Extron Electronics System 7SC - Manual (Page 18)

Installation, cont’d
System 7SC • Installation 2-6
3 Audio inputs 1 through 6 — Each input has a 3.5 mm, 5-pole captive screw
connector for balanced or unbalanced stereo audio input. Connectors are
included with each System 7, but the user supplies the audio cable. See the
following wiring diagrams to wire a connector for the appropriate input type
and impedance level. High impedance is generally over 800 ohms.
LR A
UDIO
LR A
UDIO
LR A
UDIO
Unbalanced Input
Tip
Sleeve
Tip
Sleeve
Balanced Input
Tip
Ring
Sleeve (s)
Tip
Ring
Tip
Ring
Sleeve (s)
Tip
Ring
Balanced Input
(high impedance) (high impedance) (600 ohms)
600 ohms
600 ohms
Captive screw connector wiring for rear panel audio inputs
RS-232
PROJ CONTROL CONTACT CLOSURE RELAY 1 RELAY 2
1 2 DISPLAY PWR
SENSOR IR COMM
R G B H/HV V
INPUTS
SCP/AAP CONTROL
OUTPUTS
RGB
L R
1 2 3 4 5 A B C D E A B C D E 6 7 E D C B A A B C D E F G H I J
FIXED VARIABLE
E D C B A E D C B A
R
R-Y
G/Y
VID
H/HV
V
B/C
B-Y
R
R-Y
G/Y
VID
H/HV
V
B/C
B-Y
R
R-Y
G/Y
VID
H/HV
V
B/C
B-Y
4 5 6
L R
AUDIO OUT
4
1 2 3
1 Line level audio output (Fixed) — For unamplified audio output, connect an
audio device, such as an audio recorder, VCR, or powered speakers, to this
3.5 mm, 5-pole captive screw connector. Follow the diagram below for correct
wiring.
Unbalanced Output
Tip
See Warning
Sleeve (s)
Tip
See Warning
Balanced Output
Tip
Ring
Sleeve (s)
Tip
Ring
LR A
UDIO
A
UDIO
LR
Connect the sleeve to ground (Gnd). Connecting the sleeve to a
negative (-) terminal will damage the audio output circuits.
The gain can be set separately for each input channel so that there is no
audible difference in level when switching between inputs. See chapter three,
“Operation and Configuration”, for information on adjusting the audio
output level via LCD menu and front panel controls. See chapter four, “Serial
Communication”, for information on using the Simple Instruction Set (SIS)
commands and the Windows-based control/configuration program to adjust
audio levels and to set audio breakaway.
The Fixed audio output and the Variable audio output are simultaneously
active, therefore two devices can be connected at the same time. Both outputs
carry the same input’s audio signal.
Outputs