Nagra Seven Operating Instructions Manual page 30

ALC / LIM.
The Nagra Seven is equipped with a very sophisticated, fully programmable internal audio control
system that can be set as an audio limiter or ALC, or any combination between the two. It is an
entirely new approach that allows the user to adjust the parameters exactly as desired. The different
parameters of the system, such as the headroom, target, attack, release and ratio can all be set with
dropdown menus from the settings window. If the GRAPHIC window is opened then the operating
zone can be visualised to give a clearer understanding of the settings. When the graphic display is
shown, turning the left or right potentiometer will adjust the parameters for the corresponding
channel.
If the PRESET button is pressed a drop-down menu will appear allowing the user to choose between
several pre-programmed operational modes for the ALC / LIMITER. This is the simplest selection for
those not wishing to set all the parameters individually.
Preset:
Headroom:
Target:
Input attenuation:
Attack:
Delay:
Release:
Ratio:
Limiter activation is shown on the main modulometers by the "L&R" having a yellow background.
Chapter III
User selectable preset values
The range into which the signal can go before distortion
The upper limit of the operational zone
Analog input attenuation control
The reaction time – ideal to filter against activation by rapid sounding HF
signals
Time before the release is active.
The decay time of the ALC/Lim effect.
How much audio compression will be used (i.e. 6:1 means that 6dB will be
compressed to 1 dB)
29 September 2014