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Verify the bias linearity.
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| For the alpha LVDL satellite board, two DAC's provide the high and low common bias voltage for the light valve. For the beta LVDL satellite boards, one DAC provides both the high and low common bias voltage for the light valve. Note that the LVDU satellite board does not support the common bias voltage.
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| The common bias voltage is programmed to various values encompassing the entire range of the common bias voltage. The actual common bias voltage is readback using sense circuitry provide by the satellite board and a linear fit is calculated from the data points. The actual linear fit is compared to the expected linear fit and the result is displayed. The expected linear fit comprise hardcoded values dependent on the hardware version.
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| Note that the data points are displayed if verbose is enabled.
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| This command is not supported by head controller version 2.0 or greater.
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Thermal 1.0 / 1.7x equivalents:
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- The monitor command lvd linearity lvbias does not have an equivalent.
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| Thermal 2 equivalents:
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- The monitor command lvd linearity lvbias does not have an equivalent.
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COMMAND: vbs enable (<subsystem>|all) <level>
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