D.A.S. Audio DSP-26 USB - Manual (Page 39)

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11.4 Limiter
Limiting Threshold(dBu)= Transducer voltage limit (dBu) -Amplifier gain(dB)
11.5 Delay
11.6 Delay Linking
Each Output channel has a dedicated limiter that can be set to a threshold any where between -10 to
+20dBu.
There are two primary uses for limiters: One is for prevention of amplifier clipping and the second
is to limit the amount of power transmitted to the transducers. In applications where systems are
likely to be run at high volume levels for long periods of time, setting the correct limiter threshold is
important for the protection of the speaker drivers.
The value set in this screen is also the Output channel meter reference value. If the Limiter is adjusted
to say 2.0dBu, then the Output meter for the selected channel will represent +2dBu at LIMIT with
the -3,-6,-12 and -20 dB reading relative to that level. I.e. -1dBu, -4dBu,
-8dBu and -18dBu.
Note that limiters are usually set slightly below the maximum settings.
Limiter Level Calculations
The method for setting the limiting threshold is given by the following equation:
Output channel Delay is adjustable from 0-365 ms in 21us steps. At no time can there be more than
635ms of delay on any Input to Output path. The and buttons select delay time values in 21 s steps
whilst the rotary can be used to select larger delays quickly.
Use the and buttons or rotary encoder to select the preferred measurement units.
Returning to the delay parameter, by pressing the associated Output button, recalculates the delay
values for all displays and remembers this setting until it is either changed again or stored with a
Program.
OUT 1 & 2 AUX *
LIMIT -6.2DBU
OUT 1 & 2 BAND 3 *
DELAY
4.958MS
OUT 2 C LOW *
DELAY LINK TO 5
This is used to maintain offsets between various channels. Typical uses include setting individual
transducer delay offsets for optimum performance and then linking them, i.e. driver alignment. If
OUT 1 & 2 BAND 3 *
DELAY
4.958MS
OPERATION
Manual del usuario/ User´s manual DSP-26