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; horizontal 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 465B Option 05 oscilloscope in
TV
applications. Refer
to
preceding sections
of
this manual
for
use
and operation
of
the unmodified instrument.
Installation
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.
NOTE
The
extended tab at the bottom
of
the graticule
mates with the slightly wider (bottom) margin
of
the
graticule cover.
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/DIV
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
VOL
TS/DIV
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
VOL
TS/DIV
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.
100
465B/DM44
Operators
REV A AUG 1979
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