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Performance Tests
TDS 520A, 524A, 540A, & 544A Performance Verification
Figure 1-35: 60 Hz Rejection Test Result
Disconnect all test equipment from the digitizing oscilloscope.
6. Check Line Count Accuracy.
a. Setup oscilloscope for Line Count Accuracy Test.
Press WAVEFORM OFF.
Press CH1.
Press HORIZONTAL MENU.
Press the main-menu Record Length.
Press, if needed, the side-menu –more– 1 of 2.
Press the side-menu 5000 points in
100divs
.
Press the main-menu Horiz Scale (/div).
Use the keypad to set the horizontal scale to 200 ns (press 200,
SHIFT, n, then ENTER).
b. Check Line Count Accuracy.
Connect a composite output signal from the PAL signal source
(on the TSG 121 this refers to the signal at the rear labelled
COMPST) to the CH1 input through a 75 cable and a 75
terminator (See Figure 1-36).