Extron Electronics TPX 88 A User Guide - Manual (Page 47)

3-21 TPX 88 Matrix Switchers • Operation
3 . Press and release the input 5 button (figure 3-36).
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Green
Press and release the input 5 button.
The button lights to indicate that the input 5 audio is selected.
The output buttons display the selected input's audio level and polarity (gain or attenuation).
When the buttons are lit green, they indicate a gain (+) audio level.
When the output buttons are lit red, they indicate an attenuation (-) level.
In this example, the output buttons display an audio gain level of +8 dB.
= Unlit (0 dB)
= Lit (3 dB)
= Slow blink (1 dB)
= Fast blink (2 dB)
B1 B1 B1
B2 B2 B2
B2 B2 B2
Green Green
Figure 3-36 — Select an input
4 . Slowly rotate the volume knob counterclockwise (figure 3-37). 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 3-37 shows the result of reducing the audio level a total of 9 dB. Note
that the level is now displayed in red to indicate a negative level.
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VOLUME
Rotate the volume knob.
The output buttons display the selected input's audio level and polarity (gain or attenuation).
When the buttons are lit green, they indicate a gain (+) audio level.
When the output buttons are lit red, they indicate an attenuation (-) level.
In this example, the output buttons display an audio gain level of -1 dB.
= Unlit (0 dB)
= Lit (3 dB)
B1 B1 B1
B2 B2 B2
B1 B1 B1
Red
= Slow blink (1 dB)
= Fast blink (2 dB)
Figure 3-37 — Adjust the input audio level
If another input button is pressed and released, the level value for the current
input is saved and the level value for the newly selected input is displayed.