Communication Systems

Satellite Test Equipment

Satellite Link Emulator (SLE900)

Satellite Link Emulator (SLE900)

The SLE900 provides wider bandwidth, improved noise floor, and also adds optional AWGN and multipath fading with up to 6 taps per channel. The instrument can be configured with 1 to 4 channels. There are three RF bandwidths currently available: 72MHz bandwidth centered at either 70MHz or 140MHz, 125MHz bandwidth centered at 140MHz, and 250MHz bandwidth centered at 1200MHz.

Link impairments include delay, Doppler, attenuation, phase offset, AWGN, and multipath. Parameters can be set to fixed values in static mode, or continuously changed in real time in the dynamic mode without any phase discontinuities. Ephemeris data files are downloaded via an ethernet connection and stored internally in solid state memory. These dynamic files can have playback rates from 1 Hz to 1000 Hz, and can be run forward, reverse, continuously looped, or single stepped.

Remote control can be accomplished by making calls from the test software, or by using the SleControl application program provided with the instrument. This application provides control of all SLE functions, as well as manipulation of the dynamic data files.


  • Satellite ground equipment testing
  • Payload testing
  • Testing complex links with both space and terrestrial effects
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