Tektronix TDS544A Manuel d'utilisateur télécharger pdf (Page 81)

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).

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Tektronix TDS544A Manuel d'utilisateur Page 81