The family consists of four digital general purpose oscilloscopes with model numbers PM3382, PM3384, PM3392 and PM3394. All instruments have four vertical channels. Differences between these models are the vertical bandwidth, the features of the vertical channels 3 and 4 and the presence of switchable 50Ω input impedance. Vertical bandwidth is 100 or 200 MHz. The ’true 4 channel’ oscilloscopes have four channels with a wide range of input sensitivities. Channel 3 and 4 in the ’4 channel’ versions offer the most commonly used input sensitivities (0.1 and 0.5 V/div).