Handbook

Table Of Contents
40
Redbox User Handbook No 3
Digital Sync & Output 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) independently for the
digital sync input and the digital output.
Note: There is no switch to select the Word Clock as a sync input. The unit automatically
searches for a sync signal on the Word Clock, or the selected digital input, and
automatically locks to a valid sync clock.
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
digital input. When the digital input 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 digital input signal. The digital output sample rate now follows the
digital input. If the digital input 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 digital input.
• In Slave Sync Mode, switch position D, the digital output sample rate follows the
digital input. When the digital input signal is not present the digital output is
turned o.
The following table, also printed on the top of the unit, summarises the above settings
and shows the sample rate generated by the internal clock generator in master and auto
sync modes.
6
MICROP HONE AMPLIF IERS
& LIMITERS
MICROPHONE AMPLIFIERS & LIMITERS - RB-DMA2