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Idiomas disponibles
User-bit volume control (IEC 60958-1) may be used for muting input channels: set gain to -∞. Channel soloing is
also possible by muting the other input channels (must be handled by the source). Channel volume control is not
supported. The source must support the IEC 60958-1 standard for muting and soloing to work – see information
provided by the manufacturer of the source to see how it has been implemented. System volume is still possible
by the using the remote control socket (SRC n or RS-232) to control the analog output VOL control blocks without
having to scale the digital signal.
A common problem in television broadcast facilities is audio-video synchronization. The video signal must be
delayed if the video leads the audio, however normally the video lags the audio so the audio should be delayed.
This can be accomplished using the built-in 8-channel digital delay which is located just before the DACs. A time
delay can be applied equally to all eight input channels to compensate for delayed video signals. This facility is
not designed for compensation of loudspeaker time-of-flight differences as this should be inserted at each
loudspeaker output, not at the input channels to the bass manager. The time length of a frame depends on the
picture frame rate frequency: 50 Hz → 40 ms or 60 Hz → 33 ms. The sample rate is automatically detected and
affects the maximum possible delay – higher sample rates lead to a lower maximum delay. The maximum delay
on a 48 kHz signal is 507 ms, which can compensate over 12 x 50 Hz frames or 15 x 60 Hz frames.
K+H
DIM 4 Set-up
Loudspeaker
Left
Center
Right
Left Surround
Right Surround
Left Back
Right Back
Subwoofer
Read Current Settings
In addition on the DIM 4, the 7 main channels are summed and the LFE input has a 0 / +10 dB gain stage. Finally,
the test signal is routed onto the left input for reproduction by the subwoofer and left loudspeaker (see
Calibrating Phase section).
Warning: The digital input option's BNC connectors protrude from the cabinet's back panel. The circuit board will
be damaged if the cabinet is placed vertically on a flat hard surface with the driver(s) facing upwards (only
recommended when servicing the driver(s)). Find a soft surface, such as bubble wrap, packing foam, or a folded
blanket, or angle the cabinet slightly to avoid applying pressure to the BNC connectors.
Output Card
The output card has seven channels of 4
channels. Following this, there are 7 x XLR electronic-balanced output stages. All outputs (main channels and
sum) have protection to avoid power on/off noises: the outputs turn on after a short delay when mains power is
applied and mute instantaneously when the mains power is removed. The content of each output channel
depends on the content placed on each of analog inputs, or the optional digital input's two subframes (channels).
There is also 80 Hz high pass filtering and summing of the LFE channel to the left and right outputs (more details
of how this is used can be found in the Filter Card section).
Finally, there is a Sum output socket for connecting additional subwoofers into the system. There is no volume
control on this output as volume control is performed locally in each subwoofer. As the output is a filtered sum of
the input channels, it should be connected to the LFE/Sum input on subsequent subwoofers in the system (see
example system diagrams in the System Use section). These should have their LFE mode switch set to
"SUB ONLY (WIDE)" so that double filtering is not applied. As the Sum output is always analog, subwoofers after
the first one in a daisy chain should not have the optional DIM 4 digital input card fitted.
Operating Manual O 810 / O 870
All manuals and user guides at all-guides.com
Level
System Delay
00.0
dB
Delay
00.0
dB
Sample Rate
00.0
dB
Frame Rate Frequency
00.0
dB
Delay per frame
00.0
dB
Frames
00.0
dB
00.0
dB
Communication Port
00.0
dB
DIM 4 setup software
th
order 80 Hz high pass filtering, and a volume control for each of these
200.0
ms
48
kHz
50
Hz
20.0
ms
10.0
▼
COM 1
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