+ /**
+ * Channel regulation
+ * get: "CV", "CC" or "UR", denoting constant voltage, constant current
+ * or unregulated.
+ * "CC-" denotes a power supply in current sink mode (e.g. HP 66xxB).
+ * "" is used when there is no regulation, e.g. the output is disabled.
+ */
+ SR_CONF_REGULATION,
+
+ /** Over-temperature protection (OTP) */
+ SR_CONF_OVER_TEMPERATURE_PROTECTION,
+
+ /** Output frequency in Hz. */
+ SR_CONF_OUTPUT_FREQUENCY,
+
+ /** Output frequency target in Hz. */
+ SR_CONF_OUTPUT_FREQUENCY_TARGET,
+
+ /** Measured quantity. */
+ SR_CONF_MEASURED_QUANTITY,
+
+ /** Equivalent circuit model. */
+ SR_CONF_EQUIV_CIRCUIT_MODEL,
+
+ /** Over-temperature protection (OTP) active. */
+ SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE,
+
+ /** Under-voltage condition. */
+ SR_CONF_UNDER_VOLTAGE_CONDITION,
+
+ /** Under-voltage condition active. */
+ SR_CONF_UNDER_VOLTAGE_CONDITION_ACTIVE,
+
+ /** Trigger level. */
+ SR_CONF_TRIGGER_LEVEL,
+
+ /** Under-voltage condition threshold. */
+ SR_CONF_UNDER_VOLTAGE_CONDITION_THRESHOLD,
+
+ /**
+ * Which external clock source to use if the device supports
+ * multiple external clock channels.
+ */
+ SR_CONF_EXTERNAL_CLOCK_SOURCE,
+
+ /** Offset of a source without strictly-defined MQ. */
+ SR_CONF_OFFSET,
+
+ /** The device supports setting a pattern for the logic trigger. */
+ SR_CONF_TRIGGER_PATTERN,
+
+ /** High resolution mode. */
+ SR_CONF_HIGH_RESOLUTION,