Triggering 4
InfiniiVision 7000B Series Oscilloscopes User’s Guide 105
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 Press [Mode/Coupling] > HF Reject.
LF Reject
Low- frequency reject (LF reject) adds a high- pass filter with the 3- dB
point at 50 kHz. LF reject removes low- frequency signals, such as power
line noise, from the trigger path.
1 Press [Mode/Coupling] > Coupling > LF Reject.
-3 dB
Pass
Band
0 dB
DC 50 kHz
3 dB down point
Pass
Band
0 dB
50 kHz
DC
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