Service manual

STP 11-25R13-SM-TG
S - 39
S-30. Modulated Pedestal.
The modulated pedestal signal (Figure S-39) consists of three chrominance levels (20, 40, and 80
IRE), superimposed on a 50-IRE pedestal, followed by a 50-IRE pedestal with no modulation. This signal
is used to measure chrominance/luminance intermodulation.
Figure S-39. Modulated Pedestal Signal