MIL-PRF-1/1048D
TABLE I. Testing and inspection - Continued.
1/
Accelerator average power input shall be limited to 6 watts. Grid No. 4 and grid No. 2 are connected internally and referred to
herein as accelerator. This shield and the accelerator electrodes should be connected together under normal operating and
test conditions. However, the accelerator as well as the first ring of the post-deflection accelerating system may be operated
at slightly different potentials for astigmatism control if desired and the shield potential should then be adjusted for optimum
performance.
Deflection electrode circuit resistances should be equal. Higher resistance values up to 5.0 MegΩ may be used for low-beam
2/
current operation.
3/
This tube is designed for optimum performance when operating at an Eb3/Eb2 ratio of 2.0. Operation at other ratios of
Eb3/Eb2 may result in changes in deflection uniformity, pattern distortion, and tracking.
4/
All tests except capacitance, vibration, tracking, cathode illumination, stray emission, and interaction factor shall be made on
each unit separately. Each deflection plate shall be connected to A2 through a resistance of 1 MegΩ.
5/
This test to be performed at the conclusion of the holding period.
6/
Maximum potentials applied to base, deflection plates, and A2 only.
7/
Corresponding traces of each unit shall be within 1° of each other.
8/ The ratio of the deflection factors of corresponding deflection electrodes shall not exceed 1.15.
9/
The focused spots of both guns shall be moved by means of a common dc voltage along the 1D2 axis until the spot of gun A
is at ±1 inch from the geometrical center of the tracking area. Then by means of a small correction voltage, the spot of gun B
shall be moved to the same distance. The spots then shall be moved by means of the common dc voltage in the opposite
direction from the geometrical center until the spot of the less sensitive gun reaches -1 inch. The difference in deflection
factor of the more sensitive gun is then compensated for by moving its spot back to -1 inch by means of a voltage divider.
This entire procedure is to be duplicated along the 3D4 axis. Then by means of the two common dc voltages, the spots shall
be tracked over the entire tracking area, a 4-inch diameter circle centered with respect to the tube face center, and the
greatest distance between the spots shall not exceed the limit specified.
10/
Centered with respect to the tube face and with the tube shielded.
11/
With a raster pattern, adjusted so its widest points just touch the sides of a 3.060-inch square, will fall within the area bounded
by the 3.060-inch square and an inscribed 2.940-inch square.
12/
All other electrodes contained within the envelope are to be tied together.
5
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