Tektronix Webcam 070-8030-01 User Manual
Theory of Operation
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1780R-Series Service Manual
provide a 2-field sweep. Remote sync is AC-coupled with an input impedance of
approximately 1 M
approximately 1 M
W. Q392 is a switching transistor that is turned off when
Remote Sync Enable is present and saturates when there is no enable present.
Remote sync polarity is selected by changing a plug-jumper on Diagram 9.
Remote sync polarity is selected by changing a plug-jumper on Diagram 9.
RGB Amplifier. The RGB staircase signal from the rear-panel REMOTE connector
drives an operational amplifier composed of Q197 and Q195. The amplifier is
compensated for optimum step definition by C195 (RGB Comp). A DC level
can be adjusted out by R194, the RGB Offset adjustment.
drives an operational amplifier composed of Q197 and Q195. The amplifier is
compensated for optimum step definition by C195 (RGB Comp). A DC level
can be adjusted out by R194, the RGB Offset adjustment.