Model	Test Freq. Range Low	Test Freq. Range High	Resistance Range Low	Resistance Range High	Capacitance Range Low	Capacitance Range High	Measurements
4294A	40 Hz	110 MHz	5 mOhm	500 Mohm	?	?	Z, Y, R, X, G, B, L, C, D, Q, Phase
4294A	40 Hz	110 MHz	3 mOhm	500 Mohm	?	?	Z, Y, R, X, G, B, L, C, D, Q, Phase
4285A	75 kHz	30 MHz	1 mOhm	100 Mohm	0.00001 pF	999.999 uF	Z, Y, L, C, R, G, D, Q, Rs, Rp, X, B, Phase
4288A	1 kHz	1 MHz	1 mOhm	1000 Mohm	0.00001 pF	20 uF	Cp-D, Cp-Q, Cp-Rp, Cp-G, Cs-D, Cs-Q, Cs-Rs
4287A	1 MHz	3 GHz	200 mOhm	3 kOhm	?	?	Z, Y, Ls, Lp, Cs, Cp, Rs, Rp, X, G, B, D, Q
4284A	20 Hz	1 MHz	10 mOhm	100 Mohm	0.01 fF	9.99999 F	Z, Y, L, C, R, G, D, Q, Rs, Rp, X, B, Phase
4263B	100 Hz	100 kHz	1 mOhm	100 Mohm	1 pF	1 F	Z, R, X, Y, G, B, C, L, D, Q, U
4263B	100 Hz	100 kHz	1 mOhm	100 Mohm	1 pF	1 F	Z, Y, R, X, G, B, C, L, D, Q, Phase
E4991A	1 MHz	3 GHz	130 mOhm	20 kOhm	?	?	Z, Y, Ls, Lp, Cs, Cp, Rs, Rp, X, G, B, D, Q, Phase
4268A	120 Hz	100 kHz	1 mOhm	100 Mohm	0.0001 nF	0.9999 mF	Cp-D, Cp-Q, Cp-Rp, Cp-G, Cs-D, Cs-Q, Cs-Rs