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Satellite Data Distribution and Translation:

Mini-modular Instruments (MMIs) from Pulse Research Lab are deployed in satellite ground stations throughout the world for signal buffering, distribution, translation, and scanning. Combinations of modules have been assembled to implement higher-level functionality, such as a multi-receiver switch matrix with redundancy and fail-over.

In this simple example* a single antenna output is passively split to two demodulators, and the differential NECL outputs of each demodulator are actively fanned out to an ingest path and a monitoring path. A remotely-controlled 2 x 2:1 RF switch selects either the Primary receiver or the Backup receiver, and another NECL fanout sends the selected data stream to two ingest systems. The monitor path provides active 50 Ω/VTT terminations and provides level-shifting for compatibility with standard 50 Ω test equipment.

* In the actual implementation there are two of each module, one for CLK and one for DATA.

Signal Buffering and Distribution: Our most common ground station application is fanout of a single demodulator output to multiple digital receivers, such as ingest systems, logic analyzers, oscilloscopes, etc. Fanout buffers are different from RF splitters (even active splitters) because fanout buffers regenerate clean logic signals.  Popular models include: PRL-434A, 1:4 NECL Fanout Buffer, 4+ GHz PRL-434LP, 1:4 LVPECL Fanout Buffer, 4+ GHz PRL-424LV, 1:4 LVDS Fanout Buffer, 1.25 GHz PRL-414B, 1:4 TTL Fanout Buffer, 130 MHz PRL-430N, 2 Ch. NECL Line Driver/Receiver PRL-431N, 1:2 NECL Fanout Buffer, 3+ GHz PRL-444, 4 Ch. TTL Line Driver with High-Z Input A complete list of models is available on Fanout Buffers page.

Logic Translation: The alphabet soup of digital data standards can be daunting, especially since they are nearly all mutually incompatible. Our second most common ground station application is level translation of digital data streams to/from NECL, CML, RS-422, and 124 Ω ECL, including optional Triax connectors. Popular models include: PRL-425N, Converts LVDS or RS-422 to NECL PRL-426N, Converts NECL to LVDS PRL-422NECL, Converts NECL to RS-422 PRL-450ND, Converts NECL to TTL PRL-420ND, Converts TTL to NECL A complete list of models is available on Level Translators page.

Scanning And Routing: We offer a variety of modules for switching and routing your RF and digital signals from multiple antennae to a single demodulator, from a single demodulator to multiple ingest systems, from multiple channels to a single diagnostic point, etc. Selected modules have 50 Ω/VTT  terminations necessary for measuring/monitoring ECL/PECL/LVPECL signals on standard test equipment. Popular models include: PRL-852A-RM, 2 x 1:2 Switch/Router PRL-854-RM, 1:4 Switch/Router PRL-854N, 1:4 NECL Switch/Router with 50 Ω/VTT Termination/Translation A complete list of models is available on Switches/Routers page.

Thank you for visiting PRL, and please browse the rest of the site for solutions to a variety of pulse, data, and trigger applications.