Manual-2
Front Panel Description
1 PRIORITY GAIN trim and OL indicator: adjusts the gain for the PRIORITY INPUT. Set this trim to prevent overloading the
Input — if the Priority Gain OL illuminates, turn down the GAIN.
2 PRIORITY DETECT trim and ACTIVE indicator: sets the threshold in dBu for the PRIORITY INPUT to override the LINE
INPUT. When the threshold has been reached, the ACTIVE indicator illuminates. Set the GAIN(1), then set the DETECT trim.
e range of operation is +4 dBu to ON. e release time for the auto-detect circuit is xed at about 6 seconds, after which the
LINE INPUT signal returns to it's previous level.
3 PRIORITY DUCKER trim: sets the amount of attenuation applied to the LINE INPUT signal when the PRIORITY INPUT is
activated by the DETECT threshold. DUCKER depth is continuously adjustable over a range of 0 dB to –80 dB. For equal mix-
ing of PRIORITY and LINE, set the DUCKER to 0 dB. For PRIORITY replaces LINE operation, use –80 dB. A value of –12
dB (1 o’clock) is typical for PRIORITY (page) talks over LINE (music) operation.
4 AGC TARGET LEVEL trim: is best set so the average signal at the LINE INPUT reads 0 dB on the GAIN meter. is gives the
best performance of the AGC (Automatic Gain Control). Active constant gain range of the AGC is ±12 dB (24 dB range). When
the Input falls 26 dB below the AGC Target Level, gain returns to unity. See Setup and Operation, step 2.
5 AGC RATIO trim: determines the Ratio applied to the AGC with a soft-knee response. Increased clockwise rotation increases
the amount of AGC. e full counter-clockwise position disables the AGC. e normal range of operation is between 2:1 and
∞:1 as marked by the gray band.
6 AGC SLOW/FAST release switch: determines the gain reduction time constant of the AGC circuit. SLOW = 230 ms (best for
music), FAST = 11 ms (best for voice). e gain increase time constant is xed at 1100 ms.
7 AGC GAIN meter: indicates the amount of AGC applied to the LINE INPUT. e 0 dB GAIN indicator is o if the Input is
more than 26 dB below the Target Level.
8 CROSSOVER FREQUENCY switch and indicators: select the FREQUENCY for the 2-way Crossover when High-Pass and/or
Low-Pass outputs are used (80, 110,150 or 200 Hz). High, Low or Full-Range is selectable for each of the six Outputs.
9 OUTPUT trims and Crossover select switches: e ±12 dB trims set the levels for each of the six Outputs. High, Low or Full-
Range is switch selectable for each of the six Outputs. Note: the Output trims do not affect Low-pass loudness compensation or Prior-
ity Input level. See Setup & Operation, step 5.
0 POWER indicator LED: is yellow illumination device lights up to let the operator know the thing is plugged in.
dBu dB
+4ON
MIN MAX
-12-80 0 +12 1:1
:
1
dBu
-12
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12 -6 -3 03612
DA 26S
DISTRIBUTION
PROCESSOR
DETECT
PRIORITY
GAIN DUCKER
AGC
1
CROSSOVER OUTPUTS
POWER
OL SLOWACTIVE
LEVEL RATIO
FAST
GAIN
TARGET
HIGHFULL
LOW
3
HIGHFULL
LOW
2
HIGHFULL
LOW
4
HIGHFULL
LOW
5
HIGHFULL
LOW
6
HIGHFULL
LOW
FREQUENCY
150
11080
200
