MIL-PRF-1/588B
TABLE I. Testing and inspection -Continued.
NOTES:
1/
This test to be performed at the conclusion of the holding period.
2/
The deflection plates shall be returned to anode No. 2 through a minimum of 2.5 megohm resistors. The light output shall be
set at 2 fL. The high frequency scanning shall be applied to the deflecting plates nearest the screen and the amplitude shall be
adjusted to give a line length of approximately 90 percent of the maximum tube diameter. The low frequency scanning
amplitude shall be expanded to approximately 90 percent of the maximum tube diameter in the direction of high frequency
scanning. Readjustment shall be made for best overall focus. The tubes shall be observed for deflection defocusing,
astigmatism and spot ellipticity observable to the eye, as evidenced by fuzziness due to lack of sharpness of trace (usually
around the edges), bow-tying (irregular widths of any line when observed at different points) and bowing of trace other than
that normally caused by curvature of the bulb. This test for focus is to be made in addition to the line width measurement.
3/
The same conditions shall be set up as described in 2/ except that the connection of deflecting elements to the low and high
frequency scanning supplies shall be interchanged and the amplitudes adjusted to 90 percent of the maximum tube diameter
in both directions without any adjustment of focus from 2/ conditions. An examination for defocusing, astigmatism or spot
ellipticity shall be made as in 2/.
4
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