Manual

Chapter 10 - RB-SD1 Silence Detection Unit
10-2 Redbox User Handbook
Front panel LED indicators show individually left and right programme and alarm
conditions for both the main and auxiliary inputs. The status of the source, mode and
alarm state are also shown on the front panel with LED indicators.
Additionally, the RB-SD1 can be programmed for specific applications, which can be
defined on power-up of the unit. Contact Sonifex for further information if you have a
particular requirement.
The RB-SD1 has been designed to have a passive signal path through the main input,
so if power to the unit fails, the signal input will still be routed through to the output.
This is essential for applications such as installation at transmitter sites, where a
power failure to the unit should not prevent the audio input signal from being output
to the transmitter.
10.2. System Block Diagram
Fig 10-2: RB-SD1 Block Diagram
Mode Restore
Push
Switch
Main Channel
Select
Push
Switch
Reference
Voltage Select
Monitored
Channel Select
A/B
Switch
Control
Output
Select
Summing
Amp
Summing
Amp
Digital
Pot
Control
Comparator
Stereo Input B
Stereo Input A
Professional
Balanced
Professional
Balanced
Left
Right
Left
Right
Stereo Output
Professional
Balanced
Left
Right
Output Select
Default/Power Off
Select Input A
(
)
Microprocessor
0...9,A...F
Time Select
0...9,A...F
Mode Select
15 PIN
Remote
Connector