Emulator for Evaluating Satcom Performance
dBm, LLC, has introduced the SLE700 satellite link emulator, an instrument that allows the performance of Earth terminals and satellite payloads to be evaluated both during design and before equipment deployment. Typically used within a large closed-loop test set-up, the SLE700 creates a communications link that simulates the conditions present from the uplink Earth station, through the transponders of one or more satellites, to the downlink Earth station. To this transmission path, it adds signal impairments such as propagation delay, fading, Doppler shift, and phase shift. The SLE700 has a maximum RF bandwidth of 45 MHz (up from 20 MHz), a signal-to-noise ratio improvement of 15 dB, and 10 dB greater rejection of spurious signals. The SLE700 is a microprocessor-based system and employs solid-state memory for data storage. The SLE700 can reside on a LAN and be controlled along with the other instruments in the test system via a PC-based test manager. Control can be performed with user-created test scripts that make calls to the SLE700's function library or by PC software included with the instrument that enables remote control and eliminates the need to write software. The SLE700 is available with one, two, or four channels, and its standard center frequency is 70 or 140 MHz. Other frequencies through K band can be accommodated with external dBm frequency converters.
dBm LLC
dBm Corp.
6 Highpoint Drive
Wayne, NJ, 07470
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