Extron electronics MTPX Plus Series, User Manual

Page: 72 / 190

Operation, cont’d
MTPX Plus Twisted Pair Matrix Switchers • Operation
3-40
Viewing and adjusting the local output volume
The audio level of each local output can be displayed and adjusted through a range
of 100% (no attenuation) to 0% (maximum [76 dB] attenuation). The audio level can
be adjusted from the front panel or under RS-232/RS-422 or Ethernet control. The
default volume is 100% (no attenuation).
N Output volume is protected when front panel
Lock
mode 2 is selected. You can
view the volume in
Lock
mode 2 but you cannot adjust it from the front panel.
See “Setting the front panel Locks ( Executive modes)” on page 3-46.
1 . Press the Esc button to clear any input buttons, output buttons, or control
buttons that may be lit.
2 . To enter Audio mode, press and hold the Audio button until the button begins
to blink red, then release the button.
3 . Press and release an output button to select an output. The input buttons
display the volume level for the selected output. As a general rule, the more
buttons that are lit, the higher the volume. The fewer buttons that are lit, the
lower the volume.
For a more detailed analysis of decoding the displayed value, see “Reading
the displayed volume”, below.
4 . Press and release the Esc ( > ) and View ( < ) buttons to increase and decrease
the audio volume.
5 . Press and release the Audio button to save the audio settings and exit the
Audio mode. The Audio button stops blinking.
N • Only the volume for the local audio outputs (outputs 1 through 4 [matrix
sizes 816, 168, and 1616] or outputs 1 through 8 [matrix sizes 1632, 3216,
and 3232]) is adjustable. Outputs outside the local range cannot be selected
in step 3 .
• There is one audio volume level setting per local output. The audio level
setting is shared by the left and right audio inputs.
• The audio volume levels are stored in non-volatile memory. When power is
removed and restored, the audio level settings are retained.
• Exiting Audio mode by pressing the Audio button always returns the
I/O buttons to Video lit green and Audio lit red.
• Pressing the Enter or Preset button also exits Audio mode. Pressing the
Preset button changes to Recall Preset mode.
Reading the displayed volume
N
This section is a detailed look at reading the output volume display on the
switcher’s front panel. If you do not need to read the exact value of the volume
setting, skip this section.
There are 65 steps of volume attenuation, with 1 dB per step (button push), except
for 0-to-1, which is 13 dB. At maximum attenuation, no input buttons are lit,
76 dB of attenuation is applied, and the audio output is effectively muted. At no
attenuation, all input buttons are lit and the output volume is equal to the input
signal plus any gain or attenuation that is applied to that specific input using the
input audio level adjustment. See “Viewing and adjusting the TP input audio
level”, on page 3-34. See the table on the next page to read the volume display for
each display scheme.