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3.
Press the Setup button on the front panel to enter the TRIGGER menu. The trigger type must
be Edge.
4.
Press the Holdoff Close soft key until it reads Holdoff Time.
5.
Turn the Universal Knob to set the desired hold off time.
6.
When you no longer need a holdoff time, press the Holdoff Time soft key until it reads Holdoff
Close.
5.9
Noise Rejection
Noise Reject adds additional hysteresis to the trigger circuitry. By increasing the trigger hysteresis
band, you reduce the possibility of triggering on noise. This decreases the trigger sensitivity so a
slightly larger signal is required to trigger the oscilloscope.
Press the Setup button on the front panel, and then press the Noise Reject softkey to turn noise
rejection on or off.
If the signal is noisy, you can set the oscilloscope to reduce the noise in the trigger path and on
the displayed waveform. To reduce noise from the trigger path:
1.
Connect a signal to the oscilloscope and obtain a stable display.
2.
Press the Setup button.
3.
Press the Coupling softkey and choose LF Reject or HF Reject. Alternatively, you can press
the Noise Reject softkey until it says On.
4.
Optional: Press the Acquisition button and choose the Average option to reduce random
vertical noise on the displayed waveform.
Note: Adjusting the time scale and horizontal position will not affect the hold off time.
