Tektronix 545A Instruction Manual page 8

Characteristics
—
Type
545A
Construction
Aluminum-alloy
chassis
and
three-piece cabinet. Photo
etched anodized
panel, blue
wrinkle-finished cabinet.
Dimensions
—
see Figure
1-2.
Weight
—
65 pounds.
Accessories
1
—
3
to
2-wire Adapter, 103-013
2
—
Type
6000 Probes,
010-020
2
—
Type A510
Binding-Post Adapters, 013-004
1—
Test
Lead
(012-031).
1
—
Type
F510-5
Green
Filter
(378-514).
2
—
Operator's Manuals.
1
—
Operator's
Handbook.
1
—
3-conductor
power
cord, 161-010
Fig.
1-2.
Type 545A
Oscilloscope Dimensions.
Type
N
The Type
N
Sampling
Unit
is
designed
for use with Tek-
tronix plug-in
type
Oscilloscopes.
The
sampling system
thus
formed
permits the display
of
repetitive signals with
fractional
nanosecond
(1
0
_0
second
or
nsec)
risetime.
By
taking successive
samples
at a
slightly later
time
at
each
recurrence
of the pulse under
observation, the
Type
N
reconstructs the pulse on a
relatively
long time-base.
Speci-
fications of the
Type
N
include a
risetime of 0.6 nsec, cor-
responding
to
a
maximum
bandpass
of
approximately
600
me; a
sensitivity
of 10
mv/cm
with 2
mv
or
less
noise;
and
a dynamic range
of
±120
mv
minimum
linear
range
before overloading
results.
Accidental overload
of
±4
volts dc
is
permissible.
Type
P
The
Type
P
Plug-In Unit generates a
fast-rise step-
function
test
signal of
known
waveform,
simulating the
out-
put of
an
ideally
compensated Type K
Unit driven with
a
Tektronix
Type
107 Square-Wave
Generator. The Type
P
permits the
standardization
of the main-unit
vertical
amplifier
transient
response
of a
Tektronix convertible
oscilloscope. Risetime
of the
Type
P
is
approximately
4
nanoseconds when
it is
used
to
standardize a Type
540-
Series Oscilloscope.
Pulse repetition rate
is
240
step func-
tions
per second, with
either positive or
negative
polarity.
Step
function amplitude
is
continuously adjustable between
0
and
3
major
graticule
divisions.
Type
Q
The Type
Q
Plug-In Unit permits
any
Tektronix convertible
oscilloscope such
as the
Type 545A
to
be operated
with
strain
gages
and
other
transducers. Excitation voltages
for the
strain
gages and
transducers are provided
by
the
plug-in
unit.
The
unit provides high gain, low
noise,
and
extremely
low
drift.
Frequency response
of the Type
Q
Plug-In Unit
is
DC
to
6
kc;
risetime
is
approximately 60
microseconds.
Strain sensitivity
is
calibrated
in
10 steps
from
10 microstrain
per
major
graticule division
to 10,000
microstrain per
division,
and
is
continuously variable
be-
tween
steps.
Type
R
The Type
R Plug-In Unit
is
a
combined power
supply
and
pulse generator which
is
used
to
measure
the
high-frequency
characteristics of
junction
transistors
by
the pulse-response
method.
When
the
Type
R
is
used
in
an
oscilloscope having
a
delay
line;
delay
time,
risetime,
storage
time,
and
fall-
time
may
be
displayed
simultaneously.
A
pushbutton
switch
connects a
front-panel terminal
directly to the input
of the
oscilloscope
for observing externally derived
waveforms.
Pulse
risetime of the
Type
R unit
is
less
than 5 nano-
seconds,
so
measurements depend
on
the risetime of the
oscilloscope
used. Pulse amplitudes are
in
8 fixed,
cali-
brated
steps
from
.05 to 10
volts, adjustable
between
steps.
Pulse recurrence frequency
is
120 pulses per second.
Type
S
The Type
S
Plug-In Unit
is
designed
for use with Tek-
tronix
Wide-Band
convertible
oscilloscopes. The slower
risetime of the Tektronix 530-Series
Oscilloscopes
will affect
the
ability of the S Unit
to
analyze
fast
semiconductor
diodes. Using
the
Type
S,
voltage
across a
test
diode
is
displayed
as a function of
time.
Certain diode
parameters, such
as junction
resistance,
junction capacitance,
and
the stored charge
at the junction,
can be measured
readily
and
reliably
from
the display.
Performance
of a diode
in
a particular
circuit
can be
pre-
dicted
by analyzing
the recovery
and
"turn-on" character-
istics.
Since
it
is
essentially
a
means
for plotting
voltage
across an element while
passing constant current
through
it,
the unit
can be used
for
other applications as
well.
For
®I
1-3