In wireless technology, the key to device performance is the device’s ability to distinguish the applied signals as legitimate information from any background noise or signals on the spectrum. Furthermore, in some cases, this can also mean the difference in a device functioning or not, and in all cases, it affects performance between transmitter and receiver. In summary, this is what makes having a high signal to noise ratio so important. Again, it would make the task of the receiver exponentially more challenging to decipher the desired signal. Now suppose the desired signal is essential data with a strict or narrow tolerance for errors, and there are other signals disrupting your desired signal. Also, in a scenario such as this, we would consider this to be a signal to noise issue or the equivalent of a signal to noise ratio that is below acceptable parameters. As you can also imagine, it would be nearly impossible to understand the other party involved in your conversation. In the previous comparison, you can get a better understanding of what is meant by an unwanted signal or noise. As you can imagine, it would be difficult to decipher which person is saying what. Furthermore, a few of the other individuals also have similar voice patterns to you and the other individual involved in your discussion. However, the room is full of other people who are also having conversations. For example, say that you and one other person are inside a large room having a conversation. Also, a ratio greater than 0 dB or higher than 1:1, signifies more signal than noise.Īside from the technical definition of SNR, the way I define it in other terms is by using a comparative. In other words, SNR is the ratio of signal power to the noise power, and its unit of expression is typically decibels (dB). In terms of definition, SNR or signal-to-noise ratio is the ratio between the desired information or the power of a signal and the undesired signal or the power of the background noise.Īlso, SNR is a measurement parameter in use in the fields of science and engineering that compares the level of the desired signal to the level of background noise. Therefore, over the next few paragraphs, I will discuss SNR and how to calculate it to ensure design accuracy. So, if SNR can make that much of a difference in musical sound clarity, then its importance in signal transmission applications is exponentially more critical. Furthermore, even to the untrained ear, the difference in the clarity and musical presence was undeniable. The one specification that was always better than the lesser brands was their signal to noise ratio (SNR). The clarity that they were speaking of was only achievable through their superior signal to noise ratio specifications. ![]() This was most certainly the case for the CD receiver, and the most taunted difference the high-end car audio components could use to sway their customers was superior clarity. However, where there is capitalism, you are sure to find direct competition. With its superior clarity and ease of use, the CD receiver’s reign was complete. Which, of course, ushered in the car audio CD receiver. Just like there was a demand for devices to play the new 4K video standard of today, the same was true for the compact disc. Moreover, the CD was a game-changer back then, and the clarity it afforded versus the cassette tape was undeniable. However, many would argue that it still is, under certain conditions. However, during this time, the onset of the compact disc and, of course, the car subwoofer was taking center stage.īefore the compact disc, vinyl was the clear-cut choice for audio reproduction, in terms of listening pleasure. ![]() For me, music was intoxicating, almost as much as the fields of Science and Electronics. The whole thing was absurd our government dollars at work.As a teenager, while learning the ins and outs of car audio, I often basked in the sheer detail of every note. I can mention this because the statute of limitations means I can no longer be held legally responsible for the fraud (we were selling "new parts"). But apparently it was fully functional when complete. I don't know where they found the old vacuum tubes. (Dumont went out of business shortly after WWII). It turned out that we "corrected" an error the customer made when reverse engineering the chassis. We ended up going to Mott Street in NY and buying 10 old Dumont Oscilloscopes and dismantling and re-finishing the pieces and reassembling them. The rationale for this purchase was that "the training manuals were already written". ![]() By the time they had sourced all the components each unit ended up costing over $8,000.00. The chassis was going to cost $700.00 each. You could buy a "modern" oscilloscope for under $2,000.00 back then. Click to expand.In the late 1970s the company I worked for was asked to produce a metal chassis for a Dumont Oscilloscope.
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