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HP 5326A - Page 13

HP 5326A
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Model
5326/27A
Installation
b.
Set
the
SAMPLE
RATE
control
cw
and
the
FAST/NORM/HOLD
switch'to
NORM
and
connect
a
1
megohm
pot
in
series
with
a
1.5k
ohm
resistor
from
+5
V
to
pin
16.
This
will
give
a
display
time
range
of
about
10
ms
to
5
sec.
If
a
shorter
time
is
desired,
set
the
FAST/NORM/HOLD
switch
to
FAST,
which
gives
a
range
of
about
50
/as
to
10
ms.
c.
Set
the
SAMPLE
RATE
control
cw
in
FAST
and
hold
the
Hold
line
(pin
16)
to
ground
for
the
desired
display
time.
The
display
will
continue
for
about
100
/as
after
the
ground
is
released.
2-53.
BLANKING
DEFEAT
2-54.
This
counter
is
designed
to
blank
insignificant
zeros
(zeros
to
left
of
data).
When
blanking
occurs,
the
digital
recorder
output
for
the
blanked
columns
is
BCD
15
(HHHH).
To
use
this
instrument
with
a
digital-analog
converter,
it
is
necessary
to
defeat
the
blanking
feature
by
repositioning
the
1
two
jumpers
on
the
A9
Display
board.
Move
the
jumpers
to
position
2,
as
shown
in
A9
Component
locator
(Section
VIII).
This
connects
pin
10
of
A9U7
and
A9U8
to
+5
V.
Also,
lift
the
pin
1
lead
of
A8U2
and
connect
pin
1
to
ground
(available
at
U2
pin
7).
2-5

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