SECTION 1
TYPE
453
I
R453
SPECIFICATIONS
Change
information,
if
any,
affecting
this section
will
be
found
at
the
rear
of
the
manual.
Introduction
The
Tektronix Type
453
Oscilloscope
is
a transistorized
portable oscilloscope designed to operate
in
a wide range
of environmental conditions.
The
light weight of the Type
453
allows
it
to be easily transported, while providing the
performance necessary for accurate high-frequency meas-
urements.
The
dual-channel DC-to-50
MHz
vertical system
provides calibrated deflection factors
from
5 millivolts to
10
volts/division. Channels l and 2 can be cascaded
using
an external cable to provide a one millivolt
minimum
deflec-
tion factor (both
VOLTS/DIV
switches set to 5
mV).
The
trigger circuits provide stable triggering over the
full
range of vertical frequency response. Separate trigger con-
trols are provided to select the desired triggering for the A
and B sweeps. One of three sweep modes can be selected
for the A sweep; automatic, normal, or single sweep.
The
horizontal sweep provides a maximum sweep rate of
0.1
microsecond/division
(10
nanoseconds/division
using
lOX
magnifier) along
with
a delayed sweep feature for accurate
relative-time measurements. Accurate
X-Y
measurements can
be made
with
Channel 2 providing the vertical deflection,
and Channel l providing the horizontal deflection.
(TRIGGER
_,,, switch set to
CH
l
ONLY,
HORIZ
DISPLAY
switch set to
EXT
HORIZ).
The
regulated
DC
power supplies maintain con-
stant output over a wide variation of
line
voltages and
fre-
quencies. Total power consumption of the instrument
is
ap-
proximately
90
watts.
Information given
in
this
instruction manual applies to the
Type
R453
also unless otherwise noted.
The
Type
R453
is
electrically identical to the Type
453
but
is
mechanically
adapted for mounting
in
a standard 19-inch rack.
Rack-
mounting instructions, a mechanical parts
list
and a dimen-
sional drawing for the Type
R453
are
provided
in
Section
6 of
this
manual.
The
following electrical characteristics apply over a cali-
bration interval of l
000
hours
at
an ambient temperature
range of
-15
° C to
+55
°
C,
except as otherwise indicated.
Warm-up
time
for given accuracy
is
20
minutes.
ELECTRICAL
VERTICAL
DEFLECTION
SYSTEM
Characteristic
Deflection Factor
Deflection Accuracy
@
Performance Requirement
5 millivolts/division to
10
volts/
division
in
l l calibrated steps (l,
2,
5 sequence) for each channel.
One millivolt/division when Chan-
nel
l and 2 are cascaded.
Within
+3%
of indicated deflec-
tion
with
VARIABLE
control set to
CAL.
Cascaded deflection factor
uncalibrated.
Characteristic
Variable
Deflection
Factor
Bandwidth
at
Upper
-3
dB
point
(with
or without
P60l0 Probe) when driv-
en
from
25
0 source.
20
mV
to
10
VOLTS/
DIV
10
mV/DIV
5
mV/DIV
Channels l
and 2
cascaded
Risetime
(with
or without
P60l
0 Probe) when driv-
en
from
25
0 source
20
mV
to
10
VOLTS/
DIV
lOmV/DIV
5
mV/DIV
Channels l
and 2
cascaded
Trace
Drift
Time
5
mV/DIV
10
mV/DIV
20
mV
through
10
V
/DIV
Temperature
5
mV/DIV
10
mV
/DIV
20
mV
through
10
V/DIV
Input
RC
Characteristics
Resistance
Capacitance
Maximum Input
Voltage
Input Coupling Modes
AC
Low-Frequency
Re-
sponse (lower
-3
dB
point)
Without probe
Performance Requirement
Uncalibrated deflection factor
at
least
2.5
times
the
VOLTS/DIV
switch indication.
This
provides a
maximum
uncalibrated deflection
factor of
25
volts/division
in
the
l 0 volts position.
DC
to
50
MHz
or greater
DC
to
45
MHz
or greater
DC
to
40
MHz
or greater
DC
to
25
MHz
or greater
Less
than 7 nanoseconds
Less
than
7.8
nanoseconds
Less
than 8.75 nanoseconds
Less
than
14
nanoseconds
Typically
less
than 0.08 div
/h
Typically
less
than
0.05
div
/h
Typically
less
than 0.03 div
/h
Typically
less
than 0.02
div/°
C
Typically
less
than 0.0125
div/°
C
Typically
lc:ss
than 0.0075 div/ ° C
l megohm
+2%
20
picofarads + picofarad
600 volts
DC
+ peak
AC
(one
kilo-
hertz or
less).
Peak to peak
AC
not
to exceed
600
volts.
AC
or
DC,
selected
by
front-panel
switch.
Typically
1.6
Hz,
Input Coupling
switch set to
AC.
1-1
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