Extron electronic MVX 88 Series - Manual (Page 17)

2-5 MVX 44 / 48 / 84 / 88 VGA Matrix Switchers • Installation
PRELIMINAR
Y
Video and audio output connections
b
RGB video output connectors — Connect RGBHV video
displays to these 15-pin HD female connectors for each output.
N The MVX switchers can also switch RGBS, RGsB, RsGsBs, or
component/HDTV video.
N The MVX switchers do not alter the video signal in any way. The signal output
by the switcher is in the same format as the input.
c
Balanced or unbalanced audio output connectors — These 3.5 mm, 5-pole
captive screw connectors output the selected unamplified, line level audio.
Connect audio devices, such as an audio amplifier or powered speakers.
Figure 2-4 shows how to wire the captive screw audio connector. The
connector is included with the interface, but you must obtain the cable.
Insert the wires into the appropriate openings in the captive screw connector.
Tighten the screws on top to fasten the wires. Use the supplied tie-wrap to
strap the audio cable to the extended tail of the connector.
Unbalanced Stereo Output Balanced Stereo Output
L
R
Do not tin the wires!
Ring
Sleeve(s)
Tip
Tip
Ring
Sleeve(s)
Tip
Tip
NO GROUND HERE.
NO GROUND HERE.
Figure 2-4 — Captive screw connector wiring for audio output
C Connect the sleeve to ground (Gnd). Connecting the sleeve to a negative (-)
terminal will damage the audio output circuits.
C The length of the exposed (stripped) portion of the copper wires is important.
The ideal length is 3/16” (5 mm). Longer bare wires can short together.
Shorter bare wires are not as secure in the direct insertion connectors and
could be pulled out.
N Figure 2-4 shows two methods of wiring the connectors for output. A mono
audio connector consists of the tip and sleeve. A stereo audio connector consists
of the tip, ring, and sleeve. If you are wiring a captive screw connector from an
existing unbalanced audio cable, the white insulated wire is typically the left
channel (tip) and the red insulated wire is typically the right channel (sleeve).
There is no reliable standard for existing balanced audio cables.
The audio level for each input can be individually set, via the front panel or
RS-232, to ensure that the level on the output does not vary from input to
input. See chapter 3, “Operation”, and chapter 4, “Remote Operation”, for
details.
By default, the audio follows the video switch. Audio breakaway, which is
commanded via the front panel, via RS-232 control using SIS commands or
the Windows-based control program, or via optional IR 501 control, allows
you to select from any one of the audio input sources. For details, see
chapter 3, “Operation”, and chapter 4, “Remote Operation”, and refer to the
IR 501 User’s Guide.