BK Precision 2560B Series, Руководство пользователя

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Trigger
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9.5 Trigger Coupling
Trigger coupling is only valid when the trigger source is set to an analog channel, EXT or EXT/5.
Figure 9.25 Trigger
Coupling
To set the trigger coupling:
1. Press the Setup key or use the touchscreen controls to enter the Trigger
menu.
2. Use the touchscreen controls to select the Coupling option.
– The window shown in figure 9.25 will appear.
3. Use the touchscreen controls to select the desired coupling.
Trigger coupling is separate from channel coupling.
The oscilloscope provides 4 kinds of trigger coupling modes:
DC
Allows both AC and DC components of the waveform into the trigger path.
AC
Blocks all the DC components and attenuate signals lower than 8 Hz. Use AC coupling to get a stable edge trigger when
your waveform has a large DC offset.
LF Reject
The signal is coupled through a capacitive high-pass filter network, DC is rejected and low frequencies are attenuated.
For stable triggering on medium to high-frequency signals. See the Specifications for details of the cut-off frequency.
HF Reject
Signals are DC coupled to the trigger circuit and a low-pass filter network attenuates high frequencies (used for triggering
on low frequencies). See the Specifications for details of the cut-off frequency.
Note: