Performance Tests
TDS 684A, TDS 744A, & TDS 784A Service Manual 4–77
Figure 4–36: Line Count Accuracy Correct Result Waveform
HDisconnect all test equipment (TSG 121) from the digitizing
oscilloscope.
HTurn off cursors by pressing CURSOR, then the main-menu
Function button, and, finally, Off from the side menu.
7. Check the Sync Duty Cycle.
a. Set up digitizing oscilloscope for Sync Duty Cycle Test.
HPress TRIGGER MENU.
HPress the Standard pop-up to select FlexFmt. Trigger Type should
already be set to Video.
HPress the main-menu Setup.
HPress the side-menu Field Rate.
HUse the keypad to set the field rate to 60.05 Hz (press 60.05, then
ENTER).
HPress the side-menu Lines.
HUse the keypad to set the field rate to 793 lines (press 793, then
ENTER).