Model	Input Channels	Instrument Type	Interfaces	Operation Modes	Measurements
43B	2	Handheld	Screen, PC software, RS-232 (opt)	Scope, Recorder	True-rms voltage and current, Frequency (f), Harmonics, THD, transients, Inrush current
41B	1 C;1 V-A	Handheld	PC software	Meter, Recorder	Harmonics, Frequency (f), Volts, Current (I), Crest Factor (CF), PF, DPF, K-factor, THD-F, THD-R