BK Precision 2560B Series, Руководство пользователя

Страница: 42 / 224

Vertical Control
42
Note:
To set the channel coupling:
1. Press the desired channel key.
2. In the Channel Menu , use the touchscreen to press the Coupling option.
– A drop-down menu will appear with all 3 coupling option.
– Use the touchscreen to select the desired coupling.
Channel Coupling is independent of Trigger Coupling . To change trigger coupling see Trigger Coupling .
7.4.2 Bandwidth Limit
Full bandwidth will pass through signals with high-frequency components, but it also means that noise with high-frequency
components can pass through. When the frequency component of a signal is very low, better signal-to-noise ratios (SNR)
can be obtained by enabling one of the available bandwidth limits.
The 2560 provides two bandwidth limit options: 20 MHz and 200 MHz. The bandwidth limit effectively lowers the input
frequency response of the input to the selected limit value.
For waveforms with frequencies below the bandwidth limit, turning the bandwidth limit on removes unwanted high
frequency noise from the waveform.
To set the bandwidth limit:
1. Press the desired channel key.
2. In the Channel Menu , use the touchscreen to press the BW Limit option.
– A drop-down menu will appear with three bandwidth options.
– Use the touchscreen to select the desired bandwidth limit.
7.4.3 Probe Attenuation
This is set automatically if the oscilloscope can identify the connected probe. The 2560 provides 1X, 10X, 100X
and custom probe attenuation factor options. The custom values can be between
10
− 6
𝑡𝑜 10
6
. The oscilloscope will
automatically convert the vertical scale according to the current probe attenuation factor.
For example, the vertical scale of the oscilloscope under 1X attenuation is 100 mV/div, and the vertical scale will be
automatically set to 1 V/div if the probe attenuation is changed to 10X. If a standard probe with readout terminal is
connected, the oscilloscope will automatically set the probe attenuation to match the probe.
To set the probe attenuation:
1. Press the desired channel key.
2. In the Channel Menu , use the touchscreen to press the Probe option.
– The Probe submenu will appear with four bandwidth options.
– Use the touchscreen to select the desired probe attenuation.