HPS-141
12
2.3
Frame geometric
2.3.1
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 60dB
µ
V 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 750
µ
A (
Iabl=750
µ
A
).
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
Summary of Contents for HPS-141
Page 48: ......
