Extron Electronics SW8_12 VGA Ars User Guide - Manual (Page 18)

2-9 SW8/12 VGA Ars • Installation and Operation
Audio output connections
The switcher have two 3.5mm 5-pole captive screw audio output ports.
The Fixed port delivers a fixed volume, stereo balanced/unbalanced audio output.
The Variable port delivers a variable volume, stereo balanced/unbalanced audio
output. The volume range is 0 (-84 dB) through 100 (0 dB). The default volume
setting is 100 (0 dB). Volume is controllable only via the RS-232 port.
RS-232
SW12 VGA Ars 1
2
FIXED VARIABLE
L R L R
O
U
T
P
U
T
S
Audio output ports
Figure 2-10 — Audio output ports
Wire the captive screw connectors as shown below.
C Connect the sleeve to ground ( _ ). Connecting the sleeve to a
negative (-) terminal will damage the audio output circuits.
Do not tin the wires!
Unbalanced
Stereo Output
Tip
NO GROUND HERE.
Sleeve(s)
Tip
NO GROUND HERE.
Balanced
Stereo Output
Tip
Ring
Tip
Ring
Figure 2-11 — Captive screw connectors
N A balanced audio output provides a +6 dB gain. An unbalanced audio output
provides a 0 dB gain.
Remote control connection
An RS-232 serial control port at the right edge of the rear panel is used for computer
or infrared (IR) remote control of the device. The switcher’s firmware can be
upgraded through the RS-232 port. See chapter 3, “Operation and Control”.
The RS-232 port communications protocols are: 9600 baud, 8 data bits, 1 stop bit,
no parity, and no flow control.
IR remote control requires use of the IR 102 Remote Control Kit (part #70-224-01)
For computer or infrared remote control, only pins 2 (transmit data), 3 (receive
data), and 5 (ground) are required. Disconnect all other conductors in the
attachment cable for proper operation.
RS-232
SW12 VGA Ars 1
2
FIXED VARIABLE
L R L R
O
U
T
P
U
T
S
RS-232 control port
DB9 Pin Locations
Female
5 1
9 6
Figure 2-12 — RS-232 control port