MACRO range installation manual. Issue 6
Automatic level control - all units except slave amplifiers. Mustang product code TB/ALC
The standard module fitted to a mixer or
The module operates to produce a fast ìattackî so that limiting to a
To set the module to give the required performance: Firstly, referring to APPENDIX E, identify the ëGAINí
The module will now be operating as a limiter. To enable the Automatic Level Control aspect, the GAIN control should now be adjusted clockwise until sufficient gain is available to enable the lowest level input signal to attain the THRESHOLD.
The ALC facility will have been specified where -
a) The amplifier output is required to be limited to prevent clipping distortion; b) The average sound level is to be limited to a specific audible level;
c) Inductive loop systems which may be unattended though still need to operate to the requirements of the current legislation.
As supplied by the factory, GAIN is set to 0dB (unity) and the THRESHOLD control is set to maximum, and therefore no effect will initially be apparent. See APPENDIX D to locate the module, and APPENDIX E for identification of the adjustments.
Fig. 11 Balanced line input connections
Balanced line input for M/100 and M/250 slave amplifiers. Mustang product code MAC/LT
This option would normally be fitted where difficulty may otherwise be experienced with hum/earth loops. The input signal circuit has no earth connection, and is referred to as being ìfully floatingî.
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