Keysight DSOX3012T, Руководство пользователя

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Trigger Mode/Coupling
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Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 213
Changing the time base settings does not affect the trigger holdoff time.
With Keysight's MegaZoom technology, you can press [Stop] , then pan and zoom
through the data to find where the waveform repeats. Measure this time using
cursors; then, set the holdoff.
External Trigger Input
The external trigger input can be used as a source in several of the trigger types.
The external trigger BNC input is labeled EXT TRIG IN .
The external trigger input impedance is 1M Ohm. This lets you use passive probes
for general-purpose measurements. The higher impedance minimizes the loading
effect of the oscilloscope on the device under test.
To set the EXT TRIG IN units and probe attenuation:
1 Press the [Mode/Coupling] key in the Trigger section of the front panel.
2 In the Trigger Mode and Coupling Menu, press the External softkey.
3 In the External Trigger Menu, press the Units softkey to select between:
• Volts — for a voltage probe.
• Amps — for a current probe.
CAUTION
Maximum voltage at oscilloscope external trigger input
300 Vrms, 400 Vpk
1M ohm input: For steady-state sinusoidal waveforms derate at 20 dB/decade above
100 kHz to a minimum of 5 Vpk