Tektronix TDS500C Manuale Utente Scaricare il pdf (Pagina 92)

Performance Tests

1–76

TDS 500C, TDS 600B & TDS 700C Performance Verification and Specifications

Figure 1–34: 60 Hz Rejection test result – TDS 684B shown

6. Check Line Count Accuracy.

a. Set up oscilloscope for Line Count Accuracy Test:

H Press WAVEFORM OFF.

H Press CH1.

H Press HORIZONTAL MENU.

H Press the main-menu Record Length.

H Press the side-menu –more– until you see the appropriate menu.

H Press the side-menu 5000 points in 100divs.

H Press the main-menu Horiz Scale (/div).

H Use the keypad to set the horizontal scale to 200 ns (press 200,

SHIFT, n, then ENTER).

b. Check Line Count Accuracy:

H Connect a composite output signal from the rear of the PAL signal

source (labeled COMPST on the TSG 121) to the CH1 input

through a 75 W cable and a 75 W terminator. See Figure 1–35.

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Tektronix TDS500C Manuale Utente Pagina 92