What you are saying is technically incorrect. The data is encoded, such as using PAM constellations, meaning the digital signal (1 and 0) are converted to a multilevel signal such that each transmitted symbol represents more than one bit. As the signal is transmitted over the channel, it starts to appear as an analog signal due to the nature of high speed transmission and the channel. This can be seen as eye diagrams. The data does not ride or sit on an analog signal. Just the opposite, the data is the signal. Upon receipt at a receiver, the voltage of the signal is detected at specific time and that voltage is compared to numerous thresholds. The signal is then re-created based on the voltage value in relation to the threshold to re-create the PAM signal. For example, if the threshold are 0, 1, 2, and 3 in a PAM4 system, and if the received value is 1.1, then the signal is re-created and a 1 value is output. The noise or timing error that causes the received signal to be 1.1 instead of 1 does not have any impact after slicing (quantization). If the received signal is 1.4, it is sliced to 1. If the received signal is 2.7, it is output at a 3 from the slicer. Again, that noise or timing error does not have any impact. The signal is recreated and the noise discarded. The PAM4 signals are then decoded back to 1s and 0. This is a good link to read.
Best of all, the bit error rate of the home ethernet networks is amazingly good. There are CTLE, FFE, DFE that all clean up the signal to correct channel degradation. Plus, there is error correction such that each packet includes a error correction data that is used to detect and correct errors. And if, in the very rare instance, an error is not correctable, the packet will be resent and filled into the buffer of the streamer. A typical bit error rate is 10 to the minus 13, which means that for every 10,000,000,000,000 bit sent, there is 1 error. People do not hear this.
Even if there were issues (which there are not) between the steaming source, which could may be an another city or state, and your streaming box, the last 3 feet inside your house is the least of your worries after the likely awful path the data has already taken for the miles or hundreds of miles to get to you. And, over ultra short 3 foot link, there is so little signal degradation that we should not even be having this conversation. I encourage anyone to correct any technical errors I have made to advance the conversation and improve the accuracy of this forum.