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HP 120A - Page 13

HP 120A
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Sect.
IA
Page
4
TABLE
1A-1.
SWEEP
TIME
ACCURACY
SWEEP
TIME/CM
Switch
Position
Timing
Signal
Frequency
-
Period
Cycles
produced
in
9.
5
to
10.
5cm
*
200
MILLISECONDS/CM
1
cycle
1
second
2
100
MILLISECONDS/CM
10
cycles
100
milliseconds
10
50
MILLISECONDS/CM
10
cycles
100
milliseconds
5
20
MILLISECONDS/CM
10
cycles
100
milliseconds
2
10
MILLISECONDS/CM
100
cycles
10
milliseconds
10
5
MILLISECONDS/CM
100
cycles
10
milliseconds
5
2
MILLISECONDS/CM
100
cycles
10
milliseconds
2
1
MILLISECONDS/CM
1,000
cycles
1
millisecond
10
.5
MILLISECONDS/CM
1,000
cycles
1
millisecond
5
200
MICROSECONDS/CM
1,000
cycles
1
millisecond
2
100
MICROSECONDS/CM
10
kilocycles
100
microseconds
10
50
MICROSECONDS/CM
10
kilocycles
100
microseconds
5
20
MICROSECONDS/CM
10
kilocycles
100
microseconds
2
10
MICROSECONDS/CM
100
kilocycles
10
microseconds
10
5
MICROSECONDS/CM
100
kilocycles
10
microseconds
5
*
Use
de
input
coupling
to
avoid
degrading
input
signal.
2)
Set
SWEEP
TIME
VERNIER
to
CAL,
SYNC
selec
tor
to
INT+,
SWEEP
EXPAND
switch
to
XI,
Set
SWEEP
TIME
switch
to
1
MILLISECOND/CM.
3)
Set
’
’
time
interval
generator
”
for
1000
cps
or
a
1
millisecond
period.
Adjust
other
oscilloscope
con
trols
to
display
the
signal
with
a
vertically
centered
peak-to-peak
deflection
from
2
to
6
cm.
(For
stable
triggering
from
pulses
the
use
of
the
TRIGGER
LE
VEL
control
may
be
necessary).
This
signal
should
produce
10
events
in
10
±0.
5
cm
of
the
horizontal
de
flection.
If
not
see
appropriate
parts
of
section
4-12.
4)
Check
each
step
of
the
SWEEP
TIME
switch
using
the
method
of
step
3
and
using
the
frequencies
given
in
table
1A-1.
c.
X5
Expanded
Calibration
1)
Repeat
step
3
of
paragraph
b
above
with
SWEEP
EXPAND
switch
in
X5
position.
The
signal
as
pre
scribed
by
step
b,
3
should
produce
two
events
with
in
a
horizontal
deflection
in
9.
0
to
11.0
cm.
2)
Repeat
step
4
above
but
using
table
1A-2.
TABLE
1A-2.
X5
MAGNIFICATION
ACCURACY
SWEEP
TIME/CM
Switch
Position
Timing
Signal
Frequency
-
Period
Cycles
produced
in
9.
0
to
10.
0cm
50
MILLISECONDS/CM
100
cycles
10
milliseconds
10
1
MILLISECOND/CM
1000
cycles
1
millisecond
2
5
MICROSECONDS/CM
100
kilocycles
10
microseconds
1
If
the
instrument
fails
to
meet
the
specifications
in
this
table
see
appropriate
parts
of
section
4-12.

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