A SERVICE OF

logo

Open as PDF
next previous
Operation, cont’d
MTPX Plus Twisted Pair Matrix Switchers • Operation
3-42
Depending on the switcher model, the input buttons blink or light sequentially
to indicate the approximate volume of the selected output. Volume is defined as
a percentage of the input audio signal that is applied to the output. From 0% of
volume, the first Esc (
>
) button push applies 5.5% of the input audio signal. From
5.5% on, each Esc (
>
) push applies 1.5% more of the input audio signal to the output:
• Push Esc (
>
) button again — 5.5%+1.5%=7%volume
 Switchers with 16 input buttons — Indicated by the Input 1 button
blinking slowly
 Switchers with 32 input buttons — Indicated by the Input 1 button lit
steadily
• Push Esc (
>
) button twice more — 7%+1.5%+1.5%=10%volume
 Switchers with 16 input buttons — Indicated by the Input 1 button lit
steadily
 Switchers with 32 input buttons — Indicated by the Input 1 and Input 2
button lit steadily
•Push Esc (
>
) button nineteen times more—10%+(19•1.5%)=38.5%volume
 Switchers with 16 input buttons — Indicated by the Input 1 through 5
buttonslitsteadilyandtheInput6buttonblinking
 Switchers with 32 input buttons — Indicated by the Input 1 through
Input 11 buttons lit steadily and the Input 12 button blinking
When all input buttons are lit, the audio output is 100% of the audio input level.
Another way to view the volume level is to think in terms of the attenuation that
is applied to the output. Attenuation reduction is indicated by the lit or blinking
input buttons: when fewer input buttons are lit, attenuation is greater (and the
volume is quieter).
• Atminimumvolume,allinputbuttonsareunlitorbackgroundilluminated
and76dBofattenuationisappliedtotheoutput.Theaudiooutputis
effectively muted.
• TherststepofvolumeincreasecausestheInput1buttontoblinkslowly.
Attenuationisreducedby13dB(63dBofattenuationisappliedtothe
output). There is no change in the volume indication.
• Thesecondstepofvolumeincreasereducestheattenuationbyanadditional
1dB(62dBofattenuationisappliedtotheoutput).Thefrontpaneldisplay
is unchanged.
• Successivestepsofvolumeincreasecauseconsecutiveinputbuttonstorst
blink and then light steadily.
For example: When lit steadily, the Input 3 button indicates the following,
depending on the number of input buttons the switcher has:
 Switchers with 16 input buttons — 52 dB of attenuation when compared
to the Input 3 button blinking (53 dB to 55 dB of attenuation). The
blinking Input 4 button (49 dB to 51 dB of attenuation) is at least 2 dB less
than the blinking Input 3 button (53 dB minus51dB)andatmost6dB
less (55 dB minus 49 dB).
 Switchers with 32 input buttons — 58dBofattenuationwhencompared
to the Input 3 button blinking (59 dB of attenuation). The blinking
Input 4 button (57 dB of attenuation) is 2 dB less than the steadily-lit
Input 2 button (59 dB minus 57 dB).
See the table on the previous page to read the volume display.