Extron Electronics TPX 88 A User Guide - Manual (Page 48)

Operation, cont’d
TPX 88 Matrix Switchers • Operation 3-22
5 . Press and release the I/O button (figure 3-38).
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AUDIO
I/O
All input and output buttons return to unlit or background illumination.
Press the I/O button to exit
audio adjust mode.
The Audio LED goes out.
Figure 3-38 — Deselect audio mode
Viewing and adjusting the output volume (TPX 88 A only)
On the TPX 88 A, the audio level of each local output (the output on the captive
screw connectors) can be displayed and adjusted through a range of 100% (no
attenuation) to 0% (full attenuation). The audio level can be adjusted from the front
panel or under RS-232/RS-422 control.
The volume adjustment does not affect the audio portion of the twisted pair
link output on RJ-45 connectors.
The output level adjustment will not work for a local output that is muted. If
one or more local outputs are muted, press the Mute All button once or twice
as necessary to turn off the Mute All LED.
1 . Press the Esc button to clear any input buttons, output buttons, or control
buttons that may be lit.
2 . Press and hold the I/O button until the Audio LED begins to blink, then
release the I/O button.
3 . Press and release an output button to select an output. The input buttons
display the volume level for the selected output. Each unlit or background
illuminated input button indicates approximately 7 dB of volume attenuation
(whether there is an input associated with the button or not). There are eight
steps displayed, from full attenuation applied (no input buttons lit, or 50 dB
of attenuation) to the full volume output (all input buttons lit, or output
volume equal to the input signal plus any gain or attenuation).
Another way to view the volume level is to realize that each lit input button
indicates up to 14 percent of the input volume is applied to the output. When
all 8 input buttons are lit, the switcher is outputting 100% of the audio input.
4 . Rotate the Volume knob to increase and decrease the audio volume.
5 . Press and release the I/O button to exit the audio display and adjustment
mode. The Audio LED stops blinking.
• There is one audio volume level setting per 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.