Tektronix 2247A

Lo
3
ey
Operators Familiarization
INTRODUCTION
This
section
Is
divided
Into
two
subsections:
BASIC
OPERATION
and
MENU
SYSTEM
OPERATION.
BASIC
OPERATION
provides
some
general
Infor-
mation
about
the
readout
displays,
graticule,
and
signal
connections;
MENU
SYSTEM
OPERATION
provides
detalled
information
on
the
menus
and
functions
available
under
menu
control,
BASIC OPERATION
This
subsection
contains
the
basic
operating
Information
and
techniques
that
should
be
considered
before
attempting
any
measurements.
For
location
and
function
of
instrument
controls,
connectors,
and
indicators
see
“Controls,
Connectors,
and
Indicators,”
Section
2
of
this
manual.
Graticule
The
graticule
Is
Internally
marked
on
the
crt
face
to
provide
parallax-free
viewing
and
enable
accurate
measurements
(see
Figure
3-1).
The
graticule
is
marked
with
eight
vertical
and
ten
horizontal
major
divisions.
Major
divisions
are
further
divided
Into
five
subdivisions
of
0.2
division
each,
marked
along
the
center
vertical
and
horizontal
graticule
lines.
Percentage
marks
for
rise-time
and
fall-time
measurements
are
marked
on
the
left
side
of
the
graticule.
Vertical
deflection
factors
and
horizontal
timing
are
cali-
brated
to
the
graticule
so
that
accurate
measurements
can
be
made
directly
from
the crt.
The
waveform
displays
are
calibrated
to
the
crt
graticule
markings
for
making
quick
and
very
accurate
measurements
of
waveform
parameters.
Voltage
measurements
are
done
by
counting
the
vertical
graticule
divisions
and
partial
divisions
occupied
by
the
portion
of
the
display
being
measured
and
then
multiplying
by
the
VOLTS/DIV
setting.
Time
measurements
using
the
graticule
markings
are
done
In
a
similar
manner.
Count
the
number
of
horizontal
graticule
divisions
and
partial
divisions
occupied
by
the
Portion
of
the
waveform
belng
measured
and
multiply
by
the
SEC/DIV
setting.
2247A
Operators
3-1