Tektronix TDS544A Manual do Utilizador descarregar pdf (Página 77)

Performance Tests

TDS 520A, 524A, 540A, & 544A Performance Verification

m. CONFIRM that the TRIG’D LED stays on and that the waveform on

screen is stable. ie; does not move horizontally or vertically. Also,

CONFIRM that the waveform on the screen has one positive pulse

and a number of negative pulses (See Figure 1-30).

Positive pulse

Negative pulses

Figure 1-30: Triggered Signal Range Test – 300 mV

n. Use the keypad to set the fine scale to 75 mV (press 75, SHIFT, m,

then ENTER).

o. CONFIRM that the TRIG’D LED stays lit and that the waveform on

screen is stable. ie; does not move horizontally or vertically. Also,

CONFIRM that the waveform on the screen has one positive pulse

and a number of negative pulses (See Figure 1-31).

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Tektronix TDS544A Manual do Utilizador Página 77