Operating instructions
Option
2-71380
Figure
2)
and
the
overall
horizontal
distance
of
the
display
Substituting
values
:
(B)
is
eight
divisions
.
2
.7
d
ivisions
sin
(Phase
Angle)
=
=
0
.3375
8
divisions
Using
the formula
:
sin
(Phase
Angle)
=
center
opening
distance
(A)
overall
distance
(B)
Phase
Angle =
sin
-
'
0
.3375 = 19
.7°
In
most
cases,
the
typical
X
bandwidth
is
equal
to
the
hori-
zontal
bandwidth
of
the
mainframe
alone
.
(Example
:
In
the
Tektronix
7904
mainframe,
the
horizontal
bandwidth
is
1
MHz
.)
When
the
amplifier
unit
in
the
X-signal
path
is
lower
in
trigger
bandwidth
than
the
horizontal
bandwidth
of the
mainframe
(an
unusual
case),
the
X
bandwidth
is
this
lower
value
.
Option
2-Page
4
SPECIFICATION
Obtaining
the
angle
from
a
trigonometric
table
:
The
phase
angle
difference
between
the
X
and
Y
signals
is
19
.7
°
.
The
following
information
applies
to
the
Option
2
Time-Base
unit
only,
operating
in
the
X-Y
display
mode
.
Any
electrical
characteristics
listed
here
apply
when
the
instrument
is
operating
in
an
oscilloscope
system
within
an
ambient
temperature
range
of
0
°
to
+50
°
C
.
Warmup
time
of
the
oscilloscope
system
must
be
20
minutes
or
more
.
X
BANDWIDTH
Supplemental
Information
For
mainframes
with
optional
X-Y
horizontal
compensa-
tion,
the
extra delay
of
the
mainframe
trigger
path
adds
to
the
phase
shift
error
above
50
kHz
.
(Example
:
In
the
Tek-
tronix
7904
Option
2
mainframe,
the
trigger
path adds
about
2
°
of
error
at
1
MHz,
which
increases
its
X-Y
phase
shift
specification
of
2
°
,
to
a
typical
4
°
error
at
1
MHz
.)
Refer
to
the
manuals
on
associated
instruments
for
X-Y
phase
shift
and
frequency
information
.
Apply
signals
to
the
vertical
and
horizontal
systems
within the
X-Y
frequency
range
specified
for
the
instruments
.
X
DEFLECTION
FACTOR
ACCURACY
X-Y
PHASE
SHIFT
X
deflection
factor
accuracy
is
determined
by the
gain
accuracy
in
the
trigger
paths
of
the
amplifier
unit
and
the
X-Y
Phase
Shift
is
determined
by
the
circuitry
in
the
main-
mainframe
.
frame
.
For mainframes
without
X-Y
horizontal
compensa-
tion,
the
mainframe
phase
shift
specification
is
retained
for
Supplemental
Information
frequencies
of
50
kHz
and
below
.
(Example
:
In
the
Tek-
tronix
7904
mainframe,
the
X-Y
phase
shift
specification
of
The
typical
X
deflection factor
is
within
20%
of
the
ampli-
2
°
or
less
to
35
kHz
is
retained
.)
fier
unit
deflection
factor
.