Gilderfluke&Co Mp3-50 Audio & Show Controllers - Manual (Page 31)

a) In a church bell tower, where a simple switch opening can
be used to temporarily disable bells from ringing during a
service.
b) In a Theme Park, where this input can be tied to the existing
power management grid to disable tolling when the park is
closed.
c) If you have a show or sound which should not be interrupt-
ed by a scheduled event, or if schedule scans are causing
glitches in your show playback. You can set the show/sound
so that it ‘can not’ be stepped on, but if you have a particu-
larly long schedule that must be scanned, it may cause a
hesitation in the show which is running. By using a show
control output wired into this input, you can control when
schedule scans can and can not take place during differ-
ent parts of the show.
If used with the ‘Atomic’ Clock option, the ‘D’/White input is
what is used to resynchronize the RTC with the external ‘Atomic’
Clock. The time which has been entered in the Mp3 Configura-
tor must agree with the time set for the alarm on the ‘Atomic’
Clock module. In most cases, the reset time is set about a sec-
ond earlier than the ‘alarm’ time, to offset for the slight delays in
starting a Mp3 playback.
We are using 3:05:01 as the default resynchronization time.
The external ‘Atomic’ Clock MUST be set so that the alarm goes
off at 03:05:00. The extra second we are offsetting by is to allow
for the 1 second lag before a Mp3 SoundFile starts playing after it
is triggered. It is at 3:05 AM so that when daylight savings starts
and ends, there will be no more than one hour before the Mp3-
50/8 or Mp3-50/40 is resynchronized to the appropriate time. Any
earlier, and the daylight savings transition might be missed until
the next resynchronization time.
A single two conductor cable connects the ‘Atomic’ Clock
module to the Mp3-50/8 or Mp3-50/40. This wire lands on the
‘D’/White input to the Mp3-50/8 or Mp3-50/40 (the striped lead is
the positive, bottom most terminal). The input to the Mp3-50/8 or
Mp3-50/40 is optically isolated. If needed, you can stretch these
wires for hundreds of feet, if needed.
The link between the ‘Atomic’ Clock module and the Mp3-
50/8 or Mp3-50/40 can be tested by pressing the ‘snooze’ button
atop the ‘Atomic’ Clock. This will light the back light on the LCD
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