Philips 20PT643F Service Manual page 124

NC
NICAM
NTSC
NVM
OB
OC
OSD
PAL
PCB
PIP
PLL
POR
Progressive Scan
Not Connected
Near Instantaneous Compounded Audio Multiplexing.
This is a digital sound system, mainly used in Europe.
National Television Standard Committee. Color system
mainly used in North America and Japan. Color carrier
NTSC M/N = 3.579545 MHz, NTSC 4.43 = 4.433619
MHz (this is a VCR norm, it is not transmitted off-air)
Non Volatile Memory: IC containing TV related data
e.g. alignments
Option Byte
Open Circuit
On Screen Display
Phase Alternating Line. Color system mainly used in
West Europe (color carrier = 4.433619 MHz) and South
America (color carrier PAL M = 3.575612 MHz and PAL
N = 3.582056 MHz)
Printed Circuit board
Picture In Picture
Phase Locked Loop. Used for e.g. FST tuning systems.
The customer can give directly the desired frequency
Power-On Reset
Scan mode where all scan lines are displayed in one
frame at the same time, creating a double vertical
resolution.