Keysight InfiniiVision HD3 Series - To Enable or Disable Trigger Noise Rejection; To Enable or Disable Trigger HF Reject

Trigger Mode and Conditioning 11
Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide 157
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 Open the Conditioning dialog box by selecting Conditioning... in the Trigger
dialog box or by choosing choose Trigger > Conditioning... from the main menu.
2 In the Conditioning dialog box, select the Coupling tab.
3 Select the Noise Reject check box 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.
You can use HF Reject to remove high-frequency noise, such as AM or FM
broadcast stations or noise from fast system clocks, from the trigger path.
1 Open the Conditioning dialog box by selecting Conditioning... in the Trigger
dialog box or by choosing choose Trigger > Conditioning... from the main menu.
2 In the Conditioning dialog box, select the Coupling tab.
Pass
Band
50 kHz
DC
0 dB
-3 dB