Extron electronics CrossPoint 450 Plus 2412 HV, Руководство пользователя

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3-47
CrossPoint / MAV Matrix Switchers • Operation
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 first step of volume increase causes the Input 1 button to blink (slowly, in
the case of switchers with 12 input buttons). Attenuation is reduced by 13 dB
(63 dB of attenuation is applied to the output).
• The second step of volume increase reduces the attenuation by an additional
1 dB (62 dB of attenuation is applied to the output). (On switchers with 32
input buttons the Input 1 button lights steadily.)
• Successive steps of volume increase cause consecutive buttons to first blink,
then light steadily. (On switchers with 32 input buttons, each consecutive
button indicates a 1 dB attenuation reduction when blinking and a 2 dB
attenuation reduction
when lit.)
For example : When lit steadily, the Input 3 button indicates the following,
depending on the number of input buttons the switcher has:

Switchers with 12 input buttons — 47 dB of attenuation when compared
to the Input 3 button blinking quickly (48 dB to 50 dB of attenuation).
The blinking Input 4 button (45 dB to 46 dB of attenuation) is at least 2 dB
less than the fast blinking Input 3 button (48 dB – 46 dB) and at most 5 dB
less (50 dB – 45 dB).

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 fast blinking Input 3 button (53 dB – 51 dB) and at most and at
most 6 dB less (55 dB – 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 - 57 dB).
• On switcher with 32 input buttons , the buttons’ volume indications are
additive.
For example : Input 1 lit ( 23 dB [22 dB + 1 dB] of attenuation reduction ), Input
2 lit ( 2 dB [1 dB + 1 dB] of attenuation reduction ), and Input 3 blinking ( 1
dB
of attenuation reduction ) indicate that the output attenuation has been
reduced by a total of 25 dB ( 22 dB + 2 dB + 1 dB = 25 dB ).
• At full volume, no attenuation is applied to the output and all input buttons
are lit steadily.
See the table on page 3-46 to read the volume display.