For example, :CALibrate:STARt /*Scope calibration*/ CHANnel command subsystem :CHANnel The command is used to set or query the vertical system parameters such as the bandwidth limit, coupling, vertical scale, and vertical offset of the analog channel. :CHANnel :BWLimit For example, : CHANnel1:BWLimit 1 /*Enable 20MHz bandwidth limit*/ :CHANnel1:BWLimit? /*The query returns 1*/ :CHANnel :COUPling For example, :CHANnel1:COUPling AC /*Select AC coupling method*/ :CHANnel1:COUPling? /*Query returns AC*/ 19 / 136 ▷ Before performing a self-calibration, make sure that no signals are connected to all channels until the self-calibration operation ends.
▷ During the self-calibration process, most of the key functions have been disabled. Return format Returns the status of the current calibration. Command format :CHANnel :BWLimit :CHANnel :BWLimit? Function description Set or query the bandwidth limit parameters of the specified channel. Parameter Name Type Range Default Discrete {1|2|3|4} —— Bool {{1|ON}|{0|OFF}} OFF Description OFF: Turn off the bandwidth limitation, and the high-frequency components contained in the measured signal can pass. ON: Turn on the bandwidth limitation, and the high-frequency components contained in the signal under test are attenuated.
Turning on bandwidth limiting reduces waveform noise, but attenuates high-frequency components. Return format The query returns ON or OFF. Command format :CHANnel :COUPling :CHANnel :COUPling? Function description Set or query the coupling mode of the specified channel. Parameter Name Type Range Default Discrete {1|2|3|4} —— Discrete {AC|DC|GND} DC Description AC: The DC component of the signal under test is blocked. DC: Both the DC and AC components of the signal under test can pass. GND: Both the DC and AC components of the signal under test are blocked Return format The query returns AC, DC or GND.