Manual

2
Redbox RB-DDA22 User Handbook
INTRODUCTION
INTRODUCTION
1
Operating Mode
In ‘operating mode’, the central button LED is unlit. The unit selects this mode when a valid
input signal has been present and no button presses have been made for 8 seconds. The
LEDs around the button illuminate amber to directly indicate the following frequencies 32,
44.1, 48, 88.2, 96, 176.4 & 192 kHz. If the input is at a non-standard frequency then the unit
will indicate both the frequencies either side of the incoming frequency – e.g. if the input
signal has a frequency of 64kHz then both the 48kHz and 88.2kHz LEDs will be illuminated.
If the frequency is below 32kHz or above 192kHz then the appropriate LED will ash.
Input Select Mode
Pressing the INPUT SELECT central button illuminates it red and allows you to select the
required input. Pressing the button will step the selected input to the next input selection
including auto mode.
In Input Select Mode the LEDs have the following states:
O – Signal not selected and no valid signal present
Green – Signal not selected and valid signal present
Red – Signal selected and no valid signal present
Amber – Signal selected and valid signal present or Auto Mode Selected
Note: Input Select mode is chosen automatically when the selected input is not present.
Auto Select Mode
In this special input select mode the unit will hunt through all the inputs until it nds a valid
signal. If multiple signals are present you can force selection of the next input by holding
the input select button down for 2 seconds, when the next valid input will be selected.
System Block Diagram
Fig 1-3: RB-DDA22 System Block Diagram
Digital Audio
Transmitter
Digital Audio
Transmitter
Digital Audio
Transmitter
Digital Audio
Transmitter
Digital Audio
Transmitter
Digital
Audio
Receiver
&
Input
Select
AES/EBU
XLR3
AES3id
BNC
AES/EBU
RJ45
S/PDIF RCA
Phono
TOSLink
Optical
AES/EBU
XLR3
AES3id BNC
AES/EBU
RJ45
S/PDIF RCA
Phono
TOSLink
Optical
Circuit Replicated 6 Times
Circuit Replicated 6 Times
Circuit Replicated 6 Times
Circuit Replicated Twice
Circuit Replicated Twice