Hi,
why in TLC having negative TX values is valid? How can we transmit something if the transmission power is in the negative?
Why for at least in fiber optics the “no signal received” was established to be -40 dbm rather than 0?
In: 0
From Wikipedia, dbm is a dimensionless unit. It’s used to compare values, so a negative value is perfectly reasonable and represents one value being lower than the other.
Dimensionless units are essentially numbers, framed using context for a particular use case. Another common example is a radian, used to represent an angle
Latest Answers