Rev.7a (for units from ser.no. 51053/built 2010) 26.01.2010 This document substitutes previous versions page 6 of 34
Zähl Elektronik-Tontechnik • Odenthaler Str. 47 • D-51465 Bergisch Gladbach • [email protected] • www.zaehl.com
Distributor (National/International):
sono Studiotechnik GmbH • Haagerstraße 5 • D-81671 München • Tel. +49 89 419671-0 •
•
www.sono.de
AIRCOM Manual
3.
Connection
3.1.
Power Supply
3.1.1.
Plug the 4pole XLR connector which is mounted to the cable fixed to the power supply into one of the
4pole XLR connectors designated “POWER IN” on the rear panel of the AIRCOM unit.
3.1.2.
Connect the power supply to a correctly earthed mains power socket. You may connect the power
supply to 100-240VAC at 47-63Hz mains voltage without the need of selecting a voltage range.
Important Note:
Always connect the power supply in the order described above. Otherwise there is a
risk of damaging the power supply and/or the unit.
3.1.3.
AIRCOM units provide two power inputs. You can connect two power supplies at the same time in order
to ensure a fail-safe operation. If power at one of the inputs fails, the other one will take over.
3.1.4.
12V-24V regulated DC is allowed at the power inputs. We deliver power supplies within this voltage
range. You can connect power supplies with differing voltages at the same time. The one with the
higher voltage supplies the unit. If it fails, the one with the lower voltage will take over.
3.2.
Audio
3.2.1.
Microphone Inputs
Microphone inputs are designed for input levels from -64dBu to 0dBu (GUEST: -60dBu...-15dBu).
Depending on the configuration setting the inputs provide 48V phantom power.
Important Note:
Before connecting a microphone always check if the input configuration on your
AIRCOM complies with the microphone data. In case of incompatibility there is a risk of damaging your
microphone.
3.2.2.
Headphones Outputs
Only connect stereo-wired jack connectors on the headphones outputs. AIRCOM provides dedicated
output circuits for left and right channel. Do not connect Tip and Ring on a stereo jack and never use a
mono jack.
The headphones outputs deliver voltages up to 10Veff. Only connect headphones with an impedance of
more than 30 Ohms per system.
Please consider that the headphones output stages provide high gain margin in order to drive high
impedance as well as low impedance headphones. Using low impedance headphones it is most unlikely
that you need to set the PHONES volume controller to maximum position.
Important Note:
Always set the phones level potentiometer labelled „PHONES“ to minimum (fully
counter-clockwise) before you connect your headphones. Otherwise there is a risk of damaging your
ears by high sound pressure level. Furthermore there is a risk of damaging your headphones.
3.2.3.
Other Audio Inputs and Audio Outputs
Standard audio inputs and audio outputs are transformer balanced and designed to a reference level of
+6dBu and a maximum level of +18dBu (typ.).
Auxiliary audio inputs/outputs and GUEST line input are designed as electronically balanced stages at the
same reference level and maximum level as above.
Important Note:
Connecting DC exceeding 1V is not allowed and can lead to damages inside the unit.
