For Video Equipment
MN6761S
Timing Chart
1. Horizontal synchronization block
This block compares the phases of the HSYNC signal derived by separating off the horizontal component of
the GLSYNC input and the WHD signal from the synchronizing signal generator after it has passed through
the monostable multivibrator. It is thus possible to adjust the horizontal phase by adjusting the CR integral
circuit's time constant.
GLSYNC
HSYNC
WHD
DELAY
WHD
Timing chart for horizontal pulse phase comparison
2. Vertical synchronization block
This block detects the V-SERATION interval in the GLSYNC input and generates a vertical reset (VR) pulse
with 0.5 H of the start of that interval. It then issues no pulses for 256 H (NTSC) or 304 H (PAL) after this
VR pulse.
GLSYNC
VR
(
)
2.2µs NTSC
(
)
1.8µs PAL
(
)
14.0µs NTSC
(
)
11.2µs PAL
Vertical reset pulse timing chart
PANASONIC [ PANASONIC ]
