XTA 5 series, Руководство оператора

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Page 52
5 Series 5 Series 5 Series 5 Series
Operator’s Manual
Program Limiter and “D-Max” Limiter
The 5 Series
5 Series 5 Series
5 Series have two levels of dynamic protection on its outputs – a traditional program limiter, and a newly
introduced “D-Max” limiter.
Program Limiter
High performance digital limiters are provided for each output with control over attack time, release time and threshold
parameters - see page 44 for details. This level of control allows the user to balance the required subjective quality of the
limiter against the driver protection requirements. It does also mean that an incorrectly set limiter may sound awful! In
particular, as with all limiters, using too fast an attack or release time will result in excessive low frequency distortion. In
the
Design a Crossover Design a Crossover Design a Crossover Design a Crossover
sub-menu there is an option for automatic limiter time constants. Use this option if you
are unsure how to set the time constants manually. XTA recommend the use of the automatic setting.
In this mode the time constants will be automatically set from the High-Pass filter frequency according to the table below.
The time constants are set by the high pass filter frequency for that channel.
High Pass Filter Auto Attack Time Release Time
<10Hz – 31Hz 45mS x16 (720mS)
31Hz – 63Hz 16mS x16 (256mS)
63Hz – 125Hz 8mS x16 (128mS)
125Hz – 250Hz 4mS x16 (64mS)
250Hz – 500Hz 2mS x16 (32mS)
500Hz - 1kHz 1mS x16 (16mS)
1kHz – 2kHz 0.5mS x16 (8mS)
2kHz – 32kHz 0.3mS x16 (4mS)