Rane DA 26S DA 26S Manual - Page 4

Operators Manual DA 26S DISTRIBUTION AMPLIFIER GAIN PRIORITY DETECT DUCKER TARGET LEVEL RATIO AGC MIN MAX OL ON +4 -80 0 dBu dB ACTIVE -12 +12 dBu 1:1 :1 GAIN SLOW FAST -12 -6 -3 0 3 6 12 CROSSOVER OUTPUTS FREQUENCY 1 2 3 4 5 6 80 110 -12 +12 -12 +12 -12 +12 -12 +12 -12 +12 -12 +12 150 200 FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW DA 26S DISTRIBUTION PROCESSOR POWER Quick Start Are you in a hurry? For optimum system performance, we recommend reading the detailed Setup & Operation below and on page Manual-4. For those who can't wait, at least be aware of these points: • There are two inputs: PRIORITY and LINE. The PRIORITY Input accepts MIC or LINE level. • The PRIORITY Input sums with an output when assigned by the PRIORITY ASSIGN Port, and PRIORITY DETECT is ac- tive. • The level of the PRIORITY Input is unaffected by the AGC, Output Level controls or Remote Level controls. • The AGC only operates when the signal is within 26 dB of the Target Level. If the Line Input level is out of AGC range, the 0 dB indicator on the AGC GAIN meter is off. • With the RATIO set to ∞:1, the AGC GAIN meter should indicate about 0 dB for nominal Line Input levels. • The AGC SLOW / FAST switch only affects the gain reduction time constant. The gain increase time constant is fixed. • Only the LINE Input is processed by the AGC, CROSSOVER, Output Level and Remote level controls. • The three Crossover Outputs (full-range, high-pass and low-pass) may be selected by any of the six Outputs. • Set the initial Output levels using the Output Level controls on the front panel. • Remote Level controls allow end user adjustment of Output level. • Any combination of Remote Ports may be controlled by a single Remote device. • Remote Level controls provide automatic loudness compensation for low-pass Outputs. Loudness compensation is not provided for full range Outputs. • The optional VR 1 Remote Level control provides audio taper control over a range of 0 dB to -80 dB. Setup & Operation The outline below is detailed in the following procedure. 1. Set Line Input level 2. Set AGC (Automatic Gain Control) Target Level and Ratio 3. Set Crossover frequency 4. Select Source for each Output (Full-range, High-pass or Low-pass) 5. Set Output Level controls 6. Connect Output Remote Level controls 7. Connect the Priority Input for the intended source 8. Set the Priority Input automatic Detect threshold 9. Set Ducking depth for the application 10. Priority Assign selection 1. Connect a balanced line level source to the Line Input. The Line Input accepts an unbalanced Input connected to (+) and (GND). We do not recommend unbalanced operation unless the distance to the source is less than 3 feet [one meter]. 2. The Line Input signal is processed by the AGC circuit. The AGC GAIN meter 0 dB indicator lights when the Line Input signal is within 26 dB of the set TARGET LEVEL. For Line Input levels more than 26 dB below the Target Level, the 0 dB indicator is off and AGC returns to unity. The AGC GAIN indicates the amount of attenuation used to make the Line Input level equal the set TARGET LEVEL. For best results, WEAR PARTS: This product contains no wear parts. the AGC GAIN meter should indicate about 0 dB for nominal Line Input signals. The best resolution for this adjustment is achieved with the AGC RATIO set to ∞:1. The TARGET LEVEL is set in one of two ways: a) If you have a source output level control, set the TARGET LEVEL to the desired setting and adjust the Line Input level so that the AGC GAIN meter indicates 0 dB for nominal signal levels. b) If a source output level control is not available, adjust the TARGET LEVEL so the AGC GAIN meter indicates 0 dB for nominal Line Input levels. The difference between the resulting AGC Target Level and the desired Target Level is compensated with the OUTPUT trims. With Input level and TARGET LEVEL correctly set, adjust the AGC RATIO to the desired value. We recommended values between 2:1 and ∞:1 as marked by the gray band. The soft-kneeresponse of the AGC results in a natural sounding response with AGC Ratios as high as ∞:1. 3. The CROSSOVER splits the Line Input signal into three separate Outputs: Full-Range, High-pass and Low-pass, each selectable for each of the six Outputs. Select the desired FREQUENCY (80, 110,150 or 200 Hz). continued on page Manual-4... Manual-1