Cover story
Even the smallest signal components can be represented over time with a high degree of accuracy up to a frequency of 5 GHz, for example to measure glitches or other undesirable effects (see Figure 1). This series of devices can also be used for measuring sporadic glitches, as the oscilloscope enables a very fast trigger rate of 1 million wfms/sec. The sporadic signal changes can be triggered and displayed using the versatile integrated trigger options. The device can be used as ftp server to change fast big data files between PC and test device. With extended web-control functions, the device can be controlled via PC without install any PC software. This device also offers two types
of FFT to enable efficient spectrum analysis. One variant is to convert the time signal with up to 65,535 samples. The second and extended variant uses a significantly faster FFT calculation with up to 10,000 FFT/sec. A real- time spectrum analysis can be carried out at this speed. Thus, the device is the optimal solution for complex measurement tasks in the time domain as well as in the frequency domain. For example, with a sweep-based spectrum analysis there are no blind times and more signal information can be measured and displayed. This means that extended tests, such as the leakage measurement, can be carried out with or without afterglow and complete signal information is available over the set bandwidth (see Figure 2). Here, each signal can be analyzed both in terms of time and frequency at the same time. A very extensive function with the real-
time eye diagram can optionally be used for digital signal analysis. The bit stream is superimposed in a synchronized manner with a few thousand frames and a graph is created that looks like an eye. Depending on how closed the eye is horizontally and/or vertically, this is an important quality criterion for data transmission (see Figure 3). The real-time eye diagram is not
only suitable for the visualization of the complete data transmission, but different test parameters can also be read out.
Figure 3: Real-time eye diagram measurement of a data signal with the DS70000
Figure 1: High temporal resolution of a longer time measurement at 2 Gpts and 20 GSa/sec
Figure 2: Frequency analysis with real-time mode in the DS70000 series
www.electronicsworld.co.uk April 2022 07
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