Redbox RB-DSD8 User Handbook
1
1
INTR
ODUC
TION
INTRODUCTION
1. Introduction
Fig 1-1: RB-DSD8 Front Panel
The RB-DSD8 8 channel silence switcher works in a similar way to the Sonifex
RB-SD1 and RB-DSD1 but allows for 4 stereo channels of audio. These stereo audio
channels can be either analogue or digital and can be used independently to give 4 stereo
silence detectors or they can be linked to handle multichannel audio inputs. Designed to
switch from one input (or set of inputs) to another in the event of loss of audio, the unit is
ideal at transmitter sites, or after the master output of a studio, to switch in another audio
source, or simultaneous broadcast, should a master source fail.
The unit can switch:
•
On loss of level of the main input.
•
On loss of level on one channel of the main input.
•
On loss of synchronisation lock of a main digital input.
The audio inputs can accept both digital and analogue connections, with the unit
automatically recognising a digital input and setting both that pairs input to the digital
signal. By setting the appropriate DIPSwitches each stereo output can be designated as
either an analogue pair or as a digital output, thus making the RB-DSD8 incredibly flexible
and suitable for many different applications. The unit level settings are in dBFS but when
using analogue signals the equivalent full scale value can be set to +24dBU, +18dBU, or
+12dBU by DIPSwitches.
Each stereo pair has individual settings and controls and when stereo signals are linked
the foremost pair determines the switching characteristics and controls to be used. Each
stereo pair has an AES LED that shows the status of the digital audio on that channel and a
selection LED to show which input is currently being sent to each respective output.
Two Presence LEDs for the left and right inputs of each stereo pair indicate the input level
of the channels.
The unit can switch between sources automatically or manually at the push of a button.
If switching manually, silence detection is disabled and the user chooses when to switch
using the main or backup buttons. If switching automatically, the unit will switch between
the two sources automatically upon the detection of silence. Each pair can be set to switch
manually or automatically and the current setting is indicated by the mode LED. Link/
Select buttons are used to group channels to access multichannel operation. Each pair has
a Link/Select button which illuminates blue when active. Pressing and holding the first
Status
Buttons
Channel Controls
& Indicators
Rear Panel
DIPSwitch Indicators
Reset Button
