D&R Airlab, Руководство пользователя

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Triple Dig Input Module
Airlab from D&R Phone +31 294 418014, email: info@d-r.nl Page 23
ON
The channel on/off switch operates in tandem with the fader.
There are two methods of activating the channel:
A. Press the `ON' switch (Green LED is on). Then by moving up the fader, the signal is sent to
the master and at the same time a mic-on/channel on indication is sent to the remote
connector.
B. When the 'ON' switch is 'OFF', no LED is illuminated. As the fader is moved upwards, the
channel is put into 'stand-by'.
At this point there is no “mic-on/channel on” signaling or audio to the master. Pressing the 'ON'
switch activates the channel and the green LED is on.
In order to switch the channel and mic-on signaling off, the 'ON' switch should be deactivated, or the
fader closed.
Fader
The fader is an ultra smooth 100mm model controlling the internal high quality VCA's and sending on/off
information to the logic circuitry. There is no audio going through the faders, which guarantees noise free
fading forever! When the fader is closed, the signal is automatically muted, providing a cut-off in excess of
100 dB. This high dB cut-off value ensures that the main output is protected from cross talk from
announcers.
Digital Output:
The Airlab Triple digital input has 2 digital outputs. AES3 on the XLR and S/P-dif on de black cinch.
Dependent on the jumper setting the output is giving the stereo PROG signal or the stereo SUB-signal.
Normal the output level is -9dBFS but the level (headroom) can be adjusted (see also chapter 12).
The digital output frame clock (sample rate) can be setup in two different ways by internal jumper
setting.
1: PLL. Output Frame Clock (sample rate) is identical to the clock signal of the digital input
(Select by the ‘Line B’ switch, 32..96 kHz). If the digital-input is not in lock (no input signal
or a wrong signal) the Output Frame Clock will jump back to 44.1kHz.
2: Fixed. Output Frame Clock (sample rate) is always 44.1kHz
Be wary: In the ‘PLL’ mode the digital output signal will shortly be muted if you change de
digital input selection (‘Line B’ switch) or if the digital input lose lock.
So for a Digital Main output the ‘Fixed’ setting is recommended. At connecting for instance a DAT or
MD player/recorder, the ‘PLL’ setting can be used.
In PLL mode:
In the ‘PLL’ mode the digital output sample-rate is in sync with the digital input.
If no digital input signal is connected or selected (Line-B LED will be RED-flashing) the output
frame clock will be 44.1kHz.
If a digital input signal is connected and selected the Line-B LED well be GREAN (Line B
select) or off (Line A select). The output frame clock well be equal to the digital input frame
clock.
In Fixed mode:
The digital output frame clock will be fixed at 44.1kHz.