Audio Mute (Output 1 Only); Resetting The Unit; Hardware Reset Modes - Extron electronics MPX 423 A User Manual

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Audio mute (Output 1 only)

Audio outputs

Resetting the Unit

Hardware reset modes

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The volume adjustment is speed sensitive. To avoid large audible volume jumps
when the volume knob is turned quickly, the volume changes by smaller steps.
The Mute button toggles between mute and un-mute for audio output 1. The
indicator LED to the right of the button lights when the audio is muted. If a muted
output is not at maximum attenuation, it is disconnected. Press the Audio Mute
button again to un-mute the output and return to the previous output level.
Control of audio output 2 is available through RS-232 or Ethernet/Telnet only.
Balanced or unbalanced audio output is available on the MPX 423 A using a
3.5 mm, 5-pole captive screw connector. Refer to the following illustration for
proper wiring.
Tip
See caution
Sleeve Sleeve (s)
Tip
See caution
Unbalanced Output
Figure 2-5 — 3.5 mm, 5-pole captive screw audio connectors
Connect the sleeve to ground (Gnd). Connecting the sleeve to a negative
CAUTION
(-) terminal damages the audio output circuits.
There are four reset modes activated by the Reset button in the back of the unit.
The Reset button is recessed, so use of a pointed stylus, ballpoint pen, or Extron
Tweeker is suggested.
The I/O button on the front panel also has limited reset capabilities, described on
the following page.
The reset modes listed below close all open IP and Telnet connections, and
CAUTION
all sockets.
If the Reset button is continuously held down, the rear panel LED pulses
(blinks) every 3 seconds and puts the unit in a different mode (corresponding
to the underscored notes in Modes 3 through 5). The third blink indicates the
last mode, Mode 5, so the LED blinks three times. The following modes are
listed as separate functions, not as a continuation from Mode 1 to Mode 5.
Mode 1: Holding the Reset button while applying power defaults the unit back to
the base firmware that shipped with the unit from the factory. Event scripting
does not start when the unit is powered on in this mode. This allows you to
recover a unit that has incorrect code or updated firmware running. All user
files and settings are maintained. User Web pages may not work correctly if
the unit is using an earlier firmware version.
Tel. 07131 911201
Fax 07131 911203
Tip
Ring
Tip
Ring
Balanced Output
ce-info@camboard.de
MPX 423 A • Operation 3-7