evertz 5950-SID Instruction Manual page 37

Model 5950-SID VITC Reader / Source ID Decoder Manual
Character style selection is accomplished by the on screen programming
menu.
The pixel oscillator consists of monostable U32b and associated
components. The oscillator frequency which determines horizontal size of
the characters is adjusted by the digital trimpot (NVPOT) U34 and
associated components. The MCU writes different values to the NVPOT
which control the adjustment input to voltage regulator U33, which in turn
sets the voltage present for the RC timing network of the monostable. The
starting position of the characters at the left of the screen is determined by
monostable U32A. The left position of the characters is adjusted by trimpot
VR1.
TECHNICAL DESCRIPTION Page 4-9