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p.4
Quick ref guide
Alpha TDcontroller
Release : 0
Date : 03/12/99
III.8. Mains Socket
WARNING : This appliance must be earthed.
The socket is compatible with mains supply flexible cords which comply with IEC Publication 227.
IV. Functions requiring the opening of the
TDcontroller
IV.1. Enhanced protection trimmers
The embedded trimmers (Red wheel) are used to change the thresholds of the protection system.
TR13 affect the threshold of the HF (active) and Right (passive) protections
TR15 affect the threshold of the LF (active) and Left (passive) protections
TR18 affect the threshold of the SUB protections
It is not recommended to increase the threshold. (Marked « - ») as the protections will be lowered.
In the mid position the speaker protections will be set for normal operation (This is the factory set
position). When turned fully clockwise (), protections will be increased ; e.g. this setting should
be used where the system is operating under harsh conditions (identical gain for each amp is not
checked ) Intermediate positions of the trimmer can also be used and will be recommended in cases of
extended periods of overload (e.g. in some discotheque applications).
V. Setting-Up Advice
V.1. Recommendations for wiring the Sense lines
The impedance of the sense inputs of the TDcontroller being quite high, the currents are low and
therefore ordinary line cable can be used. If the unit is housed in the amp racks an unshielded cable can
be used.
