Tektronix MSO70000C/DX Technical Reference page 272

Performance verification (MSO/DPO70000C, MSO/DPO70000DX, and DPO7000C series)
260
Model
≥ 4 GHz models
< 4 GHz models
■ Disconnect the 50 Ω precision coaxial cable at Ch 1 and reconnect it
to Ch 1 through a 10X attenuator.
b. Check the A trigger system for stable triggering at limits:
■ Read the following definition: A stable trigger is one that is
consistent; that is, one that results in a uniform, regular display
triggered on the selected slope (positive or negative). This display
should not have its trigger point switching between opposite slopes,
nor should it roll across the screen. At horizontal scale settings of
2 ms/division and faster, Trig'd will remain constantly lighted. It
will flash for slower settings.
■ Press the Trigger Slope button to select the positive slope.
■ Adjust the Trigger Level knob so that there is a stable trigger.
CHECK that the trigger is stable for the test waveform on the
positive slope.
■ Press the Trigger Slope button to select the negative slope. Adjust the
Trigger Level knob so that there is a stable trigger.
■ CHECK that the trigger is stable for the test waveform on the
negative slope.
■ Enter pass or fail in the test record.
■ Leave the trigger system triggered on the positive slope of the
waveform before continuing to the next step.
Figure 34: Measurement of trigger sensitivity - 50 MHz results shown
MSO70000C/DX, DPO70000C/DX, DPO7000C, MSO5000/B, DPO5000/B Series
Amplitude
400 mV
700 mV