50
While in PAL format, the unit will be mV, While in NTSC format, it will be IRE.
Video signal PEAK to PEAK level:
For NTSC format, the video signal level is 140±15IRE
For PAL format, the video signal level is 1000±200mV
If the level is too low, it will cause the image to lose quality and limit the distance it will travel over
cable. If the level is too high, it will distort the image.
SYNC level:
Tests the amplitude of the video sync pulse to verify if the video level is correct.
For NTSC format, the SYNC level is 40 ± 5IRE
For PAL format, the SYNC level is 300 ± 35mV
If the level is too low, it will cause the image to not frame out properly. If the level is too high, it will
lead to a poor quality image.
COLOR BURST level:
Testing the color burst level will determine if the burst signal is sufficient to
trigger the displays color producing circuit. Burst will diminish in amplitude over longer cable runs and
can get fall below the threshold for the video display to show a color image.
NTSC
Video signal level
140±15IRE
Chroma level( COLOR BURST)
40±5IRE
SYNC signal level
40±5IRE
PAL
Video signal level
1000±200mV
Chroma level( COLOR BURST)
300±35mV
SYNC signal level
300±35mV
