Doepfer A-152 Voltage Addressed Track&Hold / Switch (Multiplexer) / Digital Outputs - Manual (Page 6)

Voltage Addressed T&H/Switch A-152
System A - 100 doepfer
6
Normalling options
The common terminals of the multiplexer and the T&H
section can be normalled in different ways, i.e. they can
be pre-connected provided that no plugs are inserted
into the corresponding sockets. For that purpose two
single row pin headers with jumpers are available:
JP8: located on the pc board of the multiplexer unit
(labelled "BOARD C SWITCHES") at the lower edge
JP7: located on the pc board of the T&H unit (labelled
"BOARD B T&H") at the lower edge as well
There are two possibilities to set the jumpers of JP7 and
JP8:
• JP8 below, JP7 towards the common T&H socket
In this case the common socket of the multiplexer unit
!
b is connected to the common input of the T&H unit "b
provided that no plug is inserted into the common socket
!
b of the multiplexer unit. For both units T&H and
multiplexer the same input signal is used (applied to the
common input of the T&H unit "b). The eight single
sockets of the multiplexer unit !a function as outputs in
this case.
• JP8 top, JP7 away from the common T&H
(factory setting )
In this case the common input of the T&H unit "b is
connected to the common socket of the multiplexer unit
!
b provided that no plug is inserted into the common
input of the T&H unit "b. This leads to two possibilities:
1. For both units T&H and multiplexer the same input
signal is used. The signal is applied to the common
socket of the multiplexer unit !b. In this case the eight
single sockets of the multiplexer unit !a function as
outputs.
2. No plug is inserted into the common socket of the
multiplexer unit !b. In this case the single sockets of the
multiplexer unit !a are used as inputs for the T&H with a
separate input for each T&H output. Each single socket
of the multiplexer !a works as input for the neighbouring
T&H stage "a. In this case the eight single sockets of
the multiplexer unit !a function as inputs.
If one or both jumpers are removed no normalling is
active. We recommend to keep the jumpers for a later
re-installation of the normalling option.