Manual
Table Of Contents
- Analogue Redbox User Handbook rev 1.92
- Contents
- Figures
- Warranty, Safety & Installation Information
- RB-MA1 Single & RB-MA2 Dual Microphone Amplifiers
- RB-SM1 Single & RB-SM2 Dual Stereo To Mono Converter
- RB-UL1 Single, RB-UL2 Dual & RB-UL4 Quad Stereo Unbalanced
- RB-LU4 Quad Stereo Balanced To Unbalanced Converter
- RB-BL2 Single & RB-BL4 Dual Bi-Directional Matching Converte
- RB-SL2 Twin Mono, or Stereo, Limiter
- RB-DA6 6 Way Stereo Distribution Amplifier
- RB-HD1 Stereo Headphone Amplifier
- RB-HD6 6 Way Stereo Headphone Distribution Amplifier
- RB-SD1 Silence Detection Unit
- RB-PMX4 10 Input, 4 Output Analogue Preset Mixer
- RB-LI2 Stereo Line Isolation Unit
- RB-PLI6 6 Way Mono Passive Line Isolation Unit
- RB-SS10 10 Way Stereo Analogue Source Selector/Mixer
- RB-LC3 3 Way Light/Power Controller
- Glossary
- Connectors And Cabling
- Index
Chapter 10 - RB-SD1 Silence Detection Unit
Redbox User Handbook 10-7
10.4.3. Main and Aux indicators
On the front panel there are four Main indicators and four Aux indicators. Each
left/right channel has a Program Content and Alarm Status indicator. The Program
Content Indicator represents the input signal level for that channel and the Alarm
Status LED indicates when the channel has dropped below the threshold for longer
than the time selected.
Both the Main and Aux inputs are continuously monitored so that you can check that
your backup signal is operating correctly, as well as your main input source.
Note: Although one channel of the stereo input may have alarmed, the main alarm
may not be set, due to the setting of the Stereo/Mono Dipswitch.
10.4.4. Alarm Indicator
The Alarm indicator situated on the front panel is used to display the alarm status of
the Main input. Its operation is dependant on the selected mode. When in stereo
mode the unit alarms on a single main channel timeout, and in mono, alarms on both
main channels timing out. The unit exits the alarm state on the return of the main
source signal, depending on the setting of the Stereo/Mono Dipswitch. The alarm
indicator is remotely indicated on pins 1 and 2 of the remotes connector.
10.4.5. Restore Button
The restore button is used for restoring the main source signal when the unit is
operating in Manual Mode. When the main source signal returns after it has timed
out, the Mode LED flashes, indicating that the source signal can be restored. When
the Restore button is pressed the main source returns. This can be remotely
controlled using pin 7 of the remotes connector.
10.4.6. Additional Modes
An option to set the unit in different modes of operation is available and is selectable
when the unit is powered on. There are currently four modes of operation, and are as
follows: Normal Mode, Remote Stop Mode, Remote Alarm Set Mode and Signal
Detection Mode: -
Normal Mode is as described previously for normal machine power-up.
Remote Stop Mode operates as follows. When the main source returns from an
alarmed state, pin 4 on the remote connector (Aux Alarm NC) closes to Pin 11 (Aux
Alarm Common) for half a second. (Note: this will only occur when the Remote Start
Mode Switch is set on (page 10-4) and whilst in Remote Stop Mode, the Aux alarm is
not available to indicate the presence of audio on the auxiliary input).
Remote Alarm Set Mode operates as follows. When the RESTORE pin on the remote
connector (pin 7) closes to the DIGITAL GROUND pin on the remote connector (pin 8)
the unit will immediately enter an alarmed state and switch to the auxiliary input.