the 1000 series from rigol include the b, d, and e series oscilloscopes. the e series are the value leader with 50-100 mhz models that include 2 channels and 1 million points of memory. the d series add low speed digital capture enabling basic mixed signal analysis in a economic package. the b series provide more speed and power including our economic 4 channel, 200 mhz ds1204b model which provides 2 gsa/sec sampling. with features including ffts, record and replay, roll mode, alternate trigger mode, and adjustable trigger sensitivity the 1000 series is a great entry for value oscilloscope requirements.