CCE HPS-2971 - Frame Aspect Ratio Verification; Horizontal Linearity Measurement

HPS-2971
3.3.3 FRAME ASPECT RATIO
a) Connect the receiver under test to a 117V
AC
line.
Turn on the TV and adjust bright and contrast control to max. position,
saturation and volume to min. Position. Wait for the heat period.
b) Apply to the antenna input a 60dBµV level signal with 88% modulated
PHILIPS pattern (frequency and channel factory defined).
c) Adjust bright and contrast control to nominal position.
d) For the next reads, please utilizes figure C for reference.
e) Observe the screen pattern and check the distances a, b, c, d (in
centimeters).
f) Apply the formula:
M = (a + b + c + d) / 4, and verify the proportion a/M, b/M, c/M e d/M.
Check for systems PAL-M and PAL-N
Minimum Nominal Maximum Unit
a/M 0,95 1,00 1,05
b/M 0,95 1,00 1,05
c/M 0,95 1,00 1,05
d/M 0,95 1,00 1,05
3.3.4 Horizontal Linearity
a) Connect the receiver under test in 117V
AC
line.
Turn on the TV and adjust bright and contrast control to max. position,
saturation and volume to min. Position. Wait for the heat period.
b) Apply to the antenna input a 60dBµV level signal with 88% modulated
PHILIPS pattern (frequency and channel factory defined).
c) Adjust bright and contrast control to nominal position.
d) For the next reads, please take references by figure D.
e) Observe the screen pattern and check the distances an - 15 blocks (in
centimeters).