Tektronix TDS 510A, Instruction Manual, Page: 57 / 116

Performance Tests
TDS 510A Performance Verification and Specifications
1–43
Set upper
and lower
limits that
ensure
triggering.
Then change
limits until
triggering
stops.
Figure 1–14: 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:
Press the side-menu button Upper Limit. Use the keyboard to set
the upper limit to 4
m
s.
Press the side-menu button Lower Limit. Use the keypad to set the
lower limit to 500 ns.
b. Display the test signal:
Set the horizontal SCALE to 5
m
s.
Set 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).
Press SET LEVEL TO 50%.
c. Check against limits: Do the following subparts in the order listed.
Press the side-menu button Lower Limit.
Use the general purpose knob to increase Lower Limit readout until
triggering is lost.