Rev. 5
16/04/2009
This document substitutes previous versions.
Page 8 of 12
Zaehl Elektronik-Tontechnik • Odenthaler Str. 47 • D-51465 Bergisch Gladbach • Germany • [email protected] • www.zaehl.com
Distributor (National/International):
sono Studiotechnik GmbH • Haagerstraße 5 • D-81671 München • Tel. +49 89 419671-0 •
•
www.sono.de
ASD-8 Manual
5.
Functions
5.1.
Audio Inputs
Audio input signals are fed from the XLR inputs marked „IN 1“ through to „IN 8“ on the rear panel to the
respective input sections on the front panel.
Via the OUTPUT ASSIGN switches audio signals can be assigned to any of the 8
output sections. Multiple assignments are possible, as all signals pass a summing
stage.
The rocker switches are off, when they are actuated to the lower
position; they are on, when they are actuated to the upper
position.
A green LED displays below each switch lights up, when a switch is ON.
+/- 15 dB gain can be set on the GAIN TRIMMER. In centre position gain is 0 dB nominal.
To the left of the GAIN TRIMMER there are two LED displays for level indication.
The yellow LED marked „SIG“ lights up, when level exceeds -25 dBu (+/- 2 dB). It monitors the
presence of a “significant” audio signal. Level detection is post GAIN TRIMMER. GAIN TRIMMER position
affects the indication.
The red LED marked „O/L“ lights up, when level is less than 3 dB from clipping. As maximum level is
+22 dBu, it will be triggered when level e19 dBu (+/- 0,5 dB). Level is evaluated pre and post
GAIN TRIMMER thus ensuring correct indication at any GAIN TRIMMER position. In order to clearly
display short level peaks, indication is stored for approx. 0,3 sec.
5.2.
Audio Outputs
Each output section provides a summing amplifier, so signals can be fed from any number of input
sections.
+/- 15 dB gain can be set on the GAIN TRIMMER. In centre position gain is 0 dB nominal.
To the left of the GAIN TRIMMER there are two LED displays for level indication.
The yellow LED marked „SIG“ lights up, when level exceeds -25 dBu (+/- 2 dB) at the output summing
stage. It monitors the presence of a “significant” audio signal. Level detection is pre GAIN TRIMMER.
GAIN TRIMMER position does not affect the indication.
The red LED marked „O/L“ lights up, when level is less than 3 dB from clipping. As maximum level is
+22 dBu, it will be triggered when level e19 dBu (+/- 0,5 dB). Level is evaluated pre and post
GAIN TRIMMER thus ensuring correct indication at any GAIN TRIMMER position. In order to clearly
display short level peaks, indication is stored for approx. 0,3 sec.
Output signals are fed to the XLR connectors marked „OUT 1“ through to „OUT 8“ on the rear panel.