Real measurements you can repeat on your own bench, step by step: the settings that worked, what you will see, and what to change when it goes wrong. Each was done on a scope running NovaOS, and works the same on any scope with the same features.
Decode a serial line, find its speed, and read what a device tells its radio.
An XBee radio's serial line, from the wiring to the decoded answer: the trigger on the start bit, the time base and the decoder settings.
Find an unknown baud rateMeasure one bit, divide one by it, snap to a standard rate; the U trick, how close is close enough, and when to trust the scope's Auto.
An XBee's power-up commandsProbe DIN and DOUT, capture the whole start-up in one deep record, and read the network, channels and addresses the device sets.
An ESP32's boot messageThe first serial signal to try: every ESP32 prints one at 115,200 baud on every reset. Probe one pin, press EN, decode, and read why it reset.
Get the scope to trigger, and tell a real signal from the mains around you.
Mains hum on a floating input: why a probe on nothing shows a wave, why a 10× probe shows more of it, and how to tell hum from a real signal.
Why the scope waits for a triggerAuto, Normal and Single; slope and level; and why a level that looks right still catches nothing on an idle line.
Keep its measurements right.
Reading an I²C sensor, a PWM signal's duty cycle, a power supply's ripple, probe compensation. Which measurement would help you? Tell us on NovaOS's EEVblog thread.