Agilent Technologies 54657A Dokumentacja Pobierz pdf (Strona 61)

Low frequency reject (LF Reject) adds a high pass filter with the 3-dB point at

50 kHz (see figure 2-20). Use LF reject to remove low frequency signals such

as power line noise from the trigger path.

LF reject (trigger path)

Noise reject increases the trigger hysteresis band. 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.

Random noise on the displayed waveform

3 dB down point

Pass

Band

0 dB

50 kHz

Figure 2-20

Figure 2-21

Operating Your Oscilloscope

To reduce the random noise on a signal

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Agilent Technologies 54657A Dokumentacja Strona 61