SW6 VGA Audio • Installation and Operation
Installation and Operation
1
The
SW6 VGA Audio
is a 6 input - 1 output audio/video switcher housed in a rack mountable, 1U high, full
width metal enclosure with internal, universal 100-240 VAC 50/60 Hz power supply. The switcher front and
rear panels are shown in Figure 1-A followed by descriptions of controls and connectors.
A Power
LED - ON if AC power applied. (also see item F)
B
Six Input Select Buttons and LEDs - Used to select an input in Manual mode.
Hold button 1 and press and hold NORM (Normal = Manual) or AUTO (Autoswitch) button to select Mode.
Buttons 5/6 are used to increase/decrease audio setting w/Audio LED ON.
C
AUDIO Button/LED - Used to set/indicate audio view/adjust operation.
D
±dB LEDs - Indicates polarity of Audio Level setting.
E
IEC AC Power connector - 100-240 VAC 50/60 Hz, 0.3 amps maximum.
F Power
LED - ON if AC power applied. (also see item A)
G
Six VGA input connectors - Up to six VGA inputs may be connected.
H
VGA output connector - Selected VGA input available at this connector.
I
Six audio input captive screw connectors.
J
Audio output captive screw connector.
K REMOTE
connector - Used for RS-232 and/or Contact Closure control.
Operating Modes -
The SW6 VGA Audio switcher operates in Manual or Autoswitch Mode (see item B
above). Input selection in Manual mode may be done using Input select buttons 1 - 6 on the front panel or
through the rear panel Remote connector (contact closure or RS-232). In Autoswitch Mode the switcher
automatically selects the highest number input that has sync pulses available while blocking input selection
by the front panel switches or through the Remote connector.
Connection Diagram
- The connection diagram in Figure 1-B shows four PC computers and two M
AC
computers (with cable adapters) connected as inputs to the SW6 VGA Audio switcher. A projector is shown
connected to the switcher output.
F
IGURE
1-A
F
IGURE
1-B
__ Do not connect equipment that uses phantom power.
__ If using Unbalanced Output example above (shaded background), connect the sleeve(s) to
Ground (Gnd). Connecting it to a negative (-) terminal will damage audio output circuits.
NO Sleeve means NO CONNECTION!
__ There is no physical way to prevent you from plugging an audio connector partially in one
input and partially in the adjacent input. Align the Audio connectors carefully before
plugging them in to avoid circuit damage.
F
IGURE
2-A
F
IGURE
2-B
F
IGURE
2-C
Gnd
Gnd
Tip
S
LEEVE
(
S
)
Tip
U
NBALANCED
O
UTPUT
(high impedance)
NO
SLEEVE
L
R
L
R
T
IP
T
IP
S
LEEVE
S
LEEVE
U
NBALANCED
I
NPUT
(high impedance)
NO
SLEEVE
Gnd
B
ALANCED
O
UTPUT
(high impedance)
B
ALANCED
I
NPUT
(high impedance)
Gnd
Gnd
B
ALANCED
O
UTPUT
(600 ohms)
Gnd
R
ING
T
IP
S
LEEVE
(
S
)
R
ING
Tip
R
ING
T
IP
S
LEEVE
(
S
)
R
ING
Tip
600
B
ALANCED
I
NPUT
(600 ohms)
600
L
R
L
R
L
R
L
R
R
ING
T
IP
S
LEEVE
(
S
)
R
ING
Tip
R
ING
T
IP
S
LEEVE
(
S
)
R
ING
Tip
Tip
Sleeve
Ring (-)
Tip (+)
Sleeve
L
R
2
3
L
R
F
IGURE
2-D
Using the Captive Screw Audio Connectors
The SW6 VGA Audio switcher has a single row of 3.5 mm audio receptacles along the bottom right side of the
rear panel (see items I & J, Figure 1-A) with six inputs labeled L 1 R through L 6 R, and one output. Each audio
receptacle has five contacts, and is labeled for left (L), right (R), polarity (+/–), ground, and the input numbers
plus the output.
Captive screw audio connectors (3.5 mm) are supplied (P/N 10-319-10) with the switcher, one for each input
and one for the output. Connectors must be wired to the audio cables using the captive screws inside the
connectors (F
IGURE
2-B). Each audio connector will then be plugged into the appropriate input or output position
on the rear panel. Figure 2-C shows three methods of wiring the connectors, depending on your system, with
input examples across the top and output examples below.
When making connections for the SW6 VGA Audio switcher from existing audio cables, see Figure 2-A. The
round audio connectors are shown with the top one (tip and sleeve only) for unbalanced audio and the bottom
one (tip, ring and sleeve) for balanced audio. The "ring", "tip" and "sleeve" markings are also used on the
captive screw audio connector diagrams in Figure 2-C. Together, these examples may be used as a guide for
terminating audio cables.
Remote Control
The REMOTE connector enables the
switcher to be controlled from an
RS-232 Host device/system or a
contact closure device such as
Extron’s IR-20 Infrared Remote Control.
RS-232 and Contact Closure REMOTE connector pin
assignments are shown to the right. To select an input through the Remote connector contact closure pins,
momentarily
1
connect the pin for the desired input number (#) to logic ground (pin 5).
Extron's Windows Compatible Software
UNIVSW is Extron's Windows
®
3.1 and Windows 95 compatible program which may be used to control switcher
input selection, audio adjustments and mode selection (Manual or Autoswitch). It is supplied on a CD-ROM
from which it must be installed onto and launched from the hard drive.
To install the software onto the hard drive (it will occupy approximately 1 MB of hard disk space), run
LAUNCH.EXE from the CD. To run UNIVSW from the hard disk, double-click on the UNIVSW program icon in
the Extron Electronics group or folder. For information about program features, double-click on the UNIVSW
Help icon in the Extron Electronics group (or folder) or press the F1 key after UNIVSW is loaded.
Command/Response Table
The Command/Response table on Page 3 lists those commands which the SW6 VGA Audio switcher
recognizes as valid and the responses that will be returned to the Host. Error responses/causes and switcher
initiated messages are listed at the bottom of the table.
1
Duration of a momentary connection is defined as 100 milliseconds for the SW6 VGA Audio switcher.
2
SW6 VGA Audio • Installation and Operation
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