Speck-electronics EQ16 Manuel d'utilisateur télécharger pdf (Page 28)

When using the EQ16 it is important to understand the relationship

between the maximum input level, the maximum output level, and the

boost/cut controls. The maximum input level for the EQ16 is +28 dBu,

and the maximum output is +28 dBu. The EQ16 can not exceed these

maximum input or output levels without incurring distortion. The

equalizer channels do not have any gain, so any signal that goes in will

come out at the same level.

When interfaced to professional audio equipment that produces a

nominal level of +4 dBm for a 0 VU indication, the Model EQ16 has a

headroom margin of 24 dB.

The margin of headroom for the above examples apply only when the

boost/cut controls on all three bands are set flat (0 center position).

When any boost/cut or any combination of boost/cut are "boosted", the

margin of headroom is decreased. When any boost/cut or any

combination of boost/cut are cut, the margin of headroom is increased.

The preceding statements only apply to the frequency(s) that have been

selected with the respective frequency sweep controls. When the EQ

bypass switch is disabled, the maximum output of the EQ16 is only

limited by the maximum output of your device.

For the sake of the following discussion, only "boosting" the boost/cut

controls will be discussed since "cutting" on any band or combination of

bands can only increase the headroom margin for its respective

channels.

The boost/cut controls can be thought of as a gain increase or decrease

control for the specific frequency(s) that have been selected. For

example, if your signal had a low frequency signal content and this

signal was boosted 12 dB, this would leave you 12 dB of headroom for

that low frequency signal before the output would clip or cause

distortion.

Although 12 dB of headroom is not much, it still will result in a clean

undistorted signal.

formula:

Boost/Cut

Headroom and

Boost/Cut

formula:

+28 dB max output minus +4 dB = 24 dB of headroom

+4dBu reference level plus 12 dB boost minus 28 dBu maximum

output = 12 dB headroom.

Chapter 4 Operation Section

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Speck-electronics EQ16 Manuel d'utilisateur Page 28