108
Redbox User Handbook No 1
SYNCHRONISERS, DELAYS &
SILENCE DETECTORS
SY
NCHR
ONISERS, DEL
A
Y
S & SILENCE DE
TEC
TORS - RB
-SD1
9
Switch
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Seconds
4
8
12 16 20 24 28 32 36 40 44 48 52 56 60 125
Force Main Mode
. In this mode only the remote mode control input has any effect. When
this control input is active (low) the output is forced to input B (the master input) regardless
of whether audio is present. The unit operates in auto mode and with input B as the master
input. All other functions operate as with normal mode.
Emergency Program Override Mode.
In this mode all alarm LEDs are illuminated
whenever the main input is active. This is to indicate that the emergency paging program
is active on the main input. When the paging program goes silent, the unit will revert back
to the aux. input and all the alarm LEDs will switch off. The front panel source button is
disabled. All other functions operate as normal.
Detection Enable/Disable Mode.
In this mode the silence detection can be disabled and
enabled remotely. The front panel and remote source select controls are used to enable or
disable the Silence Detection feature.
Front panel Source indicator on
=
Silence Detection enabled
Front panel Source indicator off
=
Silence Detection disabled
The front panel source select button toggles this state, while the remote Source control
(Pin 14 on the remote connector) can only ENABLE Silence Detection. Pin 10 on the
remote connector is used to DISABLE Silence Detection. When the unit powers up Silence
Detection is always enabled. The remote source select indicator (Pin 13 on the remote
connector) is enabled when Silence Detection is disabled. In this mode input A is always
the Main input and input B is always the Aux input. Since the front panel and remote source
selection controls are disabled, source selection is not allowed in this mode. The Aux alarms
are masked for both front panel indicators and remote alarm relay, for as long as the main
input is present.
Return Time Set Mode.
In this mode, the unit operates as normal, except that during
power up the return time delay can be programmed. The return time delay is the amount
of time, during an alarm condition, that the unit takes to switch from the Aux to Main input
once audio is presented to the Main input. To set the return time, immediately after the unit
is switched on, press and hold the MODE switch. While the MODE switch is pressed set the
TIME rotary switch to required setting (see below). When finished, release the MODE switch,
and the unit will start operating within a few seconds. Remember to return the TIME rotary
switch to the required setting.
Rotary Setting
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Seconds
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28 120
To Set the Additional Modes:
Apply power to the unit, and while the front panel ALARM LED is flashing, press and hold
the RESTORE button. The MAIN and AUX PROG and ALARM LEDs will flash alternately - these
are used to indicate the selected mode. The SOURCE LED will also alternate to show the
mode bank that is currently selected.