ALL-MC115VDSL2 Mini Modem Master/Slave Manual
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INP(Impulse Noise Protection): Impulse noise in multicarrier communication systems behaves effectively as a modulating
signal that controls the first moment of the background Gaussian noise. The composite noise, which is the aggregate of the
Gaussian noise and impulse noise, has a probability density function that is conditionally Gaussian with non-zero average,
hence referred to as biased-Gaussian. The BER-equivalent power of the composite noise source is defined as the power of a
pure Gaussian noise source that yields the same bit-error rate (BER). The BER-equivalent noise for a biased-Gaussian noise
is simply the amplified version of the underlying Gaussian noise source. The amplification factor is derived from the
characteristics of the impulse interference. Any bit-loading algorithm designed for Gaussian noise sources is also applicable to
biased-Gaussian noise sources provided that the BER-equivalent SNR is used in place of the measured SNR.
SNRM(Signal to Noise Ratio Margin): It's very similar to a conversation at a party and it's dealt with in the same way; we naturally
account for both distance from the other person and the amount of background noise. When we do we don't just talk loud enough to
be heard, we speak a bit louder waiting for the idiot with the stupid, loud laugh to start up again. We add a bit extra on to make sure
we're louder than the average change in background noise.
That ratio is a major factor in determining the connection speed, as the higher the ratio the higher the possible speed. The SNRM is a
margin which by which the noise level can rise before connection is lost.
Safety Caution!
1.
Be sure to disconnect the power when installing(uninstalling) the terminal block and power cable.
2. Please note that the user can use 12VDC power input. Do not exceed DC 12V.
3.
Be sure to disconnect the power before installing and/or wiring your ALL-MC115VDLS2 bridge.
4.
Please calculate the maximum possible current in each power wire and common wire. Observe all electrical codes
dictating the maximum current allowable for each wire size.
If the current goes above the maximum ratings, the wiring
could overheat, causing serious damage to your equipment.
