User guide

Configuration Dipswitches:
There are two opto-isolated inputs on each MiniRepeater which can be
used for starting, stopping, and resetting them. All configuration for the DR-
50Õs is done on an eight position Configuration Dipswitch (nine positions on
the AB-50). These are used as follows:
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WITCH #1: RESET FROM ÔAÕ:
When this switch is turned on, the repeater will reset to the begin-
ning of the first spiel every time the ÔAÕ input is activated. This is an
edge triggered input activated on the closing edge of the input.
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WITCH #2: RESET FROM ÔBÕ:
When this switch is turned on, the repeater will reset to the begin-
ning of the first spiel every time the ÔBÕ input is activated. This is edge
triggered input activated on the closing edge of the input. Closing
Switch #8 removes the one-shot circuit from this input for applica-
tions where the reset signal must be held.
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WITCH #3: STOP FROM ÔAÕ:
When this switch is turned on, the repeater will stop when the A
input is released. This allows you to set up a card to start running
when the A input is activated and stop as soon as this input is re-
leased. This can be used in conjunction with Switch #1 if you would
like the repeater to always restart at the beginning of the first spiel.
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WITCH #4: STOP FROM ÔBÕ:
When this switch is turned on, the repeater will stop when the B
input is activated. When used in conjunction with Switch #8 it will ef-
fectively lock out any starts from the card as long as the B input is
held active.
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WITCH #5: ENABLE STOP:
When this switch is turned on, the repeater will pay attention to
the ÔstopÕ commands encoded into the Eprom. When off it will re-
peatedly play whatever is recorded on the Eprom until it is explicitly
told to stop. You can use this switch to make a repeater start running
from a pulse on the A input until you tell it to stop with a pulse on the
B input.
To loop a sound on a AB/DR-50 with a delay between each itera-
tion of the loop you will need to record tow spiels on the repeater.
The first is the actual spiel you want to play. The second is a ÔsilentÕ
spiel that is the length of the delay between each loop iteration. This
ÔsilentÕ threshold is usually recorded at a 2 KHz sample rate with a 0
KHz filter rate. With this switch ON, the repeater will play both spiels
as one.
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WITCH #6: MUTE ENABLE:
When this switch is turned on, the repeater will activate the mute
input on the filter chip whenever the repeater is stopped. This re-
duces the quiescent noise level from the card and so is almost al-
ways left ÔonÕ.
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WITCH #7: ÔAÕ INPUT CONTINUOUS:
When this switch is turned on, the A input is held continuously acti-
vated. Turning this switch on is the easiest way to make a card start
looping as soon as power is applied. With this switch on the only way
to stop the repeater is to turn on switches #2 and #8, and use the B
input to stop (actually reset) the repeater.
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WITCH #8: ÔBÕ INPUT CONTINUOUS:
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