Oscilloscope Block Diagram - Motorola R-2001A Service Manual

5-87. The horizontal amplifier input is selected between external and internal scope functions. External
functions, Time base Generator or external horizontal input, are switched to a sumation amp where the
HORIZONTAL POSITION signal from the front panel is added. The resulting DC offset positions the display
horizontally on the CRT.
5-88. Six decade sweep ranges from 1u sec to 100 msec per division are provided by the Time base
Generator. Control of the Time base Generator is from the front panel horizontal switch through the processor.
5-89. Front panel external horizontal inputs are applied to the top of the horizontal vernier gain
potentiometer. The wiper of the gain potentiometer is the EXTERNAL HORIZONTAL input signal to the
Figure 5-11. Oscilloscope Block Diagram
5-20