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Operation, cont’d
TPX 88 Matrix Switchers • Operation3-24
4. Slowly rotate the volume knob clockwise (figure 3-41). Note the output
button indication changes that occur as you rotate the knob.
Turn the volume knob slowly. The encoder will not reliably recognize the
level change if you turn the knob too quickly.
Figure 3-41 shows the result of increasing the audio volume level by a total of
up to 56 percent.
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VOLUME
The input buttons display the selected output's audio volume level.
Each lit input button indicates up to 14 percent of the total input volume is applied to the output. Each unlit
or background illuminated input button indicates 1 dB to 7 dB of attenuation is applied to the output.
In this example, the green input buttons indicate that the switcher is outputting approximately 84 percent of
the applied audio input. The unlit input buttons indicate an audio volume attenuation of approximately
14 dB.
14% 28% 42% 56% 70% 84%
= Unlit
(up to 7 dB of attenuation)
= Lit
(up to 14% of input signal output)
Rotate the volume knob.
Figure 3-41 — Adjust the output audio volume
5. Press and release the Audio button (figure 3-42).
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VIDEO
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 3-42 — Deselect audio mode