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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).