Operating Notes - AKG AS 8 Kurzbedienungsanleitung

3 Installation and Interfacing
Important!
3.4 Connecting to the
Computer
3.5 Connecting Remote
Level Controls
Fig. 2: Remote level control
example.
3.6 Connecting to
Power

4 Operating Notes

4.1 Local Mode
Refer to the switch symbols
on the rear panel, above the
input terminals.
4.2 Remote Mode
(Computer Control)
4.2.1 Installing the
Software
4.2.2 Setting Up your
Software
6
Each audio channel provides an unbalanced direct output called DIR. OUT. If you use the DIR. OUT terminals as
additional outputs, DO NOT connect the ground lead (shield) of the cable to the ground terminal of the respec-
tive input but to the ground terminal of the MAIN OUT.
Use the supplied RS-232 cable to connect the RS-232 port on the AS 8 / AS 8 TC rear panel to the RS-232 port on your
computer.
1. Connect the cable on the supplied AC adapter to the PWR IN jack on the AS 8 / AS 8 TC rear panel.
2. Connect the AC adapter to a convenient power outlet.
You can set up and operate your AS 8 / AS 8 TC either in Remote mode from a computer or in Local mode using the
controls on the AS 8 / AS 8 TC itself. If you have not connected the AS 8 / AS 8 TC to a computer, you can set all
parameters on the unit itself as soon as you switched power to the unit on. If you connected the AS 8 / AS 8 TC to a
computer and installed the supplied software (refer to section 4.2), you will first have to click on "Local AS 8" in the main
menu.
Switch the unit ON with the POWER switch and adjust the various parameters:
1. DIRECT/AUTO: The rear panel dip switch no. 1 toggles the appropriate channel between DIRECT (always on) mode
and AUTO mode (the channel will be open for as long as somebody talks into the microphone). The ON LED illumi-
nates for as long as the channel is active.
2. Phantom power: Dip switch no. 2 switches phantom power ON or OFF for each channel.
3. Input gain and level: Dip switches nos. 3 and 4 set the input gain for each channel in 3 steps (0 dB, +30 dB,
+60 dB).
The LEVEL rotary pot on the front panel adjusts the relative signal level of each channel.
4. Output level: The front panel OUTPUT LEVEL control sets the output level at the MAIN OUT terminals.
5. Compressor/Leveller: The COMP/LEVEL IN/OUT switch lets you switch the compressor/Leveller into (IN) or out of
circuit (OUT). The THRESHOLD control sets the compression threshold from 0 dB to –40 dB. We recommend using
THRESHOLD settings of –12 dB or lower.
The GAIN REDUCTION LEDs indicate the instantaneous amount of gain reduction applied to the output signal.
6. Tone controls (AS 8 TC only): The LF controls cut or boost the low frequency range for each channel, the HF con-
trols cut or boost the high frequency range.
7. Make sure the rear panel MASTER/SLAVE switch is in the correct position (refer to sections 3.1 and 3.2).
1. Insert the CD-ROM into your drive. The installation program will start automatically.
2. Follow the on-screen instructions.
3. Enter your name and company name when asked and we you to accept the default directory.
4. If you are not familiar with the LecNet software we recommend you to choose "Typical" installation.
5. Click on "Next" and accept the given setting by double-clicking on "Next" again.
6. To complete the installation, click on "Finish" when asked for.
7. You can now start the software anytime by clicking on "Start/Program/LecNet for AKG".
Before starting the program:
• Check that the AS 8 / AS 8 TC is connected to your computer. If it is not, use the supplied RS-232 cable to connect
the AS 8 / AS 8 TC to the computer. Switch power to the AS 8 / AS 8 TC ON.
The REMOTE LEVEL CONTROL 15-pin D-Sub connector
on the rear panel of the unit allows you to control the level
of each channel separately or to mute channels individual-
ly. Depending on the application, you can use potentio-
meters, switches, or external control voltages.
Fig. 2 shows three examples:
Continuous level control of channel 1 using a 10 kΩ
linear pot.
U
ext
Muting channel 5 with an SPST switch.
continuous level control of channel 7 using an external
DC control voltage (U = control voltage, = ground).
ext