... error±3°Trigger sourceCH1, CH2, EXT, EXT/5, LINE, AlternatingTrigger modeAuto, Normal, SingleTrigger couplingDC, AC, LF-reject ... RS232C and PASS/FAIL OUTUnique Built-in Function/Arbitrary Waveform Generator ModuleThe first digital oscilloscope with ... built-in function/ arbitrary waveform generator module in the worldMore accurate, stable and ...