Operating instructions
3
.
The
attenuator
switch
of the
vertical
channel
in
the
hori-
zontal
signal
path
provides
many
deflection-factor
settings
to
allow
full-range
amplitude
control
.
OPERATION
WITHDUAL-TRACE
AMPLIFIERS
.
When
dual-trace
amplifier
units
are
based
with
the
Option
2
Time-
Base
unit,
any
vertical
channel
maybe
used
for
X
or
Y
signal
inputs
.
Set
the
display
mode
controls
of
both
the
amplifier
and
mainframe
to
select
the
channel
that
provides
the
vertical
signal
;
set
the
trigger
source
controls of
both
the
amplifier
and
mainframe
to
select
the
channel
that
pro-
vides
the
horizontal
signal
.
OPERATION
WITH
SINGLE-TRACE
AMPLIFIERS
.
If
single-trace
amplifier
units
are
used with
the
Option
2
Time-Base
unit,
set
the
mainframe
trigger
source
control
to
select
the
amplifier
unit
that provides
the
horizontal
signal
;
set
the
mainframe
vertical
mode
control
to
select
the
ampli-
fier
unit
that provides
the
vertical signal
.
Preliminary
Setup
APPLICATIONS
The
following
information
describes
a
procedure
or
tech-
nique
for
making
X-Y
phase
measurements
with
the
Option
2
Time-Base
unit
.
The
measurements
are
described
in
a
de-
tailed
example,
but
each
user
application
must
be adapted
to
the
requirements
of
the
individual
measurement
.
The
following
X-Y
phase
measurement
method
can be
used
to
measure
the
phase
angle
between
two
signals
of
the
same
frequency
.
1
.
Set
the
DISPLAY
MODE
push button
to
the
OUT
:
X-Y
position
.
Set
the
mainframe
intensity
control
for
conven-
ient
brightness
of
the
spot
display
.
2
.
Set
the
controls of
the
mainframe
and
the
amplifier
units
as
directed
in
the following
setup
procedure
for the
amplifier
units
to be
used
.
DUAL-TRACE
AMPLIFIERS
.
Set the
vertical
display
mode
controls
of both
the
amplifier
and
mainframe
to
select
the
input
of
the
Y
(vertical)
signal
;
set
the
trigger
source
controls of
both the
amplifier
and
mainframe
to
select
the
input
of
the
X
(horizontal)
signal
.
SINGLE-TRACE
AMPLIFIERS
.
Set
the
vertical
display
mode
control
of
the
mainframe
to
select
the
input
of
the
Y
(vertical)
signal
;
set
the
trigger
source
control
of
the
mainframe
to
select
the
input
of
the
X
(horizontal)
signal
.
Option
2-71380
3
.
Set
each
amplifier
unit
input
coupling
switch
to
dc,
and
set
the
position controls of
the
selected
X
and
Y
channels
for
a
spot
display
at
graticule
center
.
4
.
Connect
low-frequency
sine-wave
signals
of
the
same
frequency
to
the
selected
X
and
Y
inputs
.
5
.
Advance
the
mainframe
intensity
control
until
the
dis-
play
is
at
the
desired
viewing
level
.
Set the
amplifier
deflec-
tion
factors
and
variable
volts/division
controls
for
eight
divisions
of
vertical
and
horizontal
deflection,
and
set
the
position
controls to
center the
display
on
the
graticule
as
shown
in
Figure
2
.
6
.
Measure
and
record
the
overall
horizontal
deflection
(B)
and the opening of the
Lissajous
display
(A),
measuring
horizontally
at
the
graticule
horizontal
center
line (see
Figure
2)
.
7
.
Divide
A
by
B
to
obtain the
trigonometric
sine
of
the
phase
angle
difference
between
the
two
signals
.
Obtain
the
phase
angle
from
a
trigonometric
table
to
determine
the
phase
angle
between
the
X
and
Y
signals
.
Example
:
Assume
that
the
horizontal distance
measured
at
the
center
opening
of
the
display
(A)
is
2
.7
divisions
(see
B
1985-17
Figure
2
.
Measurement
of
phase
angle
difference
from
an
X-Y
display
.
Option
2-Page
3
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