Comparison table by model Model number B2901BL  Number of channels 1 or 2 1 or Output range Max. voltage 21 V  Max. current (DC) 1.5 A  Max. current (Pulse) No  Source resolution Digit 5.5 digit Min. voltage 1 μV Min. current 10 pA Lowest current range 1 μA Measurement resolution Digit 6.5 digit Min. voltage 100 nV Min. current 1 pA Min. trigger interval 200 μs Max.trigger count 10,000 Max. data buffer size 10,000  Limit test No Fast transient mode No Easy file access No View mode Single view Yes Dual view No (B2902B) Yes Graph view Yes Roll view No