The 442 is a portable, 35 MHz, dual trace instrument with a choice of alternate or chop sweep presentation on a single time base. The Vertical Amplifier provides calibrated deflection factors from 2 mV to 10 V/div. The Time Base provides stable triggering over the full bandwidth of the vertical Amplifier and provides calibrated sweep rates from 0.5 s/div to 0.1 µs/div. A X I0 magnifier switch extends the fastest sweep rate to 10 ns/div.