"Under-voltage condition threshold", NULL},
{SR_CONF_TRIGGER_LEVEL, SR_T_FLOAT, "triggerlevel",
"Trigger level", NULL},
+ {SR_CONF_EXTERNAL_CLOCK_SOURCE, SR_T_STRING, "external_clock_source",
+ "External clock source", NULL},
/* Special stuff */
{SR_CONF_SESSIONFILE, SR_T_STRING, "sessionfile",