Philips PM 5508 Operating Manual page 9

8
Encoding
System
PM 55088: PAL-I
PM 5508E: PAL-G
Subcarrier
4.433619 MHz
Frequency drift of
Subcarrier
± 20 Hz (10° . . . 40° C)
Burst width
approx. 10 cycles of subcarrier
Burst amplitude
"NOM" position: equal to sync. signal.
Burst phase
Adjustable: from approx. 0% to 200%.
line sequential: 180° ± 45°
Burst position
5.6 fps after leading edge of line sync. pulses
Chroma modulators
balanced diode type
Chroma bandwidth
1.1 MHz (3dB)
Group delay precorrec-
tion of Chroma signal
— 175 ns
Colour matrixing
Y = 0.30 R + 0.59 G + 0.11 B
Patterns
"CHECKERBOARD"
6 x 8 black/white squares, accurately centred.
"WHITE"
100% white signal with PAL-alternating burst.
"RED"
fully saturated red signal with PAL-alternating
burst.
"GREYSCALE"
staircase signal with 8 identical steps.
"DOTS" white dots; location corresponds to the
intersections in the Irosshatch pattern.
"CROSSHATCH" 11 horizonta! white lines;
width: on line per field
15 vertical white lines;
width: 200 ns.
The horizontal and vertical white lines form
black squares, accurately centred.
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