Specifications

OPTION
05
ACCESSORIES
Graticule,
NTSC
(CCIR
System
M):
-40
to
+100
units,
with 7.5-unit
setup
line; horizontal
divisions
along
line
0.
Tektronix Part Number
337-1674-02.
Graticule, CCIR
(CCIR
System
B):
0 to
+100
units,
35-
unit
setup
line; horizont;l divisions
along
line
30.
Tek-
tronix
Part
Number
337-1674-03.
OPERATING
INFORMATION
The
following instructions and
information
pertain
primarily
to the
use of the
4658
Option 05
oscilloscope
in
TV
applications.
Refer to
preceding
sections
of this
manual
for use
and
operation
of the
unmodif
ied
instrument.
lnstallation
of
Video
Graticule
To install a
video
graticule,
loosen
(about
six
turns) the
four captive
screws
holding
the
crt bezel
in
place
and
re-
move the
bezel. Remove
the light
filter
from
the two
bosses
on
the bezel
and
install the
desired
graticule
on
these
bosses,
with the
marking
on
the outside.
The
graticule
can be moved slightly
horizontally
to align
the
external
graticule
and
mask
with the
crt
graticule
and
viewing area.
Reinstall
the bezel.
When the
video
graticule
is installed, the 10
horizontal
divisions
along
line 0
correspond
to
the
internal
graticule
divisions,
and the
TIME/DlV
calibration
of
the oscillo-
scope
is
correct.
However, the
vertical divisions
represent
only
proportions
of
the 100-unit
(CCIR)
or 140-unit
(NTSC)
video
waveform,
and the
vertical VOLTS/DlV
calibration
is inapplicable.
To
calibrate
for
a
standard
1 V
(nominal)
studio
video
signal,
apply
the 300
mV
CALIBRATOR
waveform
to
the
Vertical
input and adjust
the
VOLTS/DlV and
VAR
con'
trols
so
that the
displayed
waveform occupies
just
30
units
(CCIR
graticule)
or
42
units
(NTSC
graticule).
This
adjustment
may be
performed
with a
free'running sweep.
The
extended tab
at
mates
with
the slightly
graticule
cover.
NOTE
the
bottom of the
graticule
wider
(bottom)
margin of the
100
4658/DM44
OPerators
REV
A
AUG
1979