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DS30EA101: What constitutes a Loss of Signal (LOS)

Part Number: DS30EA101

Hello,

We are experiencing an LOS detection on the DS30EA101 when it appears there is still a high-integrity 2.6GHz signal being received; meaning a good eye-pattern is observed on an oscilloscope, and the amplitude of the signal is near 800mVp-p. Is there technical data describing how a Loss of Signal (LOS) is detected? From the datasheet, we just read "LOS indicates the loss of signal at the DS30EA101 input. LOS is high when no input signal is present and low when a valid input signal is detected." 

When is the incoming signal considered valid? How is this detected by the DS30EA101?

  • Hi Derek,

    LOS indicator checks signal level within a frequency range less 1GHz. Typical data patterns such as PRBS and etc they have low frequency content. However, a clock pattern such as 2.6GHz is output of the signal detector bandwidth.

    Regards ,, nasser