350 MHz at 5 mV/div 1 ns/div Sweep Rate 2.0 div/ns Writing Speed 1 MΩ & 50 Ω Input Impedances Input Protection 50 Ω Internal Automatic Deflection Factor Readout Pushbutton Ext Trigger View Battery Operation (Optional) Weighs »9.5 kg (21 lb) At just 21 pounds, the 1 ns/div, dual-trace, 350 MHz 485 oscilloscope is highly compatible with today's increasing technology. Fast 2.0 div/ns writing speed makes it especially attractive for use in field research environments. The 485 features a wide bandwidth at its full 5 mV/div vertical sensitivity (350 MHz at 50 Ω and 250 MHz at 1 ΜΩ). Selectable input impedance provides the capability to measure low and high impedance points with the same scope and without active probes. Internal detection circuitry protects the 50 Ω input by automatically disconnecting when the signal exceeds approximately 50 V RMS. You no longer have to mentally compensate for attenuating probes. Automatic vertical scale-factor readout is provided by three light-emitting diodes located around the edge of each input attenuator knob. A quick glance tells the correct on-screen V/div when the recommended 10X or 100X probes are used. You always know exactly where you are in a pulse train when making a delayed sweep measurement. An alternate sweep mode allows the delayed sweep to appear alternately with the intensified main sweep. In this mode, you can view the intensified zone and the delayed display simultaneously. The external trigger signal can be easily viewed on the 485. A front-panel pushbutton automatically routes the external signal used to trigger time base A to the vertical deflection amplifier. This feature can also be used to quickly make time comparisons between the signal of interest and the external trigger signal. On the 485, focus is always correct for single-shot photography. An autofocus circuit eliminates the need to readjust the focus each time the intensity is changed. When commercial power is not available, use the 1105 Battery Power Supply. It weighs only 19.5 pounds, and lets you take the high-per- formance 485 virtually anywhere.