ARP 1601 Service Manual - Page 3

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SECTION
1
INTRODUCTION
1.1
Product
Description
The
ARP
Sequencer,
model
1601,
is
a
16
step
se-
quential voltage generator.
A
voltage
level slider
is
provided
for
each of
the
16
steps to adjust
the
volt-
age
output
from
to
+10
volts.
The
sequencer
may
be used
in
a
"8
X
2"
mode
so that
outputs
1
through
8
(bank A) and 9 through 16 (bank
B)
sequence
in
parallel.
The
outputs
of
banks
A
and B
are
prewired
to
a
voltage
quantizer
which
effectively
"rounds
off" the sequencer's voltage
to
the nearest
whole
twelfth of
a volt.
This allows
precise
tuning
since
all
ARP
products
are
tuned
to
a
1
volt
per
octave
stand-
ard
(1/12
volt
per semitone).
A
low frequency
voltage controlled clock
governs
the
stepping speed
of
the
sequencer and can be
started,
stopped,
gated, or
speeded
up
either
manually
or
externally.
Position
gates
provide
a
constant
voltage
output
(+10
volts)
for
as
long
as
the
sequencer
is
on
a
selected
position.
The
position
gate
outputs
are
bused
to
one
of
the position gate
outputs (Gate
1,
2,
or
3).
1
.2
Specifications
SEQUENCER
Number
of
positions
16
Maximum
(unquantizedj control
voltage
output
+12
V
Maximum
Gate output
voltage
+14
V
16X1
Mode
.
.
Channels
A
and B
are
common
8X2
Mode
.
.
.
Channels
A
and B
are
separate
Step, Reset,
Start,
Stop
and
Start/Stop
jack inputs
Accepts
+3
V
to
+10
V
Gate
CLOCK
Type
Voltage Controlled
Pulse
Width
10%
to
100%
(less
5 msec.)
PWM
(Pulse
Width Modulation)
Input jack
Accepts
to
+10
volts
Frequency Range
0.2 Hz. to
100
Hz.
FM
Input
Sensitivity
2V/OCT
max.
Clock
Output
+14
V
pulse
wave
Warm Up
Drift
QUANTIZER
Function
"Rounds
off"
voltages to
nearest
1/12
V
(semitone)
Maximum
Input Voltage (A
&
B)
+10
V
Maximum
Quantized
CV
Output
(A&B)
+2
V
Range
2 octaves
POWER REQUIREMENTS
Line Voltage
100
to
130
VAC
Line
Frequency
50-60
Hz.
Power
20
Watts
FIG.
1.1
CONNECTIONS
TO SYNTHESIZER
Use
these controls to
"tune" each
position.
From
"CV
Out'
To
"Gate
in'
[IsW^ Sequencer