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Fig.
9
PS-PN
MODULE
The
PS-PN
module
supplies
DC
power
to
various
other
modules
in
the
Av-1010.
The
PS-PN
is
supplied
with
+24VDC
on
pin
9.
It,
in
turn,
supplies
-15V
from
pin
10
to
the
threshold
module.
This
-PN
module
also
provides
the
high
voltage
power
to
the
two
pulse
generator
modules.
Pin
7
supplies
+10V
to
the
AMP
FINE
potentiometer
(PT5).
This
control
and
the
resistors
R30
to
R38
on
SW8
divide
this
voltage
down
to
somewhere
between
0
and
10V,
which
is
then
supplied
to
either
pin
1
or
2,
depending
on
the
position
of
the
polarity
switch
(SW9).
If
SW9
is
in
the
POS
position,
the
voltage
is
applied
to
pin
1
and
+24V
is
supplied
to
pin
3.
The
PS-
PN
module
amplifies
the
voltage
on
pin
3
by
a
factor
of
+11
using
high
voltage
operational
amplifiers
and
supplies
this
high
voltage
to
pin
5
which
then
connects
to
pin
4
of
the
positive
pulse
generator
module.
Similarly,
if
SW9
is
in
the
NEG
position,
the
AMP
FINE
pot
varies
the
voltage
on
pin
2
between
0
and
+10V
and
+24VDC
is
supplied
to
pin
4,
which
activates
the
amplifier
that
supplies
0
to
-110V
to
pin
6.
Pin
6
connects
to
pin
4
of
the
negative
pulse
generator.
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