Full range 4 channel Max. 200MS/s (8 bit) Max. 120k word (DL1540) Max. 2M word (DL1540L) Max. 60 displays / sec update rate Built-in 3.5 inch FDD Real time printing function Evaluating magnetic recording devices Observing modulated signals Evaluating transient response of a circuit Measuring a composite TV signal Trouble shooting electronics or electric devices ■ SIGNAL OBSERVATION USING LONG MEMORY ● Capturing Signals Using Long Memory for Accurate Waveforms The DL1520/DL1540 can continuously capture signals using a record length of up to 10k words, and the DL1540L/DL1520L using a record length of up to 100k words. Within the desired observation period, the DL1520/DL1540 can thus capture sig- nals at a time resolution (sampling rate) of 10 times that for sig- nals captured using a record length of 1k word, and the DL1540L/DL1520L at a time resolution of 100 times. (You can use a longer record length when capturing a single-shot signal, or when using the roll mode.) ●Zoom Function Displays Eight Traces Simultaneously, Zooming in Quickly and Easily on Waveform Details Zooming is an important function in a digital oscilloscope with a long record length. The DL1500 series inherits the popular in- tuitive, high-speed zooming function of the DL4000 series. The DL1500 series eliminates problem of which trace to assign the zoom trace to. This scope allows you to display the captured trace and the zoomed trace at the same time. ● Recall Any Waveform with The History Memory Function (DL1540/DL1540L/DL1520L only) With a conventional digital oscilloscope, the contents of the memory are updated at every trigger. So once a waveform is up- dated, there is no way to bring the previous waveform back. However, the history memory function of the DL1540/ DL1540L/DL1520L stores the last 100 displays. ●Roll Mode for Maximum Sampling Speed of 200 kS/s Roll mode is ideal for observing low frequency signals of around 10 Hz, which is difficult to do with a conventional analog oscillo- scope. The roll mode allows a maximum sampling speed of 20 kS/s for the DL1520/DL1540, or 200 kS/s for the DL1540L/DL1520L ● Screen Update Speed Independent of Number of Traces Displayed or Waveform Processing Type As shown in the figure below, it is easy to overlook an irregular event if the digital oscilloscope has a slow screen update speed. With most digital oscilloscopes, the screen update speed falls as the number of waveforms displayed is increased, or when signal processing such as automatic measurement of the waveform pa- rameters is taking place. The DL1500 Series has been designed primarily for measuring waveforms; hence signals are measured without reducing the screen update speed even when the number of waveforms dis- played is increased or signal processing is added. ●A SINGLE OSCILLOSCOPE TO PERFORM EVERYTHING, FROM PROCESSING TO RECORDING OF THE CAPTURED SIGNAL (Optional built-in printer is needed to print captured waveforms) Automatic Waveform Parameter Measurement Function With this function you can automatically measure the maximum voltage, frequency and other parameters of a waveform.