Tektronix MSO70000 Series Technical Reference page 189

Performance Tests (MSO70000/C Series, DSA/DPO70000B/C Series, and DPO7000 Series)
MSO70000/C, DSA70000B/C, DPO7000B/C, DPO7000, MSO5000, DPO5000 Series
3. Confirm the AUX Trigger input (at 50 MHz):
a. Display the test signal:
Remove the 10X attenuator and reconnect the cable to Ch 1.
Set the signal amplitude as follows: 2.5 divisions
Now fine adjust the generator output until the Ch 1 Amplitude readout
indicates the amplitude is as follows (Readout may fluctuate): 250 mV
b. Check the AUX trigger source for stable triggering at limits: Do the
following in the order listed.
Use the definition for stable trigger from step 2 substep b.
Press the Trigger Source button to toggle it to Aux (Ext).
Press Push-Set 50%.
CHECK that a stable trigger is obtained for the test waveform on both
the positive and negative slopes. Press the Trigger Slope button to
switch between trigger slopes. Use the Trigger Level knob to stabilize
the trigger if required.
Enter pass or fail in the test record.
Leave the trigger system triggered on the positive slope of the
waveform before proceeding to the next check.
Press the Trigger Source button to toggle it to Ch 1.
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