SRC
If the digital inputs are fed from two different sources with sampling
rates other than 48/96 kHz, a Sample Rate Converter («SRC»)
can be enabled.
Note: Please note that this will result in a slightly increased
basic latency Þ £ 1 ms.
12.2.2. Input settings
Selecting «Input settings» at the bottom of the «Input» tab opens
the corresponding subscreen.
The «Input settings» screen provides access to the following input
related functions:
▪ Input monitoring (Mon)
▪ Input gain (Gain)
▪ Fallback
▪ Override
The on/off status of each function is indicated by change in color
of the respective button from grey to blue or vice versa.
Below these buttons, there is a graphical presentation of the actual
input routing.
12.2.2.1. Input monitoring
Selecting «Input monitoring» from the «Input settings» menu opens
the corresponding subscreen.
The d&b "Input monitoring" function enables the amplifier to
monitor all signals, either from analog and/or digital signal
sources, fed to the respective input (Þ «Input»). If one or several
signals fail, a corresponding error can be generated and reported
to the user or system.
At the signal source, an additional external pilot signal (sine wave
signal) is added (summed) to the source signal.
Within the amplifier, this pilot signal can be detected (Þ «Mode»
Þ «Pilot») using an adjustable bandpass filter (Þ «Frequency»).
As long as the pilot signal is permanently and safely present within
the given pilot band, this is an indication that the incoming signal
path is faultless.
For this purpose, the amplifier determines the level of the pilot
signal within the pilot band. The result is then compared with an
adjustable reference threshold set by the user (Þ «Threshold»). If
the level of the pilot signal falls below the reference threshold, a
time-related error can be generated (Þ «Detection time»).
The pilot signal can be removed from the source signal (program
signal) at any time using a notch filter (Þ «Notch filter»).
d&b 10D/30D Manual 1.10 en40
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