)
)
)
Service Administrative Support
,
TV
LINEARITY
GRATICULES
(CONT.)
one
is
faced with a variety of
linearity
graticules, color display
monitor types,
and
signal generators
to
make
a choice
from.
Besides
having
three sizes of
CRT's,
there are four
major
television standards,
non-television display applications,
and
more
than
18
signal generators
from
Tektronix alone.
This
list
is
further
expanded
when
one
considers
custom
modified products or
specification/standards changes.
This
article
will
mainly
touch
upon
standard applications,
however,
some
custom
units will
be
discussed
where
appropriate.
The
following
list
describes the
linearity
graticules currently
available for Tektronix
Color
Monitors.
In
general, these are
plastic
overlays that are designed to
be
placed in front of the
CRT.
A
small
high-intensity
lamp
1s
then
placed
at
a prescribed distance
from
the face of the
CRT,
thereby
projecting the
shadows
of the various
graticule
markings
on
to the
CRT
face.
Graticule
P/N
Instrument
TV
Stand.
331-0305-00
650
Series
NTSC,
SECAM,
PAL-M*
331-0359-00
650
Series
PAL
331-0305-01
670
Series
NTSC,
·PAL-M*
331-0359-01
670
Series
PAL
067-1054-00
690SR
NTSC*
067-1055-00
690SR
PAL
067-1034-00
690SR
Opt
40/48
Hi
Res***
067-1034-00
6942
Hi
Res***
/
3~1-0305-02-trtr
650,670,
NTSC,
1
690SR
PAL-M
331-0359-02**
650,670,
690SR
PAL
October,
1883
lae&1e
31
*
Some
TSG12
and
TSPll
generators
were
compatible
with
NTSC
Graticules
due
to
the
number
of horizontal
and
vertical lines used.
**
331-0305-02
and
331-0359-02
are
35rml
slides that are
meant
to
be
projected
upon
the
CRT
face with a slide projector
having
a lens of the proper
focal length.
By
carefully
positioning the projector,
these slides
can
be
used
with
any
display that
has
the
proper aspect
ratio
(3
to 4).
***
The
067-1034-00
graticule for
the
690SR
and
6942
is for
non-TV
displays using a
31
KHz
scan
rate
and
a special
generator.
-11-
In
general, those graticules that
are
used
for television
applications
have
patterns
designed for crosshatch
convergence
patterns of
two
types.
NTSC,
SECAM
and
PAL-Muse
a
14
x
17
line configuration, while
PAL
uses a
15
x
20
line configuration.
High
resolution graticules
such
as
the
067-1034-00
use
an
11
x
15
line configuration.
The
following
table
lists
convergence
generators
produced
by
Tektronix
and
provides
a
handy
ref~rence describing the
convergence line pattern that the
various instruments produce.
14 X
17
15
X
20
11
X
15
140
141A
Mod
431L
067-1039-00
142
141A
Mod
7032
143
141A
Mod
431S
144
141A
Mod
432D
145-M
145
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