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Do You Know the Absolute dB Scales

Decibel as Absolute Unit of Power It is also possible to use the decibel as a unit of absolute power, in addition to using it as an expression of power gain or loss. A common example of this is the use of decibels as a measurement of sound pressure intensity. In cases like these,

Posted on:10-11 View:318
The RF Engineer’s Guide to the Decibel

Learn about the decibel and its variants in the context of RF design and testing. RF engineering, like all scientific disciplines and subdisciplines, involves quite a bit of specialized terminology. One of the most important words that you will need when working in the world of RF

Posted on:10-11 View:288
What is Used to Represent Gain?

The Bel is Used to Represent Gain In its simplest form, an amplifier’s gain is a ratio of output over input. Like all ratios, this form of gain is unitless. However, there is an actual unit intended to represent gain, and it is called the bel. As a unit, the

Posted on:10-10 View:253
Decibels Relative to c、mv、d、i&r

decibels relative to carrier (dBc) dBc (decibels relative to carrier) is a measure of the strength of an instantaneous signal at radio frequency . The dBc increment is based on the decibel , a logarithm ic measure of relative signal strength. Suppose a signal has an

Posted on:10-10 View:219
What Does "Signal Booster DB Gain" Number In Decibels Mean?

What is dB in signal boosters? In simple terms, it means an amount of reception increase that device can generate. For example, some provide +23 dB whereas some may provide higher gain at +50 dB or even +72 dB. Let us examine precisely what the positive number followed by dB means in

Posted on:10-09 View:905
Decibel Tutorial: dB and dBm vs. Gain and Milliwatts

The concept of a decibel (dB) is understandably difficult and confusing for someone just being introduced to it. Combining specifications for gain, power, and voltage (and current, but not so often) that mix dB, dBm, dBW, watts, milliwatts, voltage, millivolts, etc., often requires c

Posted on:10-09 View:2025
Conversion: Voltage V to Voltage level Lu (dBu) and LV (dBV)

The origin of the index of dBu comes from "u = unloaded" and dBV comes from "V = 1 volt". Some say: The "u" in dBu implies that the load impedance is unspecified, unterminated, and is likely to be high. What is dBu? A logarithmic voltage ratio wit

Posted on:10-09 View:703
How to Calculate Decibels of Different Types?

The dB scale is always about a ratio, so how to calculate decibels of different types? It all depends on the different points of reference (0 dB mark). dBm was all about power and had the reference point measured in watts. The problem is that many of the equipment used in the audio wo

Posted on:10-08 View:573
How to Read dB and dBm and to Convert Back and Forth !

A deci (1/10) of a Bel is a dB, but the equation for dB = 10 * Log (Po/Pi) where Po is power out and Pi is power in. Since the Log (base 10) math function is to extract the exponent, a decibel uses the Log math function to find the exponent and that

Posted on:10-08 View:265
Power and Amplitude: Watts, Volts and Referenced Decibels

Introduction In radio frequency applications (but also in a lot of other application) is very common to deal with very large and very small signals. For example, a transceiver may transmit a power of 100 W and receive only 10 fW (or 0.000'000'000'000'01 W). The

Posted on:09-30 View:519

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