Opweb.de

The TDS 500D TDS 600B and TDS 700D oscilloscopes are portable, four-channel instruments suitable for use in a variety of test and measurement applications and systems. User Interface Use a combination of front-panel buttons, knobs, and on-screen menus to control the many functions of the Oscilloscope. The front-panel controls are grouped according to function: vertical, horizontal, trigger, and special. Set a function you adjust often, such as vertical positioning or the time base setting, directly by its own front-panel knob. Set a function you change less often, such as vertical coupling or horizontal mode, indirectly using a selected menu. Menus Pressing one (sometimes two) front-panel button(s), such as vertical menu, displays a main menu of related functions, such as coupling and bandwidth, at the bottom of the screen. Pressing a main-menu button, such as coupling, displays a side menu of settings for that function, such as AC, DC, or GND (ground) coupling, at the right side of the screen. Pressing a side-menu button selects a setting such as DC. Indicators On-screen readouts help you keep track of the settings for various functions, such as vertical and horizontal scale and trigger level. Some readouts use the cursors or the automatic parameter extraction feature (called measure) to display the results of measurements made or the status of the instrument. General Purpose Knob Assign the general purpose knob to adjust a selected parameter function. More quickly change parameters by toggling the SHIFT button. Use the same method as for selecting a function, except the final side-menu selection assigns the general purpose knob to adjust some function, such as the position of measure- ment cursors on screen, or the setting for a channel fine gain. GUI The user Interface also makes use of a GUI, or Graphical User Interface, to make setting functions and interpreting the display more intuitive. Some menus and status are displayed using iconic representations of function settings, such as those shown here for full, 250 MHz and 20 MHz bandwidth. Such icons allow you to more readily determine status or the available settings. Signal Acquisition System The signal acquisition system provides up to four, full-featured vertical channels with calibrated vertical scale factors from 1 mV to 10 V per division, depending on TDS model. All channels can be acquired simultaneously. Each of the full-featured channels can be displayed, vertically positioned, and offset, and their vertical coupling specified. Some models can have their bandwidth limited (250 MHz or 20 MHz). Fine gain can also be adjusted. Besides these channels, up to three math waveforms and four reference wave- forms are available for display. (A math waveform results when you specify dual waveform operations, such as add, on any two channels. A reference waveform results when you save a waveform in a reference memory). Horizontal System There are three horizontal display modes: main only, main intensified, and delayed only. You can select among various horizontal record length settings. A feature called “Fit to Screen” allows you to view entire waveform records within the 10 division screen area. Waveforms are compressed to fit on the screen. See Table 1–2. Both the delayed only display and the intensified zone on the main intensified display may be delayed by time with respect to the main trigger. Both can be set to display immediately after the delay (delayed runs after main mode). The delayed display can also be set to display at the first valid trigger after the delay (delayed-triggerable modes). The delayed display (or the intensified zone) may also be delayed by a selected number of events. In this case, the events source is the delayed-trigger source. The delayed trigger can also be set to occur after a number of events plus an amount of time.