Automatic Dual Pilot Tone Tracking
  • Backup Pilot Tone serves as reference if Primary Pilot goes down
  • Automatic Signal Gain Control
  • Inherent redundancy in Multiple Receiver systems
  • Data output via an RS-232 interface or a TCP/IP (Ethernet) interface. Data and Alerts on TCP/IP interface in accordance with DAMSNT specification
  • Enhanced quality monitoring for all received messages
  • Embedded DSP operating system which is free of regular OS updates
  • Available in Desk top (7” x 9” x 2.5”) or 19-inch rack (2xRU) mountable configurations

For detailed technical information, please contact us.


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