EasyManua.ls Logo

Tektronix 585 - Page 12

Tektronix 585
151 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
Operating
Instructions
—
Type
585
Input
Signal
Connections
Input
signals
to
the
oscilloscope
are
carried
to
the
input
connector
of
the
Type
80
Plug-In
Unit
through
the
P80
high-frequency
probe.
The
Type
585,
Type
80
Plug-In
Unit
and
P80
Probe
make
up
a
basic
DC
to
95
megacycle
system.
The
gain
of
this
combination
is
calibrated
with
a
vertical
deflection
of
0.1
volts
per
centimeter
at
the
input
to
the
probe.
NOTE
A
second
basic
wide-band
system
includes
the
Type
82
Dual-Trace
Plug-In
Unit
with
a
sensitivity
of
0.1
volts
per
centimeter.
Special
probes
are
provided
with
the
Type
82,
permitting
easy
con
nection
into
any
circuit.
A
higher
gain
of
0.01
volts
per
centimeter
is
available
with
slightly
reduced
bandpass.
The
rest
of
this
manual
was
written
for
use
of
the
Type
80
Plug-In
and
P80
Probe.
Most
of
the
conditions
apply
to
the
Type
82,
except
the
input
resistance
and
capacitance.
See
the
Type
82
Manual
for
additional
details.
A
third
system
using
the
Type
81
Plug-In
Adapter
makes
possible
the
use
of
all
Tektronix
Letter-Series
plug-in
units.
When
using
a
Type
81
Plug-In
Adapter
Unit
with
a
Type
K
or
Type
L
Plug-In
Unit,
the
system
bandpass
is
de
to
3
db
down
at
30
M
c
.
When
using
the
Type
80
Plug-In
Unit
with
the
P80
Probe
in
cases
where
the
amplitude
of
the
input
signal
is
suffi
cient
to
deflect
the
spot
off
the
screen,
the
vertical
size
of
the
displayed
waveform
can
be
reduced
to
a
usable
level
by
using
one
of
the
5
fixed
attenuators
supplied
with
the
P80
Probe.
The
attenuators
connect
directly
to
the
front
of
the
probe
and
provide
attenuation
factors
of
2,
5,
10,
20,
and
50
and
vertical
deflection
factors
of
from
0.1
volt
per
centimeter
without
an
attenuator,
to
5
volts
per
centi
meter.
The
fixed
attenuators
supplied
with
the
P80
Probe
can
be
used
only
one
at
a
time.
In
cases
where
additional
attenua
tion
is
required,
a
standardized
attenuator
is
available
that
permits
the
stacking
of
any
one
regular
attenuator
on
a
standardized
attenuator.
The
standardized
attenuator
pro
vides
attenuation
of
10
when
used
alone.
If
the
XI
0
Stand
ardized
Attenuator
is
used
with
a
regular
2-1
attenuator,
the
total
attenuation
will
then
be
20.
See
the
Accessories
section
of
this
manual
for
part
numbers
and
ordering
in
formation.
Accuracy
of
the
deflection
factors
of
any
of
the
attenu
ators
or
attenuator
combinations
can
be
checked
by
connec-
ing
the
attenuator
tip
to
the
CAL.
OUT
connector
and
com
paring
the
resulting
deflection
against
the
Amplitude
Cali
brator
voltage.
The
calibrated
vertical
deflection
factors
and
the
graticule
markings
permit
accurate
voltage
measurements
to
be
made
directly
from
the
oscilloscope
crt.
The
procedures
for
making
voltage
measurements
are
described
in
the
Applications
sec
tion
of
this
manual.
When
connecting
the
oscilloscope
to
the
signal
source,
consider
the
loading
effect
produced
by
the
probe
on
the
signal
source.
At
low
frequencies
the
input
impedance
of
the
P80
probe
is
100
kilohms
which
in
most
cases
limits
the
loading
effect
to
a
negligible
amount.
However,
as
the
frequency
of
the
input
signal
is
increased
and
approaches
the
upper
limit
of
the
oscilloscope
passband,
the
input
im
pedance
of
the
probe
drops
to
about
150
ohms.
The
load
ing
effect
of
the
probe
under
these
conditions
can
be
con
siderable,
particularly
when
the
input
signal
is
connected
from
a
high
impedance
source.
Loading
may
be
sufficient
to
adversely
affect
operation
of
the
signal
source.
Loading
of
the
signal
source
can
be
reduced
through
use
of
an
attenuator
head
on
the
P80
Probe.
However,
this
also
has
the
effect
of
reducing
the
vertical
amplitude
of
the
displayed
waveform.
Consequently,
the
use
of
an
attenu
ator
head
must
be
a
compromise
between
reducing
the
loading
effect
and
reducing
the
signal
amplitude.
In
no
way
can
the
loading
effect
be
completely
eliminated.
You
must
consider
this
effect
when
evaluating
information
ob
tained
from
the
oscilloscope.
When
observing
signals
from
low
impedance
sources,
loading
will
usually
be
negligible.
To
prevent
reflection
of
high
frequency
waveforms
and
resulting
waveform
distortion,
all
cables
and
high
frequency
signal
sources
should
be
terminated
in
their
characteristic
Type
P80
Probe
Fig.
2-4.
Accessories
required
to
connect
a
50
O
system
to
the
Type
80
Probe.
The
Attenuator
is
optional.
2-4
50-ohm
Cable
with
GR
Connector,
017-501
50-ohm
10:1
Atten.,
010-314
50-ohm
Termination,
013-033
BNC
to
UHF
Adapter,
103-032
GR
to
BNC
Adapter,
017-024

Related product manuals