Internal Channels for E Series Devices
The following table is a list of internal physical channels for all E Series devices. Different E Series devices have different subsets of channels. These channels are typically for self-calibration, and you can sample them as you would a physical channel present on the I/O connector.
| Internal Channel Name | Description |
|---|---|
| _aognd_vs_aognd | A differential terminal with the positive and negative terminals both connected to the ground reference for analog output. |
| _aognd_vs_aignd | A differential terminal with the positive terminal connected to the ground reference for analog output and the negative terminal connected to the ground reference for analog input. |
| _ao0_vs_aognd | A differential terminal with the positive terminal connected to physical channel ao0 and the negative terminal connected to the ground reference for analog output. |
| _ao1_vs_aognd | A differential terminal with the positive terminal connected to physical channel ao1 and the negative terminal connected to the ground reference for analog output. |
| _calref_vs_calref | A differential terminal with the positive terminal connected to the onboard 5 V reference and the negative terminal connected to the onboard 5 V reference. |
| _calref_vs_aignd | A differential terminal with the positive terminal connected to the onboard 5 V reference and the negative terminal connected to the ground reference for analog input. |
| _ao0_vs_calref | A differential terminal with the positive terminal connected to physical channel ao0 and the negative terminal connected to the onboard 5 V reference. |
| _ao1_vs_calref | A differential terminal with the positive terminal connected to physical channel ao1 and the negative terminal connected to the onboard 5 V reference. |
| _ao1_vs_ao0 | A differential terminal with the positive terminal connected to physical channel ao1 and the negative terminal connected to physical channel ao0. |
| _boardTempSensor_vs_aignd | A differential terminal with the positive terminal connected to the onboard temperature sensor and the negative terminal connected to the ground reference for analog input. |
| _aignd_vs_aignd | A differential terminal with the positive terminal connected to the ground reference for analog input and the negative terminal connected the ground reference for analog input. |
| _caldac_vs_aignd | A differential terminal with the positive terminal connected to the onboard calibration DAC and the negative terminal connected to the ground reference for analog input. |
| _caldac_vs_calref | A differential terminal with the positive terminal connected to the onboard calibration DAC and the negative terminal connected to the onboard 5 V reference. |
| _PXI_SCXIbackplane_vs_aignd | A terminal where a signal being conditioned by a SCXI module is measured across the PXI/SCXI backplane and not the I/O connector. Reading from this channel is valid only on PXI devices inserted in the rightmost PXI slot of a PXI/SCXI combination chassis. |