Extron Electronics MVX Plus 128 VGA A User Guide - Manual (Page 73)

3-47 MVX Plus 128 VGA A Matrix Switcher • Operation
PRELIMINAR
Y
Optimizing the Audio
Each individual input audio level can be adjusted within a range of -18 dB to
+24 dB, so there are no noticeable volume differences between sources and for the
best headroom and signal-to-noise ratio. Adjust the audio gain and attenuation as
follows:
1 . Connect audio sources to all desired inputs and connect the audio outputs to
output devices such as audio players. See “Audio connections”, in chapter 2,
“Installation”. For best results, wire all of the inputs and the outputs
balanced.
2 . Power on the audio sources, the switcher, and the audio players.
3 . Switch among the inputs (see “Creating a configuration”, in this chapter),
listening to the audio with a critical ear or measuring the output audio level
with test equipment, such as a VU meter.
4 . As necessary, adjust the input audio level of each input (see “Viewing and
adjusting the input audio level”, in this chapter) so that the approximate
output level is the same for all selected inputs.
5 . As necessary, adjust the output audio level of each input (see “Viewing and
adjusting the output volume”, in this chapter).
Troubleshooting
This section gives recommendations on what to do if you have problems operating
the switcher and it describes an actual image problem that Extron has encountered.
1 . Ensure that all devices are plugged in and powered on. The switcher is
receiving power if one of the front panel Power Supply LEDs is lit green.
2 . Check to see if one or more outputs are muted.
3 . Ensure an active input is selected for output on the switcher.
4 . Ensure that the proper signal format is supplied.
5 . Check the cabling and make corrections as necessary.
6 . Call the Extron S 3 Sales & Technical Support Hotline if necessary.