03-05-2019, 12:00 PM
Systems either had EQ pulses or not and the television would be adjusted (height/vertical shift) accordingly.
It is only when having EQ pulses switchable on a standard that the vertical shift is noticeable, which would never have happened in reality.
Here in Ireland at the time when dual standards were in use the televisions were usually adjusted so they would over scan both horizontally and vertically. This help reduce the effects of fluctuating mains voltage. So any change in vertical position due to changing standards would not be noticed( System I having EQ pulses and System A not having them).
I can remember on frequent occasions even with over scanning the picture getting smaller than the screen. Here, back then, what would be considered a "good" picture is very different to today.
Frank
It is only when having EQ pulses switchable on a standard that the vertical shift is noticeable, which would never have happened in reality.
Here in Ireland at the time when dual standards were in use the televisions were usually adjusted so they would over scan both horizontally and vertically. This help reduce the effects of fluctuating mains voltage. So any change in vertical position due to changing standards would not be noticed( System I having EQ pulses and System A not having them).
I can remember on frequent occasions even with over scanning the picture getting smaller than the screen. Here, back then, what would be considered a "good" picture is very different to today.
Frank
