DOEPFER A-154 Manuel - Page 11
Parcourez en ligne ou téléchargez le pdf Manuel pour {nom_de_la_catégorie} DOEPFER A-154. DOEPFER A-154 16 pages. Sequencer controller, system a-100
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The position of switch 7a determines if the A-154 mana-
ges 8 or 16 steps. Only in position "16" the additional
address signal A3 is generated that is required to control
the VC switch A-150.
In position "8" all functions (e.g. first/last step, CV ad-
dressing) are calculated for sequences with up to 8
steps only and the output A3 is permanently "low".
In position "16" all functions are calculated for sequen-
ces with up to 16 steps and output A3 specifies if
address 1...8 (A3 = low) or 9...16 (A3 = high) is currently
active. The address range of first/last step and CV
addressing is now 1...16.
For special effects switch 7a may be set to position "16"
even with one A-155 only. This leads - without the VC
switch A-150 - to some special qualities. If e.g. first step
= 3 and last step = 14 the A-155 will run from step 3 to
step 8 (address range 1...8; A3 = low, LED 7b off), then
from step 1 to step 6 (adress range 9...16; A3 = high,
LED 7b on) and will begin after that again with step 3.
Similar happens in case of voltage addressed mode as
the ranges 1...8 and 9...16 are repeated with one A-155
only as the switching between the two A-155 with the VC
switch A-150 is missing.
It is possible to generate sequences with up to 16 steps
too if two trigger rows resp. 2 CV rows of the A-155 are
switched with an A-150 (for details see user examples).
System A - 100
8 Man On/Off (switch) / ( ext. Master (socket)
This group of elements defines if the A-155 is controlled
by it's "old" control unit or the A-154. The reason for this
is the maximum clock frequency of the A-154 (~ 1kHz)
which is more than enough for normal sequences. But
for special applications of the A-155 (e.g. graphic VCO)
it might be necessary to operate the A-155 with frequen-
cies beyond 1kHz. In this case the "old" control unit of
the A-155 has to be re-activated as this unit is able to
work with higher frequencies.
Switching can be carried out manually with the switch 8
or by the external control input (. Manual and external
control are or-wired, i.e. as soon as the switch is in the
"On" position or a high level (> +3.5V) is applied to
socket ( control by the A-154 is active. Otherwise the
"old" control unit of the A-155 is used to run the A-155.
In case that the A-155 does not respond to changes of
the A-154 settings probably the "old" control unit of the
A-155 is active. In this case the switch 8 has to be
turned to the "On" position.
Sequencer Controller
A-154
11