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FRONT PANEL CONTROLS
-6-
(4) Audio Input Impedance Switch (S5)
This 3 position toggle switch is used to change the input impedance
of the Mic and Aux Inputs (19,20 & 21). Input Impedances of 200 ohms,
600 ohms and 50K ohms ( HI-Z)may be selected.
(5) Mic In Gain (R12)
This potentiometer, when turned clockwise, can increase the Audio Input
signal levels up to about +40dBv. The mic gain should be changed while
speaking into the microphone, until 3 or 4 green Bar Graph (7) LED’s
are illuminated. Audio levels should be maintained in the green and
yellow ranges of the LED Bar Graph(6) .
(6) LED Bar Graph
The 10 segment LED Bar Graph indicates peak to peak EQplus internal
audio levels. The position of the Equalizer (7) and Compressor /
Downward Expander (10) switches control what internal function is being
indicated. The tables below defines what the LED Bar Graph is indicating.
The pictorial below shows the EQplus Audio Chain
EQplus BAR GRAPH MONITORING
Compressor Equalizer
Bar graph monitoring
off off Output of Audio Amp
off on Output of Equlaizer
on off Output of Compressor
on on Output of Compressor
dB reading
Peak to Peak
voltage
0 1 Volt
-6 500 mv
-12 250 mv
-24 125 mv
VV
VV
VV
VV
VV
VV
VV
VV
VV
Audio
Amp
Dual
Band EQ
BAR
GRAPH
Comp./
Dwrd Expd.
EFFECTS
PROC.
ON
OFF
Audio Out
AUDIO
AMP
Audio IN
ON
OFF
ON
OFF
EQplus AUDIO CHAIN