Sorry, I must learn to read before posting. If it's of any use, with reference to Saab Dastards comments about resolution, my Sony KDL-15G2000 which is an old model 4:3 ratio TV, quotes these in the handbook.
Signals Pixels(H) Line(V) Frequency(H) Frequency(V)
VGA 640 480 31.5 60
SVGA 800 600 37.9 60
XGA 1024 768 48.4 60