2.3.6 Pin-Cushion & Shape of Raster
a) Connect the receiver to a 117V
AC
line.
Turn on the TV and adjust bright and contrast control to max. position, saturation and
volume to min. Position. Wait for the heat period (please see the specification for this
model).
b) Apply to the antenna input a 60dBµV level signal with 88% modulated “CROSSHATCH”
pattern (Frequency and channel factory defined)l
c) Turn the face tube to West/Lest orientation
d) Adjust bright and contrast control to “PP” position
e) For the next reads, please take references by figure F ( distances in millimeters)
f) Observe the screen pattern, to calculate:
Top-Bottom = 2(c1 + c2)/(AD + BC) X 100
Left-Right = 2(d1 + d2)/(AB +CD) X 100
(*) Check for signals PAL-M and PAL-N
Minimum Nominal Maximum Unit
TOP-BOTTOM - - 1,50 %
LEFT-RIGHT - - 2,00 %
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