Applications - IMG STAGELINE VU-800PRO Mode D'emploi

•
For cleaning the product, only use a dry, soft cloth; never
use water or chemicals .
•
No guarantee claims for the product and no liability for any
resulting personal damage or material damage will be ac-
cepted if the product is not correctly used or not expertly
repaired .
If the product is to be put out of operation defin-
itively, dispose of the product in accordance with
local regulations .

3 Applications

This processor-controlled stereo VU meter is used as a con-
trol display for level adjustment of PA and DJ systems . The
three-colour level display of 40 LEDs each per channel can be
switched from bargraph to dot display and vice versa .
The VU meter has especially been designed for installation
into a rack (482 mm / 19") . However, it can also be used as a
table top device, if required . For rack installation, a height of
1 rack unit = 44 .45 mm is required .
8
4 Basic Adjustment of the VU Meter
Prior to level measurement of a music system, the VU me-
ter must be adjusted via a test signal in such a way that the
LEDs "0 dB" will light up when the system has been set to its
optimum level . For professional audio devices, the nominal
voltage level (0 dB range) is 0 .775 V or 1 V .
1) Feed a 1 kHz sine signal of 0 .775 V or 1 V to the input jacks
AUDIO IN (6) . For this purpose, use a tone generator (os-
cillator) or a test CD with a corresponding 0 dB test signal .
You can also use the output signal of an audio device set
to 0 dB .
2) Connect the VU meter to the power supply, switch it on
and select the desired display mode [
Operation", items 3) and 5)] .
3) An optimum adjustment has been obtained when the level
display (3) indicates 0 dB . In case of a higher or lower level
value, the VU meter must be adjusted via the sensitivity
controls ADJUST (1); the upper control for the left channel
and the lower control for the right channel: Use a small
screwdriver to turn the two trimming controls until the
level 0 dB is indicated for each channel .
☞ chapter 5 "Before