Performance Tests
1–48 TDS 500C, TDS 600B & TDS 700C Performance Verification and Specifications
Set upper
and lower
limits that
ensure
triggering.
Then change
limits until
triggering
stops.
Figure 1–15: Measurement of time accuracy for pulse and glitch triggering
3. Confirm the trigger system is within time-accuracy limits for pulse-glitch or
pulse-width triggering (horizontal scale >1 s):
a. Set upper and lower limits that ensure triggering at 250 kHz:
HPress the side-menu button Upper Limit. Use the keyboard to set
the upper limit to 4 s.
HPress the side-menu button Lower Limit. Use the keypad to set the
lower limit to 500 ns.
b. Display the test signal:
HSet the horizontal SCALE to 5 s.
HSet the output of the sine wave generator for a 250 kHz,
five-division sine wave on screen. Set the vertical SCALE to 20 mV
(the waveform will overdrive the display).
HPress SET LEVEL TO 50%.
c. Check against limits: Do the following subparts in the order listed.
HPress the side-menu button Lower Limit.
HUse the general purpose knob to increase Lower Limit readout until
triggering is lost.