GE 4PE350A3 Instructions Manual page 283

TUBE TYPES X01020L,X01020R,X01020G,X01020B
7. Direct camera to the scene to be televised and uncap lens.
8. Turn grid No. 1 bias -control slowly until a picture is produced on the monitor. If the picture is too
faint, increase lens aperture.
9. Adjust grid No. 3 and grid No. 4 voltage control (beam focus) and optical focus alternately for max.
focus.
10. Align the beam of the plumbicon by either of the two following methods:
a)
Adjust the alignment fields in such a way that the center of the picture on the monitor does
not move when arid No. 3 and No. 4 voltage (beam -focus) is varied.
b)
Reduce signal -electrode potential to a few tenths of a volt. Adjust alignment fields until most
uniform picture is obtained,as observed on monitor or waveform oscilloscope.
11. Adjust scanning amplitudes:
a)
By means of a mask of 0.5 x 0.67 in. which is in contact with and centered at the face -plate, de-
crease horizontal and vertical deflecting currents until the periphery of this mask is just outside the
raster on the monitor. This procedure is facilitated by small adjustments of the'centering controls.
b)
If no mask available, direct the camera to a test chart having correct aspect ratio of 3 : 4 and adjust
the centering controls in such a way that the target ring is just visible in the corners of the picture.
Adjust distance from camera to test chart and optical focus alternately until the picture of the test
chart is positioned on the face -plate. Decrease both scanning amplitudes until the picture of the
test chart completely fills the scanned raster on the monitor.
12. Adjust iris for a picture of sufficient contrast and adjust the beam -current to a value that all highlights
will be stabilized.
13. Check alignment, beam focus and optical focus.
ALWAYS:
use full size (0.5 x 0.67 in.) scanning of the target and avoid underscanning
use sufficient beam current to stabilize the picture highlights
make sure that the deflection circuits are operative before adjusting beam current
avoid focusing camera directly to the sun
keep lens capped when transporting camera
Transportation, Handling and Storage
During transportation handling or storage the longitudinal axis must either be in a horizontal position or be kept
vertically with the faceplate of the tube up.
The ambient temperature should not exceed 30° C (86° F) during long term storage.
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