Option 05 Accessories; Operating Information; Installation Of Video Graticule - Tektronix 465B Instruction Manual

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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