If you get the "Sorry, the file cannot be displayed. There seems to be a technical issue ..." error when trying to view an image, a workaround is to click on the cog icon in the upper right side of the media viewer, and then select "Disable Media Viewer". We are aware of the problem and are looking for a solution.
The 155-0151-00 (M159) is a Tek-made trigger generator chip.
Features include slope selection, hysteresis adjustment, trigger level centering, free-run input, trigger view outputs centered around ground, and an operational amplifier with typical open-loop gain of 500.