Manual

Chapter 6 - RB-SC1 Sample Rate Converter
6-4 Redbox User Handbook
6.4.1.5. S/PDIF Output
The digital output S/PDIF phono output has an impedance of 75 ohms.
6.4.2. Rear Panel Controls
6.4.2.1. Status Select Switches
These switches are used to determine the content of the channel status bits
embedded within the digital audio stream (switches 1 and 2) and to select the source
for the digital sync signal from either digital audio input or TTL word clock (switch3).
The channel status bits will be forced to Professional Mode for the highest 3 sample
rates as they are not supported
by consumer mode. For the
lowest three rate these status
bits can be either set to follow
the input signal type (switch 1
off) or can be forced to either
professional or consumer mode
(switch 1 on and switch 2 either
off or on). These settings are
summarised in Fig 3-4 and are
also on top of the unit.
Fig 6-4: RB-SC1 Status Switches
6.4.2.2. Digital Input Select Buttons
These buttons are used to switch the digital connection between the AES/EBU XLR
connector (button out) and the S/PDIF phono connector (button in) for the digital
source, the digital sync input and the digital output
6.4.2.3. Frequency and Sync Mode Rotary Switch
This rotary switch is used to select the synchronisation mode and to select the
frequency of the digital output when using the on-board clock generator. There are 4
modes of operation :- Master mode, Auto Sync Mode, Auto Lock Sync Mode & Slave
Mode.
In Master sync mode, switch positions 0 – 5, 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.
In Auto sync mode, switch positions 6– B, the digital output sample rate follows the
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 a frequency determined by the
switch position.
In Auto-Lock sync mode, switch position C, no output will be generated until lock is
achieved with a sync signal. The digital output sample rate now follows the sync input.
1ON
1OFF
2ON
2OFF
3ON
3OFF
WORD CLOC K SYNC
STATUS
PROFESSIONAL OUTPUT
CONSUMER OUTPUT
DIGI T
A
LS
Y
NC
FORCE CHANNEL STATUS TYPE
FOLLOW INPUT