Keysight DSOX1202A, Руководство пользователя

Страница: 125 / 330

Trigger Mode/Coupling
12
Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide 125
Low frequency reject removes any unwanted low frequency components
from a trigger waveform, such as power line frequencies, etc., that can
interfere with proper triggering.
Use LF Reject coupling to get a stable edge trigger when your waveform has
low frequency noise.
• TV coupling — is normally grayed-out, but is automatically selected when
Video trigger is enabled in the Trigger menu.
Note that Trigger Coupling is independent of Channel Coupling (see "To specify
channel coupling" on page 50).
To enable or disable trigger noise rejection
Noise Rej adds additional hysteresis to the trigger circuitry. By increasing the
trigger hysteresis band, you reduce the possibility of triggering on noise. However,
this also decreases the trigger sensitivity so that a slightly larger signal is required
to trigger the oscilloscope.
1 Press the [Trigger] key.
2 In the Trigger menu, press Reject ; then, select Noise Reject .
3 Press Reject again (or push the Entry knob) to enable or disable.
To enable or disable trigger HF Reject
HF Reject adds a 50 kHz low-pass filter in the trigger path to remove high
frequency components from the trigger waveform.