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Redbox User Handbook No 1
the unit to analogue or digital video signals. A front panel DIPSwitch block is used to
decide whether the unit is synchronised to Input1, Input2, the AES/EBU sync input, the
wordclock sync input or an optional video sync board. A front panel SYNC button selects
the synchronisation mode of the unit and the button flashes whenever the unit is not
synchronised to an incoming sync signal. Selectable sync modes are as follows:
Master Mode
In this mode the digital output sample rate is simply set by, and locked to, the internal on-
board clock generator. No sync signal is used or required.
Auto Sync Mode
In this mode the digital output sample rate follows the selected sync input. When the sync
signal is not present the output sample rate will be set by, and locked to, the internal on-
board clock generator at the selected output frequency.
Auto Lock Mode
In this mode no output will be generated until lock is achieved with a sync signal. The
digital output sample rate now follows the sync input. If the sync signal is removed then the
output sample rate will be set by, and locked to, the internal on-board clock generator at
the closest frequency available to the previous sync input.
Slave Mode
In this mode the digital output sample rate follows the sync input. When the sync signal is
not present the digital output is turned off.
The unit can operate in 2 modes - automatic or manual, selectable using a rear panel
DIPSwitch. In both modes it will automatically switch over to the auxiliary source on
detecting silence. When the main signal is again detected it will either return to the main
signal automatically or manually depending on the mode chosen. In manual mode, the
front panel RESTORE button is used to return to the main signal.
The RB-DSD1 has a number of remote operational features. Remote outputs provide
separate relay contact closures for failure of the main and auxiliary inputs. You can also
remotely select between auto and manual mode (with tally output), action the signal
RESTORE, set the silence detection delay to be 2mins 5 seconds and define which input
is the main input (with tally output). You can remotely start and stop another piece of
equipment on alarm failure and there is an option to set the remote start output as either
momentary or latched.
The unit can be configured to alarm when either the left or right channel of the main
input source fails, or if the whole stereo signal fails. Additionally, if one channel of a stereo
signal is lost, you can define whether to mute the lost channel, or whether to mix the
remaining channel to the lost side, effectively creating a mono signal. If the main source
synchronisation is lost, you can define whether the unit switches to the auxiliary input in the
minimum time (2 seconds), or whether to treat the signal as silence to be detected and then
switched based on the unit’s silence detection settings.
10
SYNCHRONISERS, DELAYS &
SILENCE DETECTORS
SY
NCHR
ONISERS, DEL
A
Y
S & SILENCE DE
TEC
TORS - RB
-DSD1
