WTG N WEBINAR SM

Precision Eb/No Generators for Satellite  

Modem BER vs. Eb/No Testing

About CNG-EbNo

Noisecom's CNG-EbNo is a fully automated precision Eb/No generator that sets a highly accurate ratio between a user-supplied carrier and internally generated noise over a wide range of signal power levels and frequencies. The CNG-EbNo gives system, design, and test engineers in the satellite and military communication industries a cost-effective means of obtaining higher yield through automated testing, plus increased confidence from repeatable, accurate test results. Satellite applications include military communications, SATCOM, L-band, Milstar, Inmarsat and Intelsat. A fully calibrated high dynamic range power meter allows the CNG-EbNo to set the desired Eb/No ratio to within ±0.2 dB. Special configurations can provide improved accuracy. Dual band units as well as custom frequencies and configurations are available.
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Webinar & Application Note:  
The Implementation Margin of a Satellite Communication System
The Implementation Margin of a Satellite Communication System is defined as the degradation of the signal after travelling through the up and downlink equipment. In order to find this, an Eb/No generator such as the Noisecom CNG-EbNo Series can first be used to carry out an IF loopback test of the modem in order to find bit error rate (BER) values at different Eb/No ratios. A plot of these values can then be compared with the theoretical curve for the digital modulation scheme being used. The resultant difference is termed the implementation loss of the modem, and this value is used as a reference level for the second part of the test, in which the implementation margin of the complete up and downlink is found.
 
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