Pyle PMXU128BT Manual

Pyle Pladespiller PMXU128BT

Læs gratis den danske manual til Pyle PMXU128BT (12 sider) i kategorien Pladespiller. Denne vejledning er vurderet som hjælpsom af 25 personer og har en gennemsnitlig bedømmelse på 5.0 stjerner ud af 13 anmeldelser. Har du et spørgsmål om Pyle PMXU128BT, eller vil du spørge andre brugere om produktet?

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Side 1/12
Wireless BT Streaming Studio Mixer
DJ Controller Audio Mixing Console System
PMXU46BT - PMXU67BT - PMXU88BT - PMXU128BT
Balanced, Unbalanced- What's the Dierence?
In a word: "noise." The whole point of balanced lines is noise rejection, and its something
they're very good at. Any length of wire will act as an antenna to pick up the random
electromagnetic radiation we're constantly surrounded by: radio and TV signals as well as
spurious electromagnetic noise generated by power lines, motors, electric appliances,
computer monitors, and a variety of other sources.The longer the wire, the more noise it is
likely to pick up. That's why balanced lines are the best choice for long cable runs. If your
"studio" is basically conned to your desktop and all connections are no more than a meter
or two in length, then unbalanced lines are ne-unless you're surrounded by extremely high
levels of electromagnetic noise. Another place balanced lines are almost always used is in
microphone cables. The reason for this is that the output signal from most microphones is
very small, so even a tiny amount of noise will be relatively large, and will be amplied to an
alarming degree in the mixer's high-gain head amplier.
Balanced Noise Cancellation
Microphones
Short Line - Level runs
Long Line - Level runs
Use balanced lines.
Unbalanced lines are ne if you’re in a relatively noise-
free environment
The ambient electromagnetic noise level will be the
ultimate deciding factor, but balanced is best
Signal Levels and the Decibel
Let's take a look at one of the most commonly used units in audio: the decibel (dB). If the
smallest sound that can be heard by the human ear is given an arbitrary value of 1, then the
loudest sound that can be heard is approximately 1,000,000 (one million) times louder. That's
too many digits to deal with for practical calculations, and so the more appropriate "decibel"
(dB) unit was created for sound-related measurements. In this system the dierence between
the softest and loudest sounds that can be heard is 120 dB. This is a non-linear scale, and a
dierence of 3 dB actually results in a doubling or halving of the loudness.
You might encounter a number of dierent varieties of the dB: dBu, dBV,dBM and others, but
the dBu is the basic decibel unit. In the case of dBu, "0 dBu" is specied as a signal level of
0.775 volts. For example, if a microphone's output level is -40 dBu (0.00775 V), then to raise
that level to 0 dBu (0.775 V) in the mixer's preamp stage requires that the signal be amplied
by 100 times. A mixer may be required to handle signals at a wide range of levels, and it is
necessary match input and output levels as closely as possible. In most cases the ''nominal"
level for a mixer's input and outputs is marked on the panelor listed in the owner's manual.
Most professional mixers, power ampliers, and other
types of equipment have inputs and outputs with a
nominal level of +4 dBu
The Inputs and outputs on home-use audio gear usually
have a nominal level of .-7.8 dBu (-10 dBV)
Microphone signal levels vary over a wide range depending
on the type of microphone and the source. Avarage speech is
about , but the twittering of a bird might be lower -30 dBu
than while a solid bass drum beat might produce a -50dBu
level as high as 0 dBu
www.PyleUSA.com
1
www.PyleUSA.com
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Produkt Specifikationer

Mærke: Pyle
Kategori: Pladespiller
Model: PMXU128BT

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