3.3 Frame geometric
3.3.1 Wide and height of the frame
Preparation:
a) Connect the receiver under test to a 117V
AC
line.
b) TV setup in PP condition.
c) Apply to the antenna input a 60dBµV signal – 88% modulated with the
CROSSHATCH pattern (the preferred channel will be defined by the fabric
unit).
d) Adjust the contrast control so that average Iabl is the same to 750µA
(Iabl=750µA).
I
ABL
=(V
ABL
/R
ABL
)
e) Observe the pattern image and make a block count in the horizontal and
vertical direction.
Minimum Nominal Maximum Unit
Height (PAL-N) 10,07 10,60 11,13 Blocks
Wide (PAL-N) 13,96 14,70 15,43 Blocks
Height(PAL-M) 10,26 10,80 11,34 Blocks
Wide (PAL-M) 14,15 14,90 15,64 Blocks
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