Configure Operation

Channels Tab

The Channels tab contains a list control with the default channels for the selected logical name. Use the Add and Remove buttons to add new channels and remove existing channels from the list. You can specify whether the oscilloscope acquires a waveform for the channel by enabling the channel in the list control.

• Preserve Existing Channels —When you enable this option, the step adds to or modifies any previously configured channels. When you disable this option, the step deletes all previously configured channels before configuring the specified channels in the list.

The Channels tab for the Configure operation also contains the following channel-specific options:

• Name —The name of the channel. The channel name must be a valid virtual channel name as the IVI configuration for the logical name being used defines.
• Vertical Coupling —Specifies how the oscilloscope couples the input signal for the channel.

  Supported Value	Description
  AC (0)	Specifies that the oscilloscope AC couples the input signal.
  DC (1)	Specifies that the oscilloscope DC couples the input signal.
  Gnd (2)	Specifies that the oscilloscope couples the channel to the ground.

• Vertical Range —The absolute value of the input range, in volts (V), for a channel. For example, to acquire a sine wave that spans between -5.0 and 5.0 V, set the value to 10.0 V. If the vertical range value does not exactly match a value an instrument driver supports, the instrument driver will coerce up to the next supported value.
• Vertical Offset —The center of the range, in volts, the Vertical Range setting specifies. This setting value is set with respect to ground. For example, set vertical offset to 5.0 V to acquire a sine wave that spans between 0.0 and 10.0 V.
• Max Input Freq —The maximum frequency for the input signal you want the instrument to accommodate without attenuating it by more than 3 dB. If the bandwidth limit frequency of the instrument is greater than this maximum frequency, the driver enables the bandwidth limit to attenuate the input signal by at least 3 dB at frequencies greater than the bandwidth limit. If the max input frequency value does not exactly match a value an instrument driver supports, the instrument driver will coerce up to the next supported value.
• Probe Attenuation —The scaling factor to which the probe attached the channel uses to attenuate the input. When the value is -1 , the oscilloscope is configured to use automatic probe sensing. When the value is positive, the oscilloscope is configured to use the specified manual probe attenuation. For example, for a 10:1 probe, set Probe Attenuation to 10.0 . If you are using automatic probe sensing, use the Get Auto Probe Sense Value operation to determine the actual probe.
• Input Impedance —The input impedance for the channel in ohms. Common values are 50.0, 75.0, and 1,000,000.0.